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Full text of "Commonwealth of Massachusetts state building code"

BOSTON 

PUBLIC 

LffiRARY 




Digitized by the Internet Archive 

in 2010 with funding from 

Boston Public Library 



http://www.archive.org/details/commonwealthofma2001mass 



THE MASSACHUSETTS 
STATE BUn^DING CODE 

USER'S GUIDE 



to 

780 CMR 

Sixth Edition 




COMMONWEALTH OF MASSACHUSETTS 



Published by 

WilDam F. Gaj^. 

Secretary of the Commonwealtfa 



2/19/97 



THE USERS' GUIDE TO THE SIXTH EDITION 

PART I - OVERALL CHANGES 

The Stah Edition of the Massachusetts State Building Code is based on the pro^asions of the 1993 BOCA 
National Building Code. However, since sigmficant changes have been nude to the national code, the Sixth 
Edition is considered a unique document to the Commonwealth. One should not assume that the two 
documents are compatible. There are several reasons for differences between the two codes, some of which 
are identified below. 

(1) In some instances, requirements of Massachusetts General Laws (M.GX.) conflict with provisions 
of the national tode. Since law is superior to regulation, the national code must be stripped of any 
conflicting language. 

(a) The Board of Building Regulations and Standards (BBRS) is fortunate to employ the services of 
various subcommittees comprised of learned and experienced professionals who donate thdr time in 
review of the code. Members of these subcommittees focus on certain aspects of the code and adapt 
its language to suit local peculiarities that may not be considered in the national code. These 
subcommittees include: 

1 . The Geotechnical Advisory Comnuttee. 

2. The Fire Prevention, Rre Protection Advisory Committee, 

3. The Loads Advisory Comminee, 

4. The Seismic Advisory Committee, and 

5. The Energy Advisory Committee. 

Also, Massachusetts must coordinate the provisions of the state building code with the provisions of 
other specialized codes under the control of sq>aiate independent boards. Some of the specialized codes 
indude: 

6. The Fire Prevention Code (527 CMR), 

7. The Elevator Code (524 CMR), 

8. The Architectural Access Regulations (521 CMR), 

9. The Plumbing and Gas Code (248 CMR), and. 

10. The Electrical Code (527 CMR). ' 

(b) The following diapters, are considered entirely tmique to the Commonwealth differing ngnificantly 
fiiom the national code, and are so identified with a parenthetical statement below the chapter title. 
The chapters indude: 

Chapter 1 - Administration 

Chapter 9 - Fire Protection Systems 

Chapter 1 1 - Accesability 

Chapter 13 - Energy Conservation 

OaptcT 16 - Structural Loads 

Chapter 18 - Foundations and Retaining Walls 

Chapter 27 - Electrical Wiring and Equipment 

Chapter 29 - Plumbing and Gas Fitting 

Chapter 30 - Elevator and Conveying Systems 

Chapter 34 - Repair, Alteration and Change of Use of Existing Buildings 

Chapter 35 - Manu&ctured Buildings, Building Components and Mobile Homes 

Chapter 36 - The One and Two Family Dwellmg Code 

(c) Changes in other chapters are identified with bolded. italidzed face type. 

(2) Part n of this Guide contains a summary of some of the major changes relative to the national .code 
and to the Fifth Edition of the Massachusetts Building Code. 

(a) The first change a user will note in the Sixth Edition of the code is the numbering system. 
Recently, three national code agencies joined forces in the hopes of someday produdng a uniform, 
intenational building code. The first matter that these agendes agreed upon in this pursuit was to use 
a chapter format in lieu of the article system. MassachusflKs-has foUowed this lead. 

(b) Recognizing the fiustration that may develop in attempting to retrieve information utilizing this 
new system, a cross-index of anicle and primary section numbers of the Fifth Edition relative to the 
chapter and primary section numbers of the Sixth Edition is included as Part HI of this Guide (again, 
please note that Part HI is wi meant as an absolute authoritative source identifying all changes from the 
Fifth Edition - refer to the actual code for definitive requirements). 

780 CMR - Sixth Edition / 



780 CMR; STATE BOARD OF BUILDING REGULATIONS A>JD STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

PART li - SUMMARY OF CHANGES TO EACH CHAPTER 

CAUTION 

These summaries are meant as a transiiion tool for users of the Sixth Edition of the Massachusetts State 
Building Code and only highlight cenain major changes. The summaries are not designed as an 
authoritative source for all changes either from the National Building Code or the Fipt Edition of the 
Massachusetts State Building Code. Always refer to the actual code documents for definitive 
requirements. 

Pan n of this Guide contains brief summaries of the major changes from BOCA National Building Code, 
and from the Fiflh Edition of the Massachusetts State Building Code. 

CHAPTER 1 - ADMINISTRATION 
(Frfih Edition Article 1) 
DifTerences from National Building Code: 

Chapter 1 is considered unique to Massachusetts. Essentially it is a combination of Fifth Edition 
requirements and the national document. 

Changes from tht Fifth Edition of the Massachusetts State Building Code: 

Some of the major changes in Chapter 1 occur in Section 105, v^^ch defines the qualifications and 
certificauon requirements for all those who serve as buUding code enforcement officials in the 
Commonwealth; Secnon 1 10.0. which delineates procedures for the placement of manufactured buUdings 
(requumg a Hcensed construction supervisor to secure a permit for the woric and a certified set crew to 
msoD the structure); Section 116.0, which more cleariy defines the role ofregistered architects and 
profeaaonal cn^neers in the course of buflding construction; and Section 121.0 which defines the remedy 
available to person ordered to remove a dangerous stiucmre (the route is through the courts not throueh 
a board of appeals). 

CHAPTER 2 - DEFlNrnONS 

{Fifth Edition Ai^d&l) 
DifTerences from the National Code , 

AD d^'ons fr6m the national code appear in this chapter. In a few instances, the wording was modified 
to retl«a Massachusetts law or to clarify a definition. Also, some definitions specific to Massachusetts 
were added, such as inspeaor of bufldings and local inspeaor. 

Changes from the Fifth Edition of the Massachusetts State BuUding Code: 

^'Sr^u^'^'"? areprovided for in Chapter 2. the national code chooses to separate others and 

fo .^«„rf "^^"^ " "^"^ "^^ '°°« =*°^ ^'^"^ ^°' '"'^^ ^OTds and terms specific 

10 means of egress requirements are found in Chapter 10, not Chapter 2. 

CHAPTER 3 - USE OR OCCUPANCY 

(F^ Edidon Article 3) 
DifTerences from the National Code: 

frTeJeaiT'T'"' ^'l *' "'"°"^ "'^'- ^°^^' P^™^'^ "^Section 3 13.0. Mixed Use Groups, 
buUdiJs ' "" "" °^ " ^^P^^ ' ^^^^^ ^° ^'^ suppression requirements of certSn- 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

oc'Z^cf artl^^^tir^TJ- ""'" '! f°""' "^='°" '°'- "^=^ '^^^-^ requirements for certain specific 
tia.ara Use Croup Classiftcatjon, whereas, the Fifth Edition defines only one. 



7S0 C.vm - Sixth Ediiion 



780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS' GUIDE 

CHAFTEK 4 - SPEOALUSE AP«) OCCUPANCY 
{Fifih Edjdon Artide 6) 
Difrerences from the National Code: 

Chapter 4 is conastent •with the National Code from Sections 401.0 to 421.0 excepting changes 
incorporated due to conflicts with Massachusetts laws and\or regulations, such as those that occur in 
Section 603.0. defining the limits of high rise buildings, and Section 421.0, defining requirements for 
inground swimming pools. 

Sections 422.0 through 429.0 arc unique to the Commonwealth, defining special uses that do not appear 
in the national code. Some of these sections have been brought forward from the Fifth Edition of the code 
with little change; they include proviaons for existing structures in Section 422.0, summer camps for 
children in Section 425.0, and detoxification centers in Section 428.0. 

Sections 423.0, 427.0 and 429.0 which define fecial code provisions for group readences, limited group 
residences, and group dwelling units have been brought forward but have been modified to reflea new 
phQosophies in the care of the occupants of these residences. These changes appear for the first time in 
the Sixth Edition of the code. The day care proviaons in Section 424.0 have also been modified to increase 
occupant safety. 

Posably the most significant change to Chapter 4 appears in Section 426.0. This section defines 
requirements for bulk storage merchandising buildings. Such buildings contain sales areas with high piled 
combustible commodities, and^r hazardous materials. Inherently, these structures present different fire 
and fife safety risks tiian traditional retail structures. Section 426.0 provides adequate safety to the patrons 
of these forties and reduces the posability of excessive property loss due to fire. The section is newly 
devdoped for the Sixth Edition of the ocxle. 

DifTerences from the Fiftk Edidon of the MassachnsettsState Bnilding Code: 

Chapter 4 is significantly different than the compatible Fifth Edition of the code. To stan. sf>ecial use 
provisions are no longer found in Article 6, also several new provisions have been added such as those 
defined above, and more detailed requirements for high hazard uses. 

CHAPTER 5 - GENERAL BUILDING UMTTATIGNS 
(FyihEiMonArddeS) ■ 
Differences from the National Code: 

Chapter 5 is ahnost entirely compatible with the national code, excepting the addition of note m to Table 
503 which cautions the code Aiser to a distinction of Massachusetts general law requirii»g hosptudx other 
than college or school infirmaries, to be erected of Type IB construction or better. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

Chapter 5 is very similar to the comparable Fifth EcBtion article. Methodoligies reUtmg to building size 
have remained constant for years, dating to work of insurance companies that ohgmaDy developed the 
requirements. However, some requirements that appeared in the bmldir^ linutatiom section of Article 5 
have been moved to a more appropriate place. Provisions for accesability, for instance are found in 
Chapter 11. 

CHAPTER 6 - TYPES OF CONSTRUCTION 

{F^ Edition AiUdt 4) 

Differences from the National Code : 

Chapter 6 is entirely compatible with the national code. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

Types of construction are located in Artide 4 in the Fifth £drll»»^. Location is the major change in the new 
code, some language is condensed relating to the description for the five types of construcuon. 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

CHAPTER 7 - FIRERESISTANT MATERIALS AND CONSmUCTlON 

(fj/JA EtTawn Article 9) 
DifTerences from the National Code: 

Chapter 7 is entirely compatible with the national code. 

Changes from the Fifth Edition of the Massachusetts State Building Code : 

Fireresistance rating of construction materials were located in Article 9 of the Fifth Edition. Alone with 
location, several changes have occurred in the code text. Examples of change are found in Section 708.0 
which Hmits opening sizes in fire wall assemblies. Section 713.0 which defines minimum fire resistance 
ratings for floor\ceiling and rooAceiling assemblies in certain residential buildings. Section 717.0 wluch 
determines approval of fire dampers, and fire damper ratings, and 720.0 which requires the installation of 
firestopping and draftstopping. 

CHAPTER 8 - INTERIOR FINISHES 

{Fifth Edidon AnadtS) 
Differences from the National Code: 

Chapter 8 is entirely compatible with the national code. 

Changes from the Fifth Edition of the Massachusetts State Building Code : 

Interior finishes were part of Article 9 in the Fifth Edition under Sections 922.0 through 925.0. Since 
interior finishes can have a significant efifea on a building's internal fire load. These provisions are 
separated in the Sixth Edition to emphaaze the importance of properly regulating the placement of 
combustible trim, floor finishes, and interior hangings and decorations. Additionally, Section 806.0 limits 
the use of combustible materials in Types 1 and 2 constniction. Chapter 8 should beutilized in concert 
with the provisions of 527 CMR, The Massachusetts Fire Prevention Code. 

CHAPTER 9 - FIRE PROTECTION SYSTEMS 

(Fifth Edhion Article 10) 
Differences from the National Code: 

The provisions of Chapter 9 were developed by the Fire Prevention\Fire Protection Advisory Committee 
whose make-up is defined in the forward of the code. 

Chapter 9 is ngnificantly different than the national code and is considered unique to the Commonwealth, 
particularly in its requirements for fire suppression systems. Section 904.0 identifies where fire 
suppression systems are required in buildings based upon the building's size and use group classificanorL 

Recogninng inherent life safety hazards posed by certain building types, and fijrther recognizing the 
tremendous loss due to fire that has occurred in certain building types over the years, the Sixth Edition of 
the code requires fire suppression systems to be installed in buildings at levels not antidpated by the 
national code. For instance Section 904.2 of the national code, allows an assembly use, such as a motion 
picture theater, to be ereaed unsuppressed up to 12,000 square feet. The comparable Sixth Edition section 
requires a fire suppression system to be installed when it exceeds 8,000 square feet 

Also, Chapter 9 does not recognize the lermftre area, which is often used in the pages of the national code. 
The term fire area is defined as "the aggregate floor area enclosed and bounded by fire walls, exterior 
walls, or fire separating assemblies". Utilizing this concept in the design of mixed use buildings (Seaion 
313.0 of the code) allows the code user to design and erert buildings that sacrifice fire suppression for fire 
resistive construction. Essentially, the result of such a design is a building that is (or may be) suppressed 
in one area, but not another. Such buildings may provide a false sense of security for the occupant, and 
cause logistical problems for fire service personnel who must fight the fire (ie: the firefighter does not 
necessaniy know which portion of the building is fitted with a suppression system, and which is not; a fact 
he needs to know to adequately fight the fire or deal with the emergency). This is not to say that separated 
mixed used buildings are not an option under the new code. However, once the size of a building exceeds 
a certain dimension (dependent upon its use group), a suppreslitSfi'System is required, regardless of whether 
the uses are separated fi-om one another with fireresitance rating construction, which may render the 
separated mixed use option irrelevam. 



780 CMR - Sixxh Edition 



' 7S0CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS* GUIDE 

Chaises to Chapter 9 are the result of many months of review of the national code. Some of the reasons 
for change are identified above. However, there are additional benefits to both the code user and the 
building occupant resulting from these changes. It is wonh noting that many municipalities in the 
Commonwealth experience some difficulty developing and maintaining a properly staffed fire department, 
and are often challenged in fighting larger fires. With the changes in fire suppres^on requirements, some 
of the burden may be lifted fi-om these depanments. 

Changes from the Fifth Edition of the Massachusetts State Building Code: ' 

Chapter 9 has not only been relocated in the Sixth of the code, but has also been ^gnificantly changed in 
technical content. The format of Chapter 9 takes a more sobering look at issues of fire suppression and 
alarming and presents requirements in a more concise and logical pattern. It may be considered as 
different fi-om J^fih Edition Massadiusetts code as it is fit>m the national code. 

ARTTCLE 10 - MEANS OF EGRESS 
(Fifth EtEtion Ar^dt 8) 
Changes from the National Code: 

Chapter 10 is nearly compatible to the national code. Changes appear in Rmited sections. 

The first change, an addition to the national code, occurs with the insertion of Section 1004.2 which 
empowers the buSding offidal to issue an exit order to a building owner when a hazardous ^ress 
condition is cited. Although this language is conastent with current praaices in the Commonwealth, it 
is different fi^om the requirements of the national code. 

A second change occurs in Table 1010 J of the code. Unlike the national code, the Sbah Edition only 
allows one means of ^ress fix>m buildings in very fimited ii:stance& (i^- ^^^ groups B and S-2 that meet 
ardent restrictions in terms of building sze and occupant travd distance). 

A third diange appears in Section 1017.4.1 pertaining to the locking of egress doors. Actually, the section 
varies, fi-om the national code in two counts under this section. First, point number 8 under section 
1017.4.1 allows for the locking of certain doors in I-l and 1-2 occupandes when other life safety concerns 
are at issue. Second, Section 1017.4.1.2 allows for special locking arrangements in certain business 
occupancies w^en security issues conflict with code requirements. In each of these instances, the code has 
responded to building owner needs, care&illy balancing issues of security and life ^ety without to either. 
When egress doors are locked under theseprovisions, additional life safety features are required. 

Adcfitional changes are made to the provisions of Ch^ter 9 to ensure that it jibes with Massachusetts law 
and regulation. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

Mai^ of the comments e:q}ressed above apply in respect to dianges fiom the Fifth Edition Massachusetts 
code text. Means of egress requirements, in mai^ instances, have changed and should be carefully 
reviewed by the code user. 

CHAPTER 11 - ACCESSIBILnY 
{r0i Edidon Section 512J>) 
DifTerences from the National Code: 

The provisions of Chapter 1 1 as they appear m the national code have been deleted. Chapter 11 in the 
Sixth Edition refers to 521 CMR. the Rules and Regulations of the Architectural Access Board (AAB 
regulations). The Architectural Access Board is empowered to promulgate these regulations under 
Massachusetts general law. Although it is a separate regulation under the control of a different agency, 
the provisions of the AAB regulations are enforced by munidpal and state building ofBdals. The code 
user is cautioned that there may be :ngnificant differences fTX>m the national code, and should refer only 
to 521 CMR for regulations pertaining to building accessibility. 

Changes from the Fifth Edition of the Massachusetts StateBuilding Code: 

Reference to AAB regulations appeared in Section 512.0 of the Fifth Edition of the code. See above 
comments for changes- 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

ARTIdi: 12 - INTERIOR ENVIRONMENT 

(Fifth Edmoh - Artide 7) 
DifTercnces from the National Code: 

The Sixth Edition of the code requires all newly constructed buildings to mechanically ventilate bathrooms 
and toilet rooms (natural ventilation of such spaces is not allowed as a substitute for mechanical 
ventilation). , 

Access to attics and crawl spaces, if separating conditioned from unconditioned space, shall be weather- 
stripped and closed tightly. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

Bathroom mechanical ventilation requirements now include one- and two-family housing whereas the Fifth 
Edition of the code exempted one- and two-family housing bathrooms and toilet rooms from such required 
mechanical ventilation. 

Access to attics and crawl spaces, if separating conditioned from unconditioned space, shall be weather- 
stripped and close tightly. 

Rat-proofing requirements are now found in Chapter 12 

ARTICLE 13 - ENERGY CONSERVATION 

{FyUi Edition - Artide 31) 

DifTerences from National Code: 

Chapter 13 of the Code does not yet require that new construction low-rise residential buildings conform 
to the requirements of the Coundl of American Building OfBcials (CABO) Model Energy Code, 1995 
version (MEC95). 

Chapter 13 will, however, require conformance to a Massachusetts version of MEC95 commencing 
March 1, 1998 - see front sheet of Chapter 13 and front of Appendix J. 

One- and two-femily housing now explicitly requires thermostats for each floor containing conditioned 
space. 

Hecirical oudet plate gaskets are now required on all receptacles, switch or other elearical boxes in walls 
separating conditioned from unconditioned space. 

Changes from the Fifth Edition of the Massachusetts State Building Code 

See "Differences from National Code" above. 

CHAPTER 14 - EXTERIOR WALL COVERINGS 
{Fyih Edition Artide 21) 
DifTerences from the National Code: 

Chapter 14 is entirely compatible with the national code. 

Changes from the Fifth Edition of the Massachusetts State Building Code; 

Changes made relative to provisions for exterior walls are in respea to its location in the code and changes 
reflecting technological advances in anchoring systems and building material combustibility 

CHAPTER 15 - ROOFS AND ROOF STRUCTURES 
{F^ Edition Artide 23) 
Differences from the National Code: 

Chapter 15 is entirely compatible with the national code, except, generic language referring to climaaic 
conditions no: relevant to the Commonwealth have been deleted. 

Chnnges from the Hfth Edition of the Massachusetts Sta«e«BuiIding Code: 

Changes made relative to provisions for roof and roof structures are in respect to location in the code and 
changes reflecting technological advances. 



7S0 CVTR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS' GUIDE 

CHAPTER 16 - STRUCTURAL LOADS 
{Fifth EdMon Article 11 ) 
DifTerences from the National Code: 

The proviaons of Chapter 16 were reviewed and fiirther developed by both the Loads and the Seismic 
Advisory Committees whose make-up are defined in the forward of the code. 

Wind load provisions have been simplified; snow load zones are considered unique to Massachusetts; the 
use of importance feaors for snow load design is not utilized; seismic design is based on a peak velocity 
related acceleration (a^) of 0.12 throughout the entire state; superfluous requirements dealing with loading 
criteria outside Massachusetts have been deleted. 

Changes from the Fifth Edition of the Massachusetts State BuHding Code : 

Sasmic deign has been amended to reflect current design philosophy. 

CHAPTER 17 - STRUCTURAL TESTS AND INSFECHONS 

( Jj/K £kfiw/i Artide 13 ) 
Differences from the National Code: 

The providons are amilar to the national code but are enhanced by requiring a specific program of testing 
and inspections of critical structural items to be developed by the Structural Engineer of record. 

Changes- from the Fifth Edition of the Massachusetts State Building Code: 

This chapter has been clarified to identify critical inspection procedures for structural materials and 
processes and fiirther serves to clarify some of the responsibilities of reg^ered profesdonals under 
construction control (5th edition section 127 - 6th edition section 116) 

CHAPTER 18 - FOUNDATIONS AND RETAINB^G WALLS 

(Fifth Edition Ai^dt 12 ) 
The proviaons of Chapter 18 were reviewed and further developed by the Ceotechriical Advisory Committee 
w^ose make-up is defined in the forward of the code. The following is a detailed analysis of the their work 
provided by members of the committee. i 

(1 ) For the Sixth Edition, the fonnat, terminology and provisions of BOCA ( 1 993) were usually adopted; 
the technical provisions are generally consistent with those in the Fifth Edition of the Massachusetts State 
Building Code, unless noted in the User's Guide. The User's Guide indicates the spedfic locations of 
significant changes -wttch have been incorporated in the Sixth Edition, together with comments and backup 
information. Such changes include: 

(a) Technical changes to existing provisions, which may or may not be consistent with BOCA. 

(b) New pmvigftm; which have been adopted by the State Board of Building Regtilations and 
Standards ance issuance of the Fifth Edition (1 990). 

(c) New provision«; which are included in BOCA, but were not contained in the Fifth Edition. 

(d) New provisions \n*ich are introduced in the Sixth Edition. 

All references her«an to BOCA are to the BOCA National Build'mg Code, 1993 (Twelfth Edition). 

1802.0 FOUNDATION INVESTIGATIONS 

1802 1 Where retitiireri- 1202.1 (Fifth Ed.) retained; BOCA requiremeiits for specific number of borings 

for building area not adopted. 

1802M SeiCTnir investigation- criteria established for field investigation/report on evaluation of 

"liquefaaion" potential, with reference to Seaion 1805.3 (1612.3 in the Fifth Ed.) 

1 802. 2 Soil samplf^ and horinp report?;- provisions of 1202. 2 (Fifth Ed.) retained, which require that 

copies of the results be filed with the code official. 

1803.0 SOIL BEARING TESTS 

18030 Soil bearing tf<a';- all of 1203.0 fFifth Edt retalfaiCk-in lieu of 'Soil test procedure*. 



780'CMR - Sixth Edition 



' 780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

THE MASSACHUSETTS STATE BUEJ)ING CODE 

1804.0 LOAD BEARING VALUE OF SOILS 

iSfM 1 Soil;; repon: 1201.3.2 (Fifth Ed.) provisions retained; BOCA list of requirements for prepared 

fill in repon are not included. 

1 RfM 7 <;ati<rf?rtnTv fonndati on materials" 120 1 .2 (Fifth Ed.) retained. 

iRfM 1 Pres,.mPtr^ ln»r^ h^arinp values" 1201.3 (Fifth Ed.) provision for approval of higher bearing 

pressures retained, and 1201.3.1 reference to Appendix for guidelines for classificauon of bearing ^ 

materials retained. . 

TABLE 18043 ADowable Bearing Pressures, has been retained from the Fifth Ed. (TABLE 1201) with 

some minor modifications. 

The values in BOCA (TABLE 1804.3) are considered inappropriate for Massachusetts. 

12013.2 (Fifth Ed.) provisions for compaaed fill below foundations and for field control are retained. 

lRn4 4 Tiohtwwpht iffnicTures: 1201.3 (Fifth Ed.) retained. 

1805.0 ALLOWABLE FOUNDATION LOADS 

IROS? fsonranacitv Provision added, which allows up to 33% increase in bearing pressures for soil 

types indicated, for load combinations which include wind or seismic. TWs provision applies to all 

foundation types. A similar provision in the Fifth Ed. (1206.2) that applied" only to footings has been 

deleted. 

1805"; T.inuefactinn- These provisions have been transferred in their entirety from 1 1 13.8 (Fifth Ed,). 

18054 Vertical pre5;!wre" 1204.4 (Fifth Ed.) retained. 

18055 Settlem ent analvsiv 1204.5 (Fifth Ed.) retained,' 

180S 6 Di<miTbaTice of hearinp soils" 1204.6 (Fifth Ed.) retained. 

1805 7 Roclc foundations- provisions added for increased bearing pressures, based on load tests (per 
BOCA). 

1806.0 DEPTH OF FOOTINGS 

1 806 1 Frost Protection" modified to appfy to structures larger than 100 sq. feet area or 1 feet high (per 
BOCA). 

1 806 7 Tiolated footing" The criteria for relative position of soil-bearing footings changed, consistent 
with BOCA (See 1205.2, Fifth Ed.). 

1806 3 Depth of ^^iread footing';" 1205.3 (Fifth Ed.) retained. 

1807.0 FOOTING DESIGN 

1807 1 Design load';- 1206 1 (Fifth F.d) retained. 
1807 4EccenTTiclnaf1r 1206.6 (Fifth Ed.) retained. 

1810.0 CONCRETE FOOTINGS 

1810.2.1 Footing seismic ties- Requirements for seismic ties between footings for Category D structures 
have been added conastent with BOCA (1810.2. 1). These proviaons differ from BOCA in that the ties 
are to be designed for a force equal to 10% of the larger column dead load plus Uve load in lieu of "a 
force equal to 25% of the eflfectrve peak velocity-related acceleration (A,) times the colunm dead load 
phis live load". Under 1 1 13.6.9 (Fifth Ed.) interconnections of footings with ties were not specifically 
required, but were to be considered in the design. 

1812.0 FOUNDATION WALLS 

1812.2 Definition'; and 1817 "^ Minimum thickness" definitions have been added and requirements 
modified from those of 1222.2 (Fifth Ed.); also. Table 1812.3.2 has been changed. 
1812.6 Lateral 'aahilitv" there is an added reference to 1825.0 for seismic design requirements. 
1814.0 MAT RAFT AND FLOAT FOUNDATIONS 

1814.2 Senlement analvsi':" the requirement for a settlement analysis (121 1.2, Fifth Ed.) is retained. 
1815.0 PIER FOUNDATIONS 

1815 1 rrt^npral- Thp^ definitions, as ^ven in 1212.1 (FiftliEd) are retained but with modifications: 1) 
"and piles installed by the hollow stem auger method" is deleted (refer now to 1820.2) and 2) "other 
non-circular foundation elements" are now included. 



C\fR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS' GUIDE 

1815 t? 1 Foiinrfarion tif «:■ the provisions for interconnection between piers are consistent with BOCA 
( 1 8 1 5.2). except thai the ties are to be deagned for a force equal to 1 0% of the larger cohjmn dead load 
plus live load in lieu of "a force equal to 25% of the effective peak velocity-related acceleration (A») 
times the column dead plus live load". (This in effect retains the requirement in 1 1 13.6.9 (Fifth Ed.) 
for interconnection of piers, with a nmilar magnitude of design force in the tie, which is more 
conservative than BOCA) 

1815.2.2 SeiCTTiic rcinforcemenr these new provisions are similar to those now required for cast-in- 
place concrete piles (see 1 820. 1 .2. 1 ). The provisions in 1 820. 1 .2. 1 which were adopted by BOCA are ' 
consistent with the model code provisions issued by FEMA {NEHRP Recommended Provisions for 
Seismic Regulations for New Buildings, 1994 Edition, prepared by the Building Sdsmic Safety Council 
for the Federal Emergoicy Management Agency). Although BOCA does not require seismic 
reinforcement for piers, it is noted that the FEMA guidelines recommended that the same seismic 
provisions apply to drilled piers or caissons. Therefore, such provisions are included herein. Note that 
the "minimum pier desgn cross sectional area" is defined as the minimum section area, as determined 
by the allowable design stresses, even though the actual pier section may be larger. 
1815.2 "% Pier cap connection- the proviaons are ^milar to those now required for all concrete piles 
(1816.1 1.1) which are conastent with the FEMA model code provisions (see 1815.2.2 for reference). 
Although BOCA does not require the cap connection for piers, such provisions are included herein for 
consistency with the FEMA recommendation. 

1815 2 4 Alternative detailinf This provision allows ahematives to the code-specified minimum 
reinforcing, similar to the BOCA provision for concrete piles in 1816.11.1. 

1815 J through 1 8 1 5 11 • The existing provisions, in 1212.2 through 1212.10 (Fifth Ed.) are retained; 
they are considered more complete and appropriate for Massachusetts. 

1816,0 PILE FOUNDATIONS 

1816 3 Pilff hffnrfinp «;w<miir c1g<ngn- The special provisions of BOCA (1816.3) were adopted for pile 
reinforcement below buildings assigned to Seismic Performance Cat^ory D; tins was not required in 
the Fifth Edition. It is noted that this is conastem with the FEMA document referenced in 18 15.2. 
1816.4 ProTection of pile material?;- the existing provisions, 1213.3 (Fifth Ed.) are retained; they are 
considered more complete and appropriate for Massachusetts. 

1816 5 Latenii aippon- 1213.4 (Fifth Ed.) is retained; reference to "fluid soil" is deleted. 

1816 7STahi1itv- 1213.6 (Fifth Ed.) is retained. 

1816.8 Structural integrity 1213.7 (Fifth Ed.) is retained. 

1816 10 Sp1iee<;- 1213.9 (Fifth Ed.) retained, including requirement for all pile splices to "devdop at 

least 50% of the c^adty in bending". In addition, the BOCA provisions for design requirements for 

splices located in the upper ten feet of the embedded pile are adopted. 

1816 111 Pile cap !;eismic connection: The spedal provisions of BOCA (1816.11.1) were adopted for 

seismic connection of all concrete piles to the caps (not required m Fifth Ed.). Note: TIus is a new 

requirement, utidi may have an economic impaa on pile fbimdaiions. 

1816 11.2 Pile foundation seismic ties- The provisions for interconnection between pile caps are 

consistent with BOCA (1816.1 1.2), except that the ties are to be designed for a force equal to 10% of 

the larger column dead load plus live load in lieu of "a force equal to 25% of the effective peak velodty- 

rdated acceleration (A,) times the column dead plus live load". (This in effen retains the requirements 

in 1 1 13.6.9 (Fifth Ed.) for interconnection of pile caps; the magnitude of the design force in the tie is 

more conservative than BOCA) 

1816 13 Inspection- The more detailed requirements of 1213.12 (Fifth Ed.) are retained. 

1816 18 Pile Heave- The more detailed requirements of 1213. 17 (Fifth Ed.) are retained. 
1817.0 ALLOWABLE PILE LOADS 

1817 1 through 18171- The existing provisions in 1214.1, 1214.2 and 1214.3 (Fifth Ed.) including the 
requirements for determination of allowable load by the driving formula, fiiction formula in clay and 
for jacked piles, are retained. (Note; The description of the design criteria for ftiction piles in day has 
been modified for clarification. 

1817 4 Compression load te<T- The existing provisions in 1214.4 (Fifth Ed.) are retained; they are more 
detailed and appropriate for local conditions. 

1817 6 Lateral load t est; and 1817 7 Tension Load te5;t';- The more detailed existing provisions,ofl214 6 
and 1214.7 are retained. 



780 CMR - Sixth Edition 



' 780 CMR; STATE BOARD OF BUE-DING REGULATIONS AND STANDARDS 

THE MASSACHUSETTS STATE BUILDING CODE 

1S17 R Bearinf canacrtv The existing provisions of 1214.8 (Fifth Ed.) are retained. 

1 8 18.0 STRUCTURAL STEEL PILES 

1R1R2 Allowable stress- The existing provisions in 1215.4 (Fifth Ed.) are retained, including the limit 
of "35% of the minimum specified yield strength or 12,600 psi." The limitation on stress is a result of 
driveability considerations. 

1818 3 Pile cap seismir. rnnnection: The special provisions of BOCA were adopted for conneaion of , 
steel pfles to the caps for buildings assigned to Seismic Category D, (not required in the Fifth Edition). 

1 8 19.0 CONCRETE-FILLED STEEL PIPE AND TUBE PILES 

1819 2 Allowable streg;- A distinction is made between top-driven and mandrel-driven piles; 

- In 1819.Z1, the existing provisions m 12163 (Fifth Ed.) for stress limits due to driveability 
considerations are retained for top-driven piles. 

- In 1819.2.Z the Wgher allowable limits in BOCA are aUowed for piles driven by mandrels •w^ich 
effectively transmit the' driving stresses to the bottom of the pile. 

1819 ".1 'Pile cap seifmic connection : The special provisions of BOCA were adopted for pile 
reinforcement and connection to the cap for all piles (not required in the Fifth Ed.). 

1819 5 Plarinc concrete- the existing provisions in 1216. 1 (Fifth Ed.) for alignment criteria of the steel 
pipe before filling with concrete have been deleted; the reason is that other pile types wluch cannot 
be similarly inspeaed are not subject to such requirements, and such requirements are not generally 
necessary. 

1820.0 CAST-IN-PLACE CONCRETE PILES 

1820 T 1 Material- The existing rcqirirement, 1217.1 (Fifth Ed.) for minimum concrete strength is 
retained (le. 3000 pn in lieu of 2500 psi in BOCA) 

1820 1.2 1 Seimiic reinforcement: The special requirements of BOCA (1820.2J2.1) for pile 

reinforcement and connection to the cap are adopted (Not required in Fifth Ed.). Note- There are 

different requirements for bufldings assigned to Seismic Performance Category C and D. 

18201.3TTT^llation- the installation requirement for all cased, concrete-filled piles are given here, and 

are referenced in 1820.4 J JL3 and 1820.5.3. 

1 S20.2 Aufered imcased piles- The provisions are now in a new. separate section; this pile type was 

previously (Fifth Ed.) induded in 1212.0 Pier foundations. The provisions have been modified, and are 

not entirely consistent with BOCA (1820.2). 

Note- 1820.2.8 InsmimenTation has been added; it requires that the auger rig be equipped with data 

logging equipment to automadcaliy record vital information during installatioa 

1820 4 Pre ssure-injected footing';- AH provisions are those contained in the REVISIONS to 1217.0 
(Fifth Ed.) whjdi were adopted since issuance of the Fifth Edition (1990). The rcNTsions, together with 
an exten^ve Commentaiy, were prepared by the Geotechnical Advisory Committee and presented at 
a Public Hearing on November 30, 1993, and were subsequently approved and filed by the State Board 
of BuilcUng R^ulations and Standanis. 

1820.5 Cased ponrtd roncrete piles- The existing provisions in 1217.5 (Fdth Ed.) have been retained, 
including the limitation of 1,600 psi on deagn stress. 

1820.6 Small diamfner promed piles- These provi^ons for grouted cast-in-place piles, less than 12 
inches diameter, are not included in BOCA (1993). The requirements of 1217.2 (Fifth Ed.) have been 
re-organized and retained. 

1821.Q PRECAST CONCRETE PILES 

1821.1 through 1871 -t-Th» BOCA provisions are generally adopted. In 1821.33, the formula for 
design compressive stress varies slightly from that in 1218.3 (Fifth Ed.) i.e., a smaller deduction is 
required for the prestress. The 1600 psi limitation on design stress in the Fifth Ed. has been retained. 

1821 3 *> Pile can seismic connection- The special providons for seismic conneaion (per 1 8 16. 1 1 ) 
also allows for extension of the pile reinforcing strand mto the cap, except for buildings assigned to 
Seismic Performance Cat^ory D. 

1S21 3 6 Snirai seismic reinforcinp- Special BOCA provisi^asJbr the length of spiral reinforcement for 
buildings assigned to Seismic Performance Category D are adopted. Also, the requirements for ties in 
the upper two feet of pile have been added, to be consistent with FEMA. 



!0 



780 CMR - Sixth Edition 



' 780 CMR:. STATE BOARD OF BUD-DING REGULATIONS AND STANDARDS 

USERS' GUIDE 

1822.0 TIMBER PILES 

1S22 1 through 1R??4- All provisions are those contained in the REVISIONS to 1219.0. which have 
been adopted since issuance of the Fifth Edition (1990). 

The Reviaons, together with an extensive Conuneniaiy, were prepared by the Gcotechnical Advisoty 
. Committee and presented at a Public Hearing on November 8. 1994, and were subsequently approved 
and filed by the State Board of Building Regulations and Standards. 

1824.0 CONCRETE-FILLED STEEL PIPE WITH STEEL CORE CAISSONS 

1824.2 Rock socket: The provisions for the rock socket design have been revised to require that the 

perimeter bond stress be determined by studies for each installation, but in no case shall the bond stress 

exceed 200 psL Also, the minimum outside diameter has been reduced from 24 to 18 inches, consistent 

with BOCA. 

1824. J Seiwrac reinforcemenf It is required that all caissons have seismic reinforcement, per 1 820. 1 .2. 1 

(not in Fifth Edition) 

1824 6 Allowable stress- BOCA proviaons adopted, without the stress limits on concrete and steel as 

contained in 1221.8 (Fifth Ed.); such limits do not apply, since the caisson is not driven. 

1824.8 Precautions- The requirement for plumbness (1221.6 Fifth Ed.) has been deleted. 

1825.0 RETAINING WALLS 

1825.2 Design- Design requirements to resist seismic loads have been added. 

CHAPTER 19 - CONCRETE 
(/^ £aau?/: Artide 15) 
DifTcrences from the National Code: 

The provisions are essentially the same as the national code. 

Changes from the Fifth Edidon of the Massachusetts State Building Code: 

Sdsmic roquirements for reinforced concrete have been amended to reflect current design and construction 
practices consistent with expected seismicity of the region. 

CHAPTER 20 - UGHTWEIGHT METALS 
(pjfKififfi&w Article 19) 
DilTerences from the National Code: 

The provisions are the same as the national code. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 
No changes from 5th edition other than updating of referenced standards. 

CHAPTER 21 - MASONRY 

(pySi EiStion Anode 14) 
Differences from the National Code: 

Tne provjaons are essentially the same as the national code with the exception of reinforcing requirements. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

Seismic requirements for masonry have been amended to reflect current design and construction practices 
consistent with expected seismicity of the region 

CHAPTER 22 -STEEL 

{Fifth EtSnon AT6de 18) 
DifTercnces from the National Code; 

The provisions are essentially the same as the national code with the exception of the inclusion of the 
provisions of the "Interim Guidelines for Steel Moment Frame Struaures" (FEMA 267 - August 1995). 



780 CMK - Sixth Edition // 



780 CMR; STATE BOARD OF BUIU3ING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 
Changes from the Fifth Edition of the Massachusetts State Building Code: 

Seismic requirements for steel have been amended to reflert current design and consiniaion practices 
consistent with expeaed seismidty of the region. 

ARTICLE 23 -WOOD 

{Fyih Edinon Artide 17) 

DifTerences from the National Code: 

The provisions of Chapter 23 are essentially the same as the national code with the exception of the 
inclusion of text for the use of native lumber. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

Seismic requirements for wood construction have been amended to reflect current de^gn and coitstruction 
practices consistent with expeaed sdstiucity of the region. 

CHAFIZR 24 - GLASS AND GLAZING 

(Fifth Edition Artide 22) 

Differences from the National Code: - . 

Chapter 24 reflects the provisions of the 1996 national building code, and is different only to remain 
compatible with Massachusetts general law. 

Changes from the Fifth Edidon of the Massachusetts State Building Code: 

The requirements for ^ass and glazing have been relocated in the Sixth Edition of the code, and have been . 
modified to reflect advances in tedmology. 

CHAPTER 25 - GYPSUM BOARD AND PLASTEai 

(Fyih Edition Artide 16) 
Differences from the National Code: 

Chapter 25 is entirely compatible with the national code. . 

t 

Changes from the FifA Edidon of the Massachusetts State Building Code : 

The requirements for gypsum board and piaster have been relocated in the Sixth Edition of the code, and 
have been modified to reflea changes in technologies. 

CHAPTER 26 - PLASnC 
(Pjfift JSfaion Artide 20) 
Differences from the National Code: 

Chapter 26 is entirdy compatible with the national code. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

The requirements for plastic have been relocated in the Sixth Edition of the code, and have been modified 
to reflect changes in technologies. 

CHAPTER 27 - ELECTRICAL WIRING AND EQUIPMENT 

(Fifth Edition Artide 27) 
Differences from the National Code: 

Chapter 27 has been ddeted firom the national code in its entirety. Electrical wiring and equipment is 
regulated by a separate state agency, and is made part of the code by reference. 

Changes from the Ffth Edition of the Massachusetts SutcBuilding Code: 

See comments above. 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS* GUIDE 

CHAPTER 28 - MECHANICAL S\'jrEMS 

{FlfUt Edhion - Article 25) 
DifTerences from National Code: 

Chapter 28 of the Sixih Edition of the code contains Section 2812.0 which sets forxh requirements for 
power venters and acknowledges other jurisdictions which also r^ulate the installation of power venters 
(Board of Fire Prevention Regulations for oil-5red appliances; see 527 CMR and the Plumbing and Gas 
Board for gas-fired appliances; see 248 CMR). 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

Explicit construction requirements for boiler rooms have been removed fi-om the Sixth Edition of the 
Massachusetts State Building Code. 

CHAPTER 29 -PLIMBE^G SYSTEMS 

(Fj^ EdMon - Artide 28) 
DifTerences from National Code: 

Massachusetts plumbing and gas requirements are controlled by the Plumbing and Gas Code - 248 CMR 
and promulgated by the Plumb'mg and Gas Board and such requirements are typically not controlled by 
the State Building Code. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

Chapter 29 now also identifies Massachusetts laws and r^ulations that involve licensed refiigeration 
teclmidans and pipefitters. 

ARTLCLE 30 - ELEVATORS 

(/jfifc jEaaiOTi - Artide 2Q 
Differences from National Code:. 

Massachusetts elevator requirements are controlled by the Elevator Regulations - 524 CMR, prorhulgated 
by the Board of Elevator Regulations and such requirements are typically not controlled by the State 
Building Code. ' 

Changes from the Fifth Edition of the Massachusetts State BuQding Code: 

The detailed requirements set forth in the Fifth Edition of the State Building Code have been removed to 
ensure clarification of the jurisdiction of both the Board of Building R^ulations and Standards and the Board 
of Elevator Regulations. 

CHAPTER 31 - SPECIAL CONSIRUCllON 

{r^ Edhion Artides 6, 21, 19 and 30) 
Differences from the National Code: 

Chapter 3 1 is essentially the same as the national code, Hov/ever, substantive changes have been made 
totheFloodReastant ConstiuctionprovisionsofSection3107.0. Additional changes have been made to 
remain compatible with Massachusetts general law and regulation. 

Changes from the Fifth Edition of the Massachusetts State Building Code : 

. Requirements in Chapter 3 1 were scattered about the pages of the Fifth Edition. They have been organized 
in a more logical fashion in Chapter 3 1, and have been modified to reflect advances in technology. Also ' 
see comments above. 

CHAPTER 32 - CONSTRUCTION IN THE RIGHT-OF-WAY 
{FyOt EtEdon Artides 7 and 30) 
Differences from the National Code: 

Chapter 32 is essentially the same as the national code, changed only remain compatible with Massachusetts 
general law and regulation. 



780 C\fR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 
Changes from the Fifth Edition of the Massachusetts State Building Code: 

Requirements in Chapter 32 were scanered about the pages of the Fifth Edition. They have been organized 
in a more logical fashion in Chapter 32. and have been modified to reflea advances in technology. 

CHAPTER 33 - SITE WORK, DEMOUnON AND CONSTRUCTION 

(fifth Edition Artide 30) 

DifTerences from the National Code: 

Chapter 33 is essentially the same as the national code, changed only remain compatible with 
Massachusetts general law and regulation. 

Changes from the Fifik Edition of the Massachusetts State Building Code : 

Requirements in Chapter 33 have been organized in a more logical fashion and have been modified to 
reflea advances in technology. 

CHAPTER 34 - REPAIR, ALTERATION, ADDITION AND CHANGE OF USE 
OF EXISTING BUILDINGS 

{Fifth EtSdon Artide 32) 
Differences from the National Code: 

Chapter 34 has been substantially modified from the national code in terms of technical content and formaL 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

The requirements for the repair, alteration, addition and change of use for existing buildings have been 
motfified from the proviaons of Artide 32 and presented in a more logical feshion. Section 3408.0 presents 
structural requirements for existing buildings that are new to both Massachusetts and the national code. 
Additionally, Chapter 34 differs from the Fifth Edition of the code in several ways, induding: 

(1) Guidance on unsafe lighting and/or unsafe ventilation is now presented in Chapter 34; 

(2) A definition for "substantial renovation" is provided; 

(3) Emphasis of the need for an evaluation of existing buildings that fall under the requirements of 
"controlled construction" is provided; ' 

(4) Requirements for continuation of the same use group or a change to a use group resulting in a 
change in Hazard Index of one or less have been combined; 

(5) Clarification as to v**en Fire Protective Systems are required, is provided; 

(6) Energy provisions for any existing building undergoing building permittable work are provided 
and clarified and will fiirther diange (there will be an impaa on "replacement windows" on Januaiy 1, 
1999) - see the front piece to Chapter 13 which is also repeated as the fi-ont piece to Appendix J; 

(7) Structural requirements for existing buildings are now delineated; 

J (8) "Historic Buildings" requirements are now found in Chapter 34, whereas in the Fifth Edition of 

the Code, "Historic Build'mgs" criteria was found in Article 6. 

CHAPTER 35 - MANUFACTURED BUILDINGS, MANUFACTURED BUILDING 
COMPONENTS AND MANUFACTURED HOUSING 
{Fm Edsdon - Artide 33) 
DifTerences from National Code: 

Chapter 35 in concept and specific requirements is unique to Massachusetts. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

Chapter 35 of the Sixth Edition of the Sute Building Code differs from Article 33 of the Fifth Edition of 
the Code in several ways, including: 

(1) A definition of the "Installer of Manufactured Homes" has been created, and; 

(2) Construaion documents requirements have been clarified™ and; 

(3) The homeowner exemption for the acquiring of the building permit has been removed and it is now 
necessary for a licensed construction supervisor to apply for the permit, oversee site, footing and 
foundation work and if the licensed construction supervisor is also an "Installer of Manufactured 
Homes", the license holder may/shall also oversee installation of the Manufactured Home onto the 
foundation system and ensure proper tying of the various modular units together before turn over to the 

^-' 780 CMR- Sixth- Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS' GUIDE 

Homeowner, otherwise in addition to the license holder being involved, a feaory certified "Installer of 
Manufactured Homes" shall be present to ensure proper installation and bolt-up of the Manufactured 
Home before turn over to the Homeowner. 

CHAPTER 36 - ONE AND TWO FAMILY DWELLING CODE 

(Fifth B&ion - Artide 34) 
DifTerences from National Code: ' 

Chapter 36 utilizes the general format of the CABO ONE AND TWO FAMILY DWELLING CODE, 1995 
EDITION, but is significantly altered throughout to reflect Massachusetts requirements. 

Changes from the Fifth Edition of the Massachusetts State Building Code: 

Chapter 36 of the Sixth Edition of the State Building Code differs from Article 34 of the Fifth Edition of 
the Code in a number of ways, including: 

(1) In the Definitions section, DMR Group Homes are defined in tetnis of the Residential Use they 
most likely resemble (R-4, R-3, R-2 or R-1, as appDcable), and: 

(2) the Uniform Snow Load Maps have been clarified by city or town, and; 

(3) attached garage fire separation from the main house has been redefined, and; 

(4) mechanical ventilation of bathroom and toilet rooms is now required, and; 

(5) clarification of the venting of special spaces, such as roofs, eaves, etc. reflects the requirements of 
the main body Sixth Edition Code, and; 

(6) attic access between conditioned and unconditioned space is explicitly required to be weather- 
stripped and puD-down doors must dose tightly, and; 

(7) the fire protections systems requirements for one and two &mi]y dwellings has been refined to 
reflect die requir e m ents ofMassacfausetts and NFPA-72, (photo-dectiic smoke detectors and the battery 
backup of an angle station and multiple station smok& detectors are addressed) and; 

(8) energy conservation requirements, although not yet significamly changed (thermostau are now 
required on every story that contains heated and/or cooled space)l, will change on March 1, 1998 to 
reflea requirements of Massachusetts and the. CABO Model &iergy Code, 1995 version - see the front 
piece to Chapter 13 which is also repeated as the fitjnt piece top Appendix J, and; 

(9) Span tables have been updated and expanded , and; 

(10) The fireplace, chimney and solid fiid-buming appliance requirements , have been updated to 
Massachusetts requirements, and; 

(1 1) Recognition of the multiple jurisdictions and regulations pertaining to the design aiul installation 
of comfort heating appliances has been placed in Chapter 36; Le., in addition to the State Building Code 
(780 CMR), the Plumbmg and Gas Code (248 CMR) and the Fire Prevention Regulations (527 CMR) 
also are identified, and; 

. (12) Solar system criteria is also found in Chapter 36. 

DESCRIPTION OF APPENDIX J 

Appendix J, "Energy Conservation for Low-Rise Resdential Buildings" is currently unique to 
Massachusetts and is referenced from Chapter 36. Appendix J carries forward the curreni Ftfth Edition 
energy conservation requirements with minor changes, induding the requiring of thermostats on every 
story containing conditioned space - Note that Appendix J will change (See the front piece to Chapter 13 
which is repeated as the front piece of Appendix J). 

DESCRIPTION OF APPENDIX K 

Appendix K , "Floor Protector Thermal Conduaivity Calculations" is unique to Massachusetts and 
supplements the solid fiiel-buming section of Chapter 36, Section 3610. 

DESCRIPTION OF APPENDIX L 

Appendix L, "Schedule of Fees" is unique to Massachusetts and defines initial and renewal licensing fees, 
initial and renewal Home Improvement Contraaor registration fees and assodated Guaranty Fund fees. 
Appeals Board fees, building permit fees, and existing "building, pCTTddic inspection fees. 



780 CMR - Sixth Edition J5 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

PART III - CROSS REFERENCE BY ARTICLE/CHAPTER 



CAUTION 

This cross-index is meant as a transition tool for users of the Sixth Edition of the Massachusetts State 
Building Code. It is not meant as an authoritative source for all changes dther from the BOCA National 
Building Code or the Fipi Edition of the Massachusetts State Building Code. Always refer to the aaual 
code documents for definitive requirements. 

The Table in Part III has been developed for those who are accustomed to using the Fifth Edition and 
previous editions of the Massachusetts Sute Building Code. The first column lists article and primary 
section numbers in the Fifth Edition; the second column gives the article and section number in the Sixth 
Edition.Thc balance of the articles in the Fourth Edition have an equivalent article in the Fifth Edition. 



Fifth Edition 
Table of Contents 


Sixth Edition | 
Anide/Chapter Cross Reference | 


Article 1 - ADMINISTRATION AND 
ENFORCEMENT 


Chapter I - ADMINISTRATION 

(Substantial portions of chapter are entirely unique 
to Massachusetts) 


100.0 Scope 


101.0 Scope 1 


101.0 AoplJcabilitv 


102.0 Applicabilitv 


102.0 Ordinarv repairs 


1 1 0.3 Exempdons (Application for permit) 


103.0 Installation ofservice repairs equipment 


110.0 Pennit Application 


104.0 Maintenance 


103.0 Maintenance 


105.0 Change in existing use 


102^ Applicability to existing buildings 
110.1 Pennit application 


106.0 Alterations and repairs 


102.5 Applicablli^ to existing buildings 
110.1 Pennit application 


107.0 Building department 


1 05 .0 OfBce of Ae inspeaor of buildings or 
btiildin? commissioner 


108.0 Duties and powers of the building oEBcial 
and state inspector 


1 06.0 Duties and powers of the building ofBcial 
107.0 Duties and t)Owetsofthe state inspector 


109.0 Rules and resulaiions 


108.0 Rules and regulations 


110.0 Aoproval 


109.0 Approval 


111.0 Inspection 


115.0 Inspection 


112.0 Riahtofentrv 


115.6 Genera! (Inspection) 


113.0 Application for permit ' 


1 1 0.0 Application for permit 


114.0 Permits 


Ill.O Permits | 


115.0 Conditions of permit 


113.0 Conditions of permit 


. 116.0 Demolition of structures 


1 1 2. Demolition of structures 


1 17.0 Moved structures 


102.56 Moved Strucnires 


118.0 Fees 


114.0 Fees 


119.0 Certificate of use and occupancy 


120.0 Certificate of occupancv 


120.0 Postinc structures 


120.5 Postine structures 


121.0 Violations 


118.0 Violations 


122.0 StoiJ-work order 


1 19.0 Stop-work order 


1 23 .0 Unsafe structures 


1 2 1 .0 Unsafe structures 


124.0 EmerEeno.' measures 


121.0 Unsafe structures 


125.0 Reserved 




126.0 Board of Appeals 


122.0 Board of Appeals 


127.0 Construction Control 


1 1 6.0 Registered ardiitectural and professional 

eneineerine services-Construction Control 


1 28.0 Construction Materials Safety Board 


123.0 Construction Materials Safetv Board 


129 Acnvities requirins; licenses 


108 Rules and reculations 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS* GUIDE 



Fifth Edition 
Table of Contents 


Sixih Edition 
Article/Chapter Cross Reference 


130.0 Fire-Prevention-Fire Protection Board 


124.0 Fire-Prevention-Fire Protection Advisoi>- 
Conunittee 


1 3 1 .0 Structural Peer Re\^e^v Adwor^' Board 


125.0 Structural Peer Review Ad\TSor\- Committee 


140.0 Validity 


104.0 Validity 
117.0 Workrnanship 


Article 2 - DEFTNITIONS AND 
CLASSmCATIONS 


Chapter 2- DEFINITIONS 

(Additional definitions are provided in 
appropriate chapters) 


200.0 General 


201.0 General 


201.0 General definitions 


202.0 General definitions 


Articles- USE GROUP 

CLASSIFICATION 


Chapter 3 - USE OR OCCUPANCY i 


300.0 Genera] 


301.0 General 


301.0 Classificanon 


302.0 Classification 


y 

302.0 Use croup A. assembly uses 


303.0 Assembly use erouTK 


303.0 Use group B. business uses 


304.0 Business use groups 


304.0 Use group E educational uses 


305.0 Educational use groups 


305.0 Use eroup F. &ctorv and industrial use 


306.0 Factors and industrial use groups 


306.0 Use croup K high hazard uses 


307.0 Hirfi hazard use groups \ 


307.0 Use croup L institutional uses 


308.0 Institutioiud use grout>s 


308.0 Use croup M. mercantile uses 


309.0 Mercantile use croups 


309.0 Use croup R. residential uses 


310.0 Residential use croups 


310.0 Use croup S. storace tises . 


3 1 1 .0 Storace use groups 


3 1 1.0 Use croup U, Utility and miscellaneous uses 


312.0 Utility and miscellaneous use croups | 


3 12.0 Doubtful use classification 


302.0 Classification 


313.0 Mixed use and occupancy 


313.0 ML\ed use groups , 


Article 4 - TYPE OF CONSTRUCTION 
CLASSmCATION 


Chapter 6 - TYPES OF CONSTRUCTION 


400.0 General 


601 .0 General 1 


401 ConsTTuction classification 


602.0 Construction classification | 


402.0 Tvpe 1 construction " 


603.0 Tvpe 1 construction 1 


403.0 Tvpe 2 construction 


603.0 Tvpe 2 constnicnon 


404.0 Tvpe 3 construction 


604.0 Tvpe 3 construction 


405.0 Tvpe 4 construction 


605.0 Tvpe 4 construction 


406.0 Tvpe 5 construction 


606.0 Tvpe 5 construction , 


Article 5 - GENERAL BUILDING 
LIMITATIONS 


Chapter 5 - GENERAL BUILDING 
LIMITATIONS 


500.0 General 


501.0 General 
562.0 "Definitions 


501.0 General area and heicht limitations 


503.0 General area and height limitations 


502.0 Area modifications 


506.0 Area modifications 


503.0 Heicht modifications 


504.0 Heicht modifications 


504.0 Unlimited areas 


507.0 Unlimited areas | 


505.0 Existing buildines 


505.0 Mezzanines | 


506.0 Street encroachments 


3202.0 Street encroachments 


507.0 Permissible street projections 


3203#^,JEermissible street encroachments 


508.0 Permissible vard and coun encroachments 


3202.0 Street encroachments 


509.0 Special and temporary projections 


3204.0 Special and temporary projections 


5 1 0.0 Awnines and canopies 


3205 Au-nincs and canopies 


511.0 Temporaiv structures 


3 1 0-J Temporarv structures 


512.0 Phvsicallv handlcaoDed and aced 1 Chnoier t ! 1 



780 CMR - Sixth Edition 



780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
7nE MASSACHUSETTS STATE BUILDING CODE 



; Fifth Edition 
; Tabic of Contents 


SLak Edition 
Article/Chapter Cross Reference || 


■^13.0 Special historic buildines and districts 


3409.0 Historic buildines 


j Article 6 - SPECIAL USE AND OCCU- 
PANCY REOUIREMENTS 


Chapter 4- SPECULUSEAND | 
OCCUPANCY 1 


1 600.0 Genera] 


401.0 General 


1 60 1 .0 Covered niall buildines 


402.0 Covered mall buildings 


1 602.0 Hieh-rise buildines 


403.0 Hieh rise buildines 


J 603.0 HPM use facDities 


416.0 HPM facilities 


604.0 Membrane stnictures 


3 1 03 .0 Membrane structures 


605.0 Mezzanines 


505.0 Mezzanines 


606.0 Openw-ells 


404.0 Atriimts 


607.0 Open parldne earaees 


406.0 Open parkine earaee 


608.0 Private earaees 


407.0 Private earaees 


609.0 Public earaees 


408.0 Public earaees 


610.0 UseeroupI-2 


409.0 Use eroup 1-2 


611.0 UseeroupI-3 


410.0 Use eroup 1-3 


612.0 Bleachers, grandstands and folding or 
1 telescopic seating 


1013.0 Grandstands 


1 613.0 Motion piaure projections rooms, screening 
1 rooms and sound staces 


4 1 1.0 Motion picture projections rooms, screening 
rooms and sotmd staees 


614.0 Rooftop heliports 


1511.0 Rooftop heliports H 


615.0 Staees and Platfoirns 


412.0 Staees and platforms H 


6 1 6.0 Airpon traffic control towers 


414.0 Airport traffic control towers | 


617.0 Combustible dust, gain processing and 
stoiaee 


307.4 Use group H-2 stiucmres/ 418.0 


6 1 S . Explosion hazards 


307.3 Use eroup H- 1 structures/ 418 


619.0 Flanunable and combustion liquids 


307.4 Use eroup H-2 struciuresy 418 


620.0 Liquefied petroleum eas facilities 


307.4 Use eroup H-2 structures' 418 


621.0 Mobile unit 


420.0 MobUeunit 


622.0 Paint spravine and sprav booths 




62j.O Radio and telex-ision towers 


3108.0 Radio television towen 


624.0 Radio and television antennae 


3109.0 Radio television antennas 


625.0 Swrmmine t«3ols 


421.0 Swimttiin? pools 


626.0 Temporary structures 


3104.0 Temporary.' structures 


627.0 Fire prevention codes 


Appendix A 


628.0 Special permits and certificaies of fimess 


111.0 Permits 

3204.0 St>ecial and temoorarv proirctions 


629.0 Existine buildines 


422.0 E-xistine buildines/ Chaoter 34 


630.0 Amusement parks 


413.0 Special amusement buildinc; 


63 1 .0 Group residence 


423.0 Group residence 


632.0 Nursine homes...etc. 


409.0 Use eroup 1-2 


633.0 Child dav care centers 


424.0 Dav Care Centers 


634.0 Summer camps for children 


425.0 Summer Camps for Children 


635.0 Historic buildines 


3409.0 Historic buildines 


636.0 Limited eroup residences 


427.0 Limited eroup residences 


637.0 Deto>dfication Facilities 


428.0 Detoxification Facilities 


638.0 Group dwelling units 


429-0 tjiroup dwellinc 


. 


405.0 Undereround structures 


! - . 


426.0 Bull: merchandisinc retail buildings I 



IS 



780 CMK - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS' GUIDE 



: 


Fifth Edition 
Table of Contents 


Sixth Edition 
Article/Chapter Cross Reference 






Article 7 - CVTERIOR ENVIRONMEN- 
TAL REQUIREMENTS 


Chapter 12- INTERIOR ENVIRONMENT 






700.0 General 


1201.0 General 
1202.0 Definitions 






701.0 Plans and specifications 


1203.0 Construction documents 






702.0 ExistinE buildint; 


3400.6 Unsafe lighting and/ or unsafe ventilation 






703.0 Lieht and ventilation required 


1205.0 Lieht and ventilation required 






704.0 Natural lieht 


1206.0 NaniralUeht 






705.0 Artificial lieht 


1207.0 Aitifidalli^t 






706.0 Natural ventilation 


1208.0 Naniral ventilation 






707.0 Medianical ventilation 


1209.0 Mechanical ventilation 






708.0 Room dimensions 


1204.0 Room dimcnsioiB 






709.0 Ventilation of special spaces 


1210.0 Ventilarion of special spaces 








121 1 .0 Access to oawl spaces and attics 






710.0 Couns 


1212.0 Courts andvards 






711.0 Rearvards 


1212.0 Courts and vards 






7 1 2.0 Obstruction of courts and vards 


1213.0 Obstruction of courts and vards 




713.0 Window cleaning safeguards 1 


3110.G Window -cleaning safeguards 






714.0 Sound ttansmission control in residential 
bufldmcs 


1214.0 Sound transnussion control in residential 
buildings 






Articles- MEANS OF EGRESS 


Chapter 10 - MEANS OF EGRESS 






800.0 General 


1001.0 General 






801.0 Plans and specifications 


1002.0 Definitions 

1003.0 Construction documents 






802.0 Use and occupancy requirements 


1 004.0 Use group and occupanc\- requirements 






803.0 Prohibited use 


' 






804.0 Existine buildines 


3400.4 Special provisions for means of egress 






805.0 Maintenance of exits 


1028.0 Maintenance of exits 






806.0 Occupant load 


1008.0 Occupant load 






807.0 T\-pes and location of means of egress 


1006.0 Tvpes and location of means of eeress 






808.0 Capacity of egress comjwnents 


1 009.0 Capacity of eeress components 






809.0 Number of exits 


1010.0 Number of exits 






810.0 E.\it access passazew-avs and corridors 


1011.0 Exit access passageways and corridors 






811.0 Level of exit discharge paragew^^ used as 
an exit element 


1020.0 Level ofexit discharge passageways used 
as an exit element 






812.0 Means of eeressdoorwavs 


1017.0 Means of eeress doorways 






813.0 Revol vine doors 


1018.0 Revolving doors 1 




8 1 4.0 Horizontal exits 


1019.0 Horizontal exits 


1 




815.0 Ramps 


1016.0 Ramps 


1 




816.0 Interior stairwavs 


1014.0 Stairwavs 


1 




817.0 Access to roof 


1027.0 Access to roofe 


1 




8 1 8.0 Smokeproof enclosures 


1015.0 Smokeproof enclosures 


1 




8 ! 9.0 E-xierior stairwavs 


1014.0 Stairwavs 






820.0 Escalators and moving walks 


Chapter 30 






821.0 Fire escapes 


1025.0 .j^Fire escapes 






822.0 Slidescapes 


1026.0 Slidescapes 






823.0 Exit signs and linhts 


1023.0 Exit siens and liehts 






824.0 Means of egress liehtine 


1024.0 Means of eeress lichtine 






S25.0 Ha7.2rds to means of eeress 


1005.0 General limitaiions 






K2fv0 Assemblv aisles 


1012 Assemblv aisles and aisles access\v3\-s 


J 



780 CMR - Sixth Edition 



19 



780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



Fifth Edition 
Table of Contents 


Sixth Edition 
Article/Chapter Cross Reference 


827.0 Guards 


1021.0 


Guards 


828.0 Handrails 


1022.0 


Handrails |i 


Article 9 - nRERESISTIVE 
CONSTRUCTION 


Chapter 7 - FIRERESISTANT MATERI- | 
ALS AND CONSTRUCTION | 


900.0 GeneraJ 


701.0 


Genera] 


. 


70Z0 


Definitions 


901.0 Plans and specifications 


703.0 


Construction documents 


902.0 Fire hazard classification 


Table 313.1.2 Fireresistant ratings for fire | 
separation H 


903.0 Fire tests 


704.0 


Fire tests || 


904.0 Flame spread and flame resistance tests 


Chapters Interior Finishes 


905.0 Special fircresistive requirement 


Chapters Interior Finishes 


906.0 Exterior walls 


705.0 


Exterior walls " | 


907.0 Exterior openine protectives 


706.0 


Exterior opening protectives 


908.0 Fire walls and partv walk 


707.0 


Fire walls and panv walls 


909.0 Fire wall openings 


708.0 


Fire wall openines 


91 0.0 Fire separation walls 


709.0 


Fire separation assemblies 


9n.0 Smoke barriers 


712.0 


Smoke barriers 


912.0 Fireresistance ratine of stiuctural members 


•715.0 


Fireresistance ratine of structural members 


913.0 Fireresistance rated floor/roof/ceiling 
assemblies 


713.0 


Floor/ceiling and rooCceiling assemblies 


914.0 Roof construction 


714.0 


Roof construction 


915.0 Vertical shafts 


710.0 


Vertical shafts 


916.0 Fire door assemblies 


716.0 


Fire door assemblies 


9 1 7.0 Fire windows and shutters 


718.0 


Fire windows and shuners 


918.0 Fire dampers 


717.0 


Fire dampers > 


919.0 Wired Elass 


719.0 


Wired elass 


920.0 Fircresistive requirements for plaster 


721.0 


Fireresistive requirements for plaster 


1 921.0 Firestoppin^ and draftstoppin? 


720.0 


Firestoppine and draftstoppine 


1 922.0 Interior finish and trim 


803.0 


Interior finish and trim 


923.0 Application of interior finish 


804.0 


Application of interior finish 


924.0 Combustible materials permitted in floors on 
Tvpe 1 and 2 construction 


806.0 


Combustible materials permitted in floors 
on Tvpe I and 2 construction 


925.0 Decorative material restrictions 


807.0 


Interior handne and decorations 


926.0 E\nerior trim restrictions 


705. 1 .2 Combustible, e.xterior wall finish and trim || 


927.0 Roofstnictures 


714.0 


Roof construction 


928.0 Thermal and sound insuiatine materials 


722.0 


Thermal - and sound-insuiatine materials U 


929.0 Plenums 


2805.0 Plenums i 


930.0 Smoke and heat vents 


921.0 
922.0 


Smoke control systems 
Smoke and heat vents 


Article 10 - FIRE PROTECTION SYSTEMS 


Chapter 9- FIRE PROTECTION SYSTEMS i 


1000.0 General 


901.0 


General 


1001.0 Plans and specifications 


903.1. 


1 Fire protection construction documents 


1 002.0 Fire suppression svstems 


904.0 


Fire suppression svstems 


1 003.0 Suppression svstem selection 


905.0 


Suppression svstem aeent comparibilitv 


1004.0 Water sprinkler svstems 


906.0 


ftftf^rinkler svstems 


1 005.0 Limited area sprinkler svstems 


907.0 


Limited area sprinkler s\'stems 


1 005.0 Water-sDra\' fixed svstems 


908.0 


Water-sprav sprinkler svstems 


1007 Foam extineuishinc svstems 


911.0 


Foam extineuishinc svsiems 


100X0 Carbon dioxide extincuishine svstems 


9090 


Carbon dioxide extineuishin? s\-stems 



780 C\ffi. - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS' GUIDE 



;. — 1 

Fifth Edition 

Table or Contents 


Sixik Edition 
Article/Chapter Cross Reference 




1009.0 Haloeenaied fire ectincuishin? svstems 


912.0 Haloeenated extineuishine SN'stems 




1010.0 Dr\- chemical extincuishin? svstems 


9 1 0. Drv-chemical extineuishinc svstems 




1011.0 Wet chemical range hood tvtinguishing 
sx-stems 


913.0 Wet-d>emical range hood extinguishing 
s\'stems 




lOlZO Standpipe s\-stems 


914.0 Standpipe svstems 




1013.0 Standpipe systems for buildings imder 
construction or demolition 


3305.0 Fire hazards 




1014.0 Fire depaitment connections 


915.0 Fire detjartment connections 




1015.0 Water supplj' and other e.\nnguishing 
media 


903.0 Fire protection systems approval/ 
acceptance 




1016.0 Yardhvdrants 


91 6.0 Yard hvdrants/Undereround fire mains 




1 1017.0 Fire protection sienaline svstents 


9 1 7.0 Fire protection sienaline svstems 




1 1018.0 Ainomaiic fire deieaion svstems 


918.0 Automatic fire detection svstems | 




1 1019.0 Smoke control svstems 


921.0 Smoke control svstems 




1020.0 Supervision 


923.0 Supervision 




1021.0 Fire Evtineuishers 


920.0 Fue Extineuishers 




Article 11 - S IkUCTURAL LOADS 


Chapter 16 - STRUCTURAL LOADS 

(Portions of this chapter are entirely unique to 
Massachusetts) 




1100.0 General 


1601.0 General 
1602-0 Definitions 




1101.0 Plans and Specifications 


1603.0 Construction documents 




1102.0 Desien safe load 


1604.0 Desien safe load 




1103.0 Desien live load 


1607.0 I>esien live load 




1104.0 Desien dead load 


1605.0 Desien dead load 




1105.0 Existine buildines 


1617.0 E-dstine buildines 




1 1 06.0 Uniformly distributed IK-e loads 


1 606.0 Uniformlv distributed live loads 




1107.0 Concentrated loads 


1613.0 Concentrated loads 




1 1 08.0 Impact loads 


1614.0 Impact loads 




1109.0 Spedalloads 


1615.0 Spedalloads 




1110.0 Spedal consideration for roofe 


1609.0 Roofloads 




llIl.O Snow loads 


1610.0 Snow loads 




1112.0 Wind loads 


1611.0 Wind loads 




1-113.0 Earthquake loads 


1612.0 Eartiiquake loads 




1114.0 Combination of loads 


1 6 1 6.0 Combination of loads 




1115.0 Live load reduction 


1608.0 Live load reduction 




Article 12 - FOUNDATION SYSTEMS AND 
RETAINING WALLS 


Chapter 18 - FOUNDATIONS AND 
RETAINING WALLS 

(Portions of this chapter are entirely unique to 
Massachusetts) 




1200.0 General 


1801.0 General 




1201.0 Bearing pressures on foundation materials 


1 804.0 Load bearine value of soils 




1202.0 Subsurface e.\plorations 


1 802.0 Foundation investigations 




1203.0 Soil bearing tests 


1 803.0 Soil bearine tests 




1204.0 Allowable foundation loads 


1 805.0 Allowable foundation loads 




1205.0 Depth of foonncs 


1 806.0.|^ Depth of footines 




1206.0 Footine desien 


1 807.0 Footine desien 




1207.0 Timber footines and wood foundations 


1 808.0 Timber footines and wood foundations 




1208 Steel Erillaces 


1809.0 Steel erillaces 




1209 Concrele foonnes 


1810 Concrete footmes 




1210 Masonn- unil foonncs 


1 S 1 10 Masonn- unii foonncs 





780 CMR - Sixth Edition 



780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



Fifth Edition 
Tabic ©r Contents 


Sixth Edition 
Article/Chapter Cross Reference 




1311.0 


.Mat raft and float foundations 


1814.0 Mat. raft and float foundations 




1212.0 


Pier foundations 


1815.0 Pier foundations 




1213.0 


Pile foundations 


1816.0 Pile foundations 




1214.0 


Allowable pile loads 


1817.0 Allowable pile loads 11 




1215.0 


Structural steel piles 


1818.0 Structural steel piles 




1216.0 


Concrete-filled steel pipe and tapered 
tubular piles 


1819.0 Concrete-filled steel pipe and tapered tube 
piles 




1217.0 


Cast-in-place concrete piles 


1 820.0 Cast-in-place concrete piles 




1218.0 


Precast concrete piles 


1821 .0 Precast concrete piles 




1219.0 


Timber piles 


1822.0 Timber piles 




1220.0 


Composite piles 


1823.0 Composite piles 




1221.0 


Concrete-filled pipe wth steel core 
caissons 


1 824.0 Concrete-fiUed pipe with steel core 
caissons 




1222.0 


Foundation walls 


1 8 1 2.0 Foundation walls 




1223.0 


Retaining walls 


1825.0 Retaininc avails 




1224.0 


Waterproofine and dampproofin? 


1813.0 Waterproofine and dampproofine 




Article 13 - • MATERIALS AND TESTS 


Chapter 17 - STRUCTURAL TESTS AND 
INSPECTIONS 




1300.0 


General 


1701.0 Genera] 
1702.0 Definitions 




1301.0 


Alternative test procedure 


1707.0 Alternative test procedure 




1302.0 


Test safe load 


1708.0 Test safe load 




1303.0 


Tests 


1703.0 Information required 
1704.0 Approvals 




1304.0 


Desien streneths of materials 


1706.0 Desien streneths of materials 




1305.0 


Conditions of acceptance 


1703.0 Information requiried 
1704.0 Appro\-als 




1306.0 


Approx-als 


1704.0 Approvals 




Article 14 - MASONRY 


Chapter 21 - MASONRY 




1400.0 


General 


2101.0 General 




1401.0 


Masoniv consiruaion units 


2105.0 Masonry construction materials 




l402.0 


Brick units 


2105.2 Clavor shale masotuv units 




1403.O 


Structutal dav tile units 


1105.2 Clav or shale masonrv tmits 




1404.0 


Glazed dav masonrv units 


2 1 05.2 Clav or shale masonrv units 




1405.0 


Concrete units 


2 1 05.2 Clav or shale masoniv units 




1406.0 


Ardiitectural terra cotta 


2 1 05.2 Clav or shale masonrv units 




1407.0 


Natural stone 


2 1 05.3 Stone masonrv- units 




1408.0 


Cast stone 


2 1 05.3 Stone masonrv units 




1409.0 


Mortar and ^out for masonn- 


2105.7 Mortar 




1410.0 


Masonrv wall construction 


Chapter 21 - 21 IZO Masonrv construction 




I4U.0 


Bonding of walls 


2110.0 Bond 




1412.0 


Lateral bracing of walls 


2106.0 Lateral stabilitv/.2108.0 Lateral support 




I4I3.0 


Chases and recesses in bearine walls 


Chapter 21 - 21 12.1.4 Chases 




1414.0 


Waterproofine chases 


2 1 1 2.0 Masorwv construction 




1415.0 


Corbeled and projected masonrv 


2112.2 Corbeled masonrv 




1416.0 


Beaiinc on hollow unit walls 


21 12.Q^Jwlqsonrv construction 




I4I7.0 


Eneineered unreinforced masonrv 


2101.1.1 Engineered masonrv desien 




1418.0 


Reinforced masonrv 


Chapter 21: 2101.1.1; 2104.0 and 21 12.0 




14190 


Unreinforced Masonrv 


2112.0 Masonry construction 




1420.0 


Structural elass block units 


2115 Glass block walls 





780 CMR - Sixth Edition 



780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS' GUIDE 



nfth Edition 
Table of Contents 


Sixth Edition | 
Article/Chapter Cross Reference | 


i ;-;i.O Isoiated piers 


Chapter 21 1 


I 1-22.0 Dry - stacked, surface-boarded masonrv 
! w-alis 


Chapter 21 | 


1 Article IS. CONCRETE 


Chapter 19 - CONCRETE i 


•1 1500.0 Concrete desien standards 


1901.0 Concrete desien standards | 


1501 .0 Seismic design provisions 


1902-0 Definitions 

1 903.0 Seismic requirements for reinforce 
concrete 


1502.0 Materials 


1 904.0 Seismic requirements for plain concrete 
1906.0 Materials 
1907.0 Durabili^ 


1503.0 Concrete qtiali^ 


1908.0 Concrete quality, mixine and pladne 


1504.0 Mixing and pladne of concrete 


1908.0 Concrete quality, mixins and ptacine 


1505.0 Fonnwork, embedded pipes, and 
constmciion joints 


1909.0 Fonnwork, embedded pipes, and 
construction joints 


1 506.0 Details of reinforcement 


1910.0 Details of reinforcement 


1507.0 Concrete-fiUed pipe columns 


1912.0 Concrete-filled pipe columns 


1508.0 Shotcrete 


1911.0 Shotcrete 


1509.0 Minimum slab thickness 


1905.0 Minimum slab thickness 


Article 16 - GYPSUM AND PLASTER 


Chapter 25 - .GYPSUM BOARD AND 
PLASTER 


1600.0 Genera] 


2501.0 General 
2502.0 Shear walls 


1 60 1 .0 Interior lathin? and evpsum plasterine 


2505.0 Intrerior lathine and ev-psum plasterine 


1602.0 Portland cement stucco iaih and plaster 


2506.0 Portland cement stucco lath and plaster 


1603.0 Gi^sum board materials 


2503.0 Gvpsum board materials 


1 604 . G\-psum constructi on 


2504.0 Gvpsum construction' 


Article 17 - WOOD 


Chapter 23 - WOOD 


1700.0 General 


2301.0 General 


1 1701.0 Lumber and timber construction 


Chapter 23 


1 1702.0 Heaw timber tvpe construction 


2304.0 Heaw timbei construction 


1 1703.0 Desien and construction 


Chapter 23 


1 1704.0 Wall construction 


Chapter 23 


1 1705.0 Floor construction 


Chapter 23 | 


1706.0 Roof construction 


Chapter 23 . | 


1707.0 Stress skin panels 


Chapter 23 | 


1 708.0 Structural glued-laminated timber and 
built-up wood constniction 


Chapter 23 


1709.0 Fiber boards 


2309.0 Fiber boards 


1710.0 Plvwood 


Chapter 23 


|| 1711.0 Particle board 


2308.0 Particle board 


1 7 12.0 Protection aEainst decav and termites 


Chapter 23 


Article 18- STEEL 


Chapter 22 - S'l EEL 


1800.0 General 


2201.0 General 
2202.0 Definitions 


I SOI .0 Structural steel construction 


2203.0 Structural steel construction 


1 802.0 Formed steel construction 


2204.0 Seismic requirements for structural steel 
2206-0 Formed steel construction 


1 803.0 Open web steel joist constmciion 


2205.0 Open web steel joist construclion 


1804.0 Remforcine steel 


2208.0 Reinforcine steel 


I f!05 Cast steel construclion 


2209 Cast steel construction 



.780 C.VIR - Sixth Edition 



- 780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

THE MASSACHUSETTS STATE BUILDING CODE 



Fifth Edition 
Table of Contents 


Sixth Edition 11 
Article/Chapter Cross Reference || 


1 806.0 Cast iron construction 


2210.0 Cast iron construction H 


1 807.0 Special steel and steel cable structural 
SN-stems 


2207.0 Special steel and steel cable structural | 
sv-stcms 


! 808.0 Exterior steel &ame corrosion protection 
under masonrv 


22 1 1 . Exterior steel frame corrosion protection 
under masonrv 


Article 19 - LIGHTWEIGHT METAL 
ALLOYS 


Chapter 20 - UGHTWEIGHT METALS 


1900.0 General 


2001.0 General 


1901.0 Materials 


2002.0 Materials 


Article 20 - PLASTIC 


Chapter 26 - PLASTIC 


2000.0 General 


2601.0 General 
2602.0 Definitions 


2001.0 Light-transmitting plastics 


2604.0 General requirements for light transmitting 
plastics 

2605.0 Light-transmitting wall panels 

2606.0 Light-transmitting plastic glazing of unpro- 
tected openings 

2606.0 Light-transmitting plastic roof panels 

2608.0 Lieht-transmittins skvlieht elazing 


200Z0 Foam plastics 


2603.0 Foam plastics 


Article 21 - EXTERIOR WAT.I-S 


Chapter 14 - EXTERIOR WALL 
COVERINGS 


2100.0 General 


1401.0 General 


2101.0 General construction rea uirements 


1403.0 Performance requirements 


2 1 02.0 Flood resistant construction 


3 1 07.0 Flood-resistant cottstruction 


2103.0 Raiproofina 


1403.7 Ratproofine and Chapter 12 


2 1 04.0 Weather protection 


1403.3 Weather resistance 


2105.0 Wall panels 


1405.0 Veneers 


2106.0 Metal veneers 


1405.0 Veneers 


2107.0 Masonrv veneers 


1405.0 Veneers 


2108.0 Thin stone and tile veneers 


1405.0 Veneers 


2109.0 Structural glass veneers 


1405.0 Veneers 


Article 22- VERTICAL AND SLOPED 
GLASS GLAZING 


Chapter 24 - GLASS AND GLAZING 


2200.0 General 


2401.0 General 


220 1 .0 General requirement for elass 


2402.0 General requirement for elass 


2202.0 Wind loads for elass 


2403.0 Wind, snowr and dead loads on elass 


2203.0 Safetv elazin? 


2405.0 Safetv elazine 


2204.0 Sloped elazin? and skvliehts 


2404.0 Sloped elazine and skvliehts 


2205.0 Light-transmitting plastic glazing of 
unprotected operunes 


2604.0 General requirements for light transmitting 
plastics 


2206.0 Lieht in handrails and cnjardrails 


2406.0 Glass in handrails and euardrails 


2207 Glazing in racquetball and squash courts 


2407.0 Glazine in racquetball and squash courts 


Article 23 - ROOFS AND ROOF 
COVERINGS 


Chapter IS - ROOFS AND ROOF 
COVERINGS 


2300.0 General 


1501.0 General 
1502.0 Definitions 


2301.0 Fire classification 


1506 V^'Fire classification 


2302.0 Wood shingles 


1505.0 Performance requirements 
1507.2.8 Woodshineles 


2303.0 Asphalt shingles 

1 


1505.0 Performance requirements 
1507.2 3 Asphalt shineles 



7S0 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS' GUIDE 





Fifth Edition 
Table of Contents 


Sixth Edition 1 
Article/Chapter Cross Reference | 






2304.0 Flashing 


1508.0 Flashing 






2305.0 Fastening 


1505.0 Performance requirements 
1507.0 Prescriptive requirements 






2306.0 Light-transniitting plastic roof panels 


2604. General requirements for light transmining 
plastics 


' 




- 


1503.0 Construction doctiments 






. 


1504.0 Weather Protection 






. 


1509.0 Roof insulation 






- 


1510.0 Roof structures 






i 


1511.0 Rooftop helipons | 






- 


1512.0 Reroofin? 






Article 24 - MASONRY FIREPLACES 


2114.0 FIREPLACES AND CHIMNEYS 






2400.0 General 


2114.1 Scope 






240 1 .0 Plans and spedScations 


2 1 03 . Construction documents 






2402.0 Construction requirements 


2114.0 Fireplaces and dumnevs i 






Article 25 - MECHANICAL EQUIPMENT 
AND SYSTEMS 


Chapter 28 - MECHANICAL SYSTEMS 






2500.0 General 


2801.0 General 






2501.0 Plans, specifications and permits 


2802.0 Construction documents 1 






2502.0 Inspections and tests 


2804.0 Inspections and tests 1 






2503.0 Existing buildings 


28021 Construction documents 
2811.0 E.\istine buildincs 






2504.0 Fees 


2803.0 Fees 






2505.0 Dtvin? rooms 


2806.0 Dfvine rooms 






2506.0 Waste and linen handline svstems 


2807.0 Waste and linen handline svstems 






2507.0 Refiise vaults 


2808.0 Refijse vaults ' 






2508.0 DusL stock and refijse convevor svstems 


2808.0 Refuse vaults 






2509.0 Medical eases 


2809.0 Medical eases 






2510.0 Oxveen svstems 


2810.0 Oxveen svstems 




2511.0 Boiler rooms 


302. 1 . 1 Specific occupancv areas 




25 1 2. Solid fiiel bumins hrating appliances 


2813.0 Solid fiiel bumine heatine appliances 








2805.0 Plenums 








2812.0 Power vents 






Article 26 - ELEVATOR, DUMBWAITER 
AND CONVEYOR EQUIP- 
MENT, INSTALLATION AND 
MAINTENANCE 


Chapter 30- ELEVATOR AND CONVEYOR 
SYSTEMS 

(This chapter is entirely unique to Massachusetts 

See Ompter 30 far information regarding 

524 CMR) 






2600.0 General 








2601 .0 Plans, speciiications and permits 








2602.0 Tests and inspections 




1 




2603.0 Certificate of compliance 




1 




2604.0 Maintenance and acddenis 




1 




2605.0 E.xistinE installations 




1 




2606.0 Alterations 








2608-0 Hoistwav enclosures and ventine 


«.*- 






2609.0 Elevator and dumbwaiter machinery and 
equipment 








2610.0 Machine rooms and related construcuon 
for passenger and freight elevators and 
1 dumb\\'aiters 







780 CMR - Sixth Edition 



25 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
-HE MASSACHUSETTS STATE BUILDING CODE 



Fifth Edition 
Table of Contents 


Sixth Edition 
Article/Chapter Cross Reference 


:;6n.o 


Elevator openinc protectives 




■ 2612.0 


Elevator car cmert;encv sicnals and siens 




1 2613.0 


Manlifts (prohibited) 


- 


: 2614.0 


Industrial lifts and loadinc ramps 




! 2615.0 


Automotive lifts 




2616.0 


Convevors 




2617.0 


Escalators 




Article 27 - ELECTRICAL WIRING AND 
EQUIPMENT 


Chapter 27 - ELECTRICAL WIRING, 

EQUIPMENT, AND SYSTEMS 
(This chapter is entirelv unique to Massachusetts) 


Article 28 - PLUMBING AND GAS 
HTIING 


Chapter 29 - PLUMBING SYSTEMS 
(This chapter is entirelv unique to Massachxisettf) 


Article 29- SIGNS 


CHAPTER 31 -SPECIAL CONSTRUCTION 


2900.0 


General 


3102.1 General 


2901.0 


Plans, specifications and permits 


3102.4 Permits and construction documwjts | 


I 2902.0 


Exemptions 


3102.4.3 Permit exemptions 


2903.0 


Unsafe and unlawful siens 


3102.5.1 Removal 


, 2904.0 


Existing si^ns 


3102.4.2 Alterations 


1 2905.0 


Maintenance and inspection 


3 1 02.5 Maintenance and Inspections 


1 2906.0 


Bonds and liabflitv insurance 


310Z0 Siens 


1 2907.0 


General requirements for all siens 


3102.0 Siens 


• 2908.0 


Ground siens 


3102.7 Ground siens 


2909.0 


Roof siens 


3102.8 Roof siens 


2910.0 


Wall siens 


3102.9 Wall siens 


2911.0 


Projectinc siens 


3102.10 Projectine siens 


2912.0 


Marquee siens 


3102.11 Marquee siens < 


2913.0 


Miscellaneous and temporarv siens 


3 1 02. 12 Temporarv siens 


: 2914.0 


Illuminated siens 


3 1 02. 13 Dluminaied siens 


; 2915.0 


Portable siens 


3 1 OZ 1 4 Portable siens 


Article 30 - PRECAUTIONS DURING 
BUILDING OPERATIONS 


Chapter 33 - SFTE WORK, DEMOLITION 
AND CONSTRUCTION 


: 3000.0 


General 


3301.0 General | 


3001.0 


Plans, specification and special permits 


3302.0 Construction documents and special 
permits 


1 3002.0 


Tests 


3303.0 Tests 


3003.0 


Inspection 


3301.0 General 


3004.0 


Maintenance 


3306.0 Maintenance 


3005.0 


Existine buildincs 


3309.0 Existini; buildings 


3006.0 


Protection of public and workmen 


3304.0 Protection of public | 


3007.0 


Demolition and excavation 


3310.0 Demolition and e.xcavation | 


3008.0 


Regulations of lots 




3009.0 


Retainine walls and partition fences 


33 1 1.0 Retainine walls and jjartition fences 


3010.0 


Storage of materials 


33 12.0 Storage of materials and construction 
equipment 


3011.0 


Removal of waste material 


3313.0 Removal of waste material 


3012.0 


Protection of adioinine propertv 


3308.0 iBcetection of adjoinine propertv 


3013.0 


Protection of floor and wall openings 


3304.0 Protection of public | 


3014.0 


Scaffolds 


3 3 1 2.0 Storage of matenals and construction 
equipment 


1 3015.0 


Hoists 


33 12.0 Storage of matenaJs and construction 

eguiDmeni | 



780 CMR- Sixth Edition 



780 CMR-- STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USERS' GUIDE 



Fifth Edition 
Table of Contents 



Sixth Edition 
Article/Chapter Cross Reference 



3016.0 Siainx-avs and ladders 



3314.0 Siairwa^-s 



3017.0 Lighting 



3315.0 Lighting 



3018.0 Fire hazards 



3305.0 Fire hazards 



3019.0 Health hazards 



3307.0 Health hazards 



3020-0 Welding safet>' precautions 



3304.0 Protection of materials and construction 
equipment 



3021.0 Sanitation 



3022.0 Disputes 



Article 31 - ENERGY CONSERVATION 



Chapter 13 - ENERGY CONSERVATION 

(Ttus chapter is entirely unique to MassachusertsJ 



3100.0 General 



1301.0 General 



3 1 01 .0 Administrative 



I30I.1 Administrative 



3 1 02.0 Existing buildings 



1302.0 Existing buildings 



3 1 03.0 Plans and specifications 



1303.0 Plans and specifications 



3 1 04.0 Materials and equipment 



1304.0 Materials and eqtiipment 



3I0S.0 Design conditions 



1305:0 Design conditions 



3 1 06.0 Buitding insulation spedfications 



1306.0 Building insulation specifications 



3 1 07.0 Air infiltration & moisture control 



1307.0 Air infiltration & moisture control 



3 1 08.0 Component design 



1308.0 Component design 



3 1 09.0 Exterior envelope requirements for low- 
rise residential btiildings 



1309.0 Exterior envelope requirements for low- 
rise residential buildings 



3 1 1 0.0 Heating, ventilatins. & air-conditioning 
(HVAC) systems - 



1310.0 Heating, ventilating. & air-coiiditioning 
(HVAC) systems 



3111.0 Heating, ventilating &. air-conditioning 
equipment . 



131 1.0 Heating, ventilating & air-conditioning 
equipment 



3 1 1 2.0 Electric power distribution 



1 3 1 2.0 Electric power distribution 



3013.0 Lighting systems 



1313.0 Lighting systems 



30 14.0 Building envelope requirements for 
commercial and hi^rise residential 
buildings 



1314.0 Building envelope requirements for 
conunerdal and high-rise residential 
■ buildings 



3115.0 Building design by system analysis 



1315.0 Building design bv sv'Stem analysis 



3 1 1 6.0 Buildings utilizing solar, geoifaermal, wind 
or other non-depleaiable energy sources as 
alternative design 



1316.0 Buildings utilizing solar, geothennal, wind 
or other non-depletable energy sources as 
alternative design 



Article 32 - REPAIR, ALTERATION, 

ADDITION AND CHANGE OF 
USE OF EXISTING 
BUILDINGS 



Chapter 34 - REPAIR, ALTERATION, 

ADDITION AND CHANGE OF 
USE OF EXISTING 
BUILDINGS 

(This chapter is entirely unique to Massachusetts) 



3200.0 Scope 



34001 Scope 



3201.0 Definitions 



3401.0 Definitions 



3202.0 Implementation 



3402.0 Implementation 



3203.0 Requirements for continuation of the same 
use group of equal or lesser hazard inde.\ 



3404.0 Requirements for continuation of the same 
use group or change to a use group resulting 
in a change in hazard index of one or less 



3204.0 Requirements for change in use group to 
one hazard inde-\ greater 



3404.0 Requirements for continuation of the same 
,^gg_^oup or change to a use group resulting 
in a change in hazard index of one or less 



3205.0 Requirements for change in use group to 
two or more hazard indices ereater 



3405.0 Requirement for change in use group to nvo 
of more hazard indices greater 



3206 Compliance aiiemaiives 



3406 Compliance aitematives 



3207.0 Energy provisions for existing buildings 



3407 Energy provisions for existing buildings 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
"HE MASSACHUSETTS STATE BUILDING CODE 



rtfth Edition 
Table of Contents 


Sixth Edition 
Article/Chapter Cross Reference 


3208.0 Other code sections pertaining to repair, 
alteration, or change of use of existing 
buildines 


3408.0 Structural requirements for existing . 
buildings 


Article 33- MANUFACTURED 

BUILDINGS, BUILDING 
COMPONENTS AND MOBILE 
; HOMES 


Chapter 35 - MANUFACTURED 
BUILDINGS, 

MANUFACTURED BUILDING 
COMPONENTS, AND 
MANUFACTURED HOUSING 
(This chapter is entirely unique to Massachusetts) 


I 3300.0 General 


3501.0 General 
3502.0 Definitions 


13301.0 Approval 


3503.0 Construction documents 
3504.0 Approval 


] 3302.0 Certification 


3505.0 Certification 


: 3303.0 Reciprocitv . 


3506.0 Reciprocitv 


3304.0 Assurance inspection 


3507.0 Asstirance inspection 


330S.0 Responsibili^ of the building o£Eicial 


3508.0 Responsibility of the local enforcement 
agencies 


3306.0 Suspension and revocation of certification 


3509.0 Suspension and revocation of certification 


Article 34- ONE AND TWO FAMILY 
DWEI,T.INGS 


Chapter 36 - ONE AND TWO FAMILY 
DWELLINGS 

(Portions of this chapter are entirely unique to 
Massachusetts) 


3400.0 General 


360 1 . 1 General administration 


3401.0 Building Planning 


3603.0 Building Planning 


3402.0 Fotmdaiions 


3604.0 Foundations 


' 3403.0 Wall Construction 


3606.0 Wall Construction 


3404.0 Wallcovering 


3607.0 WanCoverme 


3405.0 Floors 


3605.0 Floors 


3406.0 Roof-ceiling construction 


3608.0 Roof-ceiling construction | 


3407.0 Roofcoverines 


3609.0 Roofcoverines | 


3408.0 Chinuievs, fireplacesand connector plates 


3610.0 Chimnevs and fireplaces | 


3409.0 Solid file! burning appliances 


3610.0 Chimnevs and fireplaces | 


3410.0 Metiianical equipmrnt. eeneral 


Sections 3611, 3612 and 3613 j 


34 11 .0 Combustion air 


3620.0 Combustion air 


3412.0 Warm-air fuTiace 


3614.0 Heatine and cooline equipment H 


34 1 3.0 Vented decorative appliances, floor 

fjunaces, vented wall fiimaces and vented 
room heaters 


. -s—i r « 

361 6.0 Vented floor, wall and room heaters 


34 1 4.0 Venting of appliances 


3616.0 Vented floor, wall and room heaters | 


3415.0 Ducts 


3619.0 Duas\-stems 


34 1 6.0 Comfort cooline 


3614.0 Heating and cooline equipment 


• 34 1 7.0 Absorption units and absorption systems 
for comfort cooline and comfort heating 


36 1 4.0 Heating and cooling equipment 


34 1 8.0 Fuel suppiv systems 


3614.0 Heating and cooline equipment 


1 34 1 9.0 Enerev conservation bv comoonent desien 


3603.21 Energv conservation requirements 


: 3420.0 Building insulation 


3603.19 Insulation/flame spread, smoke 

•devaloped/crincal radiant flux, and; 
3603.21 Energv conservation requirements 


; 3421.0 Ventilation 


3617.0 Ventilation air supply 


, 5422.0 Vapor bamers 


3603.21 Enenr-' ccnservalion reouirements . 


; 5423.0 U-values of bulldine components 


3603.21 Enere^' conservaoon reouirements 


, 5424.0 Air leakai^e for all buildincs 


3603 21 Enerc\- consen-ation reauirements 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILX)ING REGULATIONS AND STANDARDS 

USERS* GUIDE 



Fifth Edition 
Table of Contents 



Sixih Edition 
Article/Chapter Cross Reference 



3425.0 S^'Ste^Tl design heatine/cooline capacity 



3614.0 Heating and cooling equipment/3603 .2 1 



3426.0 Controls 



3603.21 Energy conservation requirements 



3427.0 Balancing 



3603.21 Energy consen-aiion reqtiirements 



3428.0 Duct insulation 



3619.0 Ducts>'Stems/3603.21 Energ>' 
conservation requirements 



3429.0 Pipe insulation 



3603.21 Energy conservation requirements 



Reference Standards 



ApT>endL\ A 



Index to Tables and Figures 



General Index 



General Index 



APPENDICES 



APPENDICES 



Reference Standards 



A Reference Standards 



B Unit dead loads for design 



purposes 



G Unit dead loads for design purposes 



C Recommended fastening schedule 



C Recommended fastening schedule 



D Gtiidance for selection of foundation material 
classes in table I S04.3 



D Guidance for selection of foundation material 
cl?sses in table 1804.3 



E Procedure for accounting for series and parallel 
heat flow paths 



E Procedure for accounting for senes and parallel 
heal flow paths 



F Reference data for repair, addition, and change 
of use of existing buildings 



F Reference data for repair, addition, and change 
of use of e.xisting buildings 



G Specialized Massadtusets rules and regulations 
other than state building code commission 



A Appendix A 



H Historic structures 



H Historic structures 



B Sample building permit application forms state 
building tode appeals apphcanon forms 
official interpretations 



J Energy cortservanon for low-nse residennal 
building 



K Floor protector thermal conducnvny 
calculations 



L Schedule of Fees 



SPECIAL REGULATIONS 



SPECIAL REGULATIONS 



780 CMR-1 Concrete Testing Laboratories 
Licensing 



780 CMR Rl Concrete Testing Lat>or»iones 
Licensing 



780 CMR-2 Concrete Testing Personnel Licensing 



780 CMR R2 Concrete Testing Personnel Licensing 



780 CMR-3 Manufactured Buildings. Building 
Components and Manufactured Homes 



780 CMR R3 Manufactured Buildmgs, Building 
Components and Manufactured Homes 



780 CMR-4 Use of Native Lumber 



780 CMR R4 Use of Native Lumber 



780 CMR-5 Construction Supervisors Licensing 



780 CMR R5 Construction Supervisors Licensing 



780 CMR-6 Home Improvement Contractor 
Registration 



780 CMR R6 Home Improvement Contractor 
Registration 



780 CMR-7 Certification of Building Code 
Enforcement OfBcials 



780 CMRR7 Certification of Building Code 
Enforcement Officials 



780 CNfR - Sixth Edition 



/ 780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

THE MASSACHUSETTS STATE BUILDING CODE 

NON-TEXT PAGE 



30 780 CMR - Sixth Edition 




THE COMMONWEALTH OF MASSACHUSETTS 

William Francis Galvin, Secretary of the Commonwealth 

State Publications and Regulations 

REGULATION FILING AND PUBLICATION 



1. Regulation Chapter, Number & Heading; 



780 CMR 



2 Nameof Agency THE MASSACHUSETTS STATE BUILDING CODE 

STATE BOARD OF BUILDING REGULATIONS & STANDARDS 

3. This document is reprinted from the Code of Massachusetts Regulations and contains the following: 



This is the 

Sixth Edition of the IVIassachusetts State Building Code 

as adopted by the 

State Board of Building Regulations and Standards and filed with the 

Office of the Secretary of the Commonwealth 



Under the Provisions of Massachusetts General Laws, Chapter 30A, § 6, and Chapter 233, § 75, 
this document may be used as evidence of the original documents on file with the Secretary of the Commonwealth. 



Compiled as in full force and effect: 



4/26/2001 



BUI DING CODE 4/26/01 
BLD&G0DE8TH2001 

^30.00 



48073 



A true copy attest: 



WILLIAM FRANCIS GALVIN 

Secretary of the Commonwealth 



THE MASSACHUSETTS 
STATE BUILDING CODE 



780 CMR 

Sixth Edition 



COMMONWEALTH OF MASSACHUSETTS 



Published by 

William F. Galvin 

Secretary of the Commonwealth 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

FOREWORD and ACKNOWUDGMENTS 
THE MASSACHUSETTS STATE BUILDING CODE (780 CMR), SIXTH EDITION 

FOREWORD 

The Sixth Edition of 780 CMR ,the Massachusetts State Building Code has been revised from the Fifth Edition to make 
it consistent with the common code format of the National Code, the Uniform Building Code and the Southern Building 
Code, both in chapter and sub-chapter numbering. The technical content is based on the 1993 edition of the Building 
Officials and Code Administrators (BOCA) National Building Code. Extensive technical changes have been made as 
a result of reviews by the BBRS technical advisory committees, hsted in this section, and also as required by 
Massachusetts General Laws and Specialized Codes and Regulations. 

Chapter 36, the One and Two Family Dwelling Code, has been revised from the Fifth to the Sixth Edition to make it 
consistent with the 1995 edition of the CABO One and Two Family Dwelling Code to the extent practicable. 
Substantive changes have been made as a result of reviews by the BBRS staff, state and municipal building officials, 
and technical advisory boards. 

The following chapters are considered unique to the Commonwealth of Massachusetts, in their entirety: 

Chapter 1 - Administration 

Chapter 9 - Fire Protection Systems 

Chapter 1 1 - Accessibility 

Chapter 13 - Energy Conservation 

Chapter 16 - Structural Loads 

Chapter 18 - Foundations and Retaining Walls 

Chapter 27 - Electrical Wiring and Equipment 

Chapter 29 - Plumbing and Gasfitting 

Chapter 30 - Elevator and Conveying Systems 

Chapter 34 - Repair, Alteration and Change of Use of Existing Buildings 

Chapter 35 - Manufactured Buildings, Building Components and Mobile Homes 

Several differences appear in the format of the Sixth Edition from that of the Fifth Edition; a major change pertaining 
to the numbering system. Other changes in the content of the Sixth Edition that are different from that of national 
building code, are shown in bold-faced, italicized type. Chapters which are significantly different than the national 
building code are identified with the parenthetical statement This Chapter is Entirely Unique to Massachusetts. 

The Sixth Edition of the Massachusetts State Building Code (780 CMR) becomes effective on February 28, 1997. 

In recognition of the time periods involved in the planning, design and construction of buildings and building related 
projects and in order to effect an orderly and equitable transition between the Fifth Edition and Sixth Edition, the State 
Board of Building Regulations and Standards implements the following policy; 

From Febraary 28, 1997 to August 27, 1997 the Fifth mi Sixth Editions of the Massachusetts State Building Code shall 
be considered to be concurrently effective. During this period, the end user may elect to utihze the provisions of either 
the Fifth Edition in its entirety SL the Sixth Edition in its entirety. 

The Fifth Edition will be automatically repealed on August 27, 1997 after wWch date all users shall comply widi the 
provisions of the Sixth Edition. 

PURCHASING OPTIONS 

The One and Two-Fandly DtveUing Code, identified in the Sixth Edition as Chapter 36, may be purchased as a separate 
package, including Chapter 1, Administration and Enforcement and Appendix A, or it may be purchased as part of the 
entire code package. 

TbeSules and Regulations of the Board of Building Regulations and Standards identified as 780 CMR-Rl through 
780 CMR-R7, may be purchased as a separate package or as part of the entire code package. 

Also available is the Guide to the Sixth Edition of the Massachusetts State Building Code, This guide was developed 
to assist code users in making the transition between the Fifth Edition and Sixth Edition and is sold as part of the code. 
It includes a ChapterXArticle Number Cross Reference-Index and a Summary of Major Changes made in the Sixth 
Edition relative to the Fifth Edition and the national biulding code. 

The code may be ordered in any manner identified above by calling the State House Bookstore @ (617) 727-2834. 
ii 780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

FORWARD AND ACKNOWLEDGEMENTS 

AMENDMENT PROCESS 

Pursuant to M.GL. c. 143, § 97, 780 CMR is subject to change by amendment Amendments shall be proposed on 
forms made available at the office of the Board of Building Regulations and Standards. Proposals are offered at public 
hearing where the Board hears testimony both for and against the proposals. Proposals are then studied and voted upon 
by the Board. Those that are voted "approved" are issued as amendments to 780 CMR and become effective when 
pubHshed in the Bi-weekly MASSACHUSETTS BEGISTER. 

All proposals for amendment to 780 CMR must be received at least 60 days prior to the public hearing date. Changes 
that are voted "approved" are issued on a cycle determined by the Board; generally not sooner than a two year cycle. 

The Board convenes public hearings to entertain changes to the code a Tninimnm of twice each calendar year; in May 
and November. Other public hearings may be scheduled as necessary. 

Anyone wishing to present a code change proposal should contact the OfBce of the Board at (617) 727-3200 extension 
614 for information on how to file. It is the responsibility of the code user to check the MASSACHUSETTS 
REGISTER periodically to determine if amendments have been issued. 

BOARDS AND COMMITIEES 
STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 



Professor KentaroTsutsumi, P.E., Chairman 
Registered Professional Engineer (Structural) 

Daniel P. O'Sullivan, Vice Chairman 
Inspector of Buildings (City) 

Thomas E. Donovan, General Contractor 
of One and Two Family Homes 

Thomas G. Gatzunis, P.E. 
Inspector of Buildings (Town) 

William P. Kramer, P.E. 
Registered Professional Engineer 
(Mechanical) 

Alexander H. MacLeod, RA. 
Registered Architect 



Stanley S. Shuman, P.E. 

General Contractor of Commercial & Industrial Buildings 

Thomas L. Rogers (Ex-OfGcio) 

Chief of Inspections 

(Gary Moccia, P.E. - Designee) 

Robert E. Banks 

Building Trades Representative 

Chief William V.Dolan 

Head of a Local Fire Department 

Steven Coan (Ex Officio) 

State Fire Marshal 

(Maurice M. Pilette, P.E. - Designee) 



PAST MEMBERS CONTRIBUTING TO THIS CODE: 



Richard Mcintosh 

Inspector of Buildings (Town) 



Douglas Cole Smith, RA 
Registered Architect 



STAFF 

Thomas L. Rogers, Administrator 

Robert A. Anderson, Deputy Administrator 

Brian Gore, PE, C.Eng., Technical Director 

Thomas M. Riley, Code Development Manager 

Marian Doyle, Home Improvement Contractor Program Manager 

Patricia A. Brennan, Building Code Board of Appeals Manager 

Anne Marie Rose 

Mary Kavanaugji 

lulie Allan 
Jeffrey Putnam 
Heather McEwan 
Sean MacDonald 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDE^IG CODE 

RESEARCH ASSISTANTS 

Andrew Bodnar (Legal Research) 
Derek Greaser (Technical Research) 

CONSTRUCTION MATERIALS SAFETY BOARD (CMSB) 



Professor Kentaro Tsutsumi, P.E., Chairman 
College of Engineering 
Tufts University 

Charles A. J. Theodore, P.E. 
Hometech Consulting Group 

Terrence Johnston, Laboratory Supervisor 
Testing Laboratory 
Metropolitan District Commission 

Sanford Kaplan 

Sanford Constriction Company 



Francis Harvey, P.E., RA. 
Harvey and Tracy 

Ara Shrestinian, P.E., Vice President 
The Thompson & Lichtner Co., Inc. 

Professor Louis C. Tartaglione, P.E. 

Department of Civil Engineering University of Lowell 

James Keefe 

The Beacon Companies 



Staff Liaison -Thomas M. Riley 
FIRE PREVENTION - FIRE PROTECTION BOARD 



John M. Murphy, Chairman 
htemational Municipal Signalmen's 
Association 

Lt Michael P. Astkin 

Massachusetts Fire Prevention Association 

Chief James W. Clarke 
Massachusetts Fire Chiefs Association 

Chief William V.Dolan 
Massachusetts Fire Chiefs Association 

Walter B. Adams, AIA 
Registered Architect 



Harold Cutler, P.E. 

Registered Professional Engineer 

(Fire Protection) 

Lt Robert Bourke 

Massachusetts Fire Prevention Association 

Steven Coan, State Fire Marshal 
(Maurice M. Pilette, P.E. - Designee) 

CarUsle V. Smith, PE 

Board of Fire Prevention Regulations 

Commissioner Martin Pierce 
Mass. Fire Chiefs Association 
(Paul M. Donga - Designee) 



Staff Liaison - Thomas M. Riley 
GEOTECHNICAL ADVISORY COMMTITEE 



Edmund G. Johnson, P.E., Chairman 
Haley & Aldrich, Inc. 

Nino Catalano, P.E. 
ICOS Boston 

P. A. O'Neill, P.E. 

New England Foundation, Co. 

AsafA. Qazilbash,P.E. 
Asaf A. Qazilbash Associates 



Peter K. Taylor, P.E., Vice Chairman 
Stone & Webster Engineering 

EldonL. Abbot, P.E. 

Parsons Brinkerhoff Quade and Douglas, Inc. 

David Shields, P.E. 
Geotechnical Engineers, Inc. 

Dr. Richard M. Simon, P.E. 
GZA Associates 

Robert Hoyler,P,E, 
McPhail Associates 



Staff Liaison - Robert A. Anderson 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUE,DING REGULATIONS AND STANDARDS 

FORWARD AND ACKNOWLEDGEMENTS 



SEISMIC ADVISORY COMMTITEE 



Norton S. Remmer, P.E., Chainnan 
Norton S. Remmer Consulting Engineers 

Dr. John. T. Christian, P.E. 
Consulting Engineer 

Francis D. Leathers, P.E. 
Geotecbnical Engineers, Inc. 

Nicholas Mariani, P.E. 
Charles T. Main, Inc. 

Maurice A. Reidy, Jr., P.E. 
Maurice A. Reidy Engineers 

Professor Kentaro Tsutsumi, P.E. 
BBRS Representative 



Kenneth B. Weisner, P.E., Vice Chainnan 
Le Messuiier Consultants 

Joseph J. 2^na, P.E. 

Simpson, Gumpertz, & Heger, Inc. 

Dr. Cetin Soydemir, P.E. 
Haley and Aldrich 

Wayne Siladi, P.E. 
Weidlinger Associates, Inc. 

Richard Henige, P.E. 
Le Messurier Consultants 



Staff Liaison - Brian Gore, P.E., C. Eng. 
MEMA Liaison. John C. Smith - Earthquake Program Manager 



Dr. Frank J. Heger, P.E., Chairman 
Simpson, Gumpertz & Heger, Inc. 

Rubin M. Zallen, P.E. 
Consulting Engineer 

Hans William Hagen, P.E. 
Lim Consultants 

Arthur L. Brown, P.E. 
Boston Building Consultants 



LOADS ADVISORY COMMITTEE 

Stanley S. Shuman, P.E. 
BBRS Member 

Michael Joliffe, P.E. 
Zaldastani Associates 

Edward LeNormand, P.E. 
Chapin Associates 

Tom McGanigle, P.E. 
Amman & Whitney 

Staff Liaison - Brian Gore, P.E, C. Eng. 



BUILDING OFTldAL CERTmCAHON COMMTITEE 

(The Standing Certification Committee) 



Matthias J. Mulvey, Chairman 
Massachusetts Building Commissioners 
and Inspectors Association (Representative) 
Certified Building Code Enforcement Official 

Daniel P. O'SuIlivan, Vice Chairman 

Building Officials of Western Massachusetts 

(Representative) 

Certified Building Code Enforcement Ofiicial 

Paul J. Nonni, Member at Large 

Certified Building Code Enforcement Official 

Don York, Member at Large 

Certified Building Code Enforcement Official 

(Michael Card) 



David Thyng, P.E. 

Southeastern Massachusetts Building Officials 

Association (Representative) 

Certified Building Code Enforcement Official 



Robert Betit, Member at Large 

Certified Building Code Enforcement Official 

(Peter DePesa 

Fred Hanack, P.E., Member fi-om Academia 

Robert A. Anderson, BBRS Representative 
Certified Building Code Enforcement Official 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

ENERGY ADVISORY COMMmEE 



Thomas M. Riley, 
BBRS Representative 

Dale Gigandet 

State Fire Marshal Representative 

AnneGros 

DOER Representative 

Michael Andelman, P.E., 
Shooshanian Engineering, Inc 

Jerard Ives, R.A 

Jerard Ives Registered Architect 

Robert Figuerido, P. E. 
Digital Equipment Corp. 

Nick Johnson. P. E. 

Bard, Rao & Athanas Consulting Engineers, Inc. 

Joel Wedding 

Department of Labor and Industries 

Richard Kramer 

Home Builders Association of Greater Springfield 



WUliam Habib 

Home Builders Association of Massachusetts 

Melvin Fink 

Home Builders Association 

Charles E. Wheeler 

New England Power Service 

Ron Moreira 
Bay State Gas Co. 

Michael Ferrante 
Massachusetts Oil Heat Council 

Charles Brewster 

Accent Sales and Marketing 

Jack Desmond 
Cox Engineering 

Robert Thorell 

Building Commissioner, Westminster 

Mike Martin 

Waltham Development Co. 



Marian Doyle 
BBRS Representative 

Harry Smith 
HIC Registrant 

William O'Brien 

NARI Eastern MA Chapter 

Jack Elliott 

NARI Western MA Chapter 



fflC ADVISORY COMMTITEE 

Paul Schlaver 

MA Consumer Coalition 



Arlie Costine Scott 

Representative fi'om the OfiBce of the AG 

Frank Rosen 
Fund Administrator 

Ken Wade 

Representative of the Attorney General 



TECHNICAL CODE COUNCIL 

Pursuant to M.G.L. c. 143, § 3, there shall be an advisory board known as the technical code council 
which shall make recommendations relative to the formulation, promulgation and administration of the 
state building code. The make-up of the council is available at the OflBce of the Board of Building 
Regulations and Standards. 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

TABLE OF CONTENTS 



TABLE OF CONTENTS 



Chapterl: ADMINISTRATION 

(This chapter is entirely unique to Massachusetts) 



lOLO 


Scope 


102.0 


Applicability 


103.0 


Maintenance 


104.0 


Validity 


105.0 


Office of the inspector of buildings or building commissioner 


106.0 


Duties and powers of the building official 


107.0 


Duties and powers of the state inspector 


108.0 


Rules & regulations 


109.0 


Approval 


110.0 


Application for permit 


111.0 


Permits 


112.0 


Demolition of structures 


113.0 


Conditions of permit 


114.0 


Fees 


115.0 


Inspection 


116.0 


Registered architectural and professional engineering services 




construction control 


117.0 


Workmanship 


118.0 


Violations 


119.0 


Stop work order 


120.0 


Certificate of occupancy 


121.0 


Unsafe structures 


122.0 


Board of appeals 


123.0 


Construction Materials safetj' Board 


124.0 


Fire Prevention - Fire Protection Advisory Committee 


125.0 


Structural Peer Review Advisory Committee 



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24 
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27 
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32 
32 
32 



Chapterl: DEFmiTIONS 

201.0: General 

202.0: General Definitions 



Chapter 3: USE OR OCCUPANCY 



301.0 
302.0 
303.0 
304.0 
305.0 
306.0 
307.0 
308.0 
309,0 
310.0 
311.0 
312.0 
313.0 



General 

Classification 

Assembly use groups 

Business use group 

Educational use group 

Factory and industrial use groups 

High hazard use groups 

Institutional use groups 

Mercantile use group 

Residential use groups 

Storage use groups 

Utility and miscellaneous use group 

Mixed use groups 



Chapter 4: SPECIAL USE AND OCCUPANCY 



401.0 
402.0 
403. 
404.0 
405.0 
406.0: 
407.0; 
408.0 
409.0 



General 

Covered mall buildings 
High rise buildings 
Atriums 

Underground structures 
Open parking structures 
Private garages 
Public garages 
Use Group 1-2 



47 

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2/7/97 (Effective 2/28/07) 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

TABLE OF COI>rrENTS - continued 

Chapter 4: SPECIAL USE AND OCCUPANCY - continued 



410.0 


Use Group 1-3 


4n.o 


Motion picture projection rooms, screening rooms and sound stages 


412.0 


Stages and platforms 


413.0 


Special amusement buildings 


414.0 


Airport traffic control towers 


415.0 


Outdoor processing facilities 


416.0 


HPM facilities 


417.0 


Hazardous materials 


418.0 


Use Groups H-1, H-2, H-3 and H-4 


419.0 


Application of flammable finishes 


420.0 


Mobile units 


421.0 


Swimming pools 


422.0 


Existing buildings 


423.0 


Group Residences 


424.0 


Day Care Centers 


425.0 


Summer Camps for Children 


426.0 


Bulk Merchandising Retail Buildings 


427.0 


Limited Group Residences 


428.0 


Detoxification Facilities 


429.0 


Group Dwelling Units 


apter 


5: GENERAL BUILDING LIMITATIONS 


501.0 


General 


502.0 


Definitions 


503.0 


General height and area limitations 


504.0 


Height modifications 


505.0 


Mezzanines 


506.0 


Area modifications 


507.0 


Unlimited areas 



Page 



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79 
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85 



92 
93 
95 
99 
99 
104 
107 
109 

113 

113 
113 
113 
115 
116 
116 
117 



Chapter 6: TYPES OF CONSTRUCTION 



601.0 
602.0 
603.0 
604.0 
605.0 
606.0 



General 

Construction classification 
Types 1 and 2 construction 
Type 3 construction 
Type 4 construction 
Type 5 construction 



Chapter 7: FIRERESISTANT MATERIALS AND CONSTRUCTION 

701.0: General 

702.0: Defmitions 

703.0: Construction documents 

704.0: Fire tests 

705.0; Exterior walls 

706.0: Exterior opening protectives 

707.0: Fire walls and party walls 

708.0: Fire wall openings 

709.0: Fire separation assemblies 

710.0: Vertical shafts 

711.0: Fire partitions 

712.0: Smoke barriers 

713.0: Floor/ceiling and roofceiling assemblies 

714.0: Roof construction 



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7SC CMR - Sixth Edition 



2/7/97 (Effective 2/28/97) 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

TABLE OF CONTENTS 



TABLE OF CONTENTS - continued 



Chapter 7: FERERESISTANT MATERIALS AND CONSTRUCTION - continued 

7 1 5.0: Hreresismnce rating of structural members 

716.0: Fire door assemblies 

717.0: Fire dampers 

7 1 8.0: Fire windows and shutters 

719.0: Wired glass 

720.0: Firestopping and draftstopping 

721 .0: Hreresistive requirements for plaster 

722.0: Thermal- and sound-insulating materials 

Chapters: INTERIOR FINISHES 

801.0: General 

802.0: Definitions 

803.0: Interior finish and trim 

804.0: Application of interior finish 

805.0: Hoor finish 

806.0: Combustible materials permitted in floors of type 1 and 2 construction 

807.0: Interior hangings and decorations 

Chapter 9: FIRE PROTECTION SYSTEMS 
(This chapter is entirely unique to Massachusetts) 

901.0: General 

902.0: Definitions 

903.0: Fire protection systems approval/acceptance 

904.0: Hre suppression systems 

905.0: Suppression system agent compatibility 

906.0: Fire sprinkler system 

907.0: Limited area sprinkler systems 

908.0: Water-spray fixed systems 

909.0: Carbon dioxide extinguishing systems 

910.0: Dry-chemical extinguishing systems 

9 1 1 .0: Foam extinguishing systems 

912.0: Halogenated extinguishing systems 

913.0: Wet-chemical range hood extinguishing systems 

914.0: Standpipe systems 

915.0: Fire department connections 

916.0: Yard hydrants/underground fire mains 

917.0: Fire protective signaling systems (Fire alarm systems) 

9 1 8.0: Automatic fire detection systems 

919.0: Single- and multiple-station smoke detectors 

920.0: Hre extinguishers 

921.0: Smoke control systems 

922.0: Smoke and heat vents 

923.0: Supervision 

924.0: Hre pumps 

Chapter 10: MEANS OF EGRESS 

1001.0: General 

1002.0: Definitions 

1003.0: Construction documents 

1004.0: Use group and occupancy requirements 

1005.0: General limitations 

1006.0: Types and location of means of egress 

1007.0: Accessible means of egress 

1008.0: Occupant load 

1009.0: Capacity of egress components 

1010.0: Number of exits 

1011.0: Exit access passageways and corridors 



Page 



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143 

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146 

147 

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2/7/97 (Effective 2/28/97) 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

TABLE OF CONTENTS - continued 



Chapter 10: MEANS OF EGRESS - continued 

1012.0: Assembly aisles and aisle accessways 

1013.0: Grandsmnds 

1014.0: Stairways 

1015.0: Smokeproof enclosures 

1016.0: Ramps 

1017.0: Means of egress doorways 

1018.0: Re vol ving doors 

1019.0: Horizontal exits 

1020.0: Level of exit discharge passageways used as an exit element 

1021.0: Guards 

1022.0: Handrails 

1023.0: Exit signs and lights 

1 024.0: Means of egress lighting 

1025.0: Fire escapes 

1026.0: Slidescapes 

1027.0: Access to roof 

1 028 .0: Maintenance of exits 



Page 



180 
182 
183 
187 
189 
189 
190 
194 
195 
195 
196 
196 
197 
197 
198 
198 
199 



Chapter 11: ACCESSIBILnY 

(780 CMR 11 is Entirely Unique to Massachusetts) 

Chapter 12: INTERIOR ENVIRONMENT 

1201.0: General 

1202.0: Definitions 

1203.0: Construction documents 

1204.0: Room dimensions 

1205.0: Light and ventilation requhed 

1206.0: Naturallight 

1207.0: Artificial light 

1208.0: Natural ventilation 

1209.0: Mechanical ventilation 

1210.0: Ventilation of special spaces 

121 1 .0: Access to crawl spaces and attics 

1212.0: Courts and yards 

1213.0: Obstruction of courts and yards 

1214.0: Sound transmission control in residential buildings 

1215.0: Ratproofing 

Chapter 13: ENERGY CONSERVATION 

(This chapter is entirely unique to Massachusetts) 

1301.0: Administration 

1302.0: Definitions 

1303.0: Design conditions 

1304.0: Building envelope requirements 

1305.0: Heating, ventilation and air conditioning 

1306.0: Service water heating 

1307.0: Electric power distribution 

1308.0: Lighting systems 

1309.0: Building design by systems analysis 



201 



203 

203 
203 
203 
203 
204 
204 
204 
204 
205 
205 
205 
205 
206 
206 
207 

209 

209 

213 

220 

221 

231 

241 

242 

242.1 

242.7 



780 CMR - Sixth Edition 



6/8/01 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

TABLE OF CONTENTS 



TABLE OF CONTENTS - continued 



Chapter 14: EXTERIOR WALL COVERINGS 



1401.0 


General 


1402.0 


Definitions 


1403.0 


Performance requirements 


1404.0 


Materials 


1405.0 


Veneers 


1406.0 


Combustible materials on the exterior side of exterior walls 


apter 15: ROOF AND ROOF COVERINGS 


1501.0: General 


1502.0 


Definitions 


1503.0 


Construction documents 


1504.0 


Weather protection 


1505.0 


Performance requirements 


1506.0 


Fire classification 


1507.0 


Prescriptive requirements 


1508.0 


Flashings 


1509.0 


Roof insulation 


1510.0 


Roof structures 


1511.0 


Rooftop heliports 


1512.0 


Reroofing 



Page 

243 

243 
243 
243 
243 
244 
248 

251 

251 
251 
251 
251 
251 
252 
252 
254 
255 
255 
256 
256 



Chapter 16: STRUCTURAL LOADS 

(This chapter is entirely unique to Massachusetts) 



1601.0 


General 


1602.0 


Definitions 


1603.0 


Construction documents 


1604.0 


Design safe load 


1605.0 


Design dead load 


1606.0 


Uniformly distributed live loads 


1607.0 


Design live load 


1608.0 


Live load reduction 


1609.0 


Roof loads 


1610.0 


Snow loads 


1611.0 


Wind loads 


1612.0 


Earthquake loads 


1613.0 


Concentrated loads 


1614.0 


Impact loads 


1615.0 


Special loads 


1616.0 


Combination of loads 


1617.0 


Existing buildings 



257 

257 
257 
257 
258 
258 
258 
259 
259 
260 
261 
271 
278 
296 
297 
297 
298 
299 



Chapter 17: STRUCTURAL TESTS AND INSPECTIONS 
(Substantial portions of this chapter are unique to Massachusetts) 



1701.0 
1702.0 
1703.0 
1704.0 
1705.0 
1706.0 
1707.0: 
1708.0 
1709.0 
1710.0 



General 

Definitions 

Information required 

Approvals 

Requirements for special tests and inspections 

Design strength of materials 

Alternative test procedure 

Test safe load 

In-situ load tests 

Preconstruction load tests 



301 

301 
301 
301 
302 
302 
306 
306 
306 
306 
307 



2/7/97 (Effective 2/28/97) 



780 CMR - Sixth Edition 



780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

TABLE OF CONTENTS - continued 



Chapter 18: FOUNDATIONS AND RETAEsTNG WALLS 

(This chapter is entirely unique to Massachusetts) 



1801.0 
1802.0 
1803.0 
1804.O 
1805.0 
1806.0 
1807.0 
1808.0 
1809.0 
1810.0 
1811.0 
1812.0 
1813.0 
1814.0 
1815.0 
1816.0 
1817.0 
1818.0 
1819.0 
1820.0 
1821.0 
1822.0: 
1823.0 
1824.0 
1825.0: 



General 

Foundation investigations 

Soil bearing test 

Load bearing value of soils 

Allovi'able foundation loads 

Depth of footings 

Footing design 

Timber footings and wood foundations 

Steel grillages 

Concrete footings 

Masonry unit footings 

Foundation walls 

Waterproofing and dampproofing 

Mat, raft and float foundation 

Pier foundations 

Pile foundations 

Allowable pile loads 

Structural steel piles 

Concrete-filled steel pipe and tube piles 

Cast-in-place concrete piles 

Precast concrete piles 

Timber piles 

Composite piles 

Concrete filled pipe with core caissons 

Retaining walls 



Chapter 19: CONCRETE 



1901.0 
1902.0 
1903.0 
1904.0 
1905. 
1906.0 
1907.0 
1908.0 
1909.0 
1910.0 
1911.0 
1912.0 



Concrete design standards 

Definitions 

Seismic requirements for reinforced concrete 

Seismic requirements for plain concrete 

Minimum slab thickness 

Materials 

Durability requirements 

Concrete quality, mixing and placing 

Formwork, embedded pipes, and construction joints 

Details of reinforcement 

Shotcrete 

Concrete-filled pipe columns 



Chapter 20: LIGHTWEIGHT METALS 

2001.0 General 
2002.0 Materials 

Chapter 21: MASONRY 

2101.0: General 

2102.0: Definitions 

2 1 03 . 0: Construction documents 

2104.0: Seismic requirements 

2105.0: Masonry construction materials 

2106.0: Lateral stability 

2107.0: Compressive stress requirements 

2108.0: Lateral support 

2 1 09.0: Thickness of masonry 

2110.0: Bond 



Page 

309 

309 
309 
309 
310 
312 
313 
313 
314 
314 
314 
315 
315 
316 
318 
318 
320 
323 
326 
326 
327 
332 
332 
333 
333 
334 

335 

335 
335 
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351 

353 

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780 CMR - Sixth Edition 



2/7/97 (Effective 2/28/97) 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

TABLE OF CONTENTS 

TABLE OF CONTENTS - continued 



Chapter 2 1 : MASONRY - continued 
211L0: Anchorage 
2112.0: Masonry construction 
2113.0: Miscellaneous requirements 
21 14.0: Fireplaces and chimneys 
2115.0: Glass block walls 

Chapter 22: STEEL 



2201.0 
2202.0 
2203.0 
2204.0 
2205.0 
2206.0 
2207.0 
2208.0 
2209.0 
2210.0: 



General 

Definitions 

Structural steel construction 

Seismic requirements for structural steel 

Open web steel joist construction 

Formed steel construction 

Special steel and steel cable structural systems 

Reinforcing steel 

Cast steel construction 

Cast iron construction 



Page 



362 
363 
364 
364 
365 

367 

367 
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369 
369 
369 
370 
371 
371 
371 



Chapter 23: WOOD 



2301.0 
2302.0 
2303.0 
2304.0 
2305.0 
2306.0 
2307.0 
2308.0 
2309.0 
2310.0 
2311.0 
2312.0 
2313.0 



General 

Definitions 

Performance requirements 

Heavy timber construction 

Wood frame construction 

Seismic requirements for wood and timber 

Wood structural panels 

Particleboard 

Fiber boards 

Fireretardant treated wood 

Naturally durable and preservative treated wood 

Joist hangers 

Prefabricated components 



Chapter 24: GLASS AND GLAZING 



2401.0 
2402.0 
2403.0: 
2404.0: 
2405.0 
2406.0 
2407.0: 



General 

General requirements for glass 

Wind, snow and dead loads on glass 

Sloped glazing and skylights 

Safety glazing 

Glass in handrails and guardrails 

Glazing in racquetball and squash courts 



Chapter 25: GYPSUM BOARD AND PLASTER 

2501.0: General 

2502.0: Shear walls 

2503.0: Gypsum board materials 

2504.0: Gypsum construction 

2505.0: Interior lathing and gypsum plastering 

2506.0: Portland cement stucco lathing and plastering 



373 

373 
373 
373 
374 
375 
381 
388 
390 
391 
392 
393 
394 
395 

397 

397 
397 
397 
399 
399 
401 
401 

403 

403 
403 
403 
405 
405 
405 



2/7/97 (Effective 2/28/97) 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUTLDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

TABLE OF CONTENTS - continued 



Page 



Chapter 26: PLASTIC 



260L0 
2602.0 
2603.0 
2604.0 
2605.0 
2606.0 
2607.0 
2608.0 



General 

Definitions 

Foam plastic 

General requirements for light transmitting plastics 

Light-transmitting wall panels 

Light-transmitting plastic glazing of unprotected openings 

Light-transmitting plastic roof panels 

Light-transmitting skylight glazing 



Chapter 27: ELECTRICAL WIRING, EQUIPMENT AND SYSTEMS 
(This chapter is entirely unique to Massacltusetts) 



407 

407 
407 
407 
409 
410 
411 
411 
412 

415 



Chapter 28: MECHANICAL SYSTEMS 



2801.0: 


General 


2802.0: 


Construction documents 


2803.0: 


Fees 


2804.0: 
2805.0: 


Inspections and tests 
Plenums 


2806.0: 
2807.0: 
2808.0: 


Drying rooms 

Waste and linen handling systems 

Refuse vaults 


2809.0: 


Medical gases 


2810.0: 
2811.0: 
2812.0: 


Oxygen systems 
Existing buildings 
Power ventors 


28.13.0 


Solid fuel-fired appliances 



417 

417 
417 
417 
417 
417 
418 
418 
419 
419 
419 
419 
419 
420 



Chapter 29: PLUMBING SYSTEMS 

(This chapter is entirely unique to Massachusetts) 



421 



Chapter 30: ELEVATORS AND CONVEYING SYSTEMS 
(This chapter is entirely unique to Massachusetts) 

3001.0: General 



423 



423 



Chapter 31 : SPECLVL CONSTRUCTION 



3101.0 
3102.0 
3103.0; 
3104.0 
3105.0 
3106.0 
3107.0 
3108.0 
3109.0 
3110.0: 



General 
Signs 

Membrane structures 
Temporary structures 
Canopies and awnings 
Pedestrian walkways 
Flood-resistant construction 
Radio and television towers 
Radio and television antennas 
Window-cleaning safeguards 



Chapter 32: CONSTRUCTION IN THE PUBLIC RIGHT- OF- WAY 



3201. 
3202.0 
3203.0 
3204.0 
3205.0: 



General 

Street encroachments 
Permissible street projections 
Special and temporary projections 
Awnings and canopies 



425 

425 
425 
428 
430 
430 
431 
432 
436 
436 
436 

437 

437 
437 
437 
438 
438 



780 CMR - Sixth Edition 



2/7/97 (Effective 2/28/97) 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

TABLE OF CONTENTS 

TABLE OF CONTENTS - continued 



Chapter 33 SITE WORK, DEMOLITION AND CONSTRUCTION 



330L0 
3302.0 
3303.0 
3304.0 
3305.0 
3306.0 
3307.0 
3308.0 
3309.0 
3310.0 
33n.O 
3312.0 
3313.0 
3314.0 
3315.0 



General 

Construction documents and special permits 

Tests 

Protection of public 

Fire hazards 

Maintenance 

Health hazards 

Protection of adjoining property 

Existing buildings 

Demolition and excavation 

Retaining walls and partition fences 

Storage of materials and construction equipment 

Removal of waste material 

Stairways 

Lighting 



Chapter 34 REPAIR, ALTERATION, ADDITION AND CHANGE OF USE 

OF EXISTING STRUCTURES 
(This chapter is entirely unique to Massachusetts) 

3400.0: Scope 

3401.0: Definitions 

3402.0: Implementation 

3403.0: Hazard index 

3404.0: Requirements for continuation of the same use group or change to a use group 

resulting in a change in hazard index of one or less 

3405,0: Requirements for change in use group to two or more hazard indices greater 
3406.0: Cc.-npliance altematives 

3407.0: Energy provisions for existing buildings 
3408.0: Structural requirements for existing buildings 

3409.0: Historic buildings 

Chapter 35: MANUFACTURED BUILDINGS, MANUFACTURED 

BUILDING COMPONENTS AND MANUFACTURED HOUSING 

(This chapter is entirely unique to Massachusetts) 



3501.0 
3502.0: 
3503.0 
3504.0 
3505.0 
3506.0 
3507.0 
3508.0 
3509.0 



General 

Definitions 

Construction documents 

Approval 

Certification 

Reciprocity 

Assurance inspection 

Responsibility of the local enforcement agencies 

Suspension or revocation of certification 



Chapter 36: ONE AND TWO FAMILY DWELLINGS 

3601.0; One and two family dwelling code - general administration 

3601.1: General 

3601.2: Purpose 
3602.0: Building definitions 

3602.1: General 

3602.2: General building definitions 
3603.0: Building Planning 

3603. 1 : Structural Design Criteria 

3603.2: Construction in Areas Subject to Flooding 

3603.3: Fireresistance rating of exterior walls 

3603.4: Dwelling unit separation 

3603.5: Garage separation 



Page 

441 

441 
441 
441 
441 
442 
442 
442 
443 
443 
443 
444 
444 
444 
444 
444 



445 
446 
447 
448 

448 
449 

449 
450 
451 

458 



461 
461 
462 
462 
463 
463 
463 
463 
464 

465 

465 
465 
465 
467 
467 
467 
469 
469 
474 
474 
474 
474 



2/7/97 (Effective 2/28/97) 



780 CMR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AKT) STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

TABLE OF CONTENTS - continued 

ONE AND TWO FAMILY DWELLINGS - continued 



Chapter 36: 

3603.6: Light 
3603.6.4: 
3603.6.5 
3603.6.6: 
3603.6.7 
3603.6.8 

3603.7 

3603.8 



entilation and heating 
Natural light 
Artificial light 
Natural ventilation 
Mechanical ventilation 
Ventilation of special spaces 

Room dimensions 

Ceiling height requirements 



3603.9: Access to crawl spaces and attics 

3603.10: Means of Egress 

3603. 1 1 : Doors and hallways 

3603.12: Landings 

3603.13: Stairways 

3603.14: Handrails and guardrails 

3603.15: Ramps 

3603. 1 6: Fire protection systems 

3603.17: Foam plastic 

3603. 1 8: Interior finish requirements/fiame spread and smoke developed 

3603. 19: Insulation/flame spread, smoke developed/critical radiant flux 

3603.20: Glazing 



3603.20.4: 
3603.20.5: 



Safety glazing 

Sloped glazing and skylights 



3603.21 
3603.22 
3603.23 
3603.24: 
3603.25 



Energy conservation requirements 

Protection against decay and termites 

Manufactured buildings and manufactured housing 

Sanitation 

Electrical requirements 



3604.0: Foundations 



3604.1 
3604.2: 
3604.3 
3604.4 
3604.5 
3604.6 
3604.7 
3604.8 
3604.9 
3605.0: Floors 
3605.1 
3605.2: 
3605.3 
3605.4 
3605.5 
3605.6 



General 

Materials 

Footings 

Foundation walls 

Foundation drainage 

Foundation waterproofing and dampproofmg 

Foundation insulation 

Columns 

Crawl space 



General 

Floor Framing 

Floor sheathing 

Treated-wood floors (on ground) 

Concrete floors (on grade) 

Metal 

3606.0: Wall Construction 
3606.1. General 
3606.2: WaU fi-aming 
3606.3: Metal 

3606.4: General masonry construction 
3606.5: Unit masonry 
3606.6: Multiple wythe masonry 
3606.7: Grouted masonry 
3606.8: Windows 
3606.9: Sliding glass doors 
3606. 10: Plywood and wood structural panels 
3606.11: Particleboard 



Page 



474 
475 
475 
476 
476 
476 
477 
477 
477 
477 
478 
478 
478 
479 
479 
480 
481 
482 
482 
482 
483 
484 
485 
485 
486 
487 
' 487 
489 
489 
490 
490 
494 
497 
498 
499 
499 
499 
501 
501 
501 
525 
527 
527 
528 
529 
529 
529 
536 
536 
544 
544 
545 
547 
548 
548 
548 



10 



780 CMR - Sixth Edition 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDAliDS 

TABLE OF CONTENTS 
TABLE OF CONTTENTS - continued 



Page 



Chapter 36: ONE AND TWO FAMILY DWELLINGS - continued 
3607.0: 



3609.0: 



3610.0: 



3611.0: 



3613.0: 



3614.0: 



3615.0: 



3616.0: 



Wall Covering 


549 


3607.1 


General 


549 


3607.2 


Interior covering 


549 


3607.3 


Exterior covering 


552 


Roof-ceiling construction 


557 


3608.1 


General 


557 


3608.2 


Roof fi'aming 


557 


3608.3 


Roof sheathing 


559 


3608.4 


Metal 


560 


3608.5 


Ceiling fiiushes 


561 


3608.6 


Roof ventilation 


561 


3608.7 


Attic access 


561 


Roof coverings 


591 


3609.1 


General 


591 


3609.2 


Deck preparation 


591 


3609.3 


Asphalt shingles 


591 


3609.4 


Slate shingles 


592 


3609.5 


Metal 


593 


3609.6 


Tile, clay, or concrete shingles 


593 


3609.7 


Built-up roofing 


593 


3609.8 


Wood shingles 


594 


3609.9 


Wood shakes 


594 


3609.10: Reroofing 


596 


Chimneys and fireplaces 


599 


General 


599 


3610.2 Masonry chimneys 


599 


3610.3 Factory-built chimneys 


601 


3610.4 Masonry fireplaces 


601 


3610.5 Factory-built fireplaces 


606 


3610.6 


617 


Mechanical administration (Tltis section Li entirely unique to Massachusetts) 


611 


3611.1: General 


611 


3611.2: Existing mechanical systems 


611 


Mechanical definitions 


613 


3612.1: General 


613 


3612.2: General mechanical definitions 


613 


General mechanical system requirements(rais section is entirely unique to Massachusetts) 


619 


3613.1 


General 


619 


3613.2 


Approval 


619 


3613.3 


Labeling of equipment not under the control of 527 CMR or 248 CMR 


619 


3613.4 


Type of fijel 


619 


3613.5 


Appliance access 


619 


3613.6 


Clearances from combustible construction 


619 


3613.7 


Appliance installation 


620 


3613.8 


Control devices 


622 


Heating and cooling equipment (This section is entirely unique to Massachusetts) 


623 


3614.1: General 


623 


3614.2: Heat pump equipment 


624 


3614.3: Refrigeration cooling equipment 


624 


Electric resistance heating 


625 


3615.1 


General 


625 


3615.2 


Radiant heating systems 


625 


3615.3 


Duct heaters 


625 


Vented floor, wall and room heaters 


627 


3616.1 


General 


627 


3616.2 


Vented wall furnaces/additional requirements 


627 


3616.3 


Vented room heaters/additional requirements 


627 



2/7/97 (Effective 2/28/97) 



780 CMR - Sixth Edition 



3622.1 
3622.3 
3622.4 



Page 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND ST.'WDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

TABLE OF CONTENTS - continued 

Chapter 36: ONE AND TWO FAMILY DWELLINGS - continued 

3617.0; Ventilation air supply 629 

3618.0: Exhaust systems 631 

3618.1: Clothes dryer exhaust 631 

3618.2: Range hoods 631 

3618.3: Installation of microwave ovens 63 1 

3618.4: Overhead ventilating hoods 631 

3619.0: Duct systems 633 

3619.1: Duct construction 633 

3619.2: Return air 634 

3619.3: Supply air 635 

3620.0: Combustion air 637 

3620.0: General 637 

3620.2: All air from inside the building 637 

3620.3: All combustion air from outside the building 637 

3620.4: Combined use of indoor and outdoor air for combustion 638 

3621.0: Chimneys and vents 643 

3621.1: General 643 

3621.2: Vent components 643 

362 1 .3 : Chimney and vent connectors 644 

3621.4: Vents 644 

3621.5: Masonry and factory-built chimneys 645 

3622.0: Solar systems 647 

General 647 

Labeling 627 

Prohibited heat transfer fluids 647 



LIST OF APPENDICES 

A: Referenced Standards 649 

B: Sample Building Permit Application Forms 669 

State Building Code Appeals Application Forms 677 

Official Interpretations 682 

C: Recommended Fastening Schedule 709 

D: Guidance For Selection of Foundation Material Classes in Table 1804.3 713 

E: ProcedurefFor Accounting for Series and Parallel Heat Flows 715 
F: Reference Data for Repair, Addition, and Change of Use of 

Existing Buildings 717 

G: Unit Dead Loads for Design Purposes 737 

H: Historic Buildings 745 

I: Independent Structural Engineering Review 751 

J: Energy provisions 753 

K: Floor protector thermal conductivity calculations 761 

780 CMR - SPECIAL RULES AND REGULATIONS 

Rl 
R2 
R3 
R4 

R5 
R6 
R7 



Concrete Testing Laboratories Licensing 763 

Concrete Testing Personnel Licensing 767 

Manufactured Buildings, Building Components and Mobile Homes 769 

Use of Native Lumber 783 

Construction Supervisors 785 

Registration and Enforcement of Home Improvement Contractor Program 789 

Certification of Inspectors of Buildings, Building Commissioners and Local Inspectors 801 



INDEX 807 



780 CMR - Sixth Edition 2/7/97 (Effective 2/28/97) 



CHAPTER 1 

ADMINISTRATION 

(Substantial portions of this Chapter are entirely unique to Massachusetts) 



780 CMR 101.0 SCOPE 

101.1 Title: 780 CMR shall be known as the 
Commonwealth of Massachusetts State Building 
Code. 

101.2 Scope: 780 CMR, in accordance with St. 
1984, c. 348, as amended shall control all matters 
concerning; 

(a) the construction, reconstruction, alteration, 
repair, demolition, removal, inspection, issuance 
and revocation of permits or licenses, installation 
of equipment, classification and definition of any 
building or structure and use or occupancy of all 
buildings and structures or parts thereof except 
bridges and appurtenant supporting structures 
which have been or are to be constructed by, or 
are under the custody and control of the 
Department of Public Works (Massachusetts 
Highway Department), the Massachusetts 
Turnpike Authority, the Massachusetts Bay 
Transportation Authority, the Metropolitan 
District Commission, or the Massachusetts Port 
Authority or for which said agencies have 
maintenance responsibility; 

(b) the rehabilitation and maintenance oi existing 
buildings; 

(c) the standards or requirements for materials to 
be used in connection therewith, including but not 
limited to provisions for safety, ingress and 
egress, energy conservation and sanitary 
conditions; 

(d) the establishment of reasonable fees for 
inspections and the issuance of licenses to 
individuals engaged as construction supervisors; 

(e) the certification of inspectors of buildings, 
building commissioners and local inspectors and; 

(f) the registration of Home Improvement 
Contractors pursuant to MGL c 142A, except as 
such matters are otherwise provided for in the 
Massachusetts General Laws Annotated, or in the 
rules and regulations authorized for promulgation 
under the provisions of 780 CMR. 

(g) other duties and responsibilities as defined in 
780 CMR Rl through R7. 

101.3 Application of references: Unless otherwise 
specifically provided for in 780 CMR, all references 
to chapter or section numbers, or to provisions not 
specifically identified by number, shall be construed 
to refer to such chapter, section or provision of 
780 CMR. 

101.4 Intent: 780 CMR shall be construed to secure 
its expressed intent, which is to insure public safety, 
health and welfare insofar as they are affected by 



building construction, through structural strength, 
adequate means of egress facilities, sanitary 
conditions, light and ventilation, energy 
conservation and fire safety; and, in general, to 
secure safety to life and property fi-om all hazards 
incident to the design, construction, reconstruction, 
alteration, repair, demolition, removal, use or 
occupancy of buildings, structures or premises. 

101.5 Specialized Codes: Specialized codes, rules 
or regulations pertaining to building construction, 
reconstruction, alteration, repair or demolition, 
promulgated, and under the authority of the various 
boards which have been authorized by the general 
court shall be incorporated into 780 CMR. The said 
specialized codes, rules or regulations include, but 
are not limited to, those listed in Appendix A. 

101.6 Referenced standards: The standards 
referenced in 780 CMR and listed in Appendix A 
shall be considered part of the requirements of 
780 CMR to the prescribed extent of each such 
reference. Where differences occur between 
provisions of 780 CMR and referenced standards, 
the provisions of 780 CMR shall apply. The 
administrative provisions of 780 CMR shall apply to 
all standards referenced in Appendix A, other than 
the specialized codes in 780 CMR 101.5. 

780 CMR 102.0 APPUCABELITY 

102.1 General: The provisions of 780 CMR shall 
apply to all matters affecting or relating to buildings 
and structures, as set forth in 780 CMR 101.0 and 
shall apply with equal force to municipal, county, 
state authorities of or established by the legislature 
and private buildings and structures, except where 
such buildings and structures are otherwise provided 
for by statute. The construction, reconstruction, 
alteration, repair, addition, change in use or 
occupancy, demolition, removal of all buildings and 
structures shall comply with 780 CMR. 

102.2 Matters not provided for: Any requirements 
that are essential for the structural, fire or sanitary 
safety, interior climate comfort of an existing or 
proposed building or structure, or for the safety of 
the occupants thereof which are not specifically 
provided for by 780 CMR, shall be determined by 
the building official. The State Board of Building 
Regulations and Standards (hereinafter referred to as 
the BBRS) and the Department of Public Safety 
shall be notified by the building official in writing 
witiiin seven working days of any action taken 
pursuant to 780 CMR 102.2. 



2/7/97 (Eff'ective 2/28/971 



780 CIVIR - Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



102.3 Zoning Bylaw Restrictions; When the 
provisions herein specified for structural strength, 
adequate egress facilities, sanitary conditions, 
equipment, light and ventilation, energy 
conservation or fire safety conflict with the local 
zoning bylaws or ordinances, 780 CMR shall control 
the construction or al. oration of buildings and 
structures unless such bylaws or ordinances are 
promulgated in accordance with the provisions of 
M.G.L. c. 143, § 98 . 

102.4 General bylaw restrictions: When the 
provisions herein specified for structural strength, 
adequate egress facihties, sanitary conditions, 
equipment, light and ventilation, energy 
conservation or fire safety conflict with the local 
general bylaws or ordinances, 780 CMR shall 
control the construction or alteration of buildings 
and structures unless such bylaws or ordinances are 
promulgated in accordance with the provisions 
M.G.L. c. 143, § 98. 

102.5 Applicability to Existing Buildings 

102.5.1 General: Existing buildings and 
structures shall comply with the provisions of 
780 CMR 102.5 and all other applicable 
provisions of 780 CMR. 

102.5.2 Unless specifically provided otherwise in 
780 CMR, any existing building or structure shall 
meet and shall be presumed to meet the provisions 
of the applicable laws, codes, rules or regulations, 
bylaws or ordinances in effect at the time such 
building or structure was constructed or altered 
and shall be allowed to continue to be occupied 
pursuant to its use and occupancy, provided that 
the building or structure shall be maintained in 
accordance with 780 CMR 103,0. 

102.5.3 In cases which applicable codes, rules or 
regulations, bylaws or ordinances were not in use 
at the time of such construction or alteration, the 
provisions of 780 CMR 103.0 shall apply. 

102.5.4 In cases where the provisions of 
780 CMR are less stringent than the applicable 
codes, rules or regulations, bylaws or ordinances 
at the time of such construction or substantial 
alteration, the applicable provisions of 780 CMR 
shall apply, providing such application of these 
provisions does not result in danger to the public, 
as determined by the building official. 

102.5.5 Existing buildings or parts or portions 
thereof which are proposed to be enlarged, 
altered, repaired or changed in use or occupancy 
shpJl comply with the provisions of 780 CMR 34. 

102.5.6 Moved Structures: Buildings or 
structures moved into or within the jurisdiction 
shall comply with the provisions of 780 CMR 34 
provided that any new system shall comply as far 
as practicable with the requirements for new 



structures and provided further that the siting and 
Jire separation distance comply with the 
requirements for new structures. 

780 CMR 103.0 MAINTENANCE 

103.1 General: AUt buildings iLnd structures and a.]i 
parts thereof both existing and new, and all systems 
and equipment therein which are regulated by 
780 CMR shall be maintained in a safe, operable and 
sanitary condition. All service equipment, means of 
egress, devices and safeguards which are required by 
780 CMR in a building or structure, or which were 
required by a previous statute in a building or 
structure, when erected, altered or repaired, shall be 
maintained in good working order. 

103.2 Owner responsibility: The owner, as 
defined in 780 CMR 2, shall be responsible for 
compliance with provisions of 780 CMR 103.0. 

780 CMR 104.0 VALTOITV 
104.1 General: The provisions. of 780 CMR are 
severable, and if any of its provisions shall be held 
unconstitutional or otherwise invalid by any court of 
competent jurisdiction, the decision of such court 
shall not affect or impair any of the remaining 
provisions. 

780 CMR 105.0 OFFICE OF THE 

EMSPECrOR OF BUILDESIGS OR 

BUILDING COMMISSIONER 

105.1 Appointment: The chief administrative 
officer of each city or town shall employ and 
designate an inspector of buildings or building 
commissioner (hereinafter inspector of buildings) as 
well as such other local inspectors as are reasonably 
necessary to assist the inspector of buildings to 
administer and enforce 780 CMR and of M.G.L. 
c. 22, § 13 A and the rules and regulations made 
under the authority thereof The inspector of 
buildings shall report directly to and be solely 
responsible to the appointing authority. 

105.2 Alternate: The inspector of buildings is 
authorized to designate an alternate who shall 
exercise all the powers of the inspector of buildings 
during the temporary absence, disability or conflict 
of interest of the inspector of buildings. Said 
alternate shall be duly qualified pursuant to 
780 CMR 105.3. 

105.3 Qualifications of the Inspector of Buildings: 

In accordance with the provisions of M.G.L. c. 143, 
§ 3, each inspector of buildings shall have had at 
least five years of experience in the supervision of 
building construction or design or in the alternative 
a four year undergraduate degree in a field related to 
building construction or design, or any combination 
of education and experience which would confer 
equivalent knowledge and ability, as determined by 
the BBRS. In addition each inspector of buildings 



14 



780 CMR - Sixth Edition 



2/7/97 (Effective 2/28/97) 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

ADMINISTRATION 



shaU have had general knowledge of the accepted 
requirements for building construction, fire 
prevention, light, ventilation and safe egress; as well 
as a general knowledge of other equipment and 
materials essential for safety, comfort and 
convenience of the occupants of a building or 
structure. 

Each inspector of buildings shall be certified by 
the BBRS in accordance with the provisions of 
780 CMR R7, the Rules and Regulations for the 
Certification of Inspectors of Buildings, Building 
Commissioners and Local Inspectors. 

Municipalities may require additional 
qualifications or experience as are deemed 
necessary. 

105.4 Qualifications of the local inspector: In 

accordance with the provisions of M.G.L. c. 143, 
§ 3, each local inspector shall have had at least five 
years of experience in the supervision of building 
construction or design or in the alternative a two 
year associates degree in a field related to building 
construction or design, or any combination of 
education and experience which would confer 
equivalent knowledge and ability, as determined by 
the BBRS. In addition, such persons shall have had 
general knowledge of the accepted requirements for 
building construction, fire prevention, light, 
ventilation and safe egress; as well as a general 
knowledge of other equipment and materials 
essential for safety, comfort and convenience of the 
occupants of a building or structure. 

Each local inspector shall be certified by the 
BBRS in accordance with the provisions of 
780 CMR R7, the Rules and Regulations for the 
Certification of Inspectors of Buildings, Building 
Commissioners and Local Inspectors. 

Municipalities may require additional 
qualifications or experience as are deemed 
necessary. 

105.5 Reporting Requirements: 

105.5.1 Annual report by city or town clerk: 

In accordance with the provisions of M.G.L. 
c. 143, § 3, the clerk of each city or town shall, 
annually, not later than April first, transmit to the 
BBRS the names and official address of each 
inspector of buildings, building commissioner and 
local inspector as well as at such other times as 
required pursuant to 780 CMR R7, the Rules and 
Regulations for the Certification of Inspectors of 
Buildings, Building Commissioners and Local 
Inspectors. Such reports shall be submitted on 
forms prescribed by the BBRS for said purpose. 

IOS.5.2. New appointments: The clerk of each 
city or town shall additionally report to the BBRS, 
the name, capacity and status of any new 
appointee within the time periods prescribed in 
780 CMR R7 on forms prescribed by the BBRS 
for said purpose. 



105.6 Restriction of employees: No fijU-time or 
part-time building commissioner, inspector of 
buildings, or full-time or part-time local inspector as 
defined herein shall be engaged in, or directly or 
indirectly connected with, the fiamishing of labor, 
materials or appliances for the construction, 
alteration or maintenance of a building or structure, 
or the preparation of plans or of specifications 
therefore within the city, town or region for which 
he or she is appointed, unless he or she is the owner 
of the building or structure; nor shall any officer or 
employee associated with the building department 
engage in any work which conflicts with his or her 
oflBcial duties or with the interests of the department. 

Note: SeeMG.L. c. 143, § 3Z (Local Option law 
relative to part-time employees). 

105.7 Relieffrom personal liability: Insofar as the 
law allows, while acting for the municipality, the 
building official, charged with the enforcement of 
780 CMR shall not be deemed personally liable in 
the discharge of his official duties. 

105.8 Ofllcial records: An official record shall be 
kept of all business and activities of the department 
specified in the provisions of 780 CMR. In 
accordance with the provisions of M.G.L. c. 66, 
§ 10(b), all such records shall be open to public 
inspection at all appropriate times and according to 
reasonable rules to maintain the ihtegrity and 
security of such records. 

780 CMR 106.0 DUTIES AND POWERS OF 
TBE BUILDING OFFICIAL 

106.1 General: The inspector of buildings and local 
inspector (herein after building official) shall 
enforce all of the provisions of 780 CMR, 521 CMR 
(Architectural Access Board) and rmy other state 
statutes, rules and regulations, or ordinances or 
bylaws which empower the building official. The 
building official shall act on any question relative to 
the mode or manner of construction and materials to 
be used in the construction, reconstruction, 
alteration, repair, demolition, removal, installation of 
equipment and the location, use, occupancy and 
maintenance of all buildings and structures, except 
as otherwise specifically provided for by statutory 
requirements or as provided for in 780 CMR 109.0. 

106.2 Applications and permits: The building 
official shall receive applications and issue permits 
for the construction, reconstruction, alteration, 
repair, demolition, removal or change in use or 
occupancy of buildings and structures; inspect the 
premises for which such permits have been issued 
and enforce compliance with the provisions of 
780 CMR. 



2/7/97 (Effective 2/28/97) 



780 CMR - Sixth Edition 



15 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



106.3 Notices and orders: The building official 
shall issue all necessary notices or orders to ensure 
compliance with 780 CMR. 

106.4 Inspections: The building official shall make 
such inspections as deemed necessary to ensure 
compliance with 780 CMR, or the building official 
may accept reports of inspection by qualified agen- 
cies or individuals, which reports shall be in writing 
and be certified by a responsible officer of such 
agency or by the responsible individual. 

106.5 Inspection and certification of specified use 
groups: The building official shaU periodically 
inspect and certify buildings and structures or parts 
thereof in accordance with Table 106. A building or 
structure shall not be occupied or continue to be 



occupied without the posting of a valid certificate of 
inspection where required by Table 106. A 
certificate of inspection as herein specified shall not 
be issued until an inspection is made certifying that 
the building or structure or parts thereof complies 
with aU the applicable requirements of 780 CMR, 
and until the fee is paid as specified in Table 106. 
Municipalities may increase or waive only in their 
entirety for any specific use group the fees as 
specified in said Table 106. 

Exception: Municipalities may revise or modify, 
or waive in part those fees for buildings and 
structures or parts thereof owned by the 
municipality, county or political subdivision 
thereof and for buildings and structures or parts 
thereof used solely for religious purposes. 



TABLE 106 

REQUIRED MINIMUM INSPECTIONS AND CERTIFICATIONS FOR 
(See Chapters 3 and 4 for complete description of use 



SPECIFIED USE GROUPS 
groups) 



Use 
Group 


Use Group 


Use Group Description 


Minimum 
Inspections 


Maximum 

Certification 

Period 


Fees for Maximum 

Certification 

Period 


A-1 


Assembly - Theaters 
over 400 capacity 


With stage and scenery 
Movie Theater 


Semi- Annual 
Semi- Annua] 


One Year 
One Year 


$75 
$75 


A-1 


Assembly - Theaters 
400 or less capacity 


With stage and scenery 
Movie Theater 


Annual 
Annual 


One Year 
One Year 


$40 
$40 


A-2 


Assembly - Night Clubs 
or similar uses 


Over 400 capacity 
400 or less capacity 


Semi Annual 
Annual 


One Year 
One Year 


$75 
$40 


A-3 


Assembly Lecture 
Halls, -recreation centers, 
terminals, etc. 


Over 400 capacity 
400 or less capacity 


Semi Annual 
Annual 


One Year 
One Year 


note a 
$40 


A-4 


Assembly 


Churches, low density, recreation 
& similar uses 


Prior to issuance of 
each new certificate 


Five Years 


$40 


A-5 


Assembly 


Stadiums, bleachers, places of 
outdoor assembly 


Prior to issuance of 
each new certificate 


One Year 


note b 


"A" 


Special Amusement 

Buildings or portions 

thereof 

(780 CMR 413.0) 


Special Amusement Buildings or 
portions thereof 
(780 CMR 413.7) 


Annually prior to 

issuance of a new 

certification 


One Year 


As established by 
the city or town in 
accordance with 
780 CMR 106.5 


E 


Educational 


Educational 


Prior to issuance of 
each new certificate 


One Year 


$40 


E 


Daycare 


Child day care centers 
(see Chapter 4) 


Prior to issuance of 
each new certificate 


One Year 


$40 


1-2 


Institutional 


Inctqjacitated - hospitals, nursing 
homes, mental hospitals, certain 
day care facilities (see Chapter 4) 


Prior to issuance of 
each new certificate 


Two Years 


noted 


1-3 


Institutional 


Restrained - prisons, jails, 
detention centers, etc. 


Prior to issuance of 
each new certificate 


Two Years 


notec 


R-1 


Residential 


Hotels, motels, lodging houses, 
dormitories, etc. (note g) 


Prior to issuance of 
each new certificate 


One Year 


note e 


R-2 


Residential 


Multi family (note g) 


Prior to issuance of 
each new certificate 


Five Years 


note f 


R-1 


Residential Special 
Occupancy 


Detoxification facilities 
(see Chapter 4) 


Prior to issuance of 
each new certificate 


Two Years 


$75 


R-2 


Residential Special 
Occupancy 


Summer camps for children 
(see chapter 4) 


Annual 


One Year 


notch 


R-3or 
R^ 


Residential Special 
Occupancy 


Group Residence 
(see Chapter 4) 


Annual 


One Year 


notch 


R-5 


Residential Special 
Occupancy 


Limited Group Residence 
(see Chapter 4) 


Annual 


One Year 


notch 



16 



780 CMR - Sixth Edition 



1/19/01 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

ADMINISTRATION 

Notes applicable to Table 106 

General: The maximum certification period specified in Table 106 is intended to provide administrative flexibility. 

For those buildings and structures or parts thereof allowing more than one year maximum certification period, the 

building official may determine the length of validity of the certificate issued. For example, a building in the R-2 use 

group could be issued a certificate valid for one, two, three, four or five years. The total amount of fees charged for 

a certificate or certificates issued during the maximum certification period can exceed the fee listed or referenced in 

column 4 of Table 106. For example, if the building official issues a certificate valid for two years for a biiilding in 

the R-2 use group, the fee charged would be 2/5 times the fee per maximum certification period as determined for the 

building in question using the formula in Note f. 

Note a. For buildings or structures, or parts thereof, in the A-3 Use Group categories, with capacities over 400, the 

fee to be charged for the maximum certification period of one year is $75 for accommodations for up to 5,000 persons, 

plus $15 for the accommodations for each additional 1,000 persons or fraction thereof. 

Note b. For all buildings or structures, or parts thereof, in A-5 use group, the fee to be charged for the maximum 

certification period of one year is $40 for seating accommodations for up to 5,000 persons, plus $8 for the 

accommodation for each additional 1,000 persons or fraction thereof. 

Note c. For all buildings and structures, or parts thereof, in the 1-3 use group, the fee to be charged for the maximum 

certification period of two years is $75 for each structure containing up to 100 beds, plus a $2 charge for each 

additional ten beds or fraction thereof over the initial 100 beds. 

Note d. For hospitals, nursing homes, sanitariums, and orphanages in the 1-2 use group, the fee to be charged for the 

maximum certification period of two years is $75 for each structure containing up to 100 beds, plus a $2 charge for 

each additional ten beds or fraction thereof over the initial 100 beds. All other buildings or structures or parts thereof 

in the 1-2 use group classification shall be charged a fee of $75 for a two year maximum certification period. 

Note e. For all buildings and structures or parts thereof in the R- 1 use group, the fee to be charged for the maximum 

certification period of one year shall be $40 for up to five units plus $2 per unit for all over five units. A unit shall 

be defined as follows: 

two hotel guest rooms; 

two lodging house guest rooms; 

two boarding house guest rooms; or 

four dormitory beds 
Note f. For all buildings and structures or parts thereof in the R-2 use group, the fee to be charged for the maximum 
certification period of five years shall be $75, plus $2 per dwelling unit except that three family dwelling units shall 
be exempt from such fees. 

Note g. For purposes of determining the required number of inspections, the maximum certification period, and the 
fees, as specified in Table 106, dormitories are included in the R-1 use group classification rather than the R-2. 
Note h. Summer camps for children in use group R-2 shall be inspected and certified annually prior to the beginning 
of each season. The annual fee shall be $15 for the first 25 residential units: $8 for each additional 25 residential 
units; and $15 for each assembly building or use. (A residential unit for this purpose shall be defined as four beds). 

106.6 Reports by the Building OKicial retained in the official records as long as the building 

tn^^in 4. i i. •4.- A .11. '.L Tu or 5rrHC?Mre to which they relate remains in existence 
106.6.1 Report to Appointing Authority: The , ,, j jf u i 

. ir ■ \ 1, H u •. . .1, • »• unless otherwise provided for by law. 

building official shall submit to the appointing ^ ■' 



authority of the jurisdiction a written report of 
operations in a form and content and at intervals 



780 CMR 107.0 DUTIES AND POWERS OF 
THE STATE iNSPECIOR 



as shall be prescribed by the appointing authority. (MC\ o 14'^ 8 "^Al 

106.6.2 Report to assessors: Pursuant to iqT.I The State Inspector: In every city and town 
M.G.L. c. 143, § 61, the building official shall 739 CMR shall be enforced by the State Inspector of 
give to the assessors of the municipality written the Department of Public Safety, Division of 
notice of the granting of permits for the Inspections, as to any 5fruc?«rei' or iw/Wmg^ or parts 
construction of any buildings or structures, or for thereof that are owned by the Commonwealth or any 
the removal or demolition, or for any substantial departments, commissions, agencies, or authorities 
alteration or addition thereto. Such notice shaU of the Commonwealth. The state inspector shall 
be given within seven days after the granting of have as to such buildings and structures all the 
each permit, and shall state the name of the powers of a building commissioner or inspector of 
person to whom the permit was granted and the buildings. All buildings and structures owned by 
location of the building or structure to be any authority established by the legislature and not 
constructed, reconstructed, altered, demolished or owned by the Commonwealth shall be regulated in 
removed. accordance with 780 CMR 106.0. 

106.6.3 Report to Local United States 

Postmaster: Pursuant to M.G.L. c. 143, § 3X the 107.2 Other responsibilities: The state inspector 

building official shall notify the local United shall make penodic reviews of all local building 

States Postmaster of the issuance of a building inspection practices, provide technical assistance and 

permit authorizing the construction of any advice to the local building officials in the 

building containing ten or more residential units. implementation of 780 CMR, and report in writing 

his findings to the building officials. 
106.7 Department records: The building official 

shall maintain official records of applications 107.3 Review by the Commissioner of Public 

received, permits and certificates issued, inspections Safety: The Commissioner of the Commonwealth 

performed fees collected, reports of inspections, and of Massachusetts, Department of Public Safety shall 

notices and orders issued. Such records shall be establish districts which shall be supervised by a 

1/19/01 780 CMR - Sixth Edition 17 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



state inspector of the Division of Inspections. The 
Commissioner may review, on his own initiative, or 
on the application of any state inspector, any action 
or refusal or failure of action by any building official 
the result of which does not comply with the 
uniform implementation of 780 CMR; and may 
reverse, modify or annul, in whole or in part, such 
action except with respect to the specialized codes, 
provided that an order or action of the Commissioner 
shall not reverse, modify, annul, or contravene any 
order, action, determination, interpretation or any 
decision by the BBRS or the State Building Code 
Appeals Board. 

107.4 Reports: The state inspector shall file with 
the BBRS reports of his periodic reviews and 
recommendations for improvements of building 
inspection practices. The format and due dates for 
these reports shall be determined by the BBRS. 

780 CMR 108.0 RULES AND REGULATIONS 

108.1 Rule making authority: Under authority 
granted by St. 1984, c. 348, as amended, the BBRS 
is empowered in the interest of public safety, health 
and general welfare, to adopt and promulgate rules 
and regulations, and to interpret and implement the 
provisions of 780 CMR to secure the intent thereof 

108.2 Amendments and promulgation of rules: 

In accordance with the provisions of M.G.L. c. 143, 
§ 97, any person may propose amendments to 
780 CMR. Pubhc hearings shall be held in the city 
of Boston in May and November of each year, and 
at such other times and places as the BBRS may 
determine, to consider petitions for such 
amendments. Amendments adopted by the BBRS 
shall be binding and have the full force and effect in 
all cities and towns. 

1083 Activities requiring licenses, registration or 
certification: 

108.3.1 Testing laboratories: A testing 
laboratory, branch laboratory and/or project 
laboratory shall not test concrete and/or concrete 
materials for use in structures subject to 
construction control (780 CMR 116.0) and/or 
controlled materials (780 CMR 17) unless 
licensed by the BBRS in accordance with 
780 CMR and 780 CMR Rl: the Rules and 
Regulations for Licensing of Concrete Testing 
Laboratories. 

108.3.2 Field technicians: A person shall not 
engage in the activities of field testing of concrete 
for use in structures subject to construction 
control (780 CMR 116.0) and/or controlled 
materials (780 CMR 17) unless such person is 
licensed by the BBRS in accordance with 



780 CMR R2: the Rules and Regulations for 
Concrete Testing Personnel. 

1083.3 Manufactured buildings: No individual, 
organization or firm shall be engaged in the 
construction oi manufactured buildings for use in 
the Commonwealth of Massachusetts unless 
approved to construct same by the BBRS in 
accordance with 780 CMR R3. 

108.3.4 Native Lumber: No individual, 
organization or firm shall engage in the 
production of native lumber for use in structures 
within the Commonwealth of Massachusetts 
unless registered by the BBRS in accordance with 
780 CMR and 780 CMR R4: the Rules and 
Regulations Controlling the Use of Native 
Lumber. 

108.3.5 Licensing of Construction Supervisors: 
1083.5.1 Except for those structures governed 
by Construction Control in 780 CMR 116.0, 
effective July 1, 1982, no individual shall be 
engaged in directly supervising persons 
engaged in construction, reconstruction, 
alteration, repair, removal or demolition 
involving any activity regulated by any 
provision of 780 CMR, unless said individual 
is licensed in accordance the Rules and 
Regulations for Licensing Construction 
Supervisors as set forth in 780 CMR R5. 

No person shall be engaged in the 
supervision of the field erection of a 
manufactured building vmless such person is 
hcensed in accordance with 780 CMR R5: The 
Rules and Regulations for the Licensing of 
Construction Supervisors. 

Exception: Any Home Owner performing 
work for which a building permit is required 
shall be exempt from the licensing 
provisions of 780 CMR 108.3.5; provided 
that if a Home Owner engages a person(s) 
for hire to do such work, that such Home 
Owner shall act as supervisor. This 
exception shall not apply to the field 
erection of a manufactured buildings 
constructed pursuant to 780 CMR 35 and 
780 CMR R3. For the purposes of 
780 CMR 108.3.5, a "Homeowner" is 
defmed as follows: Person(s) who owns a 
parcel of land on which he/she resides or 
intends to reside, on which there is, or is 
intended to be, a one or two family dwelling, 
attached or detached structures accessory to 
such use and/or farm structures. A person 
who constructs more than one home in a 
two-year period shall not be considered a 
home owner. 



18 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

ADMINISTRATION 



108.3.5.2 Exemptions from Construction 
Supervisor License requirement: A 

construction supervisor's license is not 
required for: 

1 . roofing, siding, erection of rooftop solar 
collectors, construction of swimming pools, 
the erection of signs, installation of 
replacement windows not involving 
structural modifications, the erection of 
tents; 

2. projects which are subject to 
construction control (section 1 16.0); 

3. agricultural buildings which are not 
open to the public or otherwise made 
available for public use; 

4. Massachusetts registered engineers and 
Massachusetts registered architects 
provided such engineers and/or architects 
comply with the Construction Supervisor 
oversight requirements set forth in 780 
CMR R5 generally and 780 CMR 
R5.2.12, as applicable; 

5. the practice of any trade licensed by 
agencies of the commonwealth (see M.G.L. 
C.112, §81R), provided that any such work 
is within the scope of said license, 
including, but not limited to wiring, 
plumbing gas fitting, fire protection 
systems, pipefitting, HVAC and 
refrigeration equipment. 

1083.5.3 No municipality shall be prohibited 

from requiring a license for those individuals 

engaged in directly supervising persons 

engaged in construction, reconstruction, 

alteration, repair, removal or demolition in 



those categories of building and structures 
for which the BBRS does not require a 
license, provided that those municipalities 
which have estab-lished licensing 
requirements for construction supervisors 
prior to January 1, 1975, may maintain their 
existing licensing requirements. 

108.3.6 Registration of Home Improvement 
Contractors: In accordance with the provisions 
of M.G.L. c. 142A, no home improvement 
contractor, or organization or firm shall be 
involved in the improvement of any existing 
owner occupied one to four family residential 
building unless said home improvement 
contractor has registered with the BBRS in 
accordance with the rules and regulations for the 
registration of Home Improvement Contractors as 
set forth in 780 CMR R6. 

108 J.7 Certification of Inspectors of Buildings, 
Building Commissioners and Local Inspectors; 

The rules and regulations for the Certification of 
Inspectors of Buildings, Building Commissioners 
and Local Inspectors shall be as set forth in 
780 CMR R7. 

108.4 Enforcement: Whoever violates the 
provisions of 780 CMR 108.0 or any rules and 
regulations promulgated hereunder, or who falsifies 
or counterfeits a license, registration or certification 
issued by the BBRS, or who fraudulently issues or 
accepts such a license, registration or certification 
shall be punished as provided in 780 CMR 1 18.0 or 
shall be subject to any other penalty provided for by 
law. 



1 1/27/98 



780 CMR - Sixth Edition 



18.1 



780 CMR: STATE BOARD OF BUE.DING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUtt^DEMG CODE 
NON-TEXT PAGE 



18.2 780 CMR - Sixth Edition 11/27/98 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

ADMINISTRATION 



780 CMR 109.0 APPROVAL 

109.1 Approved materials and equipment: All 

materials, equipment and devices approved by the 
building official shall be constructed and installed in 
accordance with such approval. 

109.2 Used materials and equipment: Used 
materials, equipment and devices which meet the 
minimum requirements of 780 CMR for new 
materials, equipment and devices shall be permitted; 
however, the building official may require 
satisfactory proof that such materials, equipment and 
devices have been reconditioned, tested, and/or 
placed in good and proper working condition prior 
to approval. 

109 J Alternative materials and equipment: 

109.3.1 General: The provisions of 780 CMR 
are not intended to limit the appropriate use or 
installation of materials, appUances, equipment or 
methods of design or construction not specifically 
prescribed by 780 CMR, provided that any such 
alternative has been approved. Alternative 
materials, appliances, equipment or methods of 
design or construction shall be approved when the 
building official is provided acceptable proof and 
has determined that said alternative is satisfactory 
and complies with the intent of the provisions of 
780 CMR, and that said alternative is, for the 
purpose intended, at least the equivalent of that 
prescribed in 780 CMR in quality, strength, 
effectiveness, fire resistance, durability and 
safety. Compliance with specific performance 
based provisions of 780 CMR, in lieu of a 
prescriptive requirement shall also be permitted as 
an alternate. 

109J.2 Evidence submitted: The building 
official may require that evidence or proof be 
submitted to substantiate any claims that may be 
made regarding the proposed alternate. 

1093 J Tests: Determination of acceptance shall 
be based on design or test methods or other such 
standards approved by the BBRS. In the 
alternative, where the BBRS has not provided 
specific approvals, the building official may 
accept, as supporting data to assist in this 
determination, duly authenticated engineering 
reports, formal reports from nationally 
acknowledged testing/ listing laboratories, reports 
from other accredited sources. The costs of all 
tests, reports and investigations required under 
these provisions shall be borne by the applicant. 

109.3.4 Approval by the Construction 
Materials Safety Board: The building official 
may refer such matters to the Construction 
Materials Safety Board in accordance with 
780 CMR 123.0 for approval. 



780 CMR 110.0 APPUCATION FOR PERMIT 

110.1 Permit application: It shall be unlawful to 
construct, reconstruct, alter, repair, remove or 
demolish a building or structure; or to change the 
use or occupancy of a building or structure; or to 
install or alter any equipment for which provision is 
made or the installation of which is regulated by 
780 CMR without first filing a written application 
with the building official and obtaining the required 
permit therefor. 

110.2 Temporary Structures: 

110.2.1 General: A building permit shall be 
required for temporary structures, unless 
exempted by 780 CMR 1 10.3. Such permits shall 
be limited as to time of service, but such 
temporary construction shall not be permitted for 
more than one year. 

110.2.2 Special approval: All temporary 
construction shall conform to the suuctural 
strength, fire safety, means of egress, light, 
ventilation, energy conservation and sanitary 
requirements of 780 CMR as necessary to insure 
the public health, safety and general welfare. 

110.2.3 Termination of approval: The building 
official may terminate such special approval and 
order the demolition of any such consmiction at 
the discretion of the building official. 

110.3 Exemptions: A building permit is not 
required for the following activities, such exemp- 
tion, however, shall not exempt the activity from any 
review or permit which may be required pursuant to 
other laws, by-laws, rules and regulations of other 
jurisdictions (e.g. zoning, conservation, etc.). 

1 . One story detached accessory buildings used 
as tool or storage sheds, playhouses and similar 
uses, provided the floor area does not exceed 120 
square feet. 

2. Fences six feet in height or less. 

3. Retaining walls which, in the opinion of the 
building official, are not a threat to the public 
safety health or welfare and which retain less than 
four feet of unbalanced fill. 

4. Ordinary repairs as defined in 780 CMR 2. 
Ordinary repairs shall not include the cutting 
away of any wall, partition or portion thereof, the 
removal or cutting of any structural beam, column 
or other loadbearing support, or the removal or 
change of any required means of egress, or 
rearrangement of parts of a structure affecting the 
egress requirements; nor shall ordinary repairs 
include addition to, alteration of, replacement or 
relocation of any standpipe, water supply, 
mechanical system, fire protection system, energy 
conservation system or other work affecting 
public health or general safety. 

Note: Also see 780 CMR 903.1 (Exceptions 1. 
and 2.). 



1 1/27/98 



780 CMR - Sixth Edition 



19 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



5. Greenhouses: A building permit or notice to 
the building official is not required for the con- 
struction of greenhouses covered exclusively with 
plastic film (in accordance with St. 1983, c. 671). 
(This exemption does not apply if the greenhouse 
is to be used for large assemblies of people or us- 
es other than normally expected for this purpose.) 

110.4 Form of application: The application for a 
permit shall be submitted in such form as 
determined by the building official but in all cases 
shall contain, as a minimum, the information 
required on the appropriate sample uniform building 
permit application forms in Appendix B. The 
application for a permit shall be accompanied by the 
required fee as prescribed in 780 CMR 1 14.0 and 
the construction documents as required in 780 CMR 
1 10.7 and 1 10.8, where applicable and as required 
by other sections of 780 CMR. 

110^ By whom application is made: Application 
for a permit shall be made by the owner or lessee of 
the building or structure^ or agent of either. If 
application is made other than by the owner, the 
written authorization of the owner shall accompany 
the application. Such written authorization shall be 
signed by the owner and shall include a statement of 
ownership and shall identify the owner's authorized 
agent, or shall grant permission to the lessee to apply 
for the permit. The full names and addresses of the 
owner, lessee, applicant and the responsible officers, 
if the owner or lessee is a corporate body, shall be 
stated in the application. 

Note: It shall be the responsibility of the 
registered contractor to obtain all permits neces- 
sary for work covered by the Home Improvement 
Contractor Registration Law, M.G.L. c. 142A. 
An owner who secures his or her own permits for 
such shall be excluded from the guaranty fund 
provisions as defined in M.G.L. c. 142A. Refer to 
780 CMR R6 and M.G.L. c. 142A for additional 
information regarding the Home Improvement 
Contractor Registration Program. 

110.6 The securing of a building permit by the 
owner, or the owner' s authorized agent, to construct, 
reconstruct, alter, repair, demolish, remove, install 
equipment or change the use or occupancy of a 
building or structure, shall not be construed to 
relieve or otherwise limit the duties and responsibil- 
ities of the licensed, registered or certified individual 
or firm under the rules and regulations governing the 
issuance of such license registration or certification. 

110.7 Construction documents: The application for 
permit shall be accompanied by not less than three 
sets o{ construction documents. The building official 
is permitted to waive, or modify the requirements 
for filing construction documents when the building 
official determines that the scope of the work is of a 



minor nature. When the quality of the materials is 
essential for conformity to 780 CMR, specific 
information shall be given to establish such quality, 
and 780 CMR shall not be cited, or the term "legal" 
or its equivalent used as a substitute for specific 
information. 

110.8 Engineering Details, Reports, Calculations, 
Plans and Specifications: In the application for a 
permit for buildings and structures subject to con- 
struction control in 780 CMR 1 16.0, the construc- 
tion documents shall contain sufficient plans and de- 
tails to fully describe the work intended, including, 
but not limited to all details sufficient to describe the 
structural, fire protection, fire alarm, mechanical, 
light and ventilation, energy conservation, architec- 
tural access and egress systems. The building official 
may require such calculations, descriptions narra- 
tives and reports deemed necessary to fully describe 
the basis of design for each system regulated by 
780 CMR. In accordance with the provisions of 
M.G.L. c. 143, § 54A all plans and specifications 
shall bear the original seal and original signature of 
a Massachusetts registered professional engineer or 
registered architect responsible for the design, except 
as provided in M.G.L. c. 143, § 54A and any 
profession or trade as provided in M.G.L. c. 1 12, 
§ 60L and M.G.L. c. 112, § 8 IR. 

When such application for permit must comply 
with the provisions of 780 CMR 4 or 780 CMR 9 or 
780 CMR 34, the building official shall cause one 
set of construction documents filed pursuant to 
780 CMR 1 10.7 to be transmined simultaneously to 
the head of the local fire department for his file, 
review and approval of the items specified in 
780 CMR 903.0 as they relate to the applicable 
sections of 780 CMR 4, 780 CMR 9 or 780 CMR 
34. The head of the local fire department shall 
within ten working days from the date of receipt by 
him, approve or disapprove such construction 
documents. If the head of the local fire department 
disapproves such construction documents, he or she 
shall do so, in writing citing the relevant sections of 
noncompliance with 780 CMR or the sections of the 
referenced standards of Appendix A. Upon the 
request of the head of the local fire department, the 
building official may grant one or more extensions 
of time for such review provided, however, that the 
total review by said head of the local fire department 
shall not exceed 30 Calendar days. If such approval, 
disapproval or request for extension of time is not 
received by the building official within said ten 
working days, the building official may deem the 
construction documents to be in full compliance with 
the applicable sections of 780 CMR 4,780 CMR 9 
or 780 CMR 34 and, therefore approved by the head 
of the local fire department. 

110.9 Existing Buildings: The application for a 
building permit to reconstruct, alter or change the 
use or occupancy of existing buildings or structures 



20 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

ADMINISTRATION 



which are subject to construction control pursuant to 
780 CMR 116.0, shall be accompanied by a building 
survey where required by 780 CMR 34 and 
Appendix F. 

110.10 Site plan: A site plan shall be filed showing, 
to scale, the size and location of all new construction 
and all existing structures on the site, distances from 
lot lines, the established street grades and the 
proposed finished grades; and it shall be drawn in 
accordance with an accurate boundary line survey. 
In the case of demolition, the site plan shall show all 
construction to be demolished and the location and 
size of all existing structures and construction that 
are to remain on the site or plot. 

110.11 Independent Structural Engineering 
Review: 

110.11.1 As a condition for the issuance of a 
building permit, the structural design of the 
following described structures shall be reviewed 
by an independent structural engineer to verify 
that the design of the primary structure is 
conceptually correct and that there are no major 
errors in the design: 

1 . Buildings which are five stories or more in 
height above the lowest floor, including stories 
below grade. 

2. Buildings which enclose a total volume of 
400,000 cubic feet, including stories below 
grade. The volume shall be measured using 
the outside dimensions of the building. 

3. Structures in Use Group A, or structures 
which are partially in Use Group A, which will 
be used for public assembly of 300 or more 
persons. 

4. Structures of unusual complexity or design 
shall be determined by the BBRS. A building 
official may apply to the BBRS for such a 
determination on a specific structure. 

Exemption:Temporary structures erected for a 
period of one year or less. 

110.11.2 Requirements for the review: The 

independent structural engineering review shall be 
in accordance with the requirements of 
Appendix I. 

110.113 Disputes between the structural 
engineer responsible for the design of the building 
or structure and the structural engineering peer 
shall be resolved by the structural peer review 
advisory committee in accordance with 780 CMR 
125.0. 

110.12 Structures subject to control: In those 
structures subject to control as required in 780 CMR 
1 16.0, affidavits must be submitted with the permit 
application that the individuals and testing laborato- 
ries responsible for carrying out the duties specified 
in 780 CMR 1 16.0 have been licensed by the BBRS. 



110.13 Amendments to application: Subject to the 
limitations of 780 CMR 110.14, amendments to a 
plan, application or other records accompanying the 
same shall be filed prior to the commencement of the 
work for which the amendment to the permit is 
sought or issued. Such amendments shall be deemed 
part of the original application and shall be 
submitted in accordance with 780 CMR 1 10.0. 

110.14 Time limitation of application: An 

application for a permit for any proposed work shall 
be deemed to have been abandoned six months after 
the date of filing, unless such application has been 
diligently prosecuted or a permit shall have been 
issued; except that the building official shall grant 
one or more extensions of time for additional periods 
not exceeding 90 days each if there is reasonable 
cause and upon written request by the owner. 

780 CMR 111.0 PERMITS 

111.1 Action on application: The building official 
shall examine or cause to be examined all applica- 
tions for permits and amendments thereto within 30 
days after filing thereof. If the application or the 
construction documents do not conform to the 
requirements of 780 CMR and all pertinent laws 
under the building official's jurisdiction, the building 
official shall reject such application in writing, 
stating the reasons therefor. If the building official 
is satisfied that the proposed work conforms to the 
requirements of 780 CMR and all laws and 
ordinances applicable thereto, the building official 
shall issue a permit therefor. 

111.2 Zoning: In accordance with the provisions of 
M.G.L. c. 40A or St. 1956, c. 665 as amended, no 
permit for the construction, alteration, change of use 
or moving of any building or structure shall be 
issued if such building or structure or use would be 
in violation of any zoning ordinance or by-law. 

1113 Railroad right-of-way: No permit to build a 
structure of any kind on land formerly used as a 
railroad right-of-way or any property appurtenant 
thereto formerly used by any railroad company in the 
state shall be issued without first obtaining, after 
public hearing, the consent in writing to the issuance 
of such permit from the Secretary of the Executive 
Office of Transportation and Construction, all in 
accordance with M.G.L. c. 40, § 54A. 

111.4 Water Supply: No permit shall be issued for 
the construction of a building or structure which 
would necessitate the use of water therein, unless a 
supply of water is available therefor, either from a 
water system operated by a city, town or district, or 
from a well located on the land where the building or 
structure is to be constructed, or from a water 
corporation or company, as required by M.G.L. 
c. 40, § 54. 



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111.5 Debris: As a condition of issuing a pennit for 
the demolition, renovation, rehabilitation or other 
alteration of a building or structure, M.G.L. c. 40, 
§ 54 requires that the debris resulting therefrom 
shall be disposed of in a properly licensed solid 
waste disposal facility as defined by M.G.L. c. Ill, 
§ 150 A. Signature of the permit applicant, date and 
number of the building permit to be issued shall be 
indicated on a form provided by the building 
department, and attached to the office copy of the 
building permit retained by the building department. 
If the debris will not be disposed of as indicated, the 
holder of the permit shall notify the building official, 
in writing, as to the location where the debris will be 
disposed. 

111.6 Workers' Compensation: No permit shall 
be issued to construct, reconstruct, alter or demolish 
a building or structure until acceptable proof of 
insurance pursuant to M.G.L. c. 152, § 25C(6) has 
been provided to the building official. 

111.7 Hazards to air navigation: Application for 
building new structures or adding to existing 
structures within airport approaches as defined in 
M.G.L. c. 90, §35B and any amendments thereto or 
language substituted therefor, must include a 
certification by the applicant that; 

1. Either a permit from the Massachusetts 
Aeronautics Commission is not required because 
the structure is, or will be; a) In an area subject to 
airport approach regulations adopted pursuant to 
M.G.L. c. 90, §§ 40A through 401, or; b) in an 
approach to Logan International Airport, or; c) 
less than 30 feet above ground level, or; 

2. A permit from the Massachusetts Aeronautics 
Commission is required pursuant to M.G.L. c. 90, 
§ 35B and a copy of said permit is enclosed with 
the application. 

Applications for permits to build a new structure or 
add to an existing structure requiring the filing of a 
Notice of Proposed Construction or Alteration (FA A 
Form 7460-1) with the Federal Aviation 
Commission shall mail a copy of the completed 
FAA Form 7460- 1 to the Massachusetts Aeronautic 
Commission within three business days after 
submitting said form to the FAA. 

111.8 Expiration of permit: Any permit issued 
shall be deemed abandoned and invalid unless the 
work authorized by it shall have been commenced 
within six months after its issuance; however, for 
cause, and upon written request of the owner, one or 
more extensions of time, for periods not exceeding 



six months each, may be granted in writing by the 
building commissioner or inspector of buildings. 
Work under such a permit in the opinion of the 
building commissioner or inspector of buildings, 
must proceed in good faith continuously to 
completion so far as is reasonably practicable under 
the circumstances. It is the sole responsibility of the 
owner to inform, in writing, the building 
commissioner or inspector of buildings of any facts 
which support an extension of time. The building 
commissioner or inspector of buildings has no 
obligation under 780 CMR 111.7 to seek out 
information which may support an extension of time. 
The owner may not satisfy this requirement by 
informing any other municipal and/or state official or 
department. 

For purposes of 780 CMR 111.7 any permit issued 
shall not be considered invalid if such abandonment 
or suspension of work is due to a court order 
prohibiting such work as authorized by such permit; 
provided, however, in the opinion of the building 
commissioner or inspector of buildings, the person 
so prohibited by such court order, adequately 
defends such action before the court. 

111.9 Previous approvals: 780 CMR shall not 
require changes in the construction documents, 
construction or designated use group of a building 
for which a lawful permit has been heretofore issued 
or otherwise lawfully authorized, and the 
construction of which has been actively prosecuted 
within 180 days after the effective date of 780 CMR 
and is completed with dispatch. 

111.10 Signature to permit: The building official's 
signature shall be attached to every permit; or the 
building official shall authorize a subordinate to 
affix such signature thereto. 

111.11 Approved construction documents: When 
the building official has determined that the 
proposed construction conforms to the provisions of 
780 CMR and other applicable laws, by-laws, rules 
and regulations under his/her jurisdiction, the 
building official shall stamp or endorse in writing the 
three sets of construction documents "Approved". 
One set of the approved construction documents 
shall be retained by the building official, one set by 
the head of the local fire department and the other set 
shall be kept at the construction site, open to 
inspection of the building official or an authorized 
representative at all reasonable times. 

111.12 Revocation of permits: The building official 
shall revoke a permit or approval issued under the 



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provisions of 780 CMR in case of any false 
statement or misrepresentation of fact in the 
application or on the plans on which the permit or 
approval was based. 

111.13 Approval in part; The building official may 
issue a permit for the construction of foundations or 
any other part of a building or struclure before the 
construction documents for the whole building or 
structure have been submitted, provided that 
adequate information and detailed statements have 
been filed complying with all of the pertinent 
requirements of 780 CMR. Work shall be limited to 
that work approved by the partial approval and 
fijrther work shall proceed only when the building 
permit is amended in accordance with 780 CMR 
110.13. The holder of such permit for the 
foundation or other parts of a building or structure 
shall proceed at the holder's own risk with the 
building operation and without assurance that a 
permit for the entire building or structure will be 
granted. 

111.14 Posting of permit: A true copy of the 
building permit shall be kept on the site of 
operations, open to public inspection during the 
entire time of prosecution of the work and until the 
completion of the same. 

111.15 Notice of start: At least 24-hour notice of 
start of work under a building permit shall be given 
to the building official. 

780 CMR 112.0 DEMOLITION OF 
STRUCTURES 

112.1 Service connections: Before a building or 
structure is demolished or removed, the owner or 
agent shall notify all utilities having service 
connections within the structure such as water, 
electric, gas, sewer and other connections. A permit 
to demolish or remove a building or structure shall 
not be issued until a release is obtained from the 
utilities, stating that their respective service 
connections and appurtenant equipment, such as 
meters and regulators, have been removed or sealed 
and plugged in a safe manner. 

All debris shall be disposed of in accordance with 
780 CMR 11 1.5. 

112.2 Notice to adjoining owners: Only when 
written notice has been given by the applicant to the 
owners of adjoining lots and to the owners of wired 
or other facilities, of which the temporary removal is 
necessitated by the proposed work, shall a permit be 
granted for the removal of a building or structure. 

112.3 Lot regulation: Whenever a building or 
structure is demolished or removed, the premises 
shall be maintained free from all unsafe or hazardous 
conditions by the proper regulation of the lot, 
restoration of established grades and the erection of 



the necessary retaining walls and fences in 
accordance with the provisions of 780 CMR 33. 

780 CMR 113.0 CONDITIONS OF PERMIT 

113.1 Payment of fees: A permit shall not be issued 
until the fees prescribed in 780 CMR 114.0 have 
been paid. 

113.2 Compliance with code: The permit shall be a 
license to proceed with the work and shall not be 
construed as authority to violate, cancel or set aside 
any of the provisions of 780 CMR or any other law 
or regulation, except as specifically stipulated by 
modification or legally granted variation as 
described in the application. 

113.3 Compliance with permit: All work shall 
conform to the approved application and the 
approved construction documents for which the 
permit has been issued and any approved 
amendments to the approved application or the 
approved construction documents. 

113.4 Compliance with site plan: All new work 
shall be located strictly in accordance with the 
approved site plan. 

780 CMR 114.0 FEES 

114.1 General: A permit to begin work for new 
construction, alteration, removal, demolition or other 
building operation shall not be issued until the fees 
prescribed in 780 CMR 1 14.0 shall have been paid 
to the department of building inspection or other 
authorized agency of the jurisdiction, nor shall an 
amendment to a permit necessitating an additional 
fee be approved until the additional fee has been 
paid. 

114.2 Special fees: The payment of the fee for the 
construction, alteration, removal or demolition for 
all work done in connection with or concurrently 
with the work contemplated by a building permit 
shall not relieve the applicant or holder of the permit 
fi-om the payment of other fees that are prescribed by 
law or ordinance for water taps, sewer connections, 
electrical permits, erection of signs and display 
structures, marquees or other appurtenant 
structures, or fees of inspections, certificates of 
occupancy or other privileges or requirements, both 
within and without the jurisdiction of the department 
of building inspection. 

114.3 New construction and alterations: The fees 
for plan examination, building permit and 
inspections shall be as prescribed in 780 CMR 
114.3.1 and the building official is authorized to 
establish by approved rules a schedule of unit rates 
for buildings and structures of all use groups and 
types of construction as classified and defined in 
780 CMR 1, 3 and 6. 



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114.3.1 Fee schedule: A fee for each plan 
examination, building permit and inspection shall 
be paid in accordance with the fee schedule as 
established by the municipality. 

114.4 Accounting: The building official shall keep 
an accurate account of all fees collected; and such 
collected fees shall be deposited in the jurisdiction 
treasury in accordance with procedures established 
by the municipality, or otherwise disposed of as 
required by law, 

780 CMR 115.0 INSPECTION 

115.1 Preliminary inspection: Before issuing a 
permit, the building official shall, if deemed 
necessary, examine or cause to be examined all 
buildings, structures and sites for which an 
application has been filed for a permit to construct, 
enlarge, alter, repair, remove, demolish or change 
the use or occupancy thereof 

115.2 Required inspections: After issuing a 
building permit, the building official shall conduct 
inspections during construction at intervals sufficient 
to ensure compliance with the provisions of 
780 CMR. The building official shall inform the 
applicant of the required points of inspection at the 
time of application. Upon completion of the work 
for which a permit has been issued, the building 
official shall conduct a final inspection pursuant to 
780 CMR 115.5. A record of all such examinations 
and inspections and of all violations of 780 CMR 
shall be maintained by the building official. For 
buildings and structures subject to construction 
control, the owner shall provide for special 
inspections in accordance with 780 CMR 1705.0. 

In conjunction with specific construction projects, 
the building official may designate specific 
inspection points in the course of construction that 
require the contractor or builder to give the building 
oflBcial 24 hours notice prior to the time when those 
inspections need to be performed. The building 
official shall make the inspections within 48 hours 
after notification. 

115.3 Approved inspection agencies: The building 
official may accept reports of approved inspection 
agencies provided such agencies satisfy the 
requirements as to qualifications and reliability. 

115.4 Plant inspection: Where required by the 
provisions of 780 CMR or by the approved rules, 
materials or assemblies shall be inspected at the 
point of manufacture or fabrication in accordance 
with 780 CMR 1703.3. 

115.5 Final inspection: Upon completion of the 
building or structure, and before issuance of the 
certificate of occupancy required by 780 CMR 
120.0, a final inspection siiall be made. All 



variations of the approved construction documents 
and permit shall be noted and the holder of the 
permit shall be notified of the discrepancies. 

115.6 General: In the discharge of his duties, the 
building official shall have the authority to enter at 
any reasonable hour any building, structure or 
premises in the municipality to enforce the 
provisions of 780 CMR. 

If any owner, occupant, or other person refuses, 
impedes, inhibits, interferes with, restricts, or 
obstructs entry and free access to every part of the 
structure, operation or premises where inspection 
authorized by 780 CMR is sought, the building 
official, or state inspector may seek, in a court of 
competent jurisdiction, a search warrant so as to 
apprise the owner, occupant or other person 
concerning the nature of the inspection and 
justification for it and may seek the assistance of 
police authorities in presenting said warrant. 

115.7 Identification: The building official shall 
carry proper identification when inspecting 
structures or premises in the performance of duties 
under 780 CMR. 

115.8 Jurisdictional cooperation: The assistance 
and cooperation of police, fire, and health 
departments and all other officials shall be available 
to the building official as required in the 
performance of his duties. 

115.9 Coordination of inspections: Whenever in 
the enforcement of 780 CMR or another code or 
ordinance, the responsibility of more than one 
building official of the jurisdiction is involved, it 
shall be the duty of the building officials involved to 
coordinate their inspections and administrative 
orders as fully as practicable so that the owners and 
occupants of the building or structure sha'l not be 
subjected to visits by numerous inspectors or 
multiple or conflicting orders. Whenever an 
inspector from any agency or department observes 
an apparent or actual violation of some provision of 
some law, ordinance or code not within the 
inspector's authority to enforce, the inspector shall 
report the findings to the building official having 
jurisdiction. 

780 CMR 116.0 REGISTERED 

ARCHITECTURAL AND 

PROFESSIONAL ENGINEERING 

SERVICES - CONSTRUCTION CONTROL 

116.1 General: The provisions of 780 CMR 116.0 
define the construction controls required for all 
buildings and structures needing registered 
architectural or registered professional engineering 
services, and delineate the responsibilities of such 
professional services together with those services 
that are the responsibility of the contractor during 
construction. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

ADMINISTRATION 



The following structures are exempt from the 
requirements of 780 CMR 1 16.0; 

1. Any building containing less than 35,000 
cubic feet of enclosed space, measured to the ex- 
terior surfaces of walls and roofs and to the top of 
a ground supported floor, or in the case of a crawl 
space, to the bottom surface of the crawl space. In 
the case of basement floors or levels, the calcula- 
tion of enclosed space shall include such spaces. 

2. Any single or two family dwelling or any 
accessory building thereto; 

3. Any building used exclusively for farm 
purposes (this exemption does not apply if the 
building is to be used for large assemblies of 
people or uses other than farm purposes); and 

4. Retaining walls less than ten feet in heighl at 
all points along the wall as measured from the 
base of the footing to the top of the wall. 

Notwithstanding the exemptions above, professional 
engineering services shall be required for activities 
which are deemed to constitute the practice of 
engineering as defined in M.G.L. c. 112, § 8 ID, 
except as provided in M.G.L. c. 54A and any legally 
required profession or as provided in M.G.L. c. 112, 
§81R. 

116.1.1 Specialized structures requiring 
construction control: Telecommunication towers 
and similar structures are engineered structures 
and shall be subject to the requirements of 
780 CMR 116. 

116.2 Registered architectural and engineering 
services: 

116.2.1 Design: All plans, computations and 
specifications involving new construction, altera- 
tions, repairs, expansions or additions or change 
in use or occupancy of existing buildings shall be 
prepared by or under the direct supervision of a 
Massachusetts registered architect or 
Massachusetts registered professional engineer 
and shall bear his or her original signature and 
seal or by the legally recognized professional 
performing the work, as defined by M.G.L. 
c. 1 12, §81R. Said signature and seal shall signify 
that the plans, computations and specifications 
meet the applicable provisions of 780 CMR and 
all accepted engineering practices. 

116.2.2 Architect/engineer responsibilities 
during construction: The registered architects 
and registered professional engineers who have 
prepared plans, computations and specifications 
or the registered architects or registered 
professional engineers who have been retained to 
perform construction phase services, shall 
perform the following tasks for the portion of the 
work for which they are directly responsible; 

1. Review, for conformance to the design 
concept, shop drawings, samples and other 
submittals which are submitted by the 



contractor in accordance with the requirements 
of the construction documents. 

2. Review and approval of the quality control 
procedures for all code-required controlled 
materials. 

3. Be present at intervals appropriate to the 
stage of construction to become, generally 
familiar with the progress and quality of the 
work and to determine, in general, if the work 
is being performed in a manner consistent with 
the construction documents. 

116.2.3 Structural Tests and Inspections: 

Structural tests and inspection shall be provided in 
accordance with 780 CMR 1705.0. 

116.2.4 Tests and Inspections of non structural 
systems: Tests and inspections of non structural 
systems shall be performed in accordance with 
applicable engineering practice standards or 
referenced standards listed in Appendix A. 

116.3 Construction contractor services: The 

actual construction of the work shall be the 
responsibility of the general contractor as identified 
on the approved building permit and shall involve 
the following: 

1 . Execution of all work in accordance with the 
approved construction documents. 

2. Execution and control of all methods of 
construction in a safe and satisfactory manner in 
accordance with all applicable local, state, and 
federal statutes and regulations. 

3 . Upon completion of the construction , he shall 
certify to the best of his knowledge and belief that 
such has been done in substantial accord with 
780 CMR 116.3 items 1 and 2 and with all 
pertinent deviations specifically noted. 

116.4 On site project representation: When 
applications for imusual designs or magnitude of 
construction are filed, or where reference standards 
require special architectural or engineering 
inspections, the building official may require full- 
time project representation by a registered architect 
or professional engineer in addition to that provided 
in 780 CMR 116.2.2. The project representative 
shall keep daily records and submit reports as may 
be required by the building official. Upon 
completion of the work, the registered architect or 
professional engineer shall file a final report 
indicating that the work has been performed in 
accordance with the approved plans and 780 CMR. 

116.4.1 Building permit requirement: This on- 
site project representation requirement shall be 
determined prior to the issuance of the building 
permit and shall be a requisite for the permit 
issuance. Refusal by the applicant to provide 
such service as required by the building official 
shall result in the denial of the permit. However, 
the applicant may file an appeal as provided in 
780 CMR 122.0. 



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THE MASSACHUSETTS STATE BUILDING CODE 



116.4.2 Fee and costs: All fees and costs related 
to the performance of on-site project 
representation shall be borne by the owner. 

116.5 Building ofTicial responsibility: Nothing 
contained in 780 CMR 1 16.0 shall have the efifect of 
waiving or limiting the building ofBcial's authority 
to enforce 780 CMR with respect to examination of 
the contract documents, including plans, 
computations and specifications, and field 
inspections (see 780 CMR 106.0). 

780 CMR 117.0 WORKMANSHIP 
117.1 General: All work shall be conducted, 
installed and completed in a workmanlike and 
acceptable manner so as to secure the results 
intended by 780 CMR. 

780 CMR ll&O VIOLATIONS 

118.1 Unlawful acts: It shall be unlawful for any 
person, firm or corporation to use, occupy or change 
the use or occupancy of any building or structure or 
to erect, construct, alter, extend, repair, remove, 
demolish any building or structure or any equipment 
regulated by 780 CMR, or cause same to be done, in 
conflict with or in violation of any of the provisions 
of 780 CMR. 

118.2 Notice of violation: The building official shall 
serve a notice of violation or order on the person 
responsible for the erection, construction, alteration, 
extension, repair, removal, demolition or occupancy 
of a building or structure in violation of the 
provisions of 780 CMR, or in violation of a detail 
statement or a plan approved thereunder, or in 
violation of a permit or certificate issued under the 
provisions of 780 CMR. Such order shall be in 
writing and shall direct the discontinuance of the 
illegal action or condition and the abatement of the 
violation. 

118.3 Prosecution of violation: If the notice of 
violation is not complied with in the time period 
specified in said notice of violation, the building 
oflBcial may institute the appropriate proceedings at 
law or in equity to restrain, correct or abate such 
violation or to require the removal or termination of 
the unlawful occupancy of the building or structure 
in violation of the provisions of 780 CMR or of the 
order or direction made pursuant thereto. 

118.4 Violation penalties: Whoever violates any 
provision of 780 CMR, except any specialized code 
referenced herein, shall be punishable by a fine of 
not more than S 1,000 or by imprisonment for not 
more than one year, or both for each such violation. 
Each day during which a violation exists shall 
constitute a separate offense. The building official 
shall not begin criminal prosecution for such 



violations until the lapse of 30 days after the 
issuance of the written notice of violation. 

118.5 Abatement of violation: The imposition of 
the penalties herein prescribed shall not preclude the 
legal officer of the jurisdiction from instituting 
appropriate action to prevent unlawful construction 
or to restrain, correct or abate a violation, or to 
prevent illegal occupancy of a building, structure or 
premises or to stop an illegal act, conduct, business 
or occupancy of a building or structure on or about 
any premises. 

118.6 Notice or orders, service and content: 

Every notice or order authorized by 780 CMR shall 
be in writing and shall be served on the person 
responsible: 

1 . personally, by any person authorized by the 
building official; or 

2. by any person authorized to serve civil 
process by leaving a copy of the order or notice at 
the responsible party's last and usual place of 
abode; or 

3. by sending the party responsibile a copy of the 
order by registered or certified mail return receipt 
requested, if he is within the Commonwealth; or 

4. if the responsibile party's last and usual place 
of abode is unknown, by posting a copy of this 
order or notice in a conspicuous place on or about 
the premises in violation and by publishing it for 
at least three out of five consecutive days in one 
or more newspapers of general circulation 
wherein the building or premises affected is 
situated. 

780 CMR 119.0 STOP WORK ORDER 

119.1 Notice to owner: Upon notice from the 
building official that work on any building or 
structure is being prosecuted contrary to the 
provisions of 780 CMR or in an unsafe and 
dangerous manner or contrary to the approved 
construction documents submitted in support of the 
building permit application, such work shall be 
immediately stopped. The stop work order shall be 
in writing and shall be given to the owner of the 
property involved, or to the owner's agent, or to the 
person doing the work; and shall state the conditions 
under which work will be permitted to resume. 

119.2 Unlawful continuance: Any person who shall 
continue any work in or about the building or 
structure after having been served with a stop work 
order, except such work as that person is directed to 
perform to remove a violation or unsafe condition, 
shall be liable to a fine of not more than $1,000 or 
by imprisonment for not more than one year, or both 
for each such violation. Each day during which a 
violation exists shall constitute a separate offense. 



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ADMINISTRATION 



780 CMR 120.0 CERTIFICATE OF 
OCCUPANCY 

120.1 General: New buildings and structures: A 

building or structure hereafter shall not be used or 
occupied in whole or in part until the certificate of 
use and occupancy shall have been issued by the 
building commissioner or inspector of buildings or, 
when applicable, the state inspector. The certificate 
shall not be issued until all the work has been 
completed in accordance with the provisions of the 
approved permits and of the applicable codes for 
which a permit is required, except as provided in 
780 CMR 120.3. 

120.2 Buildings or structures hereafter altered: 

A building or structure, in whole or in part, altered 
to change from one use group to another; to a 
different use within the same use group; the fire 
grading; the maximum live load capacity; the 
occupancy load capacity shall not be occupied or 
used until the certificate shall have been issued 
certifying that the work has been completed in 
accordance with the provisions of the approved 
permits and of the applicable codes for which a 
permit is required. Any use or occupancy, which 
was not discontinued during the work of alteration, 
shall be discontinued within 30 days after the 
completion of the alteration unless the required 
certificate is issued. 

120.3 Temporary occupancy: Upon the request of 
the holder of a permit, a temporary certificate of 
occupancy may be issued before the completion of 
the entire work covered by the permit, provided that 
such portion or portions shall be occupied safely 
prior to full completion of the building or structure 
without endangering life or public welfare. Any 
occupancy permitted to continue during the work 
shall be discontinued within 30 days after 
completion of the work unless a certificate of 
occupancy is issued by the building official. 

120.4 Contents of certificate: When a building or 
structure is entitled thereto, the building official 
shall issue a certificate oi occupancy within ten days 
after written application. Upon completion of the 
final inspection in accordance with 780 CMR 115.5 
and coaection of the violations and discrepancies, 
and compliance with 780 CMR 903.4, the certificate 
of occupancy shall be issued. The certificate of 
occupancy shall specify the following. 

1. The edition of the code under which the 
permit was issued. 

2. The use group and occupancy, in accordance 
with the provisions of 780 CMR 3. 

3. The type of construction as defined in 
780 CMR 6. 

4. The occupant load per floor. 

5. Any special stipulations and conditions of the 
building permit. 



120.5 Posting structures: 

120.5.1 Posted use and occupancy: A suitably 
designed placard approved by the building official 
shall be posted by the owner on all floors of every 
building and structure and part thereof designed 
for high hazard, storage, mercantile, factory and 
industrial or business use (use groups H, S, M, F 
and B) as defined in 780 CMR 3. Said placard 
shall be securely fastened to the building or 
structure in a readily visible place, stating: the 
use group, the fire grading, the live load and the 
occupancy load. 

120.5.2 Posted occupancy load: A suitably 
designed placard approved by the building official 
shall be posted by the owner in every room where 
practicable of every building and structure and 
part thereof designed for use as a place of public 
assembly or as an institutional building for 
harboring people for penal, correctional, 
educational, medical or other care or treatment, or 
as residential buildings used for hotels, lodging 
houses, boarding houses, dormitory buildings, 
multiple family dwellings (use groups A, I, R-1 
and R-2). Said placard shall designate the 
maximum occupancy load. 

120.5.3 Replacement of posted signs: All 

posting signs shall be furnished by the owner and 
shall be of permanent design; they shall not be 
removed or defaced, and if lost, removed or 
defaced, shall be immediately replaced. 

120.5.4 Periodic inspection for pasting: The 

building official may periodically inspect all 
existing buildings and structures except one and 
two family dwellings for compliance with 
780 CMR in respect to posting; or he may accept 
the report of such inspections from a qualified 
registered engineer or architect or others certified 
by the BBRS; and such inspections and reports 
shall specify any violation of the requirements of 
780 CMR in respect to the posting of floor load, 
fire grading, occupancy load and use group of the 
building or structure. 

780 CMR 121.0 UNSAFE STRUCTURES 

121.1 General: The provisions of 780 CMR 121.0 
are established by M.G.L. c. 143, §§ 6, 7, 8, 9 and 
10. 

121.2 Inspection: The building official 
immediately upon being informed by report or 
otherwise that a building or other structtire or 
anything attached thereto or connected therewith is 
dangerous to life or limb or that any building in that 
city or town is unused, uninhabited or abandoned, 
and open to the weather, shall inspect the same; and 
he shall forthwith in writing notify the owner to 
remove it or make it safe if it appears to him to be 
dangerous, or to make it secure if it is unused, 
uninhabited or abandoned and open to the weather. 



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780 CMR: STATE BOARD OF BUILDrNG REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



If it appears that such building or structure would be 
especially unsafe in case of fire, it shall be deemed 
dangerous within the meaning hereof and the 
building official may affix in a conspicuous place 
upon its exterior walls a notice of its dangerous 
condition, which shall not be removed or defaced 
without authority from him. 

121.3 Removal or making structure safe: Any 

person so notified shall be allowed until 12:00 noon 
of the day following the service of the notice in 
which to begin to remove such building or structure 
or make it safe, or to make it secure, and he shall 
employ sufficient labor speedily to make it safe or 
remove it or to make it secure; but if the public 
safety so requires and if the mayor or selectmen so 
order, the building official may immediately enter 
upon the premises with the necessary workmen and 
assistants and cause such unsafe structure to be made 
safe or demolished without delay and a proper fence 
put up for the protection of passersby, or to be made 
secure. 

121.4 Failure to remove or make structure safe, 
survey board, survey report: If an owner of such 
unsafe structure refiises or neglects to comply with 
the requirements of such notice within the specified 
time limit, and such structure is not made safe or 
taken down as ordered therein, a carefiil survey of 
the premises shall be made oy a board consisting; in 
a city, of a city engineer, the head of the fire 
department, as such term is defined in M.G.L. 
c. 148, § 1, and one disinterested person to be 
appointed by the building official; and, in a town of 
a surveyor, the head of the fire department and one 
disinterested person to be appointed by the building 
official. In the absence of any of the above officers 
or individuals, the mayor or selectmen shall 
designate one or more officers or other suitable 
persons in place of the officers so named as 
members of said board. A written report of such 
survey shall be made, and a copy thereof served on 
such owner. 

121.5 Removal of dangerous or abandoned 
structures: If such survey report as outlined in 
780 CMR 121.4 declares such structure to be 
dangerous or to be unused, uninhabited or 
abandoned, and open to the weather, and if the 
owner continues such refijsal or neglect, the building 
official shall cause it to be made safe or taken down 
or to be made secure; and, if the public safety so 
requires, said building official may at once enter the 
st!-ucture, the land on which it stands or the abutting 
land or buildings, with such assistance as he may 
require, and secure the same; and may remove and 
evict, under the pertinent provisions of M.G.L. 
c. 239, or otherwise, any tenant or occupant thereof; 
and may erect such protection for the public by 
proper fence or otherwise as may be necessary, and 
for this purpose may close a public highway. In the 



case of such demolition, the said building official 
shall cause such lot to be leveled to conform with 
adjacent grades by a inorganic fill. The costs and 
charges incurred shall constitute a lien upon the land 
upon which the structure is located, and shall be 
enforced in an action of contract; and such owner 
shall, for every day's continuance of such refijsal or 
neglect after being so notified, be punished by a fine 
in accordance with 780 CMR 1 18.4. The provisions 
of M.G.L. c. 139, § 3A, paragraph two, relative to 
liens for such debt and the collection of claims for 
such debt shall apply to any debt referred to in this 
section, except that the said building official shall 
act hereunder in place of the mayor or board of 
selectmen. During the time such order is in eff"ect, 
it shall be unlawful to use or occupy such structure 
or any portion thereof for any purpose. 

121.6 Remedy of person ordered to remove a 
dangerous structure or make it safe: 

Notwithstanding the provisions of 780 CMR 122, an 
owner, aggrieved by such order may have the 
remedy prescribed by M.G.L. c. 139, § 2: provided 
that any provision of M.G.L. c. 139, § 2 shall not be 
construed so as to hinder, delay or prevent the 
building official from acting and proceeding under 
780 CMR 121; and provided, further, that this 
section shall not prevent the city or town from 
recovering the forfeiture provided in said 780 CMR 
121.5 from the date of the service of the original 
notice, unless the order is annulled by the jury. 

780 CMR 122.0 BOARD OF APPEALS 
122.1 State Building Code Appeals Board: 

Except for actions taken pursuant to 780 CMR 
121.0, whoever is aggrieved by an interpretation, 
order, requirement, direction or failure to act under 
780 CMR by any agency or official of the city, town 
or region, or agency or official of the State charged 
with the administration or enforcement of 780 CMR 
or any of its rules or regulations, excepting any 
specialized codes, may appeal directly to the State 
Building Code Appeals Board as provided in 
780 CMR 122.0. 

Whoever is aggrieved by an interpretation, order, 
requirement, direction or failure to act under 
780 CMR by any agency or official of a city, town 
or region charged with the administration or 
enforcement of 780 CMR, excepting any specialized 
codes, may appeal directly to the State Building 
Code Appeals Board or may appeal first to a local or 
regional building code appeals board and if 
aggrieved thereby he may then appeal to the State 
Building Code Appeals Board as provided in 
780 CMR 122.0. 

In the event an appeal is taken directly to the State 
Building Code Appeals Board from an 
interpretation, order, requirement or direction, said 
appeal shall be filed as specified in 780 CMR 
122.3.1 with the State Building Code Appeals Board 
not later than 45 days after the service of notice 



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thereof of the interpretation, order, requirement or 
direction. 

In the event the appeal is taken directly to the 
State Building Code Appeals Board for the failure to 
act, the appeal shall be taken not later than 45 days 
after a request to act has been made by the aggrieved 
person in writing and served upon the appropriate 
building official or chief administrative officer of the 
state or local agency which fails to act. 

If the aggrieved person elects to appeal before the 
local or regional building code appeals board, he 
shall not be allowed to enter such appeal with the 
State Building Code Appeals Board until such time 
as the said local or regional board renders a decision, 
unless the reason for appeal to the State Building 
Code Appeals Board is the failure of the local or 
regional board to act. 

122.2 Membership: 

122.2.1 Three member panel: The State 
Building Code Appeals Board (hereinafter 
referred to in 780 CMR 122.0 as the Board) shall 
consist of the membership of the BBRS. The 
chairman of the BBRS shall be Chairman of the 
Board. The Chairman of the Board may designate 
any three members of the Board to act as a three 
member panel to hold any public hearing under 
780 CMR 122.0 and to hear testimony and take 
evidence. The Chairman of the Board shall select 
one of the three members to act as chairman of the 
said three member panel. If a three member panel 
is so designated, the three member panel shall act 
as the Appeals Board and render a decision as 
provided in 780 CMR 122.0. 

122.2.2 Clerk: The administrator of the BBRS 
shall designate a clerk to the BBRS. The clerk 
shall keep a detailed record of all decisions and 
appeals and a docket book on file showing the 
name of each appeal properly indexed and the 
disposition of the appeal. Said docket book shall 
be open to public inspection at all times during 
normal business hours. 

122.2.3 Quorum: A majority of the Board shall 
constitute a quorum if the appeal is heard by the 
entire Board. 

122.3 Appeals procedure for State Building Code 
Appeals Board: 

122.3.1 Entry: Appeals shall be entered on 
forms provided by the BBRS and shall be 
accompanied by an entry fee of $150 or such 
other amounts as may be determined by the BBRS 
fi'om time to time. 

The appeal shall be signed by the appellant or 
his attorney or agent and shall note the name and 
address of the person or agency in whose behalf 
the appeal is taken and the name of the person and 
address wherein service of notice for the appellant 
is to be made. The appeal shall also state in detail 



the interpretation, order, requirement, direction or 
failure to act which are the grounds of the appeals 
as well as the particular section or sections of 
780 CMR which are involved in the appeal and 
the reasons for the appellant advances supporting 
the appeal. 

A copy of the appeal shall be served in 
accordance with 780 CMR 1 18.6 by the appellant 
on the person or state, regional or local agency 
from whose action or inaction the appeal is taken, 
on or before entry of the appeal. An affidavit, 
under oath, that such copy has been served shall 
be filed with the Board forthwith by the appellant. 

122.3.2 Stay of Proceedings: Entry of an appeal 
shall stay all proceedings in fijrtherance of the 
action or failure to act appealed fi"om, unless the 
state, regional or local agency or any person 
charged with the administration or enforcement of 
780 CMR presents evidence and the Board or a 
three member panel or a single member of the 
Board, appointed by the chairman for said 
purpose, finds that upon the evidence presented a 
stay would involve imminent peril to life or 
property. In such an event, stay of all proceedings 
shall be waived or the Board or three member 
panel or single member may order such other 
action necessary to preserve public safety. 

Before waiving the stay or proceedings, the 
Board or three member panel or single member of 
the Board, appointed by the chairman for said 
purpose, shall hold a hearing and give the 
appellant and state, regional or local agency or 
any person claiming that a stay would involve 
imminent peril to life or property, notice in 
writing of the hearing not less than 24 hours 
before said hearing. 

122.3.3 Documents: Upon entry, the clerk shall 
request in writing fi-om the state, city, regional or 
town officer in charge of the matter on appeal, a 
copy of the record and all other papers and 
documents relative to the appeal to be transmitted 
forthwith to the Board. Said state, city, regional 
or town oflScer shall upon receipt of the request of 
the Board transmit forthwith all the papers and 
documents and a copy of the record relating to the 
matter on appeal. 

122.3.4 Hearings: The chairman of the Board 
shall fix a convenient time and place for a public 
hearing. Said hearings shall be held not later than 
30 days after the entry of such appeal, unless such 
time is extended by agreement with the appellant. 
Any such party may appear in person or by agent 
or attorney at such hearing. The chairman or 
clerk shall give notice of the time and place of 
said hearing to all parties to the hearing and to 
anyone else requesting notice in writing at least 
ten days prior thereto. Failure to hold a public 
hearing within 30 days shall not affect the validity 
of the appeal or any decision rendered The 
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conducted under this section shall not be bound 
by strict rules of evidence prevailing in courts of 
law or equity. 

122.3.5 Conduct of Hearing. Hearing shall be 
conducted in accordance with the informal/fair 
hearing rules as set forth in 801 CMR 1.02. 

122.4 Decisions: 

122.4.1 Votes required: If the appeal is 
conducted by a three member panel, then the 
concurrence of two of the three members holding 
the public hearing shall be required. If the appeal 
is conducted by the entire Board, then a majority 
vote of those hearing the case shall be required. 

122.4.2 Standard: The Board or a three member 
panel may vary the application of any provision of 
780 CMR in any particular case, may determine 
the suitability of alternate materials and methods 
of construction, and provide reasonable 
interpretations of the provisions of 780 CMR; 
provided that the Board or a three-member panel 
finds that the decision to grant a variance shall not 
conflict with the general objectives set forth 
M.G.L. c. 143, § 95 or with the general objectives 
of 780 CMR. 

122.4.3 Time for decision: The Board shall 
within 30 days after such hearing, unless such 
time is extended by agreement of the parties, issue 
a decision or order reversing, afErming or 
modifying in whole or in part the order, 
interpretation, requirement, direction or failure to 
act which is the subject matter of the appeal. 

Failure to render a decision within 30 days 
shall not affect the validity of any such decision 
or appeal. 

Notice of and a copy of the decision shall be 
sent by the cleric to all parties to the appeal and 
anyone requesting in writing a copy of the 
decision. 

122.4.4 Contents of decision: All decisions 
shall be in writing and state findings of fact, 
conclusions and reasons for decisions. Every 
decision shall indicate thereon the vote of each 
member and shall be signed by each member 
voting. A decision shall not be considered by any 
person or agency as a precedent for fiiture 
decisions. 

122.4.5 Additional powers: The Board or a 
three member panel may impose in any decision, 
limitations both as to time and use, and a 
continuation of any use permitted may be 
conditioned upon compliance with future 
amendments to 780 CMR. 

122.5 Enforcement: Upon receipt of the decision 
of the Board or a three member panel, the parties to 
the appeal shall take action forthwith to comply with 



the decision unless a later time is specified in the 
decision. 

122.6 Appeals from State Building Code Appeals 
Board: Any person aggrieved by a decision of the 
State Building Code Appeals Board may appeal to a 
court of law or equity in conformance with M.G.L. 
c. 30A, § 14. 

122.7 Local and regional board of appeals: 

122.7.1 Local or regional board of appeals: 

Whoever is aggrieved by an interpretation, order, 
requirement, direction or failure to act under 
780 CMR by any agency or official of a city, 
region or town ;harged with the administration or 
enforcement of 780 CMR or any of its rules and 
regulations may appeal first to the appeals board 
in that city, region or town or to the State 
Building Code Appeals Board as provided in 
780 CMR 122.0. 

In the event an appeal is taken from an 
interpretation, order, requirement or direction, 
said appeal shall be filed with the local or regional 
appeals board not later than 45 days after the 
service of notice thereof of the interpretation, 
order, requirement or direction. 

In the event the appeal is taken for the failure 
to act, the appeal shall be taken not later than 45 
days after a request to act has been made by the 
aggrieved person in writing and served to the 
appropriate building official or chief 
administrative officer of the city, regional or town 
agency which fails to act. 

122.7.2 Membership: Any building code board 
of appeals duly established by ordinance or by 
law or otherwise in a city, region or town and in 
existence on January 1, 1975, shall qualify as a 
local board of appeals under 780 CMR 122.0 
notwithstanding anything to the contrary 
contained herein. However, the procedure and 
rights for appeals for such board of appeals shall 
be governed by 780 CMR. 

If a city, region or town had not duly 
established by ordinance or bylaw or otherwise a 
local or regional building code appeals board 
prior to January 1, 1975, said city, region or town 
may establish a local or regional board of appeals, 
hereinafter referred to as the local board of 
appeals, consisting of five members appointed by 
the chief administrative officer of the city, region 
or town: one member appointed for five years, 
one for four years, one for three years, one for two 
years and one to serve for one year; and thereafter 
each new member to serve for five years or until 
his successor has been appointed. 

122.7.3 Qualifications of local board members: 

Each member of a local board of appeals 
established under 780 CMR 122.7.2 shall have 
had at least five years experience in the 
construction, alteration, repair and maintenance of 



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ADMINISTRATION 



building and building codes. At least one member 
shall be a registered structural or civil 
professional engineer and one member a licensed 
registered architect. 

122.7.4 Chairman of local or regional board: 

The board shall select one of its members to serve 
as chairman and a detailed record of all 
proceedings shall be kept on file in the building 
department. 

122.7.5 Absence of members: During the 
absence of a member of a local board of appeals 
for reason of disability or disqualification, the 
chief administrative officer of the city, region or 
town shall designate a substitute who shall meet 
the qualifications as outlined in 780 CMR 
122.7.3. 

122.7.6 Quorum: A quorum shall be three 
members. 

122.7.7 Procedures: Entry of appeals shall be 
governed by 780 CMR 122.3.1 excepting that a 
city, region or town may set its own entry fee. 

Upon notice of entry of appeal the local 
building commissioner or inspector of buildings 
shall transmit a copy of the record and all the 
papers and documents to the local board of 
appeals. 

Entry of an appeal shall stay all proceedings in 
fiirtherance of the action or fdlure to act appealed 
fi-om, unless the building commissioner or 
inspector of buildings certifies in writing to the 
local board of appeals that a stay would involve 
imminent peril to life or property. Notice in 
writing of such certification by the building 
commissioner or inspector of buildings shall be 
given the appellant at least 24 hours prior to the 
hearing. In such an event a hearing on such stay 
shall be given first priority and be the first matter 
heard by the local board of appeals at its next 
scheduled meeting. The hearing on the appeal 
shall be held as soon as possible thereafter in 
accordance with 780 CMR 122.7.8. 

The local board of appeals may establish its 
own rules for procedure not established herein or 
not inconsistent with 780 CMR or with the 
general objectives set forth in M.G.L. c. 143, 
§95. 

122.7.8 Hearings: All hearings shall be public 
and notice of said hearings shall be advertised in 
a newspaper of general circulation in the city, 
region or town in which the appeal is taken at 
least ten days before said hearing. Notice of the 
hearing, setting forth the date and time of said 
hearing, shall be mailed by the local board of 
appeals to all parties and all those who requested 
notice in writing at least 14 days before said 
hearing. Said hearings shall be held not later than 
30 days after the entry of such appeal, unless such 
time is extended by agreement with the appellant. 
This section as it pertains to notice shall not apply 



to hearings on a stay as provided in 780 CMR 
122.7.7. 

122.7.9 Decisions of local boards: A concurring 
vote of a majority of all the members present shall 
be required for any decision. The local board of 
appeals may vary the application of 780 CMR to 
any particular case, may consider the suitability of 
alternate materials and methods of construction 
and may provide reasonable interpretations of the 
provisions of 780 CMR; provided that the 
decision of the local board shall not conflict with 
the general objectives of 780 CMR or with the 
general objectives of M.G.L. c. 143, § 95. The 
local board of appeals may impose, in any 
decision, limitations both as to time and use, and 
a continuation of any use permitted may be 
conditioned upon compliance with future 
amendments to 780 CMR. 

122.7.10 Time for decision: The board shall 
within 30 days after such hearing, unless such 
time is extended by agreement of the parties, issue 
a decision or order reversing, affirming or 
modifying in whole or in part the order, 
interpretation, requirement, direction or failure to 
act which is the subjert matter of the appeal. 

Failure to render a decision within 30 days 
shall not afifect the validity of any such decision 
or appeal. 

Notice of and a copy of the decision shall be 
sent by the clerk to all parties to the appeal and to 
anyone requesting in writing a copy of the 
decision. 

122.7.11 Contents of decision: All decisions 
shall be in writing and state findings of fact, 
conclusions and reasons for the decisions. Every 
decision shall indicate thereon the vote of each 
member and shall be signed by each member 
voting. Any decision shall not be considered by 
any person or agency as a precedent for future 
decisions. 

122.7.12 Copy of decision: A copy of any 
decision by a local board of appeals shall be 
transmitted to the State Building Code Appeals 
Board within ten days after the rendering of such 
decision. If the State Building Code Appeals 
Board disapproves of the said decision of the local 
board, it may on its own motion appeal from the 
decision of the local board of appeals according to 
780 CMR 122.0 and call for a hearing de novo. 

If the State Building Code Appeals Board does 
not notify the local board in writing within 45 
days from the date of the local board's decision, 
the said decision shall be deemed approved; 
provided that the decision shall not conflict with 
the general objectives of the state building code 
and the objeaives of M.G.L. c. 143, § 95. 

122.7.13 Enforcement of decision: If said 
decision is approved by the State Building Code 
Appeals Board, all parties to the appeal shall take 



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THE MASSACHUSETTS STATE BUILDING CODE 



immediate action in accordance with the decision 
of the local board unless the person aggrieved by 
such decision appeals to the State Building Code 
Appeals Board as provided in 780 CMR 122.0. 

122.7.14 Review: Any person, including the 
State Building Code Appeals Board, aggrieved by 
a decision of the local board of appeals, whether 
or not a previous party to the decision, or any 
municipal officer or official board of the 
municipality, may, not later than 45 days after the 
mailing of the decision of the local board, apply 
to the State Building Code Appeals Board for a 
hearing de novo before the State Board, in 
accordance with the regulations contained in 
780 CMR 122.0. 

780 CMR 123.0 CONSTRUCTION 
MATERIALS SAFETY BOARD 
123.1 Membership: There shall be a board under 
the control of the BBRS called the Construction 
Materials Safety Board, hereafter in 780 CMR 123.0 
called the CMSB which shall consist of nine 
members, one of whom shall be a member of the 
BBRS who shall be ex-officio and a voting member 
of the Board and eight members to be appointed by 
the chairman of the BBRS: one of whom shall be a 
registered professional engineer who is a structural 
engineer; one of whom shall be a registered 
architect; one of whom shall be a representative of 
a commercial testing laboratory; one of whom shall 
be a representative of a public testing laboratory; 
two of whom shall be representatives from the 
construction industry; one of whom shall be a 
member of a university faculty engaged in research 
and teaching in structural materials; and one of 
whom shall be a member of a university faculty 
engaged in research and teaching in the area of 
theoretical and applied mechanics. 

123.2 Duties: The CMSB will review applications 
for registration or licensing of individuals, 
laboratories or firms responsible for the inspection, 
control and testing of construction materials, and 
review applications and pertinent data relevant to all 
materials, devices, products and methods of 
construction not included in 780 CMR; and report to 
the BBRS their recommendations. The CMSB will 
collect information and review cases where 
disciplinary action against an existing license, 
whether an individual, laboratory or firm, has been 
proposed; and make recommendations to the BBRS. 
The BBRS will issue applications, receive payment 
for the review of such applications and approvals, 
registration and licensing fees, and maintain records 
for the efficient dispatch of the duties of the CMSB. 

123.3 Testing and evaluation groups: The BBRS 
shall establish and maintain testing and evaluation 
groups who will have the responsibility of 



administering and directing, under the supervision of 
the BBRS, the testing and controls for evaluating 
individual applicants, laboratories and firms wishing 
to become registered or licensed. 

780 CMR 124.0 FIRE PREVENTIO N -FIRE 
PROTECTION ADVISORY COMMITTEE 

124.1 Constitution of the Fire Prevention - Fire 
Protection Advisory Conmiittee: There shall be a 
Committee under the control of the BBRS called the 
Fire Prevention - Fire Protection Advisory 
Committee, hereinafter called the FPFP Advisory 
Committee which shall consist of 17 members, two 
of whom shall be members of the BBRS; one of 
whom shall be the State Fire Marshal or his 
designee; one of whom shall be the Commissioner of 
the City of Boston Fire Department or his designee; 
all four of whom shall be ex-officio and voting 
members of the Committee, and 12 members to be 
appointed by the chairman of the BBRS for a term of 
one year; two of whom shall be representatives of 
the Fire Chiefs Association of Massachusetts; two of 
whom shall be representatives of the Fire Prevention 
Association of Massachusetts; one of whom shall be 
a representative of the International Municipal 
Signalmen's Association; one of whom shall be a 
member of the State Board of Fire Prevention 
Regulations; one of whom shall be a member of the 
Board of State Examiners of Electricians who 
satisfies the requirements of that Board as a systems 
contractor holding a certificate C license and is 
actively engaged in the business of fire warning 
systems; one of whom shall be a Massachusetts 
building official; one of whom shall be a 
Massachusetts registered Fire Protection Engineer; 
one of whom shall be a Massachusetts registered 
professional engineer or architect; one of whom shall 
be a Massachusetts registered professional engineer 
with specific experience in the design and 
installation of smoke control systems, and; one of 
whom shall be a sprinkler system installer who shall 
be certified by the National Institute for Certification 
in Engineering Technologies (NICET), and; one of 
whom shall be a member proposed jointly by the 
Massachusetts Burglar and Fire Alarm Association 
and the Automatic Fire Alarm Association and the 
Automatic Fire Alarm Association, New England. 

The FPFP Advisory Committee shall elect a 
chairman and a vice chairman and each shall serve 
for a term one year. A member of an agency or 
board of the state shall not be eligible for the office 
of chairman or vice chairman. 

124.2 Purpose: The FPFP Advisory Committee 
shall review and recommend to the BBRS changes to 
780 CMR relating to fire prevention and fire 
protection and more specifically those matters 
contained in 780 CMR 9. 



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ADMINISTRATION 



780 CMR 125.0 STRUCTURAL PEER REVIEW 
ADVISORY COMMITTEE 

125.1 Membership: There shall be a Board under 
the control of the BBRS called the Structural Peer 
Review Advisory Committee, which'shall consist of 
seven members, six of whom shall be professional 
engineers, registered in Massachusetts, each having 
a minimum of ten years of structural design 
experience and shall be appointed by the BBRS 
from nominations submitted by the Boston 
Association of Structural Engineers, the Boston 
Society of Civil Engineers and the American 
Consulting Engineers Council of New England. The 
seventh member shall be the structural engineer 
member of the BBRS who shall serve as chairman 
of said Advisory Board. 

125.2 Quorum: The chairman of said Advisory 
Committee shall appoint three of the members to 
mediate the disputes by a majority vote of the three 



members. 

125J Purpose: The Structural Peer Review 
Advisory Committee shall mediate any unresolved 
disputes between the engineer of record and the 
reviewing engineer which may result from the 
independent structural engineer review specified in 
780CMRU0.il. 

125.4 Procedure: The structural engineer of record 
or the reviewing engineer or the owner or the 
building official shall submit any unresolved 
disputes cited in Appendix 1-5 (3), to the Structural 
Peer Review Advisory Committee on a form 
provided for this purpose. Said Committee shall 
convene a mediation hearing within30 days from the 
receipt of the application and render a decision in 
writing within 30 days following the mediation 
hearing. 



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NON-TEXT PAGE 



34 780 CMR - Sixth Edition 2/7/97 (Effective 2/28/97) 



CHAPTER 2 



DEFINITIONS 



780 CMR 201.0 GENERAL 

201.1 Scope: Unless otherwise expressly stated, the 
following words and terms shall, for the purposes of 
780 CMR, have the meanings shown in 780 CMR 2. 

201.2 Interchangeability: Words used in the 
present tense include the fiiture; words used in the 
masculine gender include the feminine and neuter; 
the singular number includes the plural and the 
plural the singular. 

201.3 Terms deflned in other codes: Where terms 
are not defined in 780 CMR and are defined in the 
plumbing (248 CMR), fire prevention (527 CMR) or 
BOCA mechanical codes or other reference stan- 
dards listed in Appendix A, such terms shall have 
the meanings ascribed to them as in those codes. 

201.4 Terms not defined: Where terms are not 
defined through the methods authorized by 
780 CMR 201.0, such terms shall have the ordinarily 
accepted meanings such as the context implies. 

201.5 Applications of other laws : Nothing herein 
contained shall he deemed to nullify any provisions 
of the zoning by-laws or ordinance of any 
municipality in the Commonwealth of 
Massachusetts insofar as those provisions deal 
exclusively with those powers of regulating zoning 
granted by the provisions ofM. G.I^ c 40 A and 41 
or St 1956, c 665, as amended 

780 CMR 202.0 GENERAL DEFIMTIONS 
Acceleration: See 780 CMR 1612.3. 

Accepted engineering practice: That which 
confonns to accepted principles, tests or standards 
of nationally recognized technical or scientific 
authorities. 

Accessible: See 780 CMR 1101.0. 

Accessible route: See 780 CMR 1101.0. 

Accessory structure: A building, the occupancy of 
which is incidental to that of the main building, 
that is located on the same lot as the main 
building. 

Adaptability: See 780 CMR 1101.0. 

Addition: An increase in building area, aggregate 
floor area, height or number of stories of a 
structure (see 780 CMR 3400.3(4)). 



Admixture: See 780 CMR 1902.0. 

Aerosol: See 780 CMR 307.27 

Aerosol container: See 780 CMR 307.2. 

Aisle accessway: See 780 CMR 1002.0. 

Alarm verification: See 780 CMR 902.0. 

Alteration: A change or modification of a building 
or structure, or the service equipment thereof, 
that affects safety or health and that is not 
classified as an ordinary repair. 

Alternating tread stairway: See 780 CMR 1002.0. 

Alternate Inspector: A person appointed to act in 
the absence of the inspector of buildings or 
building commissioner in case of illness, 
disability, or conflicting interest An alternate 
inspector shall meet or exceed the minimum 
qualifications defined by M.G.L. c 143, § 3 for 
an inspector of buildings/building commissioner 
and shall be certified in accordance with 
780 CMR R7. See also 780 CMR 105.2 

Anchor: See 780 CMR 2102.0. 

Anchor Store: See 780 CMR 402.2. 

Approval: When used in 780 CMR 35 for 
manufactured buildings or building components, 
approved by the State Board of Building 
Regulations and Standards, hereinafter known 
as the BBRS. 

Approved agency: See 780 CMR 1702.0. 

Approved material, equipment and methods: 

Material, equipment and methods evaluated and 
approved (see 780 CMR 109.0). 

Approved rules: The legally adopted rules of the 
code oflBcial (see 780 CMR 106.0). 

Appurtenant structure: A device or structure 
attached to the exterior or erected on the roof of a 
building designed to support service equipment or 
used in connection therewith, or for advertising or 
display purposes, or other similar uses. 

Architectural terra cotta: See 780 CMR 2102.0 

Area, building: See 780 CMR 502.0. 



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35 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



Area, gross cross-sectional: See 780 CMR 2102.0. 

Areaway (form of construction): See 780 CMR 

3203.2. 

Attic: See 780 CMR 1202.0. 
Automatic: See 780 CMR 902.0. 

Automatic fire suppression system: See 780 CMR 

902.0. 

Barricade: See 780 CMR 307.2. 

Base: See 780 CMR 1612.3. 

Base shear: See 780 CMR 1612.3. 

Basement: See 780 CMR 502.0. 

Bay (partof a structure): See 780 CMR 1612.3. 

B.B.RS.: (Massachusetts) Board of Building 
Regulations and Standards. 

Bed joint: See 780 CMR 2102.0. 

Bleachers: See 780 CMR 1002.0. 

Blocked diaphragm: See 780 CMR 2306.2. 

Boiling point: See 780 CMR 307.2. 

Box system: A structural system where the vertical 
load is carried by bearing walls and structural 
framing and where the lateral stability and 
lateral force resisting system consists of shear 
walls or braced walL 

Brick 

Calcium silicate brick (sand lime brick): See 

780 CMR 2102.0. 

Clay or shale: See 780 CMR 2102.0. 
Concrete brick: See 780 CMR 2102.0 
Hollow brick: See 780 CMR 2102.0. 

Building: A structure enclosed within exterior walls 
or firewalls, built, erected and framed of a 
combination of any materials, whether portable 
or fixed having a roof, to form a structure for 
the shelter of persons, animals or property. For 
the purpose of this definition, "roof" shall 
include an awning or similar covering, whether 
or not permanent in nature. The word "building 
shall be construed where the context requires as 
though followed followed by the words "or parts 
thereof". For application of 780 CMR, each 
portion of a building which is completely 
separated from other portions by fire walls 
complying with 780 CMR 707.0 shall be 
considered as a separate building. 



Building Code Enforcement Official: The term 
used to collectively refer ■ to Inspector of 
Buildings, Building Commissioners, and Local 
Inspectors. All building code enforcement 
officials shall meet or exceed the minimum 
qualifications for the position as defined by 
M.G.L. c.143, § 3 and shall be certified in 
accordance with 780 CMR R7. 

Building Commissioner: The Administrative chief 
of the building department in a municipality who 
is charged with the administration and 
enforcement of 780 CMR (See also "Inspector 
of Buildings" and 780 CMR 105.0). All building 
commissioners shall meet or exceed the 
minimum qualifications for the position as 
defined in M. G.L. cl43 § 3 and shall be certified 
in accordance with 780 CMR R7. 

Building Component: Any subsystem, subassembly, 
or other system designed for use in or as part of 
a structure having concealed elements such as 
electrical, mechanical, plumbing and fire 
protection systems and other systems protecting 
health and safety. 

Building, existing: Any structure occupied prior to 
the date of adoption of the appropriate code, or 
one for which a legal building permit has been 
issued. (See also 780 CMR 3400.3.1). For 
purposes of energy conservation requirements, a 
building which has been legally occupied and/or 
used for a period of at least five years. 

Building line: The line established by law, beyond 
which a building shall not extend, except as 
specifically provided by law. 

Building service equipment: The mechanical, 
electrical and elevator equipment including 
piping, wiring, fixtures and other accessories, 
which provides sanitation, lighting, heating, 
ventilation, fire protection and transportation 
facilities essential for the habitable occupancy of 
the building or structure for its designated 
occupancy. 

Building site: The area occupied by a building or 
structure, including the yards and courts required 
for light and ventilation, and such areas that are 
prescribed for access to the street. 

Bulk Merchandizing Retail Building: (See 
780 CMR 426.0.) Mercantile Buildings where 
sales areas contain: 

1. Combustible materials in piles greater 
than 12 feet in height, or combustible 
materials on pallets, in racks or on shelves 
where the top of storage is greater than 12 
feet in height, or 



36 



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780: CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

DEFINITIONS 

2. Combustible materials such as rubber Buttress: See 780 CMR 2102.0. 

tires. Group A plastics, flammable liquids, 

idle pallets and commodities with similar heat Cellar: that portion of a building which is partly 

release characteristics, where the top storage or completely below grade and having at least 'A 

is greater than six feet in height its height below grade. 



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36.2 780 CMR - Sixth Edition 2/20/98 (Effective 3/1/98) 



780: CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

DEFINITIONS 



Cementitious material: See 780 CMR 1902.0. 

Central Station, Central Station Fire Alarm Systen 
and Central Station Services: See NFPA 72, as 
listed in Appendiz A, 

Certificate of approval: A written document from 
the appropriate code official approving an 
action, type of material, and the like. 

Certificate of use and occupancy: The certificate 
issued by the code official which permits the use 
of a building in accordance with the approved 
plans and specifications which certifies 
compliance with provisions of law for the use 
and occupancy of the budding in its several parts 
together with any special stipulations or 
conditions of the building permit. 

Certification: Any manufactured building or 
building component that meets the provisions of 
780 CMR 35 and the rules and regulations 
pursuant thereto and which has been labeled 
accordingly. See also 780 CMR R7 for the 
certification of Building Code Enforcement 
Officials 

Change of use: An alteration by change of use in 
a building heretofore existing to a new use group 
which imposes other special provisions of law 
governing building construction, equipment or 
means of egress. 

Child day care center: Any facility operated on a 
regular basis whether known as a day nursery, 
nursery school, kindergarten, child play school, 
progressive school child development center, or 
preschool, or known under any other name, 
which receives children not of common 
parentage under seven years of age or under 16 
years of age if such children have special needs 
for non-residential custody and care during part 
or all of the day separated from their parents. 
Child day care centers shall not include: any 
part of a public school system; any part of a 
private, organized educational system unless the 
services of such a system are primarily limited to 
a kindergarten, nursery or related preschool 
services; a Sunday school conducted by a 
religious institution; a facility operated by 
religious organization where children are cared 
for during short periods of time while persons 
responsible for such children are attending 
religious services; a family day care home, as 
defined by M.G.L. c. 28A, § 9; an informal 
cooperative arrangement among neighbors or 
relatives; or the occasional care of children with 
or without compensation therefor. 

Chimney: See 780 CMR 2102.0. 



Chimney, masonry: See 780 CMR 2102.0. 

Closed system: See 780 CMR 307.2. 

CMR: Code of Massachusetts Regulations; 
Appendix A contains a listing of various CMR's 
for Massach usetts specialized codes. 

Code official: See "Building Code Enforcement 
Official". 

Combination of municipalities: Any two or more 
cities and/or towns who have agreed to combine 
in order to share costs necessary for the 
administration and enforcement of 780 CMR in 
said cities and/or towns. 

Collar joint: See 780 CMR 2102.0. 

Combustible dusts: See 780 CMR 307.2. 

Combustible fibers: See 780 CMR 307.2. 

Combustible liquids: See 780 CMR 307.2. 

Combustible material: A combustible material is a 
material which cannot be classified as non- 
combustible in accordance with 780 CMR 
704.4.1.1. 

Compliance assurance program: The system, 
documentation and methods for assuring that 
manufactured buildings, building components, 
building systems and manufactured homes, 
including their manufacture, storage transporta- 
tion and assembly, and handling and installa- 
tion, conform with 780 CMR 35 and the rules 
and regulations promulgated pursuant thereto. 

Commercial Building: For purposes of energy 
conservation requirements only, a commercial 
building is any building other than a low-rise 
residential building, as defined in 780 CMR 2.0 
and 780 CMR Appendix J, Section J2.0 (See also 
Low-rise residential building definition.) 

Common path of travel: See 780 CMR 1002.0. 

Compressed gas: See 780 CMR 307.2. 

Concrete: See 780 CMR 1902.0. 

Concrete, reinforced: See 780 CMR 1902.0. 

Connector: See 780 CMR 2102.0. 

Construction documents: All of the written, 
graphic and pictorial documents prepared or 
assembled for describing the design, location and 



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37 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



physical characteristics of the elements of the 
project necessary for obtaining a building permit. 
The construction drawings shall be drawn to an 
appropriate scale. 

Construction, type of: See 780 CMR 602.0. 
Type 1: See 780 CMR 603.0. 
Type 2: See 780 CMR 603.0. 
Type 3: See 780 CMR 604.0. 
Type 4: See 780 CMR 605.0. 
Type 5: See 780 CMR 606.0 

Control area: See 780 CMR 307.2. 

Corridor: See 780 CMR 1002.0. 

Corrosive: See 780 CMR 307.2. 

Court: See 780 CMR 1202.0. 
Inner: See 780 CMR 1202.0. 
Outer: See 780 CMR 1202.0. 

Court width: See 780 CMR 1202.0. 

Cryogenic liquids (flammable or oxidizing): See 

780 CMR 307.2. 

Curb level: See 780 CMR 3203.2. 
Building or wall height: See 780 CMR 3203.2. 

Damper, fire: See 780 CMR 702.0. 

Day care center (child): See "Child day care 
center". 

Deflagration: See 780 CMR 307.2. 

Deluge system: See 780 CMR 902.0. 

Department: (DPS): The Department of Public 
Safety, Division of Inspection. 

Design earthquake: See 780 CMR 1612.3. 

Designated seismic systems: See 780 CMR 1612.3. 

DeUched storage building: See 780 CMR 307.2. 

Detector, heat: See 780 CMR 902.0. 

Detector, smoke: See 780 CMR 902.0. 

Detonation: See 780 CMR 307.2. 



of Massachusetts, and shall be used to treat 
individuals acceptable to the program in 
accordance with 105 CMR 160.000. 

Diaphragm: See 780 CMR 1612.3, 2102.0 and 
2306.2. 

Dimensions, nominal: See 780 CMR 2102.0. 

Dispensing: See 780 CMR 307.2. 

Door assembly, fire: See 780 CMR 702.0. 

Door, fire: See 780 CMR 702.0. 

DPS: See "Department". 

Draftstopping: See 780 CMR 702.0. 

Dumbwaiter: See 780 CMR 30. 

Dwellings 

Boarding house: See 780 CMR 3 10.2. 

Dormitory: See 780 CMR 3 10.2. 

Dwelling unit: See 780 CMR 3 10.2. 

Hotel: See 780 CMR 310.2. 

Motel: See 780 CMR 310.2. 

Multiple-family dwelling; See 780 CMR 310.2. 

Multiple single-family dwelling: See 780 CMR 

310.2, 

One-family dwelling: See 780 CMR 310.2. 

Two-family dwelling: See 780 CMR 310 2. 

Effective height: See 780 CMR 2102.0. 

Elevator: 780 CMR 30 and 524 CMR. 
Freight elevator: See 524 CMR 17.00 
Hand elevator: See 524 CMR 18 00 
Hydraulic elevator: See 524CMR 
Passenger elevator: See 524CMR 17.00 
Power elevator: See 524CMR. 
Sidewalk elevator: See 524CMR 20.00 

Elevator repairs: 780 CMR 30 and 524 CMR. 

Emergency control station: See 780 CMR 416.2. 

Equipment, existing: Any equipment regulated by 
780 CMR which was legally installed prior to the 
eflFective date of 780 CMR, or for which a permit 
to install has been issued. 

Escalator: 780 CMR 30 and 524 CMR. 



Detoxification facility: A facility licensed or Exit: See 780 CMR 1002.0. 
operated by the Department of Public Health, 

Division of Alcoholism in accordance with Exit access: See 780 CMR 1002 
105 CMR 160.000: Acute Care Inpatient 

Substance Abuse Detoxification Treatment Exit discharge: See 780 CMR 1002 
Services issued by the Department of Public 
Health, Division of Alcoholism, Commonwealth Exit discharge, level of See 780 CMR 1002 0. 



38 



780 CMR - Sixth Edition corrected - 9/19/97 (Effective 2/28/97) 



780: CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

DEFINITIONS 
Fireresistance: See 780 CMR 702.0. 



Exit, horizontal: See 780 CMR 1002.0. 
Explosive: See 780 CMR 307.2. 
Exterior envelope: See 780 CMR 1302.0. 
Exterior wall finish: See 780 CMR 1402.0. 
Fabric awning: See 780 CMR 1609.2. 
Fabric canopy: See 780 CMR 1609.2. 
Fabricated item: See 780 CMR 1702.0. 
Fabrication area: See 780 CMR 416.2. 
Fire alarm box, manual: See 780 CMR 902.0. 
Fire area: See 780 CMR 702.0. 
Fire command station: See 780 CMR 902.0. 
Fire detector, automaUc: See 780 CMR 902.0. 



Fireresistance rating: See 780 CMR 702.0. 

Firestopping: See 780 CMR 702.0. 

Fire separation assembly: See 780 CMR 702.0. 

Fire separation distance: The distance in feet 
measured from the building face to the closest 
interior lot line, to the center line of a street or 
public way or to an imaginary line between two 
buildings on the same property. 

Flame spread: See 780 CMR 802.0. 

Flame spread rating: See 780 CMR 802.0. 

Flameresistance: See 780 CMR 802.0. 

Flammable: See 780 CMR 307.2. 

Flammable compressed gas: See 780 CMR 307.2. 



Fire hazard: The potential degree of fire severity Flammable liquids: See 780 CMR 307.2. 
based on the occupancy of a structure, classified 

as high, moderate or low. Flammable solid: See 780 CMR 307.2. 

High: All occupancies which involve the storage, 

sale manufacture or processing of highly Flash point: See 780 CMR 307.2. 
combustible, volatile flammable or explosive 

products which are capable of burning with Floor area, gross: See 780 CMR 1002.0. 
extreme rapidity and produce explosions or large 

volumes of smoke, poisonous fumes or gases in Floor area, net: See 780 CMR 1002.0. 
the event of fire. 

Moderate: All occupancies which involve the Floor finish: See 780 CMR 802.0. 
storage, sale, manufacture or processing of 
materials which are capable of burning with Frame 

moderate rapidity and a considerable volume of Braced: See 780 CMR 1612.3. 

smoke, but which do not produce either poisonous 
fiimes or explosions, in the event of fire. 
Low: All occupancies wiiich involve the storage, 
sale or manufacture of materials that do not 
ordinarily bum rapidly, nor produce excessive 
smoke, poisonous fiimes or explosions in the 
event of fire. 



Fire partition: See 780 CMR 702.0. 

Fire protection: The provision of construction 
safeguards and exit facilities; and the installation 
of fire alarm, fire-detecting and fire-extinguishing 
service equipment to reduce the fire risk, 
including the risk involved in the spread of fire by 
exterior exposure to and from adjoining buildings 
and structure. 

Fire protection rating: See 780 CMR 702.0. 

Fire protection system: See 780 CMR 902.0. 

Fire window: See 780 CMR 702.0. 



Concentrically braced frame: See 780 CMR 

1612.3. 

Eccentrically braced frame: See 780 CMR 

1612.3. 

Diagonal brace: See 780 CMR 1612.3. 

Lateral support members: See 780 CMR 

1612.3. 

Link beam: See 780 CMR 1612.3. 

Link beam end web stiffeners: See 780 CMR 

1612.3. 

Link beam intermediate web stiffener: See 

780 CMR 1612.3. 

Link beam rotation angle: See 780 CMR 

1612.3. 

Intermediate moment frame: See 780 CMR 

1612.3. 

Ordinary moment frame: See 780 CMR 1612.3. 

Space frame: See 780 CMR 1612.3. 

Special moment frame: See 780 CMR 1612.3. 

Frame system 

Building: See 780 CMR 1612.3. 
Dual: See 780 CMR 1612.3. 



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780 CMR - Sixth Edition 



39 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

Moment resisting. See 780 CMR 1612.3. Manlifts: See 524 CMR. 

Garage, private: See 780 CMR 407.2. 
Garage, public: See 780 CMR 408.2. 



Hoisting and elevating equipment, miscellaneous: 

See 524 CMR. 



Grade hallway, grade lobby, grade passageway: 

See 780 CMR 1002.0. 

Grade plane: See 780 CMR 502.0. 

Grandstand: See 780 CMR 1002.0. 

Greenhouse: See 780 CMR 3602. 

Gross leasable area: See 780 CMR 402.2. 

Habitable space: Space in a structure for living, 
sleeping, eating, or cooking. Bathrooms, toilet 
compartments, closets, halls, storage or utility 
space and similar areas are not considered 
habitable space. 

Hazard Index: See 780 CMR 3401.0 

Hazardous materials: See 780 CMR 307.2. 

Hazardous production material (HPM): See 

780 CMR 416.2. 

Head joint: See 780 CMR 2102.0. 

Header (Bonder): See 780 CMR 2102.0. 

Health hazard: See 780 CMR 307.2. 

Heated space: See 780 CMR 1302.0. 

Height: 

Building: See 780 CMR 502.0. 
Court: See 780 CMR 1202.0. 
Story: See 780 CMR 502.0. 
Walls: See 780 CMR 2102.0. 

Hereafter: After the time that 780 CMR becomes 
effective. 

Heretofore: Before the time that 780 CMR became 
effective. 

High-temperature energy source: See 780 CMR 

1612.3. 

Highly toxic: See 780 CMR 307.2. 

Hoist, material platform: See 780 CMR 3002.0. 

Hoisting and conveying equipment, special: See 

524 CMR. 

Automotive lift: See 524 CMR. 
Conveyors: See 524 CMR. 
Freight lift: See 524 CMR. 



Incompatible materials: See 780 CMR 307.2. 

Inspection, special: See 780 CMR 1705. 

Inspector of buildings: The administrative chief of 
the building department in a municipality who is 
charged with the administration and 
enforcement of 780 CMR. (See also "Building 
commissioner and Building Code Enforcement 
Official"). All inspectors of buildings shall meet 
or exceed the minimum qualifications defined by 
M.G.L, c. 143, § 3 and shall be certified in 
accordance with 780 CMR R7. 

Installing Contractor: an individual or firm duly 
licensed to install apparatus, appliances, devices 
or accessories relative to Heating, pumping, 
process piping and refrigeration systems. (See 
780 CMR 280I.2.I and I30I.I.1). 
Master and Journeyman Pipefitters: 

M.G.L. c. 146, §§ 81, 82, 83, 84, 85, 87 and 89. 

528 CMR 10.00, 11.00, and 13.00 
Master and Journeyman Refrigeration 
Technician: 

M.G.L c. 146, § 45A, 81, 82, 83, 84, 85, 86, 

88 and 89. 

528 CMR 10.00, 11.00 and 13.00 
Exception: heating, pumping, process piping 
and refrigeration systems regulated by M.G.L. 
c. 142, §§ 4 and 13, State Board of Examiners 
of Plumbers. 

Inverted pendulum-type structures: See 780 CMR 

1612.3. 

Irritant: See 780 CMR 307.2. 

Jurisdiction: The governmental unit which has a- 
dopted 780 CMR under due legislative authority. 

Label: See 780 CMR 1702.0. 

Light-framed wall with shear panels: See 

780 CMR 1612.3. 

Listed and Listing: Terms referring to equipment 
which is shown in a list published by an approved 
testing agency qualified and equipped for 
experimental testing and maintaining an adequate 
periodic inspection of current productions and 
whose listing states that the equipment complies 
with nationally recognized standards, when 
installed in accordance with the manufacturer's 
installation instructions. 

Load: See 780 CMR 1602.0. 



40 



780 CMR - Sixth Edition 



1 1/27/98 



780: CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

DEFINITIONS 

Dead load: See 780 CMR 1 602.0. Lateral soil load: See 780 CMR 1 602.0. 

Duration of load: See 780 CMR 1602.0. Live load: See 780 CMR 1602.0. 

Earthquake load: See 780 CMR 1602.0. Wind load: See 780 CMR 1602.0. 

Impact load: See 780 CMR 1602.0. 
Internal load: See 780 CMR 1602.0. 



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NON-TEXT PAGE 



40.2 780 CMR -Sixth Edition 2/20/98 (Effective 3/1/98) 



780; CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

DEFINITIONS 



Loadbearing wall system: See 780 CMR 1612.3. 

Local enforcement agency: A department or 
agency in a municipality charged with the 
enforcement of 780 CMR and appropriate 
specialized codes which include, but are not 
limited to, 248 CMR: The State Plumbing and 
Gas Fitting Code, and 527 CMR 12.00: the State 
Electrical Code. 

Local inspector: A person in the municipality who 
assists the building commissioner or inspector of 
buildings in the performance of his or her duties 
and is charged with the enforcement of 
780 CMR. All local inspectors shall meet or 
exceed the minimum qualifications defined by 
M.G.L. c. 143, § 3 and shall be certified in 
accordance with 780 CMR R7. 

Lot: A portion or parcel of land considered as a unit. 

Lot, corner: A lot with two adjacent sides abutting 
upon streets or other public spaces. 

Lot, interior: A lot which faces on one street or with 
opposite sides on two streets. 

Lot line: A line dividing one lot from another, or 
from a street or any public place. 

Lot line, interior: Any lot line other than one 
adjoining a street or public space. 

Lot line, street: The lot line dividing a lot from a 
street or other public way. 

Low-rise residential building: For purposes of 
energy conservation requirements only, 
residential occupancy buildings (R-2, R-3, R-4, or 
R-5) three stories or less in height (Exception: for 
purposes of energy conservation requirements, R- 
1 USE GROUP buildings shall be treated as 
commercial buildings). 

Main windforce-resisting system: See 780 CMR 

16. 

Mall: See 780 CMR 402.2. 

Mall building, covered: See 780 CMR 402.2. 

Manufactured building: Any building which has 
concealed elements, such as electrical, 
mechanical, plumbing, fire protection, 
insulation and other systems affecting health 
and safety, and which is manufactured and 
assembled in manufacturing facilities, on or off 
the building site. Also, any building as defined 
above which does not have concealed elements, 
but which has been approved by the BBRS at the 
request of the manufacturer. 



Masonry: See 780 CMR 2102.0. 

Ashlar facing masonry: See 780 CMR 2102.0. 
Ashlar masonry: See 780 CMR 2102.0. 
Solid masonry: See 780 CMR 2102.0. 

Masonry unit 

Clay: See 780 CMR 2102.0. 
Concrete: See 780 CMR 2102.0. 
Hollow: See 780 CMR 2102.0. 
Solid: See 780 CMR 2102.0. 

Means of egress: See 780 CMR 1002.0. 

Member: 

Primary: See 780 CMR 1902.0. 
Secondary: See 780 CMR 1902.0. 

Membrane: See 780 CMR 3103.2. 

Membrane structures: 
Air-inflated structure: See 780 CMR 3103.2. 
Air-supported structure: See 780 CMR 3103.2. 
Double skin: See 780 CMR 3103.2. 
Single skin: See 780 CMR 3103.2. 
Cable-restrained, air-supported structure: See 
780 CMR 3 103 .2. 

Membrane-covered cable structure: See 
780 CMR 3 103.2. 

Membrane-covered frame structure: See 
780 CMR 3103.2. 

Noncombustible membrane structure: See 
780 CMR 3 103.2. 
Tent: See 780 CMR 3103.2. 

Mezzanine: See 780 CMR 502.0. 

Mobile home: A structure transportable in one or 
more sections, which is eight body feet or more 
in width and is 32 body feet or more in length, 
and which is built on a permanent chassis, and 
designed to be used as a dwelling with 
permanent foundation, when connected to the 
required facilities, and includes the plumbing, 
heating, air-conditioning and electrical systems 
contained therein. 

Mortar: See 780 CMR 2102.0. 

Mortar, surface-bonding: See 780 CMR 2102.0. 

Moving walk: See 780 CMR 30. 

Native lumber: Native lumber is wood processed in 
the Commonwealth of Massachusetts by a mill 
registered in accordance with 780 CMR R4. 
Such wood is ungraded but is stamped or 
certified in accordance with the requirements of 
780 CMR R4. For the purpose of this definition, 
native lumber shall be restricted to the use in 



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41 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

Panel (part of a structure): See 780 CMR 1602.0. 
Particleboard: See 780 CMR 2302.1. 



one- and two-story dwellings, barns, sheds, 
agricultural and accessory buildings and other 
structures when permitted by 780 CMR R4. 



Nominal dimension 

Lumber: See 780 CMR 2302.0. 

Noncombustible: This is a general, relative term. Its 
precise meaning is defined in 780 CMR for 
specific applications. 

Noncombustible building material: See 780 CMR 

704.4.1.1 

Occupancy: The purpose for which a building or 
portion thereof is used. 

Occupancy, change of: A change in the purpose or 
level of activity within a structure that involves a 
change in application of the requirements of 
780 CMR. 

Occupant load: See 780 CMR 1002.0. 

Occupiable space: See 780 CMR 1202.0. 

Occupied: As applied to a building, shall be 
construed as though followed by the words "or 
intended, arranged or designed to be occupied." 

Official Interpretation: A written interpretation of 
any provision of 780 CMR, or to its referenced 
standards listed in Appendix A, except 
specialized codes, made by the BBRS, under 
authority of M.G.L. c 143, § 94(e), or by the 
State Building Code Appeals Board under 
authority of M.G.L. c. 143, § 100. 

Open system: See 780 CMR 307.2. 

Organic peroxide: See 780 CMR 307.2. 

Oriel window: See 780 CMR 3203.2. 

Owner: Every person who alone or jointly or 
severally with others (a) has legal title to any 
building or structure; or (b) has care, charge, or 
control of any building or structure in any 
capacity including but not limited to agent, 
executor, executrix, administrator, administra- 
trix, trustee or guardian of the estate of the 
holder of legal title; or (c) lessee under a written 
letter agreement; or (d) mortgagee in possession; 
or (e) agent, trustee or other person appointed by 
the courts. Each such person is bound to comply 
with the provisions of 780 CMR. 

Oxidizer: See 780 CMR 307.2. 

P-Delta effect: See 780 CMR 1612.3. 



Penthouse: See 780 CMR 1502.1. 

Permit: An official document or certificate issued by 
the authority having jurisdiction which authorizes 
performance of a specified activity (see 780 CMR 
lll.l). 

Person: Includes a corporation, firm, partnership, 
association, organization and any other group 
acting as a unit as well as individuals. It shall 
also include an executor, administrator, trustee, 
receiver or other representative appointed accord- 
ing to law. Whenever the word "person" is used in 
any section of 780 CMR prescribing a penalty or 
fine, as to partnerships or associations, the word 
shall include the partners or members thereof, and 
as to corporations, shall include the officer, agent 
or members thereof who are responsible for any 
violation of such section.. 

Physical hazard: See 780 CMR 307.2. 

Physically disabled person: See 780 CMR II. 

Place of assembly: A room or space accommoda- 
ting 50 or more individuals for religious, recrea- 
tional, educational, political, social or amuse- 
ment purposes, or for the consumption of food 
or drink, including all connected rooms or space 
with a common means of egress and entrance. 

Place of outdoor assembly: Premises used or 
intended to be used for public gatherings of 200 
or more individuals in other than buildings. 

Plastic 

Light-diffusing system: See 780 CMR 2602.0. 
Plastic glazing: See 780 CMR 2602.0. 
Plastic roof panels: See 780 CMR 2602.0. 
Plastic wall panels: See 780 CMR 2602.0. 
Reinforced plastic, glass fiber: See 780 CMR 
2602.0. 

Thermoplastic material: See 780 CMR 2602.0. 
Thermosetting material: See 780 CMR 2602.0. 

Platform: See 780 CMR 412.2. 

Plenum: An enclosed portion of the building 
structure, so designed to allow the movement of air, 
that forms part of an air distribution system. See 
BOCA National Mechanical Code listed in 
Appendix A. 

Pools, S'wimming, hot tubs and spas 

Above-ground/on-ground pool: See 780 CMR 

421.2. 

Barrier: See 780 CMR 42 1 .2. 



42 



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780: CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

DEFINITIONS 



Hot tub: See 780 CMR 42 L2. 
In-ground pool: See 780 CMR 421.2. 



Roof: See 780 CMR 1502.0. 

Roof covering: See 780 CMR 1502.0. 



Private swimming pool: See 780 CMR 42 L2. 

Private swimming pool, indoor: See 780 CMR Roof structure: See 780 CMR 1502.0. 

421.2. 

Private swimming pool, outdoor: See 780 CMR Rubble masonry: See 780 CMR 2102.0. 



421.2. 

Public swimming pool: 

Public outdoor inground swimming pool. Semi- 
public outdoor inground swimming pool: See 

780 CMR 421.2. 

Spa: See 780 CMR 421.2. 

Preaction system: See 780 CMR 902.0. 

Premises: A lot, plot or parcel of land, including any 
structure thereon. 



Coursed rubble: See 780 CMR 2102.0. 
Random rubble: See 780 CMR 2102.0. 
Rough or ordinary rubble: See 780 CMR 

2102.0. 

Running bond: See 780 CMR 2102.0. 
Seismic-resisting system: See 780 CMR 1612.3 
Self-closing: See 780 CMR 702.0. 
Sensitizer: See 780 CMR 307.2. 



Preservative treatment (treated material): See Servicepassage,HPM: See 780 CMR 416.2. 
780 CMR 2302.0. 

Shaft: See 780 CMR 702.0. 

Shall: The term, where used in 780 CMR, shall be 
construed as mandatory. 

Shear wall: See 780 CMR 1612.3. 

Sign: See 780 CMR 3102.2. 

Closed sign: See 780 CMR 3102.2. 
Ground sign: See 780 CMR 3102.2. 
Marquee sign: See 780 CMR 3102.2. 
Open sign: See 780 CMR 3102.2. 
Portable sign: See 780 CMR 3102.2. 
Projecting sign: See 780 CMR 3102.2. 
Roof sign: See 780 CMR 3102.2. 
Temporary sign: See 780 CMR 3 102.2. 
Wall sign: See 780 CMR 3102.2. 

Single membrane penetration: See 780 CMR 
702.0. 
Repairs, ordinary: Any maintenance which does 

not affect the structure, egress, fire protection Site: A parcel of land bounded by a lot line or a 

systems, fire ratings, energy conservation designated portion of a public right-of-way. 

provisions, plumbing, sanitary, gas, electrical or 

other utilities. A building permit is not required Slidescape: See 780 CMR 1002.0. 

for ordinary repairs (also see 780 CMR 903.1, 

Exceptions I and 2). Smoke barrier: See 780 CMR 702.0. 

Required: Shall be construed to be mandatory by Smoke compartment: See 780 CMR 702.0.. 
provisions of 780 CMR. 

Smoke detector, multiple station: See 780 CMR 
902.0. 



Protected construction: See 780 CMR 702.0.. 

Public way: See 780 CMR 1002.0. 

Pyrophoric: See 780 CMR 307.2. 

Radioactive material: See 780 CMR 307.2. 

Registered design professional: An architect or 
engineer registered or licensed to practice profes- 
sional architecture or engineering, as defmed by 
the statutory requirements of the professional 
registration laws of the Commonwealth of 
Massachusetts. 

Repair: The reconstruction or renewal of any part of 
an existing structure for the purpose of its 
maintenance. 



Resilient stable-mounting system: See 780 CMR 

1612.3. 

Restraining device: See 780 CMR 1612.3. 
Elastic: See 780 CMR 1612.3. 
Fixed: See 780 CMR 1612.3. 
Seismic activated: See 780 CMR 1612.3. 



Smoke detector, single station: See 780 CMR 

902.0. 

Smoke detector, system type: See 780 CMR 902.0. 
Smokeproof enclosure: See 780 CMR 1002.0. 



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780 CMR - Sixth Edition 



43 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



HPM cutoff room: See 780 CMR 416.2. 
HPM inside room: See 780 CMR 416.2. 



Specialized code: All building codes, rules or 
regulations pertaining to building construction, 
reconstruction, alteration, repair or demolition 

promulgated by and under the authority of the Story: See 780 CMR 502.0. 
various agencies which have been authorized 

from time to time by the General Court of the Story above grade: See 780 CMR 502.0. 
Commonwealth of Massachusetts. 



Sprinkler: See 780 CMR 902.0 

Sprinkler system, automatic: See 780 CMR 902.0. 

Sprinkler system, limited area: See 780 CMR 

902.0. 

Stack bond: See 780 CMR 2102.0. 

Stage: Sec 780 CMR 412.2. 

Stage, legitimate: See 780 CMR 412.2. 

Stage, regular: See 780 CMR 412.2. 

Stage, thrust: See 780 CMR 412.2. 

Stairway: See 780 CMR 1002.0. 

Standpipe system: See 780 CMR 902.0. 

State Building Code: The Massachusetts State 
Building Code and amendments and rules and 
regulations thereto as promulgated by the State 
Board of Building Regulations and Standards, 
under M.G.L. c. 143 §§ 93 through 100. 

State Inspector: An employee of the Division of 
Inspection, State Department of Public Safety, 
who is charged with administrating and 
enforcing 780 CMR relative to any structure or 
building or parts thereof that are owned by the 
Commonwealth or any departments, 
commissions, agencies or authorities of the 
Commonwealth. The state inspector is also 
charged with supervising the enforcement of 
780 CMR relative to all buildings and structures 
other than those owned by the Commonwealth. 
See also 780 CMR 107.0. 

Steel construction, cold-formed: See 780 CMR 

2202.0. 

Steel joist: See 780 CMR 2202.0. 
Steel member, structural: See 780 CMR 2202.0. 
Stone masonry: See 780 CMR 2102.0. 
Stone masonry, ashlar: See 780 CMR 2102.0. 
Stone masonry, rubble: See 780 CMR 2102.0. 

Storage room, HPM, separate inside: See 

780 CMR 416.2. 



Story drift ratio: See 780 CMR 1612.3. 

Story shear: See 780 CMR 1612.3. 

Street: A public thoroughfare (such as a street, 
avenue or boulevard) which has been dedicated 
for public use. 

Structure: A combination of materials assembled at 
a fixed location to give support or shelter, such as 
a building, framework, retaining wall, tent, 
reviewing stand, platfomi, bin, fences over six 
feet high, sign, flagpole, recreational tramway, 
mast for radio antenna, or the like. The word 
"structure" shall be construed, where the context 
requires, as though followed by the words, "or 
part or parts thereof." 

Structure, existing: A structure erected prior to the 
date of adoption of the appropriate code or one for 
which a legal building permit has been issued. 
See 780 CMR 34 for further information 
regarding existing buildings. 

Supervisory device: See 780 CMR 902.0. 

Through-penetration protection system: See 

780 CMR 702.0. 

Tie, wall: See 780 CMR 2102.0. 

Tile: See 780 CMR 2 102.0. 

Tile, structural clay: See 780 CMR 2102.0. 

Tires, bulk storage of: See 780 CMR 307.2. 

Travel Trailer: A vehicular, portable structure 
built on a chassis and designed to be used for 
temporary occupancy for travel, recreational or 
vocational use; with the manufacturer's perm- 
anent identification "Travel Trailer," thereon; 
and when factory equipped for the road, being of 
any length provided its gross weight does not 
exceed 4500 pounds, or being of any weight pro- 
vided its overall length does not exceed 28 feet. 

Use group: The classification of an occupancy in 
accordance with 780 CMR 302. 1 . 

Vapor retarder: See 780 CMR 1202.0. 

Ventilation: See 780 CMR 1202.0. 



780 CMR - Sixth Edition 



11/27/98 



780: CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

DEFINITIONS 
Vertical opening: See 780 CMR 702.0. Winder: See 780 CMR 1002.0. 



Voice/alarm signaling system: See 780 CMR 
902.0. 

Wall 

Apron wall: See 780 CMR 1402.0. 
Cavity wall: See 780 CMR 2102.0. 
Composite wall: See 780 CMR 2102.0. 
Dry-stacked, surface-bonded walls: See 
780 CMR 2 102.0. 
Faced wall: See 780 CMR 2102.0. 
Fire separation wall: See 780 CMR 702.0. 
Fire wall: See 780 CMR 702.0. 
Foundation wall: See 780 CMR 1812.2. 
Hollow wall: See 780 CMR 2102.0. 
Loadbearing wall: See 780 CMR 1602.1. 
Nonloadbearing wall: See 780 CMR 1602.1. 
Parapet waU: See 780 CMR 2102.0. 
Party waU: See 780 CMR 702.0. 
Retaining wall: See 780 CMR 1812.2. 
Skeleton or panel wall: See 780 CMR 1402.0. 
Spandrel waU: See 780 CMR 1402.0. 
Veneered Wall: See 780 CMR 1402.0 

Water-reactive materials: See 780 CMR 307.2. 

Water supply, automatic: See 780 CMR 902.0. 



Wood shear panel: See 780 CMR 2304.2. 

Writing (written): The term shall be construed to 
include hand-writing, typewriting, printing, photo 
offset or any other foim of reproduction in legible 
symbols or characters. 



Written notice: A notification in writing delivered 
in person to the individual or parties intended; 
or delivered at, or sent by certified or registered 
mail to the last residential or business address of 
legal record. 

Wythe: See 780 CMR 2102.0. 

Yard: See 780 CMR 1202.0. 

Zoning: The reservation of certain specified areas 
within a community or city for buildings and 
structures, or use of land, for certain purposes 
with other limitations such as height, lot coverage 
and other stipulated requirements. (See M.G.L. 
c. 40A and St. 1956, c. 665, as amended.) 



12/12/97 (Effective 8/28/97) 



780 CMR -Sixth Edition 



45 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 
NON-TEXT PAGE 



46 780 CMR - Sixth Edition 2/7/97 (Effective 2/28/97) 



CHAPTERS 



USE OR OCCUPANCY 



780 CMR 301.0 GENERAL 

301.1 Scope: The provisions of 780 CMR 3 shall 
control the classification of all buildings and 
structures as to use group. 

301.2 Application of other laws: The provisions of 
780 CMR 3 shall not be deemed to nullify any 
provisions of the zoning law, ordinance of any 
municipality in the Commonwealth of 
Massachusetts, or any other statute of the 
jurisdiction pertaining to the location or occupancy 
of buildings, except as is specifically required by the 
provisions of 780 CMR. 

780 CMR 302.0 CLASSIFICATION 
302.1 General: All structures shall be classified 
with respect to occupancy in one or more of the use 
groups listed below. Where a structure is proposed 
for a purpose which is not specifically provided for 
in 780 CMR, such structure shall be classified in the 
use group which the occupancy most nearly 
resembles. 



Use Groups A- 1, A-2, 
A-3, A-4 and A-5 
Use Group B 

Use Group E 

Use Groups F-1 and F-2 

Use Groups H-1, H-2, 

H-3 and H-4 

Use Groups I-l, 1-2 and 

1-3 

Use Group M 

Use Groups R-1, R-2, R- 

3,R-4andi;-5 

Use Groups S-1 and S-2 



1. Assembly: 
(see 780 CMR 303.0) 

2. Business: 
(see 780 CMR 304.0) 

3. Educational: 

(see 780 CMR 305.0) 

4. Factory and Industrial: 
(see 780 CMR 306.0) 

5. High Hazard 
(see 780 CMR 307.0): 

6. Institutional: 
(see 780 CMR 308.0) 

7. Mercantile: 

(see 780 CMR 309.0) 

8. Residential: 

(see 780 CMR 3 10.0) 

9. Storage: 
(see 780 CMR 3 11.0) 

10. Utility and Miscellane- Use Group U 
ous (see 780 CMR 312.0) 

302.1.1 Speciflc occupancy areas: Specific 
occupancy areas which are incidental to the main 
use group shall be separated and protected in 
accordance with Table 302.1.1 and shall be 
classified in accordance with the main use group 
of the portion of the building in which the specific 
occupancy area is located. Where the building, or 
portion thereof, containing the specific occupancy 
area is required to be protected with an automatic 
fire suppression system, the separation alternative 
of Table 302.1.1 shall not apply. 

Exception: Specific occupancy areas within 
and serving a dwelling unit are not required to 



comply with 780 CMR 302. 1 . 1 . 

Table 302.1.1 
SPECIFIC OCCUPANCY AREAS 



Rcx}m or area 



Sqjaration /protection 



All use groups: 

Paint shops in occupancies oth- 
er than Use Group F employ- 
ing hazardous materials in' 
quantities less than those which 
cause classification as Use 
Group H 

Waste and soiled linen chute 
access rooms 



- Boiler and Jumace nx>ms 



Incinerator rooms 



Use Groups A. B, E. I-l , R-1 , 
R-2: 

Storage rooms more than 50 

square feet m area but not 

more than 1 00 square feet in 

area 
s : ; ;Sk>rage,rbcims mca« than 

1 00 square ftei: in area 

Physical plant maintenance 
shop and workshop 



Use Groups 1-2. 1-3: 
Boiler and fiimace rooms 

i^BKIi^l^SKnis, kitchens, 
m«x^.^^jf.^^^ — J jocker rooms 



Laundnes greater than 1 00 

square feet in area 
; ;Sttn^ ro<ktis nibre ftan 50 
■'sqnarefeet in area tint not 
: ■ .more than 100 -square feet in 
area 
Storage room£ more than 100 

square feet in area 
iPhydcal plant mmntenance 



Use Group 1-2: 

Gift/retail shops and laborator- 
ies employing hazardous 
quantities less than those which 
cause classification as Use 
Group H 

Use Group 1-3 padded cells 



2 hours; or 1 hour and 
automatic fuie sup- 
pression system 



1 li£>ur and automatic fire 
:; suppre33t<ai.q«tem \ 

1 hour 

1 hour,^3r automatic fire 

suRjression.^fsteni 

2 hours and automatic fire 

suppression system 

1 hour, or automatic fire 
suppression system 
with smoke partitions 



Automalicfire suppres- 
sion system with smoke 
partitions 
2 hours; or 1 hour and au- 
tomatic fire suppression 
system 

1 hour and automatic fire 
suppression system 

1 hour, or automatic fire 
suppression system with' 
smokepardtians 

I hour and automatic fire 
suppression system 

AutomitTc fire suppres- 
sion system witli smoke „ 
partitions 

1 hour and automatic fire 

suppression system 
1 hour and automatic fire 
; sujjpression system 

1 hour, or automatic fue 
suppression system with 
smoke partitions 



1 hour and automatic fire 
system 



Note a. For requirements for faeresistance rated 
separations and smoke partitions see 780 CMR 302. ! . ! . ! . 
Note b. 1 square foot = 0.093 m" 



9/19/97 ^Effective 2/28/97) - corrected 780 CMR - Sixth Edition 



47 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



302.1.1.1 Separation: Where Table 302.1.1 
requires a fireresistance rated separation, the 
specific occupancy area shall be separated from 
the remainder of the building with fire 
separation assemblies (see 780 CMR 709.0). 
Where Table 302.1.1 requires smoke partitions, 
the smoke partitions shall be constructed of 
materials consistent with the type of 
construction and shall be capable of resisting 
the passage of smoke. The smoke partitions 
shall extend from the floor to the underside of 
the fireresistance rated floor/ceiling or 
roofceiling assembly or to the underside of the 
floor or roof deck above. All doors shall be self- 
closing or automatic-closing upon detection of 
smoke. 

302.1.2 Accessory areas: Except for accessory 

areas of Use Group H in accordance with 

780 CMR 302.1.2.1 and specific occupancy areas 

indicated in 780 CMR 302.1.1, where the area 

devoted to an accessory occupancy does not 

occupy more than 10% of any_^7-e area nor more 

than 10% of the allowable area permitted by 

780 CMR 503.0 based on the accessory use group, 

afire separation assembly shall not be required 

between the main use group and accessory areas. 

The required type of construction and the 

automatic fire suppression requirements in 

780 CMR 904.0 shall be based on the main use 

group of the^re area. 

302.1.2.1 High-hazard uses: In buildings that 

are three stories or less in height and equipped 

throughout with an automatic suppression 

system in accordance with 780 CMR 9, an 

occupancy in Use Group F or S is permitted to 

have accessory areas of Use Group H-2, H-3 or 

H-4, provided that such areas do not occupy 

more than 10% of any_/jre area nor more than 

10% of the allowable area permitted by 

780 CMR 503.0 based on the use group of the 

accessory area. h.fire separation assembly shall 

not be required between the F or S use group 

and the accessory H use group. The maximum 

quantity of hazardous materials within the 

accessory H use group shall not exceed twice 

the permitted exempt amount specified in Table 

307.8(1 ) or Table 307.8(2). The required type of 

construction shall be based on the main use 

group of they?re area. 

302.2 Mixed use: All buildings and structures that 
include more than one use group shall be further 
designated as a mixed use and shall comply with 
780 CMR 313.0. Specific occupancy areas and 
accessory areas complying with 780 CMR 302. 1 . 1 
and 302.1.2, respectively, shall be classified in 
accordance with the main use group. 



780 CMR 303.0 ASSEMBLY USE 
GROUPS 

303.1 General: All structures which are designed or 
occupied for the gathering together of persons for 
purposes such as civic, social or religious fiinctions, 
recreation, food or drink consumption or awaiting 
transportation, shall be classified as Use Group A-1, 
A-2, A-3, A-4 or A-5. A room or space used for 
assembly piuposes by less than 50 persons and 
which is accessory to another use group shall be 
included as a part of that main use group. Other 
buildings or structures which accomodate less than 
50 but would otherwise qualify as places of 
assembly, shall be classified in Use Group B. The 
term "Use Group A" shall include Use Groups A-1, 
A-2, A-3, A-4 and A-5. 

303.2 Use Group A-1, theaters: This use group 
shall include all theaters and all other buildings and 
structures intended for the production and viewing 
of performing arts or motion pictures; and which are 
usually provided with fixed seats-including theaters, 
motion picture theaters and television and radio 
studios admitting an audience. Stages and platforms 
shall comply with 780 CMR 412.0. 

303.3 Use Group A-2 structures: This use group 
shall include all buildings and places of public 
assembly, without theatrical stage accessories, 
designed for occupancy as dance halls, nightclubs 
and for similar purposes, including all rooms, 
lobbies and other spaces connected thereto with a 
common means of egress and entrance. 

303.4 Use Group A-3 structures: This use group 
shall include all buildings with or without an 
auditorium in which persons assemble for 
amusement, entertainment or recreation purposes as 
well as incidental motion picture, dramatic or 
theatrical presentations, lectures or other similar 
purposes without theatrical stage other than a raised 
platform; and which are principally occupied 
without permanent seating facilities, including art 
galleries, exhibition halls, museums, lecture halls, 
libraries, restaiurants other than nightclubs, and rec- 
reation centers; and buildings designed for similar 
assembly purposes, including passenger terminals. 

303.5 Use Group A-4 structures: This use group 
shall include all buildings and structures which are 
occupied exclusively for the purpose of worship or 
other religious services. 

303.6 Use Group A-5, outdoor assembly: This use 
group shall include structures utilized for outdoor 
assembly intended for participation in or reviewing 
activities, mdndimg grandstands (780 CMR 1013.0), 
bleachers (780 CMR 1013.0), coliseums, stadiums, 
amusement park structures (780 CMR 413.0) and 
fair or carnival structures. Such structures shall 
comply with all pertinent provisions of 780 CMR. 



48 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USE OR OCCUPANCY 



780 CMR 304.0 BUSINESS USE GROUP 

304.1 General: All buildings and structures which 
are occupied for the transaction of business, for the 
rendering of professional services, or for other 
services that involve stocks of goods, wares or 
merchandise in limited quantities which are 
incidental to office occupancies or sample purposes, 
shall be classified as Use Group B. (Also see 
780 CMR 303.1.) 

304.2 List of business occupancies: The 

occupancies listed in Table 304.2 are indicative of 
and shall be classified as Use Group B. 

Table 304.2 
BUSINESS OCCUPANCIES 



Airport traffic control 

towers 

Animal hospitals, kennels, 

pounds 
Automobile and other 
motor vehicle showrooms 
Banks 

Barber shops 
Beauty shops 
Car wash 

Civic administration 
Clinic, outpatient 
Dry-cleaning; pickup and 

delivery stations and 

self-service 
Electronic data processing 



Fire stations 
Florists and nurseries 
Laboratories; testing and 

research 
Laundries; pickup and 

delivery stations and 

self-service 
Police stations 
Post offices 
Print shops 

Professional services; attor- 
ney, dentist, physician, 

engineer, etc. 
Radio and television 

stations 
Telecommunications 

equipment building 



780 CMR 305,0 EDUCATIONAL USE 
GROUP 

305.1 General: All structures other than those 
occupied for business training or vocational training, 
which accommodate more than five persons for 
educational purposes through the 12th grade, shall 
be classified as Use Group E. 

Exception: A room or space occupied for 
educational piuposes by less than 50 persons, five 
years of age or more, and which is accessory to 
another use group shall be classified as a part of 
the main use group. 

305.1.1 Day care facilities: A child day care 
center which provides care for children more 
than two years nine months shall be classified as 
use Group E. 

305.2 Business or vocational training: Structures 
occupied for business training or vocational training 
shall be classified in the same use group as the 
business or vocation taught. 

780 CMR 306.0 FACTORY AND 
INDUSTRIAL USE GROUPS 
306.1 General: All structures in which occupants 
are engaged in work or labor in the fabricating, 
assembling or processing of products or materials, 
shall be classified as Use Group F-1 or F-2. This 
includes, among others, factories, assembling plants. 



industrial laboratories and all other industrial and 
manufacturing occupancies. The term "Use Group 
F" shall include Use Groups F-1 and F-2. 

306.2 Use Group F-1 structures: Factory and 
industrial occupancies which are not otherwise 
classified as low-hazard. Use Group F-2, shall be 
classified as a moderate-hazard factory and 
industrial occupancy. Use Group F-1. The 
manufacturing processes listed in Table 306.2 are 
indicative of and shall be classified as Use Group F- 
1. 

Table 306.2 

MODERATE-HAZARD FACTORY AND 

INDUSTRIAL OCCUPANCIES 



Aircraft 

Appliances 

Athletic equipment 

Automobiles and other motor 
vehicles 

Bakeries 

Beverages, alcoholic 

Bicycles 

Boat building 

Boiler works 

Brooms or brushes 

Business machines 

Cameras and photo equipment 

Canneries, including food 
products 

Clothing 

Condensed and powdered 
milk manufacture 

Construction and agricultural 
machinery 

Disinfectants 

Dry cleaning using other than 
flammable liquids in clean- 
ing or dyeing operations or 
other than classified in 780 
CMR 307.0 

Electric light plants and 

power houses 

Electrolytic reducing works 

Electronics 

Engines, including rebuilding 



Film, photographic 

Food processing 

Furniture 

Hemp and jute products 

Laundries 

Leather and tanneries, ex- 
cluding enameling or 
japanning 

Machinery 

Millwork and woodworking, 
wood distillation 

Motion picture and television 
filming 

Musical instruments 

Optical goods 

Paper mills or products 

Plastic products 

Printing or publishing 

Recreational vehicles 

Refuse incinerators 

Shoes 

Soaps and detergents 

Sugar refineries 

Textile mills, including 
canvas, cotton, cloth, 
bagging, burlap, carpets 
and rags 

Tobacco 

Trailers 

Upholstery and manufacturing 
shops 



3063 Use Group F-2 structures: Factory and 
industrial occupancies which involve the fabrication 
or manufacturing of noncombustible materials that, 
during finishing, packing or processing, do not 
contribute to a significant fire hazard, shall be 
classified as Use Group F-2. The manufacturing 
processes listed in Table 306.3 are indicative of and 
shall be classified as Use Group F-2. 

Table 306.3 

LOW-HAZARD FACTORY AND 

INDUSTRIAL OCCUPANCIES 



Beverages, nonalcoholic 

Brick and masonry 

Ceramic products 

Foundries 

Glass products 



Gypsum 

Ice 

Metal fabrication and 

assembly 
Water pumping plants 



12/12/97 (Effective 8/28/97) 



780 CMR - Sixth Edition 



49 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



780 CMR 307.0 fflGH-HAZARD USE 
GROUPS 

307.1 General: All structures which are occupied 
for the manufacturing, processing, generation, 
storage or other use of hazardous tnaterials in 
excess of the exempt quantities specified in 
780 CMR 307.8 shall be classified as Use Group H- 
1, H-2, H-3 or H-4 in accordance with the hazards 
presented by each material as described in 780 CMR 
307.3 through 307.6. The term "Use Group H" shall 
include Use Groups H-1, H-2, H-3 and H-4. 

307.1.1 Information required: Separate floor 
plans shall be submitted for buildings and 
structures with an occupancy in Use Group H, 
identifying the locations of anticipated contents 
and processes so as to reflect the nature of each 
occupied portion of every building and structure. 
A report identifying all hazardotts materials 
including, but not limited to, materials of Use 
Group H to be stored or utilized, shall be 
submitted and the methods of protection fi-om 
such hazards shall be indicated on the 
construction documents. 

307.2 DeHnitions: The following words and terms 
shall, for the purposes of 780 CMR 3 and as used 
elsewhere in 780 CMR, have the meanings shown 
herein. 

Aerosol: A product that is dispensed from an 
aerosol container by a propellant. 

Aerosol container: Metal cans, glass or plastic 
bottles designed to dispense an aerosol. Metal 
cans shall be limited to a maximum size of 33.8 
fluid ounces (1000 ml). Glass or plastic bottles 
shall be limited to a maximum size of four fluid 
ounces (118 ml). 

Barricade: A structure that consists of a 
combination of walls, floor and roof, which is 
designed to withstand the rapid release of energy 
in an explosion and which is fiiUy confined, 
partially vented or fiiUy vented; or other effective 
method of shielding from explosive materials by 
a natural or artificial barrier. 

Boiling point: The temperature at which the vapor 
pressure of a liquid equals the atmospheric 
pressure of 14.7 pounds per square inch (psia) or 
760 mm of mercury. Where an accurate boiling 
point is unavailable for the material in question, 
or for mixtures which do not have a constant 
boiling point, for the purposes of this 
classification, the 10% of a distillation performed 
in accordance with ASTM D86 listed in 
Appendix A shall be used as the boiling point of 
the liquid. 

Closed system: The use of a solid or liquid 



hazardous material in a closed vessel or system 
that remains closed during normal operations 
where vapors emitted by the produa are not 
liberated outside of the vessel or system and the 
product is not exposed to the atmosphere during 
normal operations; and all uses of compressed 
gases. Examples of closed systems for solids and 
liquids include product conveyed through a piping 
system into a closed vessel, system or piece of 
equipment. 

Combustible dusts: Dusts and any similar solid 
material sufiBciently comminuted for suspension 
in still air which, when so suspended, is capable 
of self-sustained combustion. 

Combustible fibers: Includes readily ignitable and 
free-burning fibers such as cotton, sisal, 
henequen, jute, hemp, tow, cocoa fiber, oakum, 
baled waste, baled wastepaper, kapok, hay, straw, 
excelsior, Spanish moss and other like material. 

Combustible liquids: Any liquids having ^ flash 
point at or above 100°F (38°C) shall be known as 
Class n or m liquids. Combustible liquids shall 
be divided into the following classifications: 

Class U: Liquids having flash points at or above 
100°F (SS'C) and below 140°F (60°C). 

Class mA: Liquids hasmg flash points at or above 
140°F (60°C) and below 200°F (93 °C). 

Class llIB: Liquids ha.vmg flash points at or above 
200°F(93°C). 

Compressed gas: A gas or mixture of gases as 
contained having an absolute pressure exceeding 
40 psi at 70 °F (276 kPa at 2rC) or, regardless of 
the pressure at 70°F (21 °C), having an absolute 
pressure exceeding 140 psi at 130°F (965 kPa at 
54 °C); or any liquid material having a vapor 
pressure exceeding 40 psi absolute at 100°F (276 
kPa at 38°C) as determined by ASTM D323 listed 
in Appendix A 

Control area: Spaces within a building which are 
enclosed and bounded by exterior walls, flre 
walls, flre separation assemblies and roofs, or a 
combination thereof, where quantities of 
hazardous materials not exceeding the exempt 
amounts are stored, dispensed, used or handled. 

^frosive:^^ A chemical that causes visible 
destruction ofpOr irreversible alterations in, living 
tissue at the point of contact. Alchemical shall be 
considered a corrosive if, wheri~tested on the 
intact skin of albino rabbits by the test method 
described by DOTn 49 CFR; Part 173 listed in 
Appendix A, such chemical destroys or changes 
irreversibly the structure of the tissue at the point 



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USE OR OCCUPANCY 



of contact following an exposure period of four 
hours. This term shall not refer to action on 
inanimate surface. 

Cryogenic liquids (flammable or oxidizing); Any 

liquid that has a boiling point below -200 °F 
(-129°C). 

Deflagration: An exothermic reaction, such as the 
extremely rapid oxidation of z. flammable dust or 
vapor in air, in which the reaction progresses 
through the unbumed material at a rate less than 
the velocity of sound. A deflagration can have an 
explosive effect. 

Detached storage building: A separate single-story 
building, without a basement or crawl space, used 
for the storage oi hazardous materials and located 
an approved distance from all structures. 

Detonation: An exothermic reaction characterized 
by the presence of a shock wave in the material 
which establishes and maintains the reaction. The 
reaction zone progresses through the material at a 
rate greater than the velocity of sound. The 
principal heating mechanism is one of shock 
compression, detonations have an explosive 
effect. 

Dispensing: The pouring or transferring of any 
material from a container, tank or similar vessel, 
whereby vapors, dusts, fumes, mists or gases are 
liberated to the atmosphere. 

Explosive: Any chemical compound, mixture or 
device, the primary or common purpose of which 
is to function by explosion. The term includes, but 
is not limited to, dynamite, black powder, pellet 
powder, initiating explosives, detonators, safety 
fuses, squibs, detonating cord, igniter cord and 
igniters. 

The term "explosive" includes any material 
determined to be within the scope of USC Title 
18; Chapter 40 listed in Appendix A and also 
includes any material classified as an explosive by 
the Hazardous Material Regulations of DOTn 49 
CFR listed in Appendix A. 

Flammable: Capable of being readily ignited from 
common sources of heat or at a temperature of 
600°F(316°C)orless. 

Flammable compressed-gas: Either a mixture of 
13% or less (by volume) with air forms a 
flammable mixture, or ihe flammable range with 
air is wider than 12%, regardless of the lower 
limitation. These limitations shall be determined 
at atmospheric temperature and pressure. 

Flammable liquids: Any liquid that has a flash point 
below 100°F (38°C), and has a vapor pressure not 



exceeding 40 psia (276 kPa) at 100°F (38°C). 

Flammable liquids shall be known as Class I 

liquids and shall be divided into the following 

classifications; 

Class lA; Liquids having a flashpoint below 73 °F 

(23 °C) and having a boiling point below 100°F 

(38°C). 

Class IB: Liquids having a flash point below 

73 °F (23 °C) and having a boiling point at or 

above lOO^F. (38°C). 

Class IC; Liquids having a flash point at or above 

73°F (23°C) and below 100°F (38 °C). 

Flammable solid; A solid, other than a blasting 
agent or explosive, that is capable of causing fire 
through friction, absorption of moisture, 
spontaneous chemical change, or retained heat 
from manufacturing or processing, or which has 
an ignition temperature below 212°F ( 100°C) or 
which bums so vigorously and persistently when 
ignited as to create a serious hazard. A chemical 
shall be considered a flammable solid as 
determined in accordance with the test method of 
CPSC 16 CFR; Part 1500.44 listed in 
Appendix A, if it ignites and bums with a self- 
sustained flame at a rate greater than 0. 1 inch (3 
mm) per second along its major axis. 

Flash point; The minimum temperature in degrees 
Fahrenheit at which a. flammable liquid will give 
off sufficient vapors to form an ignitable mixture 
with air near the surface or in the container, but 
will not sustain combustion. The flashpoint of a 
liquid shall be determined by appropriate test 
procedure and apparatus as specified in ASTM 
D56 and ASTM D93 listed in Appendix A. 

Hazardous materials: Those chemicals or 
substances which are physical hazards or health 
hazards as defined and classified in 780 CMR 3 
and the Sre prevention code listed in Appendix A, 
whether the materials are in usable or waste 
condition. 

Health hazard; A classification of a chemical for 
which there is statistically significant evidence 
that acute or chronic health effects are capable of 
occurring in exposed persons. The term "health 
hazard" includes chemicals which are 
carcinogens, toxic or highly toxic agents, 
reproductive toxins, irritants, corrosives, 
sensitizers, hepatotoxins, nephrotoxins, 
neurotoxins, agents which are capable of acting 
on the hematopoietic system, and agents which 
damage the lungs, skin, eyes or mucous 
membranes. 

Highly toxic; A chemical falling within any of the 
following categories is considered highly toxic. 
1. A chemical that has a median lethal dose 
(LD50) of 50 milligrams or less per kilogram of 



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51 



780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



body weight when administered orally to 
albino rats weighing between 200 and 300 
grams each. 

2. A chemical that has a median lethal dose 
(LD50) of 200 milligrams or less per kilogram 
of body weight when administered by 
continuous contact for 24 hours (or less if 
death occurs within 24 hours) with the bare 
skin of albino rabbits weighing between two 
and three kilograms each. 

3. A chemical that has a median lethal 
concentration (LC50) in air of 200 parts per 
million by volume or less of gas or vapor, or 
two milligrams per liter or less of mist, fume or 
dust, when administered by continuous 
inhalation for one hour (or less if death occurs 
within one hour) to albino rats weighing 
between 200 and 300 grams each. 

Incompatible materials: Materials which, when 
mixed, have the potential to react in a marmer that 
generates heat, fumes, gases or by-products which 
are hazardous to life or property. 

Irritant: A chemical, which is not corrosive, but 
which causes a reversible inflammatory effect on 
living tissue by chemical action at the point of 
contact. A chemical shall be considered an irritant 
if, when tested on the intact skin of albino rabbits 
by the test method of CPSC 16 CFR; Part 1500.41 
listed in Appendix A for four hours exposure, it 
results in an empirical score of five or more. A 
chemical is an eye irritant if so determined by the 
procedure in CPSC 16 CFR; Part 1500.42 listed in 
Appendix A. 

Open system; The use of a solid or liquid hazardous 
material in a vessel or system that is continuously 
open to the atmosphere during normal operations 
and where vapors are liberated, or the product is 
exposed to the atmosphere during normal 
operations. Examples of open systems for solids 
and liquids include dispensing from or into open 
beakers or containers, dip tank and plating tank 
operations. 

Organic peroxide: An organic compound that 
contains the bivalent double-bonded oxygen 
structure and which is considered to be a 
structural derivative of hydrogen peroxide where 
one or both of the hydrogen atoms have been 
replaced by an organic radical. 

Unclassified detoaable: Organic peroxides which 
are capable of detonation. These peroxides 
present an extremely high explosion hazard 
through rapid explosive decomposition. 
Class I: Class I organic peroxides are capable of 
deflagration, but not detonation. These peroxides 
present a high explosion hazard through rapid 
decomposition. 



Class II: Class II organic peroxides bum very 
rapidly and present a severe reactivity hazard. 
Class HI: Class HI organic peroxides bum rapidly 
and present a moderate reactivity hazard. 

Oxidizer: A chemical other than a blasting agent or 
explosive that initiates or promotes combustion in 
other materials, thereby causing fire either of 
itself or through the release of oxygen or other 
gases. 

Class 4: An oxidizer that can undergo an 
explosive reaction due to contamination or 
exposure to thermal or physical shock. 
Additionally, the oxidizer will enhance the 
burning rate and is capable of causing 
spontaneous ignition of combustibles. 
Class 3: An oxidizer that will cause a severe 
increase in the burning rate of combustible 
materials with which the oxidizer comes in 
contact or that will undergo vigorous self- 
sustained decomposition due to contamination or 
exposure to heat. 

Class 2: An oxidizer that will cause a moderate 
increase in the burning rate or that is capable of 
causing spontaneous ignition of combustible 
materials with which the oxidizer comes in 
contact. 

Class 1: An oxidizer whose primary hazard is a 
slight increase in the burning rate but which does 
not cause spontaneous ignition when the oxidizer 
comes in contact with combustible material. 

Physical hazard: A chemical for which there is 
evidence in the referenced standards listed in 
Appendix A that it is a combustible liquid, 
compressed gas, cryogenic, explosive, flammable 
gas, flammable liquid, flammable solid, organic 
peroxide, oxidizer, pyrophoric or unstable 
(reactive) or water-reactive material. 

Pyrophoric: A material that will spontaneously 
ignite in air at or below a temperature of 130°F 
(54°C). 

Radioactive material: Any material or combination 
of material that spontaneously emits ionizing 
radiation. 

Sensitizer: A chemical that causes a substantial 
proportion of exposed people or animals to 
develop an allergic reaction in normal tissue after 
repeated exposure to the chemical. 

Tires, bulk storage of: Storage of 10,000 or more 
average-sized passenger vehicle tires weighing 
approximately 25 pounds (11 kg) each (see 
780 CMR 307.5). 

Toxic: A chemical that is within any of the following 
categories shall be considered toxic: 
I A chemical that has a median lethal dose 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USE OR OCCUPANCY 



(LD50) of more than 50 milligrams per 
kilogram but not more than 500 milligrams per 
kilogram of body weight when administered 
orally to albino rats weighing between 200 and 
300 grams each. 

2. A chemical that has a median lethal dose 
(LD50) of more than 200 milligrams per 
kilogram but not more than 1,000 milligrams 
per kilogram of body weight when 
administered by continuous contact for 24 
hours (or less if death occurs within 24 hours) 
with the bare skin of albino rabbits weighing 
between two and three kilograms each. 

3. A chemical that has a median lethal 
concentration (LC50) in air of more than 200 
parts per million but not more than 2,000 parts 
per million by volume of gas or vapor, or more 
than two milligrams per liter but not more than 
20 milligrams per liter of mist, fume or dust, 
when administered by continuous inhalation 
for one hour (or less if death occurs within I 
hour) to albino rats weighing between 200 and 
300 grams each. 

Unstable (reactive) material: A material which, in 
the pure state or as commercially produced, will 
vigorously polymerize, decompose or condense, 
become self-reactive, or otherwise undergo a 
violent chemical change under conditions of 
shock, pressure or temperature. 
Class 4: Materials that in themselves are readily 
capable oi detonation or explosive decomposition 
or explosive reaction at normal temperatures and 
pressures. This class includes, among others, 
materials that are sensitive to localized thermal or 
mechanical shock at normal temperatures and 
pressures. 

Class 3: Materials that in themselves are capable 
of detonation or explosive decomposition or 
explosive reaction, but that require a strong 
initiating source or that must be heated under 
confinement before initiation. This class includes, 
among others, materials that are sensitive to 
thermal or mechanical shock at elevated 
temperatures and pressures. 
Class 2: Materials that readily undergo violent 
chemical change at elevated temperatures and 
pressures. This class includes, among others, 
materials that exhibit an exotherm at temperatures 
less than or equal to 150°C when tested by 
differential scanning calorimetry. 
Qass 1: Materials that in themselves are normally 
stable, but that can become unstable at elevated 
temperatures and pressures. This class includes, 
among others, materials that change or decompose 
on exposure to air, light or moisture, and materials 
that exhibit an exotherm at temperatures greater 
than I5G°C, but less than or equal to 300''C, 
when tested by differential scanning calorimetry. 

Water-reactive materials: A chemical that reacts 



with water to release a gas that is either 
flammable or presents a health hazard. 
Class 3: Materials which react explosively with 
water without requiring heat or confinement. 
Class 2: Materials which are capable of forming 
potentially explosive mixtures with water. 

307.3 Use Group H-1 structures: All buildings and 
structures which contain materials that present a 
detonation hazard, shall be classified as Use Group 
H- 1. Such materials shall include but are not limited 
to: 

Explosives 

Organic Peroxides, unclassified detonabie 

Oxidizers. Class 4 

Unstable (reactive) materials. Class 3 detonabie, 

and Class 4 

Detonabie pyrophoric materials 

307.4 Use Group H-2 structures: All buildings and 
structures which contain materials that present a 
deflagration hazard or a hazard from accelerated 
-burning, shall be classified as Use Group H-2. Such 
materials shall include but are not limited to: 

Combustible dusts 

Combustible liquids, Class n and Class IIIA 

Cryogenic liquids, flammable or oxidizing 

Flammable gases 

Flammable liquids 

Organic peroxides. Class I and Class II 

Oxidizers, Class 3 

Oxidizing gases 

Pyrophoric liquids, solids and gases, 

nondetonable 

Unstable (reactive) materials. Class 3, 

nondetonable 

307.5 Use Group H-3 structures: All buildings and 
structures which contain materials that readily 
support combustion or present a physical hazard, 
shall be classified as Use Group H-3. Such materials 
shall include but are not limited to: 

Aerosols, except that Level 1 aerosols defined in 

the fire prevention code listed in Appendix A shall 

be classified as Use Group S- 1 or F- 1 

Combustible fibers 

Combustible liquids. Class IIIB 

Flammable solids 

Organic peroxides. Class III 

Oxidizers, Class 1 and Class 2 

Tires, bulk storage of 

Unstable (reactive) materials. Class 1 and Class 2 

Water-reactive materials. Class 2 and Class 3 

307.6 Use Group H-4 structures: All buildings and 
structures which contain materials that are health 
hazards, shall be classified as Use Group H-4. Such 
materials shall include but are not limited to: 

Corrosives 

Highly toxic materials 

Irritants 



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53 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



Radioactive materials 

Sensitizers 

Toxic materials 

301.1 Multiple hazards: All buildings and 
structures containing a material or materials 
representing hazards that are classified in one or 
more of Use Groups H-1, H-2, H-3 and H-4, shall 
conform to the code requirements for each of the use 
groups so classified. 

307.8 Exceptions: The following shall not be 
classified in Use Group H, but shall be classified in 
the use group which they most nearly resemble. 
High-hazard materials of any quantity shall conform 
to the requirements of 780 CMR, including 
780 CMR 417.0, and the fire prevention code listed 
m Appendix A. 

1. All buildings and structures which contain 
not more than the exempt quantities of high- 
hazard materials as shown in Tables 307 .8(1) 
and 307.8(2) provided that such buildings are 
maintained in accordance with the fire 
prevention code listed \n Appendix A. 

2. Buildings utilizing control areas in 
accordance with 780 CMR 417.2 which 
contain not more than the exempt quantities 
of high-hazard materials as shown in Tables 
307.8(1) and 307.8(2). 

3. Buildings and structures occupied for the 
storage of 10,000 or more vehicle tires 
weighing approximately 25 pounds (11 kg) 
each, provided that such buildings are 
equipped throughout with an automatic 
sprinkler system in accordance with 
780 CMR 906.2.1. 

4. Buildings and structures occupied for the 
application of flammable finishes, provided 
that such buildings or areas conform to the 
requirements of 780 CMR 419.0 and NFiPA 
33, NFlPA 34 and the fire prevention code 
listed in Appendix A. 

5. Rooms containing flammable liquids in 
tightly closed containers of 1 -gallon capacity 
(0.0038 m) or less for retail sale or private 
utilization on the premises and in quantities 
not exceeding two gallons per square foot 
(0.082 tk'Itc^ ) of room area. 

6. Retail paint salesrooms with quantities of 
paint not exceeding two-gallons per square 
foot (0.082 m''/m^ of room area. 

7. Closed systems housing flammable or 
combustible liquids or gases utilized for the 
operation of machinery or equipment. 

8. Cleaning establishments which utilize 
combustible liquid solvents having a flash 
point of 140°F (60 °C) or higher in closed 
systems employing equipment listed by an 
approved testing agency, provided that this 
occupancy is separated fi"om all other areas of 
the building by one-hour fireresistance rated 



fire separation assemblies. 
9 Cleaning establishments which utilize a 
liquid solvent having di flash point at or above 
200°F(93°C). 

10. Liquor stores and distributors without bulk 
storage. 

1 1 . Refingeration systems. 

12. The storage or utilization of materials for 
agricultural purposes on the premises. 

13. Stationary batteries utilized for facility 
emergency power, uninterrupted power 
supply or telecommunication facilities 
provided that the batteries are provided with 
safety venting caps and ventilation is 
provided in accordance with the mechanical 
code listed in Appendix A. 

14. Corrosives, irritants and sensitizers shall not 
include personal or household products in 
their original packaging used in retail display 
or commonly used building materials. 

15 Buildings and structures occupied for aerosol 
manufacturing or storage shall be classified 
as Use Group F-1 or S-1, provided that such 
buildings conform to the requirements of 
NFiPA 30 and the fire prevention code listed 
in Appendix A. 

780 CMR 308.0 INSnTUTIONAL USE 
GROUPS 

308.1 General: All structures in which people 
suffering fi-om physical limitations because of health 
or age are harbored for medical or other care or 
treatment, or in which people are detained for penal 
or coaection purposes, or in which the liberty of the 
inmates is restricted, shall be classified as Use 
Group I-l, 1-2 or 1-3. The term "Use Group I" shall 
include Use Groups I-l, 1-2 and 1-3. 

308.2 Use Group I-l: Except as modified by the 
provisions of 780 CMR 4, Special Use and 
Occupancy, this use group shall include buildings 
and structures which house six or more individuals 
who, because of age, mental disability or other 
reasons, must live in a supervised environment but 
who are physically capable of responding to an 
emergency situation without personal assistance. 
Except as specified otherwise by the requirements 
of 780 CMR 4, Special Use and Occupancy, where 
accommodating persons of the above description, 
the following types of facilities shall be classified as 
I-l facilities, board and care facilities, half-way 
houses, group homes, social rehabilitation facilities, 
alcohol and drug centers and convalescent facilities. 
A facility such as the above with five or less 
occupants shall be classified as a residential use 
group. 

308.3 Use Group 1-2: This use group shall include 
buildings and structures used for medical, surgical, 
psychiatric, nursing or custodial care on a 24-hour 
basis of six or more persons who are not capable of 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USE OR OCCUPANCY 



self-preservation. Where accommodating persons of 
the above description, the following types of 
facilities shall be classified as 1-2 facilities: 
hospitals, nursing homes (both intermediate care 
facilities and skilled nursing facilities), mental 
hospitals and detoxification facilities. A facility such 
as the above with five or less occupants shall be 
classified as a residential use group. 

308.3.1 Child care facility: A child day care 
center which accommodates children two years 
nine months of age or less shall be classified as 
Use Group 1-2. 

308.4 Use Group 1-3: This use group shall include 
buildings and structures which are inhabited by six 
or more persons who are under some restraint or 
security. An 1-3 facility is occupied by persons who 
are generally incapable of self-preservation due to 
security measures not under the occupants' control. 
Where accommodating persons of the above 
description, the following types of facilities shall be 
classified as 1-3 facilities: prisons, jails, 
reformatories, detention centers, correctional centers 
and prerelease centers. Buildings of Use Group 1-3 
shall be classified as one of the occupancy 
conditions indicated in 780 CMR 308.4.1 through 



308.4.5 (see 780 CMR 410.0). 

308.4.1 Occupancy Condition I: This occupancy 
condition shall include all buildings in which free 
movement is allowed fi^om sleeping areas, and 
other spaces where access or occupancy is 
permitted, to the exterior via means of egress 
without restraint. An Occupancy Condition I 
facility shall be classified as Use Group R. 

308.4.2 Occupancy Condition II: This 
occupancy condition shall include all buildings in 
which fi"ee movement is allowed fi^om sleeping 
areas and any other occupied smoke compartment 
to one or more other smoke compartments. Egress 
10 the exterior is impeded by locked exits. 

308.4.3 Occupancy Condition ID: This 
occupancy condition shall include all buildings in 
which fi-ee movement is allowed within individual 
smoke compartments, such as within a residential 
unit comprised of individual sleeping rooms and 
group activity spaces, where egress is impeded by 
remote-controlled release of means of egress from 
such smoke compartment to another smoke 
compartment 



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55 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

Table 307.8(1) 
EXEMPT AMOUNTS OF HAZARDOUS MATERIALS, LIQUIDS 





AND CHEMICALS PRESENTING A PHYSICAL HAZARD 
MAXIMUM OUANTITIES PER CONTROL AREA^*^ 








Class 


Use 
Groups 


Storage 


Closed systems 


Open systems 


Matenal 


solid 
pounds 
(cubic 

feet) 


liquid 
gallons 
(pounds) 


gas 
(Cubic 
feet) 


Solid 
pounds 
(cubic 
feet) 


Liquid 
gallons 
(pounds) 


Gas cubic 
feet 


Solid 
pounds 
(cubic 

feet) 


liquid 
gallons 
(pounds) 


Combustible 
liquid 


U 

niA 
niB 


H-2 
H-2 
H-3 


NA 


120^'^ 
330''-% 
13,200 


NA 


NA 


330% 
13,200 


NA 


NA 


80% 
3,300 


Conbustible 
dust pounds 
per 1,00 feet 




H-2 


1^ 


NA 


NA 


1« 


NA 


NA 


1^ 


NA 


Combustible 
fiber 


loose 
Baled 


H-3 


(100) 
(1,000) 


NA 


NA 


(100) 
(1,000) 


NA 


NA 


(20) 
(200) 


NA 


Cryogenics, 
flammible or 
oxidizing 




H-2 


NA 


45'^ 


NA 


NA 


45"^ 


NA 


NA 


10'^ 


Explosives 




H-1 


,ei,. 


(,^ej,.i 


NA 


%^ 


(■/4)' 


NA 


%'' 


iV^)' 


Flammable 
gas 


Gaseous 
Liquified 


H-2 


NA 


NA 
30^^ 


i.ooo'^'^ 

NA 


NA 


NA 
30^^ 


TSO"'^ 
NA 


NA 


NA 


Flammible 
liquid 


lA 
IB 
IC 


H-2 


NA 


30^'' 
60^-' 
90"'^ 


NA 


NA 


60^ 
90" 


NA 


NA 


-a 
11^ 


Combination 
(lA, IB, IC) 




H-2 


NA 


120'*-^J 


NA 


NA 


120"'^ 


NA 


NA 


30"'^ 


Flammible 
solid 




H-2 


125"'^ 


NA 


NA 


25^ 


NA 


NA 


25'' 


NA 


Organic 
peroxide 


UD 

1 

n 
m 


H-1 
H-2 
H-3 
H-3 


if 
50? 

lis"'' 


< 


NA 




^4 
(')d 

(125)'' 


NA 




(25)" 


Oxidizer 


4 
3 
2 
1 


H-1 

H-2 
H-3 
H-3 


250? 
1,000 ■* 


< 

(»<e 

(250)Te 
(1,000)^ 


NA 


i. 

250'' 
1.000 


(250)" 
(1,000) 


NA 


t 

50. 
200-^ 


(50), 
(200) 


Oxidizer - 
gas 


Gaseous 
Liquified 


H-2 


NA 


,^fc 


NA 


NA 


NA 
(15)^-^ 


1,500"-^ 

NA 


NA 


NA 


Pyrophoric 




H-2 


4^^ 


(4)"* 


50^* 


l'^ 


(l)"^ 


10^* 








Unstable 
(reactive) 


4 

3 

2 
1 


H-I 
H-1 or 
H-2 
H-3 
H-3 


50? 




lo'-" 

50^'^ 

250'-' 
750'*'^ 




e4 
(1)' 

(50)"^^ 
(125) 


2? 

lo"-^ 

250^'^ 
750'^-^ 




(10)" 
(25)' 


Water 
reactive 


3 
2 


H-3 
H-3 


5? 


s 


NA 


i^ 


(50)-^ 


NA 


,■; 


(10)" 



Note a. For use of control areas, see 780 CMR 417,2 

Note b. The aggregate quantity in utilization and storage shall not exceed the quantity Usted for storage. 

Note c. The quantities of alcoholic beverages in retail sales occupancies shall not be limited provided the liquids 
are packaged in individual containers not exceeding 1 gallon. In retail sales and storage occupancies, the quantities 
of medicines, foodstuffs and cosmetics, containing not more than 50% by volume of water-miscible liquids and with 
the remainder of the solutions not being flammable, shall not be lunited provided that such materials are packaged in 
individual containers not exceeding one gallon. 

Note d. Maximum quantities shall be increased 100% in buildings equipped throughout -with an automatic sprinkler 
system in accordance with 780 CMR 906.2. 1. Where note e. Also applies, the increase for both notes shall be applied 
accumulatively. 

Note e. Quantities shall be increased 100% when stored in approved cabinets, gas cabinets, fiime hoods, exhausted 
enclosures, or safety cans as specified in the fire prevention code listed in Appendix A. Where note d. also applies, the 
increase for both notes shall be apphed accumulatively. 



56 



780 CMR - Sixth Edition corrected - 9/19/97 (Effective 2/28/97) 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USE OR OCCUPANCY 

Note f. The permitted quantities shall not be limited in a building equipped throughout widi an automatic sprinkler 
system in accordance with 780 CMR 906.2. 1 . 

Note g. A dust explosion potential is considered to exist where 1 pound or more of combustible dust per 1,000 cubic 
feet of volume is normally in suspension or could be put into suspension in all or a portion of an enclosure or mside 
pieces of equipment This also includes combustible dust which accumulates on horizontal surface inside buildings 
or equipment and which could be put into suspension be an accident, sudden force or sudden explosion. 

Note h. Permitted only in buildings equipped throughout with an automatic sprinkler system in accordance with 
780 CMR 906.2.1. 

Note i. One pound of black sporting powder and 20 pounds of smokeless powder are permitted in sprinklered or 
unsprinklered buildings. 

Note j. Containing not more than the exempt amounts of Class I-A, Class I-B or Class I-C flammable liquids. 

Note k. Quantities in parenthesis indicate quantity units in parenthesis at the head of each column. 1 cubic foot = 
0.028 m^ 1 pound = 0.454 kg; 1 gaUon = 0.00379 m^ 

Table 307.8(2) 

EXEMPT AMOUNTS OF HAZARDOUS MATERIALS, LIQUIDS AND CHEMICALS 

PRESENTING A HEALTH HAZARD 

MAXIMUM QUANTTTIES PER CONTROL AREA'''''^ 





Storage 


Closed systems 


Open systems 


Material 


Solid^ 
pounds 


Liquid 
gallons^ ^ 
(pounds) ' 


Gas cubic 
feet 


Solid J 
pounds 


Liquid 

gallons 

(pounds) 


Gas cubic 
feet 


Solid J 
pounds 


Liquid 

gallons 

(pounds) 


Corrosive 


5.000 


500 


m'^'' 


5.000 


500 


810''-= 


1.000 


100 


Highly toxic 


1 


(1) 


20^ 


1 


(1) 


20^ 


'A 


(%) 


Irritant 


5,000 


500 


810'^'= 


5,000 


500 


810''-= 


1.000 


100 


Radioactive* 


25 rem - unsealed source 
1 00 rem - sealed source 


100 rem - sealed source 


25 rem - sealed source 


Sensitizer 


5.000 


500 


810'''= 


5,000 


500 


sio"*-' 


1,000 


100 


Toxic 


500 


(500) 


810'''= 


500 


(500) 


810"-^ 


125 


(125) 


Other health 
hazards 


5.000 


500 


810'''' 


5,000 


500 


sio''-^ 


1,000 


100 



Note a. For use of control areas, see 780 CMR 417.2 

Note b. In retail sales occupancies, the quantities of medicines, foodstuffs and cosmetics, containing not more than 
50% by voltmie of water-miscible Uquids and with the remainder of the solutions not being flammable, shall not be 
limited provided that such materials are packaged in individual containers not exceeding 1 gallon. 

Note c. The aggregate quantity in utilization and storage shall not exceed the quantity listed for storage. 

Note d. Maximimi quantities shall be increased 100% in buildings equipped throu^out with an automatic sprinkler 
system in accordance widi 780 CMR 906.2.1. Where note e. also applies, die increase for both notes shall be applied 
acciunulatively. 

Note e. Maximum quantities shall be increased 100% when stored in approved storage cabinets, gas cabinets, fume 
hoods, exhausted enclosures, or safety cans as specified in the fire prevention code listed in Appendix A. Where note 
d. also applies, the increase for both notes shall be apphes accumulatively. 

Note f. Permitted only when stored in approved exhausted gas cabinets, exhausted enclosures or fume hoods. 

Note g. Maximum dosage permitted in any single exposure. 

Note h. Quantities in parenthesis indicate quantity units in parenthesis at the head of each column. 1 cubic foot = 
0.028 m^ 1 pound = 0.454 kg; 1 gaUon = 0.00379 m^ 



308.4.4 Occupancy Condition IV: This 
occupancy condition shall include all buildings in 
which free movement is restricted from an 
occupied space. Remote-controlled release is 
provided to permit movement from all sleeping 
rooms, activity spaces and other occupied areas 
within the smoke compartment to other smoke 
compartments. 

308.4.5 Occupancy Condition V: This 
occupancy condition shall include all buildings in 
which free movement is restricted from an 
occupied space. StaflF-controlled release is 
provided to permit movement from all sleeping 
rooms, activity spaces and other occupied areas 



within the smoke compartment to other smoke 
compartments. 

780 CMR 309.0 MERCAIVTELE USE 
GROUP 
309.1 General: All buildings and structures which 
are occupied for display and sales purposes 
involving stocks of goods, wares or merchandise 
incidental to such purposes and open to the public, 
shall be classified as Use Group M. This includes, 
among others, retail stores, automotive service 
stations, shops, salesrooms and markets. An 
automotive service station is that portion of a 
property where motor fliels are stored and dispensed 



9/19/97 (EflFective 2/28/97) - corrected 780 CMR - Sixth Edition 



57 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



from fixed equipment into the fuel tanks of motor 
vehicles or approved containers, including any 
building used for the sale of automotive accessories, 
or for minor automotive repair work. Minor repairs 
include the exchange of parts, oil changes, engine 
tune-ups and similar routine maintenance work. 
Retail sales of hazardous materials shall comply 
with 780 CMR 307.8 or 780 CMR 426, as 
applicable. 

780 CMR 310.0 RESIDENTIAL USE 
GROUPS 

310.1 General: All structures in which individuals 
live, or in which sleeping accommodations are 
provided (with or without dining facilities), 
excluding those that are classified as institutional 
occupancies, shall be classified as Use Group R-1, 
R-2, R-3, R-4 or R-5. The term "Use Group R" shall 
include Use Groups R-1, R-2 and R-3, R-4 and R-5. 

Note: Assisted Living Residences which are 
certified as such by the Executive Office of Elder 
Affairs pursuant to M.G.L. c. 19D shall be 
classified in the residential use group R-1, R-2, 
R-3 or R-4 as applicable. Portions of an assisted 
Living Residence which are used for any use 
other than residential shall be classified in 
accordance with the intended use. 

310.2 Definitions: The following words and terms 
shall, for the purposes of 780 CMR 3 and as used 
elsewhere in 780 CMR, have the meanings shown 
herein. 

Dwellings: 
Assisted Living Residence: A residence licensed 
by the Executive Office of Elder Affairs pursuant 
to M.G.L. c. 19D. 

Boarding house: A building arranged or used for 
lodging for compensation, with or without meals, 
and not occupied as a single unit. 
Dormitory: A space in a building where group 
sleeping accommodations are provided in one 
room, or in a series of closely associated rooms. 
Dwelling unit: A single unit providing complete, 
independent living facilities for one or more 
persons, including permanent provisions for 
living, sleeping, eating, cooking and sanitation. 
Hotel: Any building containing six or more guest 
rooms, intended or designed to be used, or which 
are used, rented or hired out to be occupied or 
which are occupied for sleeping purposes by 
guests. 

Lodging house: Refer to M.G.L. c. 140, § 22 
Motel: A hotel as defined in 780 CMR. 
Multiple dwelling: A building or portion thereof 
containing more than two dwelling units and not 
meeting the requirements for a multiple single 
dwelling. 

Multiple suigle dwelling: A building or portion 
thereof containing more than two dwelling units 
(see 780 CMR 310.5) 
One-family dwelling: A building containing one 



dwelling unit but not a lodging house (see M.G.L. 
c. 140, § 22). 

Two-family dwelling: A building containing two 
dwelling units but not lodging house (see M.G.L. 
c. 140, § 22). 

310.3 Use Group R-1 structures: This use group 
shall include all hotels, motels, boarding houses and 
similar buildings arranged for shelter and sleeping 
accommodations and in which the occupants are 
primarily transient in nature, occupying the facilities 
for a period of less than 30 days. 

310.4 Use Group R-2 structures: This use group 
shall include all multiple dwellings having more than 
two dwelling units, except as provided for in 
780 CMR 310.5 for multiple single dwelling units, 
and shall also include all boarding houses and 
similar buildings arranged for shelter and sleeping 
accommodations in which the occupants are 
primarily not transient in nature. 

310.4.1 Dormitories: A dormitory facility which 
accommodates more than five persons more than 
2'/2 years of age shall be classified as Use Group 
R-2. 

310.5 Use Group R-3 structures: This use group 
shall include all buildings arranged for occupancy as 
one- or two-family dwellings, including multiple 
single family dwellings where each unit has two 
independent means of egress not common to any 
other dwelling unit, and where each dwelling unit is 
separated from adjoining dwelling units by two-hour 
fire separation assemblies (see 780 CMR 709.0). 
Use group R-3 structures are not lodging houses (see 
M.G.L. c. 140, § 22). 

Exceptions 

l.In multiple single-family dwellings that are 
equipped throughout with an approved 
automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1 or 906.2.2, 
the fireresistance rating of the dwelling unit 
separation shall not be less than one hour. 
Dwelling unit separation walls shall be 
constructed as fire partitions (see 780 CMR 
711.0). 

2. In multiple single-family dwellings that are 
equipped throughout with an approved 
automatic sprinkler system installed in 
accordance with 780 CMR 906.2.3, a two-hour 
fire separation assembly shall be provided 
between each pair of dwelling units. The 
fireresistance rating between each dwelling unit 
shall not be less than one hour and shall be 
constructed as a. fire partition. 

31(i.5.1Family day-care home: A family day- 
care home as defined by M.G.L. C.28A, §. 9, shall 
be classified as use group R-3 or R-4. Such 
facility shall not accommodate more than six 
children. 



58 



780 CMR - Sixth Edition 



1/19/01 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USE OR OCCUPANCY 



310.6 Use Group R-4 structures: This use group 
shall include all detached one- or two-family 
dwellings not more than three stories in height, and 
the accessory structures. . AH such structures shall 
be designed in accordance with 780 CMR 36 or in 
accordance with the requirements of 780 CMR 
applicable to Use Group R-3 . 

310. 7 Use Group R-5 structures: This use group 
shall include all buildings arranged for use as 
limited group residences in accordance with the 
requirements of 780 CMR (see 780 CMR 4). 

780 CMR 311.0 STORAGE USE GROUPS 

311.1 General: All structures which are primarily 
used for the storage of goods, wares or merchandise 
shall be classified as Use Group S-1 or S-2. This 
includes, among others, warehouses, storehouses and 
fi-eight depots- The quantity oi hazardous materials 
in storage shall comply with 780 CMR 307.8. The 
term "Use Group S" shall include Use Groups S-1 
and S-2. 

311.2 Moderate-hazard storage. Use Group S-1: 
Buildings occupied for the storage of moderate- 
hazard contents which are likely to bum with 
moderate rapidity, but which do not produce either 
poisonous gases, fumes or explosives including, 
among others, the materials listed in Table 311.2, 
shall be classified as Use Group S-1. A motor 
vehicle repair garage is that portion of a property 
wherein major repairs, such as engine overhauls, 
painting or body work, are performed on motorized 
vehicles. 

Table 311.2 

MODERATE-HAZARD STORAGE 

OCCUPANCIES 



Bags, cloth, burlap and paper 

Bamboo and rattan 

Baskets 

Belting, canvas and leather 

Books and papers in rolls and 

packs 
Boots and shoes 
Buttons, including cloth 

covered, pearl or bone 
Cardboard and cardboard 

boxes 
Clothing, woolen wearing 



Cordage 

Furniture 

Furs 

Glue, mucilage, paste and size 

Horn and combs, other than 

celluloid 
Leather, enameling or 

japanning 



Linoleum 

Livestock shelters 

Lumber yards 

Motor vehicle repair garages 

Petroleum warehouses for 

storage of lubricating oils 

with a flash point of 200°F 

or higher 
Photo engraving 
Pubhc garages (Group 1) and 

stables 
SUk 
Soap 
Sugar 
Tobacco, cigars, cigarettes 

and snuff 
Upholstering and mattress 
manufacturing 
Wax candles 



311.3 Low-hazard storage. Use Group S-2: Low- 
hazard storage occupancies shall include buildings 
occupied for the storage of noncombustible 
materials, and of low-hazard wares that do not 



ordinarily bum rapidly such as products on wood 
pallets or in paper cartons without significant 
amounts of combustible wrappings, but with a 
negligible amount of plastic trim such as knobs, 
handles or film wrapping. Such occupancies shall be 
classified as Use Group S-2 including, among 
others, the materials listed in Table 3 1 1 .3 

Table 311. 3 
LOW-HAZARD STORAGE OCCUPANCIES 



Asbestos 

Beer or wine up to 1 2% 

alcohol in metal, glass or 

ceramic contamers 
Cement in bags 
Chalk and crayons 
Dairy products in nonwaxed 

coated paper containers 
Dry cell batteries 
Electrical coils 
Electrical motors 
Food products 
Foods in noncombustible 

containers 
Fresh fruits and vegetables in 

nonplastic trays or 

containers 
Frozen foods 
Glass 
Glass bottles, empty or filled 

with noncombustible 

Uquids 



Gypsum board 

Inert pigments 

Ivory 

Meals 

Metal cabinets 

Metal desks with plastic tops 

and trim 
Metal parts 
Metals 
Mirrors 

New empty cans 
Oil filled and other types of 

distribution transformers 
Open parking structures 
Porcelain and pottery 
Public garages (Group 2) 
Stoves 

Talc and soapstone 
Washers and dryers 



780 CMR 312.0 UmJTY AND 
MISCELLANEOUS USE GROUP 

312.1 General: Buildings and structures of an 
accessory charaaer and misceUaneous stmctures not 
classified in any specific use group shall be 
constructed, equipped and maintained to conform to 
the requirements of 780 CMR commensurate with 
the fire and life hazard incidental to their occupancy. 
Use Group U shall include fences over six feet (1 829 
mm) high, tanks, cooling towers, retaining walls and 
buildings such as private garages, carports, sheds 
and agricultural buildings 

780 CMR 313.0 MIXED USE GROUPS 

313,1 Two or more use groups: Where a building 
is occupied by two or more occupancies not included 
in the same use group, the building or portion 
thereof shall comply with 780 CMR 313.1.1,313.12 
or 313.1.3 or with combinations of 780 CMR 

313.1.1, 313.1.2 and 313.1.3. except that 
occupancies in Use Group H shall be separated fi"om 
all other use groups in accordance with 780 CMR 
313.1.2 or 313.1.3. Buildings that include an open 
parking structure located beneath an A, I, B, M or R 
Use Group shall comply with 780 CMR 313.1,1, 

313.1.2, 313.1,3 or313,2. 

Exception: ^re areas of Use Group H-1 shall be 
in separate and detached buildings and structures 
in accordance with 780 CMR 707, 11, 

313.1.1 Nonseparated use groups: Each portion 
of the building shall be individually classified as 



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59 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



to use. The required type of construction for the 
building shall be determined by applying the 
height and area limitations for each of the 
applicable use groups to the entire building. The 
most restrictive type of construction, so 
determined, shall apply. The other requirements 
of 780 CMR shall apply to each portion of the 
building based on the use group of that occupancy 
except that the most restrictive applicable 
provisions of 780 CMR 403.0 and 780 CMR 9 
shall apply to these nonseparated use groups. A 
fire separation assembly is not required between 
use groups, except as required by other sections of 
780 CMR. 

313.1.2 Separated use groups: Each portion of 
the building shall be individually classified in a 
use group and shall be completely separated from 
adjacent Jire areas by fire separation assemblies 
(see 780 CMR 709.0) and floor/ceiling assemblies 
(see 780 CMR 713.0) having a fireresistance 
rating determined in accordance with Table 
313.1.2, for the use groups being separated. Each 
fire area shall comply with the code based on the 
use group of that space. Each fire area shall 
comply with the height limitations of 780 CMR 
503.0 based on the use of that space and the type 
of construction classification. In each story, the 
building area shall be such that the sum of the 
ratios of the floor area of each use group divided 
by the allowable area fi-om 780 CMR 503.0 for 
each use group shall not exceed one. 

Exception: Where the building is equipped 
throughout with an automatic sprinkler system 
in accordance with 780 CMR 906.2.1, the 
required fireresistance rating of fire separation 
assemblies separating areas of other than Use 
Group H, shall be reduced from those indicated 
in Table 3 1 3 . 1 .2 by one hour but to not less than 
one hour and to not less than that required by 
Table 602 for floor construction. 

313.1.3 Separate buildings: Each use group shall 
be considered a separate building where each such 
use group is completely separated from adjacent 
use groups by fire walls having a fireresistance 
rating corresponding to that required by Table 



602. Each building shall then comply with the 
provisions of 780 CMR applicable to the use 
group of that building. 

313.2 Open parking structures beneath other use 
groups: Open parking structures constructed under 
Use Groups A, I, B, M and R shall not exceed the 
height and area limitations permitted under 
780 CMR 406.0. The height and area of the portion 
of the building above the open parking structure 
shall not exceed the limitations in 780 CMR 503.0 
for the upper use group. The height, in both feet and 
stories, of the portion of the building above the open 
parking structure shall be measured from grade 
plane and shall include both the open parking 
structure and the portion of the building above the 
parking structure. 

Fire separation assemblies between the parking 
occupancy and the upper occupancy shall 
correspond to the required fireresistance rating 
prescribed in Table 313.1.2 for the uses involved. 
The type of construction shall apply to each 
occupancy individually, except that all structural 
members-including main bracing within the open 
parking structure which is necessary to support the 
upper occupancy-shall be protected with the more 
restrictive fire resistive assemblies of the 
occupancies involved as shown in Table 602 Exit 
facilities for the upper occupancy shall conform to 
780 CMR 10 and shall be separated from the parking 
area by fire separation walls having at least a two- 
hour fireresistance rating as required by Table 602 
and self-closing doors complying with 780 CMR 
716 means of egress from the open parking 
facility shall comply with 780 CMR 1010.5. 

313.3 Use Group R: In buildings of Type 2C, 3B or 
5B construction with an occupancy in Use Group R, 
the first floor shall not be occupied for Use Groups 
B and M, unless the floor/ceiling assembly and the 
enclosure walls are protected to afford a one-hour 
fireresistance rating and the exits from the residential 
floors are separately enclosed in accordance with the 
requirements of 780 CMR 10. 



60 



780 CMR - Sixth Edition 



2/7/97 (Effective 2/28/97) 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

USE OR OCCUPANCY 

Table 313.1.2 

FIRERESISTANCE RATING REQUIREMENTS FOR FERE SEPARATION 

ASSEMBLIES BETWEEN FIRE AREAS^ 

Use Group NP- Not Permitted 

NA - Not Applicable 





A-1 


: A-2 


A-3 


A-4 


A-5 


B 


E 


F-1 


F-2 


H-l 


H-2 


H-3 


H-4 


I-l 


1-2 


1-3 


M 


R-1 


R-2 


R-3 


S-1 


S-2 


U 




A-1 2 


3 


2 


2 


2 


2 


2 


2 


2 


NP 


4 


3 


2 


2 


3 


3 


2 


2 


2 


2 


2 


2 


NA 




A-2 


3 


3 


3 


3 


3 


3 


3 


3 


NP 


4 


3 


3 


3 


3 


3 


3 


3 


3 


3 


3 


3 


NA 




A-3 




2 


2 


2 


2 


2 


2 


2 


NP 


4 


3 


2 


2 


3 


3 


2 


2 


2 


2 


2 


2 


NA 




A-4 






2 


2 


2 


2 


2 


2 


NP 


4 


3 


2 


2 


3 


3 


2 


2 


2 


2 


2 


2 


NA 




A-5 








NA 


2 


2 


2 


2 


NP 


4 


3 


2 


2 


3 


3 


2 


2 


2 


2 


2 


2 


NA 




B 










2 


2 


2 


2 


NP 


4 


3 


2 


2 


3 


3 


2 


2 


2 


2 


2 


2 


NA 




E 












2 


2 


2 


NP 


4 


3 


2 


2 


3 


3 


2 


2 


2 


2 


2 


2 


NA 




F-1 














2 


2 


NP 


4 


3 


2 


2 


3 


3 


2 


2 


2 


2 


2 


2 


NA 




F-2 
















2 


NP 


4 


3 


2 


2 


3 


3 


2 


2 


2 


2 


2 


2 


NA 


u 


H-1 


















NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NA 


s 


H-2 




















4 


4 


4 


4 


4 


4 


4 


4 


4 


4 


4 


4 


NA 


E 


H-3 






















3 


3 


3 


3 


3 


3 


3 


3 


3 


3 


3 


NA 




H-4 
























2 


2 


2 


2 


2 


2 


2 


2 


2 


2 


NA 


G 


I-l 


























2 


3 


3 


2 


2 


2 


2 


2 


2 


NA 


R 


1-2 




























3 


3 


3 


3 


3 


3 


3 


3 


NA 





1-3 






























3 


3 


3 


3 


3 


3 


3 


NA 


U 


M 
































2 


2 


2 


2 


2 


2 


NA 


P 


R-1 


































2 


2 


2 


2 


2 


NA 




R-2 




































2 


2 


2 


2 


NA 




R-3 






































2 


2 


2 


NA 




S-1 








































2 


2 


NA 




S-2 










































2 


NA 




U 












































NA 



Note a. Fire resistance ratings are expressed in hours. 



2/7/97 (Effective 2/28/97) 780 CMK - Sixth Edition 61 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

NON-TEXT PAGE 



62 780 CMR - Sixth Edition 2/7/97 (Effective 2/28/97) 



CHAPTER 4 



SPECIAL USE AND OCCUPANCY 



780 CMR 401.0 GENERAL 

401.1 Scope; In addition to the general requirements 
of 780 CMR governing the location, construction 
and equipment of all buildings and structures, and 
the fireresistance ratings, height and area limitations 
of Tables 503 and 602, the provisions of 780 CMR 
4 shall control all buildings and structures designed 
for special occupancies as herein provided. 

401.2 Applicable Massachusetts General Law: 
Applicable Massachusetts General Laws, and 
applicable rules and regulations, specifically (but 
not limited to) the referenced portions 310 CMR, 
521 CMR, 522 CMR and 527 CMR series as listed 
in Appendix A shall be adhered to in the design 
and construction of buildings and and structures 
subject to the provisions of 780 CMR 4. 

780 CMR 402.0 COVERED MALL BUILDINGS 

402.1 Scope: The provisions of 780 CMR 402.0 
shall apply to buildings or structures defined herein 
as covered mall buildings not exceeding three floor 
levels in height at any one point. Except as 
specifically required by 780 CMR 402.0, covered 
mall buildings shall meet all applicable provisions of 
780 CMR. 

Exceptions: Where approved by the code official, 
the following occupancies are not required to 
comply with the provisions of 780 CMR 402.0. 

1. Foyers and lobbies in occupancies in Use 
Group B,R-1 orR-2. 

2. Buildings which comply totally with all other 
applicable provisions of 780 CMR. 

402.2 Definitions: The following words and terms 
shall, for the purposes of 780 CMR 402.0 and as 
used elsewhere in 780 CMR, have the meanings 
shown herein. 

Anchor store: An exterior perimeter department 
store or major merchandising or magnet center 
having direct access to a mall and having its 
required exits independent of the mall. 

Gross leasable area: The gross leasable area is the 
total floor area designed exclusively for tenant 
occupancy. The area of tenant occupancy is 
measured fi'om the center lines of joint partitions 
to the outside of the tenant walls. 

Mall: A mall is a roofed-over common pedestrian 
area serving more than one tenant located within 
a covered mall building. 



Mall building, covered: A building enclosing a 
number of tenants and occupancies such as retail 
stores, drinking and dining establishments, 
entertainment and amusement facilities, passenger 
transportation terminals, offices and other similar 
occupancies wherein two or more tenants have a 
main entrance into one or more malls. Anchor 
stores shall not be considered as part of the 
covered mall building. 

402.3 Lease plan: The owner or permit holder shall 
provide both the building and fire departments with 
a lease plan showing the locations of each 
occupancy and its means of egress after the 
certificate of occupancy has been issued. Such plans 
shall be kept current. Modifications or changes in 
occupancy shall not be made fi-om that shown on the 
lease plan without prior approval. 

402.4 Tenant separations: Each tenant space shall 
be separated fi-om other tenant spaces by a fire 
partition having a fireresistance rating of not less 
than one hour. Ihefire partition shall comply with 
780 CMR 711.0 except that t\itfire partition is not 
required to extend beyond the underside of a ceiling 
that is not part of a fireresistance rated assembly. A 
wall is not required in attic or ceiling spaces above 
tenant separation walls nor is a tenant separation 
wall required between any tenant space and a mall, 
except for occupancy separations required elsewhere 
in 780 CMR. 

402.4.1 Anchor store openings: Openings 
between an anchor store and the pedestrian area of 
a mall are not required to be protected. 

40Z4.2 Party wall exemption: Anchor stores 
located on separate lots shall not be required to 
provide party walls between the anchor store and 
the covered mall bulling. 

402.5 Egress: Each individual occupancy within the 
covered mall building shall be provided with a 
means of egress in accordance with other provisions 
of 780 CMR. Measurements shall be made to the 
entrance to the mall. 

402.5.1 Travel distance: The maximum length of 
exit access travel from any point within the mall 
to an approved exit along the natural and 
unobstructed path of travel shall not exceed 200 
feet (60960 mm). 

402.5.2 Anchor store exits: Anchor stores shall 
provide the required number of exits and the 
minimum width for the required exit capacity 
directly to the exterior. The occupant load of 



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63 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



anchor stores opening into the mall shall not be 
included in determining exit requirements for the 
mall. 

402.5.3 Dead ends: The dead end of a mall shall 
not exceed twice the width of the mall. 

402.5.4 Design occupant load: In determining 
required exit facilities of the mall, the number of 
occupants for whom exit facilities are to be 
provided shall be based on gross leasable area of 
the covered mall building (excluding anchor 
stores) and the occupant load factor as determined 
by the following formula: 

OLF = (0.00007) (GLA) + 25 

where: 

OLF = The occupant load factor (square feet per 

person). 

GLA = The gross leasable area (square feet). 

The occupant load factor (OLF) is not required 
to be less than 30 and shall not exceed 50. 

402.5.5 Exit access width: The minimum width 
of exit access passageways and corridors from a 
mall shall be 66 inches (1676 mm). 

402.5.6 Exit distribution: The required exits and 
exit widths shall be distributed equally throughout 
the mall. 

402.5.7 Storage prohibited: Storage is prohibited 
in exit corridors that are used for service to 
tenants. Such corridors shall be posted with 
conspicuous signs so stating. 

402.5.8 Passenger transportation terminals: A 

covered mall building whose primary purpose is 
a passenger transportation terminal shall comply 
with the means of egress requirements for Use 
Group A- 3. 

402.5.9 Service areas fronting on exit 
passageways and corridors: Mechanical rooms, 
electrical rooms, building service areas and 
service elevators are permitted to open directly 
into exit passageways and exit corridors provided 
that the required fireresistance rating of the exit 
enclosure is maintained. 

402.6 Mall width: The minimum width of the mall 
shall be 20 feet (6096 mm). There shall be a 
minimum often feet (3048 mm) clear exit width to 
a height of eight feet (2438 mm) between any 
projection of a tenant space bordering the mall and 
the nearest kiosk, vending machine, bench, display 
opening or other obstruction to means of egress 
travel. The mall width shall be sufficient to 
accommodate the occupant load emptying into the 
immediately adjacent mall as determined by 
780 CMR 402.5.4 for all occupancies except Use 
Groups A and E which shall be determined by 
780 CMR 1008.0 



402.7 Structural elements: Covered mall buildings 
shall be of Type 1,2 or 4 construction. Covered mall 
buildings three stories or less in height are exempt 
from the area limitations of Table 503 

402.7.1 Structural elements, anchor stores: An 

anchor store three stories or less in height shall be 
of Type 1, 2 or 4 construction and is exempt from 
the area limitations of Table 503, provided that a 
smoke control system conforming to 780 CMR 
921.0 is installed in the anchor store. For the 
purposes of the design and operation of the fire 
emergency ventilation system, the anchor store 
shall be considered a tenant space zone. 

402.8 Roof coverings: Roof coverings for covered 
mall buildings shall be of Class A, B or C as 
required by 780 CMR 1506 0. 

402.9 Use Groups A-1 and A-2: Use Group A-1 
and A-2 occupancies shall not have more than one- 
half of their required means of egress opening 
directly to the maU (see 780 CMR 1006.2.2). 

402.10 Sprinkler system: The mall and all 
buildings connected thereto shall be equipped 
throughout with an automatic sprinkler system in 
accordance with 780 CMR 906.2.1 The system 
shall be installed in such a manner that when any 
portion of the system serving tenant spaces is shut 
down, the portion of the system serving the mall will 
remain operational. 

402.11 Standpipes: There shall be a standpipe hose 
connection located within the mall at each entrance 
to an exit passageway, exit corridor or enclosed 
stairway and at all exterior entrances to the mall. 
The hose connection shall be supplied from the 
automatic sprinkler system of the mall or from a 
separate standpipe system The water supply shall 
be capable of dehvering 250 gallons per minute 
(gpm) (0.016 mVs). 

402.12 Smoke control: The mall and adjacent tenant 
spaces shall be equipped with a smoke control 
system conforming to 780 CMR 921.0. 

402.13 Fire department access to equipment 
controls: Fire protection system and HVAC system 
controls shall be identified, and the fire department 
shall have access thereto. 

402.14 Plastic panels and plastic signs: Within 
every story or level and from side wall to side wall 
of each tenant space, approved plastic panels and 
signs shall be limited as specified in 780 CMR 
402.14.1 through 402.14.4 

402.14.1 Area: The panels and signs shall not 
exceed 20% of the wall area facing the mall 

402.14.2 Height and width: The panels and signs 
shall not exceed a height of 36 inches (914 mm), 



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SPECL^L USE AND OCCUPANCY 



except if the panel or sign is vertical, the height 
shall not exceed 96 inches (2438 mm) and the 
width shall not exceed 36 inches (914 mm). 

402.14J Location: The panels and signs shall be 
located a minimum distance of 18 inches (457 
mm) firom adjacent tenants. 

402.14.4 Encasement: All edges and the backs 
shall be fully encased in metal. 

402.15 Kiosks: Kiosks and similar structures 
(temporary or permanent) shall meet the 
requirements of 780 CMR 402.15.1 through 
402.15.4. 

402.15.1 Construction: Combustible kiosks or 
other structures shall not be located within the 
mall unless constructed of fireretardant-treated 
wood throughout conforming to 780 CMR 
2310.0. 

402.15.2 Fire suppression: Kiosks and similar 
structures that are covered and are located within 
the mall shall be protected by an automatic 
sprinkler system installed in accordance with 
780 CMR 9. 

402.15.3 Horizontal separation: The minimum 
horizontal separation between kiosks and other 
structures within the mall shall be 20 feet (6096 
mm). 

402.15.4 Maximum area: Kiosks or similar 
structures shall have a maximum area of 300 
square feet (27.90 m^). 

402.16 Parking structures: An attached garage for 
the storage of passenger vehicles that have a 
capacity of not more than nine persons, or an open 
parking structure, shall be considered as a separate 
building where it is separated from the covered mall 
building by a fire separation assembly having a 
fireresistance rating of not less than two hours or 
shall be considered as part of the covered mall 
building. 

780 CMR 403.0 fflGH-RISE BUILDINGS 

403.1 Applicability: The provisions of 780 CMR 
403.0 shall apply to all buildings more than 70 feet 
in height above the mean grade. See M.G.L. c. 
148,§26A. 

Exception: The provisions of 780 CMR 403.0 
shall not apply to open parking structures (see 
780 CMR 406.0 and M.G.L. c. 148, § 26G). 

403.2 Sprinkler system: All buildings and 
structures shall be equipped throughout with an 



automatic sprinkler system in accordance with 
780 CMR 906.2.1 and M.G.L. c. 148, § 26A. 

Exception; An automatic sprinkler system shall 
not be required in spaces or areas of: 

1. Open parking structures complying with 
780 CMR 406.0. 

2. Telecommunications equipment buildings 
used exclusively for telecommunications 
equipment, associated electrical power 
distribution equipment, batteries and standby 
engines, provided that those spaces or areas are 
equipped throughout with an automatic fire 
detection system in accordance with 780 CMR 
918.0 and are separated from the remainder of the 
building with fire separation assemblies 
consisting of one-hour fireresistance rated walls 
and two-hour fu'eresistance rated floor/ceiling 
£issemblies. 

4033 Alternative sprinkler system: Alternatively, 
to qualify for the fireresistance rating reduction for 
certain building elements Usted in 780 CMR 403.3.3, 
the automatic sprinkler system shall comply with 
780 CMR 906.2.1 and the optional fire protection 
features hsted in 780 CMR 403.3.1 and 403.3.2. 

403J.1 Control valves and water-flow devices: 

Sprinkler control valves equipped with 
supervisory initiating devices and water-flow 
initiating devices shall be provided for each floor. 

403.3.2 Secondary water supply: In addition to 
the main water supply, for buildings located 
where the effective peak velocity-related 
acceleration {A^ is equal to or greater than 0.20 in 
accordance with 780 CMR 1612.1, a secondary 
on-site water supply equal to the hydraulically 
calculated sprinkler design demand plus 100 
gallons per minute (0.0063 mVs) shall be 
provided. This water supply shall have a duration 
of 30 minutes. 

4033 J Automatic sprinkler system alternative: 
Where a complete automatic sprinkler system 
with additional system features listed in 780 CMR 
403.3.3.1 and 403.3.3.2 is installed throughout, 
modifications to this code are permitted as 
described in 780 CMR 403.3.3.1 and 403.33.2. 

40333.1 Type of construction: Other than in 
buildings with an occupancy in Use Groups F- 
1, H-3, M and S-1, the minimum type of 
construction required by 780 CMR shall be 
modified as indicated in Table 403.3.3.1. 

Exception: The Type lA to IB 
modification shall be permitted for 
buildings with an occupancy in Use Groups 
F-l,MandS-l. 



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65 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



Table 403.3.3.1 

TYPE OF CONSTRUCTION 

MODIFICATIONS PERMrTTED FOR 

HIGH-RISE BUILDINGS 



Type of Constriction set 
forth in Table 602 


Modified type of construction 
permitted hereunder 


lA 
IB 
2A 


IB 

2a" 
2B 



Note a. The minimum fireresistance rating floor 
construction shall be two hours. 

403.3.3.2 Shaft enclosures: The required 
fireresistance rating of the fire separation 
assemblies enclosing vertical shafts, other 
than stairway enclosures and elevator 
hoistway enclosures, shall be reduced to one 
hour where automatic sprinklers are 
installed within the shafts at the top and at 
alternate floor levels. 

403.4 Automatic fire detection: A smoke detector 
suitable for the intended application shall be 
installed in each of the following rooms: mechanical 
equipment; electrical; transformer; telephone 
equipment; elevator machine; or similar room. The 
actuation of any detector shall sound an alarm at a 
constantly attended location. 

403.5 Voice/alarm signaling systems: A 

voice/alarm signaling systerrt shall be provided in 
accordance with 780 CMR 917.9 and activated in 
accordance with 780 CMR 917.7.1. 

403.6 Fire department communication system: A 

two-way fire department communication system 
shall be provided for fire department use. The 
communication system shall operate between the^re 
command station and every elevator, elevator lobby 
and enclosed exit stairway. Acceptable types of fire 
department communications shall include: 

1. Telephone or fire department radio in lieu of 
a dedicated system, where approved by the fire 
department; and 

2. Intercom or two-way public address system 
complying with NFiPA 72 listed in Appendix A. 

403.7 Fire command station: A fire command 
station for fire department operations shall be 
provided In a location approved by the fire 
department. The^re command station shall contain: 
the voice/alarm signaling system controls; the fire 
department communication system controls; the 
automatic fire detection and protective signaling 
system annunciator panels; an armunciator that 
visually indicates the floor location of elevators and 
whether they are operational; status indicators and 
controls for air-handling systems; controls for 
unlocking all stairway doors simultaneously; 
sprinkler valve and water-flow detector display 
panels; emergency and standby power; status 
indicators; and a telephone for fire department use 



with controlled access to the public telephone 
system. 

403.8 Elevators: Elevator operation and installation 
shall be in accordance with 524 CMR. Elevator 
service shall be provided for fire department 
emergency access to all floors. Elevator cab 
dimensions shall conform to the applicable 
requirements of 524 CMR. 

Except for the main entrance level, all elevators 
shall open into a lobby separated fi"om the remainder 
of the building by one hour fireresistance rated 
construction. 

Exit stairways, chutes, janitor closets, tenant 
spaces in Use Group R and service rooms shall not 
open into the elevator lobby. In Use Groups other 
than R, tenant spaces opening into the elevator lobby 
shall be provided with other means of exit access 
that do not require passage through the elevator 
lobby. 

Exception: elevator lobbies are not required 
when a smoke control system is installed in 
accordance with 780 CMR 921.7. 

403.9 Standby power, light and emergency 
systems: Standby power, light and emergency 
systems shall comply with the requirements of 
780 CMR 403.9.1 through 403.9.3. 

403.9.1 Standby power: A standby power system 
conforming to the requirements of 527 CMR as 
listed in Appendix A. If the standby system is a 
generator set inside a building, the system shall be 
located in a separate room enclosed with two-hour 
fireresistance rated fire separation assemblies. 
System supervision with manual start and transfer 
features shall be provided at the^^re command 
station. 

403.9.1.1 Fuel supply: An on-premises fuel 
supply, sufficient for not less than two-hour 
fliU-demand operation of the system, shall be 
provided. 

Exception: Where the system is supplied 
with pipeline natural gas and is approved. 

403.9.1.2 Capacity: The standby system shall 
have a capacity and rating that supplies all 
equipment required to be operational at the 
same time. The generating capacity is not 
required to be sized to operate all of the 
connected electrical equipment simultaneously. 

403.9.1.3 Connected facilities: All power and 
lighting facilities for l\\t fire command station 
and elevators specified in 780 CMR 403.7 and 
403.8, as applicable, and electrically powered 
fire pumps required to maintain pressure, shall 
be transferable to the standby source. Standby 
power shall be provided for at least one 
elevator to serve all floors and be transferable 
to any elevator. 



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SPECIAL USE AND OCCUPANCY 



403.9.2 Separate circuits and fixtures: Separate 
lighting circuits and fixtures shall be required to 
provide sufficient light with an intensity of not 
less than one footcandle (10.76 lux) measured at 
floor level in all means of egress corridors, 
stairways, smokeproof enclosures, elevator cars 
and lobbies, and other areas which are clearly a 
part of the escape route. 

403.9.2.1 Other circuits; All circuits 
supplying lighting for i\\tfire command station 
and mechanical equipment rooms shall be 
transferable to the standby source. 

403.9.3 Emergency systems: Exit signs, exit 
illumination as required by 780 CMR 1024.0, and 
elevator car lighting are classified as emergency 
systems and shall operate within ten seconds of 
failure of the normal power supply and shall be 
capable of being transferred to the standby source. 

Exception: Exit sign, exit and means of egress 
illumination are permitted to be powered by a 
standby source in buildings of Use Groups F 
andS. 

403.10 Stairway door operation: All stairway 
doors which are to be locked from the stairway side 
shall be capable of being unlocked simultaneously 
without unlatching upon a signal from the fire 
command station. 

403.10.1 Stairway communication system: A 

telephone or other two-way communication 
system connected to an approved constantly 
attended station shall be provided at not less than 
every fifth floor in each required stairway where 
the doors to the stairway are locked. 

403.11 Smokeproof enclosures: A smokeproof 
enclosure, as set forth in 780 CMR 1015.0 is 
required for at least one exit. Other required 
stairways greater than 70 feet in height shall be 
pressurized to a minimum of 0.1 5 inches of water 
column, but not exceeding 0.35 inches of water 
column. Such required stairway pressurization 
being relative to building pressure and with all 
stairway doors closed. Pressurization design shall 
take into consideration maximum anticipated stack 
pressure effects in the stairway. 

The stairway pressurization system shall be 
activated by any devices which are required to 
activate the voice alarm system described in 
780 CMR 403.5. 

780 CMR 404.0 ATRIUMS 
404.1 General: The term "atrium" shall mean an 
occupied space that includes a floor opening or 
series of floor openings, which connects two or more 
stories. An atrium shall comply with 780 CMR 
404.0 where a shaft enclosure is required by 
780 CMR 713.3. Atriums shall be permitted in all 



occupancies, other than Use Group H, where 
provided with the protection herein required. 

404.2 Automatic sprinkler system: The atrium and 
all stories and floor areas connected to the atrium 
shall be equipped throughout with an automatic 
sprinkler system in accordance with 780 CMR 
906.2.1. The automatic sprinkler system shall be 
supervised in accordance with 780 CMR 923.1, 
method 1, 2 or 3. 

Exception: An automatic sprinkler system shall 
not be required in areas separated from the atrium 
hyfire separation assemblies in accordance with 
780 CMR 709.0. 

404.3 Atrium occupancy: The floor of the atrium 
shall not be occupied for other than low fire-hazard 
occupancies and only approved materials and 
decorations shall be located in the atrium space. 

Exception: The occupancy of the atrium floor 
area for any approved purpose shall not be 
restricted where the hazard is protected with an 
automatic sprinkler system installed in accordance 
with 780 CMR 906.2.1. 

404.3.1 Exit discharge: Exit discharge in 
accordance with 780 CMR 1020.0 is permitted 
within the atrium. 

404.4 Smoke control: A smoke control system 
complying with 780 CMR 921.0 shall be installed in 
all atriums that connect more than two stories. 

404.5 Enclosure of atriums: Atrium spaces shall be 
separated from adjacent spaces by a one-hour j?/'e 
partition as required for corridors. 

Exceptions 

1 . In residential occupancies, protected openings 
are not required where the floor area of each guest 
room or dwelling unit does not exceed 1,000 
square feet (93 m^) and each room or unit has an 
approved means of egress not entering the atrium. 

2. Adjacent spaces shall be separated from the 
atrium by fire windows or by a tempered, wired, 
laminated glass or glass-block wall subject to the 
following criteria: 

2.1. The glass shall be protected by a 
specially designed automatic sprinkler system. 
The sprinkler system shall completely wet the 
entire surface of the glass wall when actuated. 
Where there are walking surfaces on both sides 
of the glass, both sides of the glass shall be so 
protected; 

2 2. The tempered, wired or laminated glass 
shall be in a gasketed frame and installed in 
such a manner that the framing system will 
deflect without breaking {loading) the glass 
before the sprinkler system operates; 
2.3. The glass-block wall assembly shall be 
installed in accordance with the listing for a Vi- 



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67 



780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



hour fireresistance rating and the requirements 

of780 CMR 2115.0; and 

2.4. Obstructions, such as curtain rods, 

drapery traverse rods, curtains, drapes or 

similar materials shall not be installed between 

the automatic sprinklers and the glass. 

3. The adjacent spaces of any three floors of the 

atrium shall not be required to be separated from 

the atrium; however, these spaces shall be 

included in the atrium volume for the design of 

the smoke control system (see 780 CMR 921.0). 

404.6 Signaling system: A fire protective signaling 
system shall be installed in all occupancies with an 
atrium that connects more than two stories. The 
system shall be activated in accordance with 
780 CMR 917.7. L Such occupancies in Use Group 
A, E or M shall be provided with a voice/alarm 
signaling system complying with the requirements of 
780 CMR 917.9. 

404.7 Travel distance: In other than the lowest level 
of the atrium, where the required means of egress is 
through the atrium space, the portion of exit access 
travel distance within the atrium space shall not 
exceed 150 feet (45720 mm). 

780 CMR 405.0 UNDERGROUND 
STRUCTURES 

405.1 Applicability: The provisions of 780 CMR 
405.0 apply to aU structures having a floor level 
used for human occupancy more than 30 feet (9144 
mm) below, or more than one story below, the 
lowest level of exit discharge serving that floor level. 

Exception: The provisions of 780 CMR 405.0 
shall not apply to the following structures: 

1. Occupancies in Use Group R-3 equipped 
throughout with an automatic sprinkler system in 
accordance with 780 CMR 906.0. 

2. Public garages equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.0. 

3 . Fixed guideway transit systems. 

4. Occupancies in Use Group A-5. 

5. Structures wherein the lowest story is the only 
story that qualifies the structure as an 
underground structure and which have an area not 
exceeding 1,500 square feet (140 m^ and an 
occupant load less than ten. 

405.2 Construction: The underground portion of the 
structure shall be of Type 1 construction. 

405.3 Automatic sprinkler system: The highest 
level of exit discharge serving the underground 
portions of the structure and all levels below shall be 
equipped throughout with an automatic sprinkler 
system in accordance with 780 CMR 906.0. 



405.4 Compartmentation: In structures that have a 
floor level more than 60 feet (18288 mm) below the 
lowest level of exit discharge, the highest level of 
exit discharge serving the underground portions of 
the structure and all levels below shall each be 
divided into a minimum of two compartments of 
approximately equal size by a smoke barrier in 
accordance with 780 CMR 712.0. 

Exception: Two compartments are not required in 
the lowest story where such story has an area of 
less than 1,500 square feet (140 m") and an 
occupant load of less than ten. 

405.4.1 Smoke barrier penetrations: 

Penetrations of the smoke barrier shall be limited 
to plumbing and automatic sprinkler system 
piping and electrical raceways. The air supply, 
return and exhaust system provided in one 
compartment shall be independent of such 
systems provided in other compartments. 

405.4.2 Elevators: Where elevators are provided, 
each compartment shall have direct access to an 
elevator. Where an elevator serves more than one 
compartment, an elevator lobby shall be provided 
and shall be separated from both compartments by 
afire separation assembly having not less than a 
one-hour fireresistance rating. 

405.4.3 Egress: Each compartment shall contain 
not less than one exit and shall also have an exit 
access doorway into the adjoining compartment. 

405.5 Smoke exhaust system: Where 
compartmentation is required by 780 CMR 405.4, 
each compartment shall have an independent 
automatically activated smoke exhaust system 
capable of manual operation. The system shall have 
an air supply and smoke exhaust capability which 
will provide a minimum of six air changes per hour. 

405.5.1 Automatic fire detection: A smoke 
detector complying with 780 CMR 918.8 and 
suitable for the intended use shall be installed in 
each of the following rooms: mechanical 
equipment; electrical; transformer; telephone 
equipment; elevator machine; or similar room. 
The actuation of any detector shall sound an alarm 
at a constantly attended location. 

405.5.2 Activation: The smoke exhaust system 
shall be activated in the compartment of origin by 
actuation of the following, independently of each 
other: 

1. Automatic sprinkler system; 

2. Smoke detectors required by 780 CMR 
405.5.1; and 

3. Manual controls provided for fire 
department use. 

405.6 Fire protective signaling system: Where the 
lowest level of a structure is more than 60 feet 
(18288 mm) below the lowest level of exit 



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SPECIAL USE AND OCCUPANCY 



discharge, the structure shall be equipped 
throughout with a fire protective signaling system in 
accordance with 780 CMR 917.0, including a 
voice/alarm signaling system installed in accordance 
with 780 CMR 917.9 and activated in accordance 
with 780 CMR 917.7.1. 

405.7 Public address: Where a fire protective 
signaling system is not required by 780 CMR 405.6 
or 917.4, a public address system shall be provided 
which shall be capable of transmitting voice 
communications to the highest level of exit 
discharge serving the underground portions of the 
structure and all levels below. 

405.8 Standby power: A standby power system of 
sufBcient capacity and rating and conforming to the 
requirements of 527 CMR 12.00 as listed in 
Appendix A shall be provided. 

405.8.1 Fuel supply: If the standby system is a 
generator set inside a structure, the system shall 
be located in a separate room enclosed with two- 
hour fireresistance fire rated Jire separation 
assemblies. System supervision with manual start 
and transfer features shall be provided at the 
central station. 

405.8.2 Capacity: The standby system shall 
supply the following required systems; 

1 . Smoke exhaust system. 

2. Smokeproof enclosure. 

3 . Fire pumps. 

4. One elevator to serve all floors with the 
capability of transferring power to any 
elevator. 

5. Emergency electrical system. 

405.9 Emergency power: An emergency electrical 
system of sufBcient capacity and rating and 
conforming to the requirements of 527 CMR 12.00 
as listed in Appendix A shall be provided. The 
emergency system shall supply the following 
required systems: 

1 . Voice communication system. 

2. Fire protective signaling system. 

3. Fire detection systems. 

4. Elevator car lighting. 

5. Means of egress lighting and exit sign 
illumination. 

780 CMR 406.0 OPEN PARKING 
STRUCTURES 

406.1 General: Open parking structures are those 
structures used for the parking or storage of 
passenger motor vehicles designed to carry not more 
than nine persons, wherein provision for the repair 
of such vehicles is not made and where the exterior 
walls of the structure have openings on not less than 
two sides. Open parking structures are not required 
to conform to 780 CMR 408.0 for public garages. 



406.1.1 Openings: The exterior walls of the open 
parking structure shall have uniformly distributed 
openings on not less than two sides totaling not 
less than 40% of the building perimeter. The 
aggregate area of such openings in exterior walls 
in each level shall not be less than 20% of the 
total perimeter wall area of each level. Interior 
wall lines and column lines shall be at least 20% 
open with openings distributed to provide 
ventilation. 

Exception: Openings are not required to be 
distributed over 40% of the building perimeter 
where the required openings are uniformly 
distributed over two opposing sides of the 
building. 

406.1.2 Separation: Exterior walls containing 
openings shall have afre separation distance of 
greater than ten feet (3048 mm). 

406.2 Construction requirements: Passenger 
vehicle structures shall be constructed of approved 
non combustible materials throughout, including 
structural fi"aming, floors, roofs and walls. Any 
enclosed room or space on the premises shall 
comply with the applicable requirements of 
780 CMR. 

406.3 Fuel dispensing: Areas where fuel is 
dispensed shall conform to the requirements of 
780 CMR 408.4. 

406.4 Heights and areas: Heights and areas of open 
parking structures shall not exceed the limitations 
specified in Table 406.4, except as provided for in 
780 CMR 406.4.1. The heights and areas are 
subject to the increases indicated in 780 CMR 504.0 
and 506.0. The above height limitations permit 
parking on the roof 

Table 406.4 

HEIGHT AND AREA LIMITATIONS FOR 

OPEN PARKING STRUCTURES 



Type of 
coQStruction 


Height* 


Area (square feet) 


lAandlB 
2A 
2B 


Unlimited 
! 2 Stories -120 feet 
10 Stories -too feet 
S_Stones-85feet 


Unlimited 

Unlimited 

50,000 

50.000 



Note a. 1 foot = 304.8 mm; 1 square foot = 0.093 m 

406.4.1 Unlimited area: Structures with all sides 
open shall be unlimited in area provided that the 
height does not exceed 75 feet (22860 mm). For 
a side to be considered open, the total area of 
openings along the side shall not be less than 50%i 
of the exterior area of the side at each parking 
level and such openings shall be equally 
distributed along the length of each level All 
portions of each parking level shall be within 200 
feet (60960 mm) horizontally fi-om an exterior 
wall opening on any permanent open space. 



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406.5 Guards; All open-sided floor areas shall be 
provided with a guard in accordance with 780 CMR 
1021.0, except that in those structures wherein 
vehicles are hoisted to the desired level and placed 
in the parking space entirely by approved 
mechanical means, the guard is not required on the 
side of the paricing levels adjacent to the space 
occupied by the hoisting and placing equipment. 

406.6 Wheel guards: Wheel guards made of 
approved noncombustible material shall be placed 
wherever required. 

780 CMR 407.0 PRIVATE GARAGES 

407.1 General: Private garages shall comply with 
the requirements of 780 CMR 407.0. All private 
garages not falling within the purview of 780 CMR 
407.3 through 407.7 and which are attached to or 
located beneath a building shall comply with the 
requirements of 780 CMR 3 13.0 for public garages. 

407.2 Definitions: The following words and terms 
shall, for the purposes of 780 CMR 407.0 and as 
used elsewhere in 780 CMR, have the meanings 
shown herein. 

Garage, private: A garage for four or less passenger 
motor vehicles, four or less single motor 
airplanes, or one commercial motor vehicle, 
without provision for repairing or servicing such 
vehicles for profit. 

407.3 Beneath rooms: Private garages located 
beneath habitable rooms in occupancies in Use 
Group R-1, R-2, R-3 or I-l shall be separated from 
adjacent interior spaces by fire partitions and 
floor/ceiling assemblies which are constructed with 
not less than a one-hour fireresistance rating. Wood 
structural members of the minimum dimensions 
specified in 780 CMR 2304.0 for Type 4 
construction shall be acceptable without any fiarther 
protection where a one-hour fireresistance rating is 
required. 

407.4 Attached to rooms: Private garages attached 
side-by-side to rooms in occupancies in Use Group 
R-1, R-2, R-3 or I-l shall be completely separated 
from the interior spaces and the attic area by means 
of Vs-inch Type-X gypsum board or the equivalent 
applied to the garage side. 

407.5 Door sills: The sills of all door openings 
between /^rrvate garages and adjacent interior spaces 
shall be raised not less than four inches (102 mm) 
above the garage floor. 

407.6 Opening protectivcs: The door opening 
protectives shall comply with one of the following. 

1, lYi-inch solid core wood door. 



2. iy4-inch solid or honeycomb core steel door 

407.7 Firestopping of concealed spaces: Where a 
garage is connected to an occupancy in Use Group 
R-3 by a concealed space, such as a breezeway, that 
is of Type 5B construction and ten feet (3048 mm) 
or greater in length, the junction of the garage and 
the concealed space shall he Jirestopped to comply 
with 780 CMR 720.0. 

407.8 Means of egress: Where living quarters are 
located above a private garage, the required means 
of egress facilities shall be separated from the garage 
area with one-hour fireresistance rated construction. 

780 CMR 408.0 PUBUC GARAGES 

408.1 General: Public garages shall comply with 
the applicable requirements of 780 CMR 408.0. 
Those portions of public garages where paint 
spraying is done shall comply with the requirements 
of780 CMR 419.0. 

408.2 Definitions: The following words and terms 
shall, for the purposes of 780 CMR 408.0 and as 
used elsewhere in 780 CMR have the meanings 
shown herein. 

Garage, public: A building or structure for the 
storage or parking of more than four passenger 
motor vehicles, motor-powered boats or private or 
commercial airplanes, or more than one 
commercial motor vehicle. Public garages shall 
be classified in one of the following groups 
according to their specific occupancies: 
Group 1: A public garage occupied for the 
storage, parking, repairing or the painting of, or 
the dispensing of fuel to, motor vehicles. 
Group 2: A public garage occupied exclusively 
for passenger vehicles that will accommodate not 
more than nine passengers. 

408.3 Construction: All Group 1 public garages 
hereafter erected shall be classified as Use Group S- 
1 and all Group 2 ptblic garages shall be classified 
as UseGroiip S-2; both shall conform to the height 
and area limitations of Table 503 except as 
specifically provided for herein. 

408.3.1 Sprinkler system: All public garages 
shall be equipped throughout with an automatic 
sprinkler system in accordance wifh 780 CMR 
906.2.1: 

1. Where any fire area exceeds 12,000 square 
feet (II 16 m^); 

2. Where the total area of all^^re areas on all 
floors exceeds 24,t)00 square feet (2232 m^); 

3. Where a.ny fire area is more than three 
stories above grade; or 

4. Where located beneath other use groups. 



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For the purposes of 780 CMR 408.0, a roof 
occupied for the parking or storage of motor 
vehicles shall not constitute a story. 

408.3.2 Roof storage of motor vehicles: Where 
the roof of a building is occupied for the parking 
or storage of motor vehicles, such roof shall be 
provided with a parapet wall or a guard 
constructed in accordance with 780 CMR 1021.0, 
and with a wheel guard not less than six inches 
(152 mm) in height that is located so as to prevent 
any vehicle from striking the parapet wall or 
guard. 

408.3.3 Floor construction: The floor finish of 
public garages, including airplane hangers, shall 
be of concrete or other approved nonabsorbent, 
noncombustible material. 

408.4 Fuel-dispensing areas: Fuel-dispensing areas 
shall be located on the level nearest grade. Public 
garages with fuel-dispensing areas shall be 
completely separated from any other use group by 
flre separation assemblies having a minimum 
fireresistance rating of two hours. The floors of the 
fuel-dispensing areas shall be graded to a floor 
drainage system such that any fuel spill or leak is 
contained within the area. The drainage system shall 
conform to the requirements of the plumbing code 
listed in Appendix A. The fuel-dispensing area shall 
be equipped with an automatic sprinkler system in 
accordance with 780 CMR 9. 

408.4.1 Fuel-dispensing systems: All fijel- 
dispensing and fiiel storage systems shall conform 
to the requirements of the mechanical code listed 
in Appendix A. 

408.5 Ventilation: All public garages shall be 
ventilated in accordance with the mechanical code 
listed in Appendix A. Fuel-dispensing areas shall be 
mechanically ventilated. 

408.6 Special hazards: Any process conducted in 
conjunction with public garages which involves 
volatile flammable solvents shall be segregated or 
located in a detached building or structure, except as 
provided for in 780 CMR 418.0 for the storage and 
handling of gasoline and other \old.t\le flammables. 
The quantity oi flammable liquids stored or handled 
in public garages except in underground storage 
tanks, in special enclosures where permitted in 
accordance with NFtPA 30A and the fire prevention 
code listed in Appendix A, and in the tanks of motor 
vehicles — shall not be more than five gallons (0.019 
m^) in approved safety cans. 

780 CMR 409.0 USE GROUP 1-2 
409.1 General: All occupancies in Use Group 1-2 
shall comply with the provisions of 780 CMR 409.0 
and all other applicable provisions of 780 CMR, 
except that 780 CMR 409.0 shall not apply to 



occupancies in Use Group 1-2 that are not equipped 
throughout with an automatic sprinkler system in 
accordance with 780 CMR 906.0. 

Note: Hospitals, nursing homes and 
convalescent homes shall be constructed of Type 
I construction, in accordance with M.G.L. 
c. Ill, §§51 and 71. 

409.2 Corridors: All corridors in occupancies in 
Use Group 1-2 shall be continuous to the exits and 
separated from all other areas except waiting ai eas, 
nurses' stations and mental health treatment areas 
conforming to 780 CMR 409.2. 1 through 409.2.4. 

409.2.1 Waiting areas: Waiting areas shall not be 
open to the corridor, except where all of the 
following criteria are met: 

1. The aggregate area of waiting areas in each 
smoke compartment does not exceed 600 
square feet (56m^); 

2. Each area is located to permit direct visual 
supervision by facility staff; 

3. Each area is equipped with an automatic 
fire detection system installed in accordance 
with 780 CMR 9 18.0; and 

4. Each area is arranged so as not to obstruct 
access to the required exits. 

409.2.2 Waiting areas of unlimited area: Spaces 
constructed as required for corridors shall not be 
open to a corridor, except where all of the 
following criteria are met: 

1. The spaces are not occupied for patient 
sleeping rooms, treatment rooms or specific 
occupancy areas as defined in 780 CMR 
302.1.1; 

2. Each space is located to permit direct 
visual supervision by the facility staff; 

3. Both the space and corridors that the space 
opens into in the same smoke compartment are 
protected by an automatic fire detection system 
installed in accordance with 780 CMR 918.0; 
and 

4. The space is arranged so as not to obstruct 
access to the required exits. 

409.2.3 Nurses' stations: Spaces for doctors' and 
nurses' charting, communications and related 
clerical areas shall not be open to the corridor, 
except where such spaces are constructed as 
required for corridors. 

409.2.4 Mental health treatment areas: Areas 
wherein only mental health patients who are 
capable of self-preservation are housed, or group 
meeting or multipurpose therapeutic spaces other 
than specific occupancy areas as defined in 
780 CMR 302.1.1, under continuous supervision 
by facility staff, shall not be open to the corridor, 
except where all of the following criteria are met: 

1. Each area does not exceed 1,500 square 
feet (140 m-); 



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THE MASSACHUSETTS STATE BUILDING CODE 



2. The area is located to permit supervision by 
the facility staff; 

3. The area is arranged so as not to obstruct 
any access to the required exits; 

4. The area is equipped with an automatic fire 
detection system installed in accordance with 
780 CMR 918.0; 

5. Not more than one such space is permitted 
in any one smoke compartment; and 

6. The wails and ceilings of the space are 
constructed as required for corridors. 

409.3 Corridor walls: Corridor walls shall form a 
barrier to limit the transfer of smoke. The walls 
shall extend from the floor to the underside of the 
floor or roof deck above or to the underside of the 
ceiling above where the ceiling membrane is 
constructed to limit the transfer of smoke. 

409.3.1 Corridor doors: Corridor doors, other 
than those in a wall required to be rated by 
780 CMR 302.1.1 or for the enclosure of a 
vertical opening or an exit, shall not have a 
required fireresistance rating and shall not be 
required to be equipped with self-closing or 
automatic-closing devices, but shall provide an 
effective barrier to limit the transfer of smoke and 
shall be equipped with positive latching. Roller 
latches are not permitted. All other doors shall 
conform to 780 CMR 716.0. 

409.3.2 Locking devices; Locking devices which 
restrict access to the patient room from the 
corridor, and which are operable only by stafiF 
from the corridor side, shall not restrict the means 
ofe^ess from the patient room except for patient 
rooms in mental health facilities. Also see 
780 CMR 1017.4.1.8(2). 

409.4 Smolie barriers: Smoke barriers shall be 
provided to subdivide every story used by patients 
for sleeping or treatment into at least two smoke 
compartments. Such stories shall be divided into 
smoke compartments with an area of not more than 
22,500 square feet (2092 m^) and the travel distance 
from any point in a smoke compartment to a smoke 
barrier door shall not exceed 150 feet (45720 mm). 
The smoke barrier shall be in accordance with 
780 CMR 712.0. 

409.4.1 Refuge area: At least 30 net square feet 
(2.8 m^) per patient shall be provided within the 
aggregate area of corridors, patient rooms, 
treatment rooms, lounge or dining areas and other 
low-hazard areas on each side of each smoke 
barrier. On floors not housing patients confined 
to a bed or litter, at least six net square feet (0.56 
m^ per occupant shall be provided on each side of 
each smoke barrier for the total number of 
occupants in adjoining smoke compartments. 

409.4.2 Independent egress: A means of egress 
shall be provided from each smoke compartment 



created by smoke barriers without having to 
return through the smoke compartment from 
which means of egress originated. 

409.5 Automatic sprinkler system: Smoke 
compartments containing patient sleeping rooms 
shall be equipped throughout with an automatic 
sprinkler system in accordance with 780 CMR 
906.2.1. Patient sleeping rooms shall be equipped 
with quick-response sprinklers. 

409.5.1 Automatic fire detection: Patient 
sleeping rooms in nursing homes (both 
intermediate care and skilled nursing facilities) 
and detoxification facilities shall be provided with 
a smoke detector that is permanently connected to 
the normal power supply and that complies with 
the requirements of UL 217 or UL 268 listed in 
Appendix A. Such detectors shall provide a 
visual display on the corridor side of each patient 
room and shall provide an audible and visual 
alarm at the nursing station attending that room. 
Where such detectors and related devices are not 
combined with the nursing call system, the 
detectors shall be installed in accordance with 
780 CMR 918.0. 

Exceptions: 

1. Smoke detectors are not required in patient 
rooms equipped with automatic door-closing 
devices with integral smoke detectors on the 
room sides installed in accordance with their 
listing, provided that the integral detectors 
perform the required alerting fiinction. 

2. Patient-room smoke detectors installed in 
accordance with 780 CMR 918.0 are not 
required to activate the fire protective signaling 
system where the visual and audible alarms 
required in 780 CMR 409.5.1 are provided. 

3. Sleeping rooms of a child care facility as 
specified in 780 CMR 308.3. 1 . 

780 CMR 410.0 USE GROUP 1-3 

410.1 General: All occupancies in Use Group 1-3 
shall comply with the provisions of 780 CMR 410.0 
and all other applicable provisions of 780 CMR (see 
780 CMR 308.4). 

410.2 Mixed use groups: Portions of buildings with 
an occupancy in Use Group 1-3 which are classified 
as a different use group shall meet the applicable 
requirements of 780 CMR for such use groups. 
Where security operations necessitate the locking of 
required means of egress, provisions shall be made 
for the release of occupants at all times. 

410.3 Means of egress: Except as modified or as 
provided for in 780 CMR 410.0, the provisions of 
780 CMR 10 shall apply. 

410.3.1 Door width: Doors to resident sleeping 
rooms shall have a clear width of not less than 28 
inches (71 1 mm) 



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SPECIAL USE AND OCCUPANCY 



410.3.2 Sliding doors: Where doors in a means of 
egress are of the horizontal-sliding type, the force 
to slide the door to its folly open position shall not 
exceed 50 pounds (222 N) with a perpendicular 
force against the door of 50 pounds (222 N). 

410.3.3 Horizontal exits: Horizontal exits shall 
be permitted to comprise 100% of the exits 
required provided that access to an exit, other than 
a horizontal exit, is available in another fire 
compartment without requiring return through the 
compartment of origin. At least six square feet 
(0.56 m-) of available space per occupant shall be 
provided on each side of the horizontal exit for 
the total number of occupants in the compartment 
served by that exit. 

410.3.4 Spiral stairs and alternating tread 
stairways: Spiral stairs that conform to the 
requirements of 780 CMR 1014.6.4 and 
alternating tread stairways that conform to the 
requirements of 780 CMR 1014.6.6 are permitted 
for access to and in between stafiF locations. 

410.3.5 Exit discharge: Exits are permitted to 
discharge into a fenced or walled courtyard. 
Enclosed yards or courts shall be of a size to 
accommodate all occupants, a minimum of 50 feet 
(15240 mm) fi-om the building with a net area of 
15 square feet (1.4 m^) per person. 

410.3.6 Sallyports: A sallyport shall be permitted 
in a means of egress where there are provisions 
for continuous and unobstructed passage through 
the sallyport during an emergency exiting 
condition. A sallyport is a security vestibule with 
two or more doors where the intended purpose is 
to prevent continuous and unobstructed passage 
by allowing the release of only one door at a time. 

410.3.7 Exit stairways: One of the required exit 
stairways in each building shall be permitted to 
have glazing installed in doors and interior walls 
at each landing level providing access to the 
stairway, provided that all of the following 
conditions are met: 

1. The stairway shall not serve more than four 
floor levels. 

2. Stair doors shall not be less than ^^-hour 
fire doors complying with 780 CMR 716.0. 

3. The total area of glazing at each floor level 
shall not exceed 5,000 square inches (3.23 m'') 
and individual panels of glazing shall not 
exceed 1,296 square inches (0.84 m^). 

4. The glazing shall be protected on both 
sides by an automatic sprinkler system. The 
sprinkler system shall be designed to wet 
completely the entire surface of any glazing 
affected by fire when actuated 

5. The glazing shall be in a gasketed frame 
and installed in such a manner that the framing 
system will detlect without breaking (loading) 
the glass before the sprinkler system operates. 



6. Obstructions, such as curtain rods, drapery 
traverse rods, curtains, drapes or similar 
materials shall not be installed between the 
automatic sprinklers and the glazing. 

410.4 Locks: Egress doors are permitted to be 
locked in accordance with the applicable use 
condition. Doors fi'om an area of refoge to exterior 
are permitted to be locked with a key lock the in lieu 
of locking methods described in 780 CMR 410.4.1. 
The keys to unlock the exterior doors shall be 
available at all times and the locks shall be operable 
from both sides of the door. 

410.4.1 Remote release: All remote release of 
locks on doors in a means of egress shall be 
provided with reliable means of operation, remote 
fi-om the resident living areas, to release locks on 
all required doors. In Occupancy Conditions III 
or IV, the arrangement, accessibility and security 
of the release mechamsm(s) required for egress 
shall be such that with the minimum available 
staff at any time, the lock mechanisms are capable 
of being released within two minutes. 

Exception: Provisions for remote locking and 
unlocking of occupied rooms in Occupancy 
Condition IV are not required provided that not 
more than ten locks are necessary to be 
unlocked in order to move all occupants fi'om 
one smoke compartment to an area of refoge 
within three minutes. The opening of all 
necessary locks shall be accomplished with not 
more than two separate keys. 

410.4.2 Power-operated doors and locks: All 

power-operated sliding doors or power-operated 
locks for swinging doors shall be operable by a 
manual release mechanism at the door, and either 
emergency power or a remote mechanical 
operating release shall be provided. 

410.4.3 Redundant operation: Remote release, 
mechanically operated sliding doors or remote 
release, mechanically operated locks shall be 
provided with a mechanically operated release 
mechanism at each door, or shall be provided with 
a redundant remote release control. 

410.4.4 Relock capability: Doors remotely 
unlocked under emergency conditions shall not 
automatically relock when closed unless specific 
action is taken at the remote location to enable 
doors to relock. 

410.4.5 Emergency power: Emergency power in 
accordance with 527 CMR 12.00 as listed in 
Appendix A shall be provided for all electrically 
power-operated sliding doors and power-operated 
locks. 

Exception: Facilities with ten locks or less 
complying with the exception to 780 CMR 
410.4.1. 



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THE MASSACHUSETTS STATE BUTLDING CODE 



410.5 Vertical openings: Vertical openings shall be 
enclosed in accordance with 780 CMR 713.3. 

Exception; A floor opening between floor levels 
of residential housing areas is permitted without 
enclosure protection between the levels, provided 
that all of the following conditions are met: 

1. The entire normally occupied areas so 
interconnected are open and unobstructed so as 
to enable observation of the areas by 
supervisory personnel. 

2. Means of egress capacity is sufficient to 
provide simultaneous egress for all occupants 
from all interconnected levels and areas. 

3. The height difference between the highest 
and lowest finished floor levels shall not 
exceed 23 feet (7010 mm). Each story, 
considered separately, has at least one-half of 
its individual required means of egress capacity 
provided by exits leading directly out of that 
story without traversing another story within 
the inter-connected area. 

410.6 Smoke barrier: All occupancies in Use 
Group 1-3 shall have smoke barriers complying with 
780 CMR 712.0 to divide every story occupied by 
residents for sleeping, or any other story having an 
occupant load of 50 or more persons, into at least 
two smoke compartments. 

Exception: Spaces having direct exit to one of the 
following, provided that the locking arrangement 
of the doors involved complies with the 
requirements for doors at the compartment barrier 
for the use condition involved: 

1. A. public way, 

2. A building separated from the resident 
housing area by a two-hour fireresistance rated 
assembly or 50 feet (15240 mm) of open space; or 

3. A secured yard or court having a holding 
space 50 feet (15240 mm) from the housing area 
that provides six square feet (0.56 m") or more of 
refijge area per occupant including residents, staff 
and visitors. 

410.6.1 Smoke compartments: The maximum 
number of residents in any smoke compartment 
shall be 200. The travel distance to a door in a 
smoke barrier from any room door required as exit 
access shall not exceed 150 feet (45720 mm). 
The travel distance to a door in a smoke barrier 
from any point in a room shall not exceed 200 feet 
(60960 mm). 

410.6.2 Refuge area: At least six net square feet 
per occupant shall be provided on each side of 
each smoke barrier for the total number of 
occupants in adjoining smoke compartments. 
This space shall be readily available whenever the 
occupants are moved across the smoke barrier in 
a fire emergency. 

410.6.3 Independent egress: A means of egress 
shall be provided from each smoke compartment 



created by smoke barriers without having to 
return through the smoke compartment from 
which means of egress originates. 

410.7 Subdivision of resident housing areas: 

Sleeping areas including an individual cell or 
dormitory and any contiguous day room, group 
activity space or other common spaces where 
residents are housed shall be separated from all other 
spaces in accordance with 780 CMR 410.7.1 through 
410.7.4. 

410.7.1 Occupancy Conditions HI and FV: Each 
sleeping area in Occupancy Conditions III and IV 
shall be separated from the adjacent common 
spaces by a smoke-tight partition where the travel 
distance from the dormitory room or cell through 
the common space to the exit access corridor 
exceeds 50 feet (15240 mm). 

410.7.2 Occupancy Condition V: Each sleeping 
area in Occupancy Condition V shall be separated 
from adjacent sleeping areas, corridors and 
common spaces by a smoke-tight partition. 
Additionally, common spaces shall be separated 
from the exit access corridor by a smoke-tight 
partition. 

410.7.3 Openings in room face: The aggregate 
area of all openings in a solid sleeping room face 
in Occupancy Conditions H, III, IV and V shall 
not exceed 120 square inches (77419 mm^). The 
aggregate area shall include all openings 
including door undercuts, food passes and grilles. 
All openings shall be not more than 36 inches 
(914 mm) above the floor. In Occupancy 
Condition V, the openings shall be closable from 
the room side. 

410.7.4 Smoke-tight doors: Doors in openings in 
partitions required to be smoke tight by 780 CMR 
410.7 shall be substantial doors, of construction 
that will resist the passage of smoke. Latches and 
door closers are not required on cell doors. 

410.8 Windowless buildings: For the purposes of 
780 CMR 410.8, a windowless building or portion of 
a building is one with nonopenable windows, 
windows not readily breakable or without windows. 
Windowless buildings shall be provided with vent 
openings, smoke shafts or an engineered smoke 
control system to provide ventilation (mechanical or 
natural) for each windowless smoke compartment. 

780 CMR 411.0 MOTION PICTURE 

PROJECTION ROOMS, SCREENING 

ROOMS AND SOUND STAGES 

(Refer to M.G.L c. 143, § 89 for additional 
information regarding cellulose nitrate film and 
Appendix A for related Code of Massachusetts 
Regulations fCMR'sJ). 



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SPECIAL USE AND OCCUPANCY 



411.1 General: The provisions of 780 CMR 4n.O 
shall apply to rooms in which ribbon-type cellulose 
acetate or other safety film is utilized in conjunction 
with electric arc, xenon or other light-source 
projection equipment which develops hazardous 
gases, dust or radiation. Where cellulose nitrate film 
is utilized or stored, such rooms shall comply with 
NFiPA 40 listed in Appendix A. 

Every motion picture machine projecting film as 
mentioned within the scope of 780 CMR 41 1.0 shall 
be enclosed in a projection room. Appurtenant 
electrical equipment, such as rheostats, transformers 
and generators, shall be within the projection room 
or in an adjacent room of equivalent construction. 
There shall be posted on the outside of each 
projection room aoor and within the projection room 
itself, a conspicuous sign with one-inch (25 mm) 
block letters stating "Safety Film Only Permitted in 
this Room". 

411.2 Construction of projection rooms: Every 
projection room shall be of permanent construction 
consistent with the construction requirements for the 
type of building in which the projection room is 
located. Openings are not required to be protected. 

The room shall have a floor area of not less than 
80 square feet (7.44 m^) for a single machine. Each 
motion picture projector, floodlight, spotlight or 
similar piece of equipment shall have a clear 
working space of not less than 30 inches by 30 
inches (762 mm by 762 mm) on each side and at the 
rear thereof, but only one such space shall be 
required between two adjacent projectors. The 
projection room and the rooms appurtenant thereto 
shall have a ceiling height of not less than seven feet 
six inches (2286 mm). The aggregate of openings 
for projection equipment shall not exceed 25% of the 
area of the wall between the projection room and the 
auditorium. All openings shall be provided with 
glass or other approved material, so as to close 
completely the opening. 

411.3 Projection booth and equipment 
ventilation: Projection booths and equipment shall 
be ventilated in accordance with the mechanical 
code listed in Appendix A. 

411.4 Lighting control: Provision shall be made for 
control of the auditorium lighting and the means of 
egre55 lighting systems of theaters fi"om inside of the 
room and fi-om at least one other convenient point in 
the building as required in 780 CMR 1024.3. 1 . 

411.5 Miscellaneous equipment: Each projection 
room shall be provided with rewind and film storage 
facilities. 

411.6 Screening rooms: Screening rooms shall 
provide a seating capacity of not more than 30 
persons, with not less than two approved means of 
egress complying with 780 CMR 10. Such rooms 



shall be enclosed in one-hour Jire separation 
assemblies. All seats shall be permanently fixed in 
position and the arrangement shall comply with the 
requirements of 780 CMR 1012.0. 

411.7 Sound stage construction: All sound stages 
for motion picture or television productions shall be 
equipped throughout with an automatic sprinkler 
system installed in accordance with 780 CMR 9. 

780 CMR 412.0 STAGES AND PLATFORMS 

412.1 Applicability: The provisions of 780 CMR 
412.0 shall apply to all parts of buildings and 
structures which contain stages or platforms and 
similar appurtenances as herein defined. 

412.2 Definitions: The following words and terms 
shall, for the purposes of 780 CMR 412.0 and as 
used elsewhere in 780 CMR, have the meanings 
shown herein. 

Platform: A platform is a raised area within a 
building for: the presentation of music, plays or 
other entertainment; the head table for special 
guests; the raised area for lectures and speakers; 
boxing and wrestling rings; theater-in-the-round; 
and similar purposes wherein there are no 
overhead hanging curtains, drops, scenery or 
stage effects other than lighting. A temporary 
platform is one installed for not more than 30 
days. 

Stage: A stage is a partially enclosed portion of a 
building which is designed or used for the 
presentation of plays, demonstrations or other 
entertainment. A stage shall be further classified 
as either a legitimate stage, regular stage or thrust 
stage. 

Stage, legitimate: A stage wherein curtains, 
drops, leg drops, scenery, lighting devices or other 
stage efifects are retractable horizontally or 
suspended overhead. 

Stage, regular: A stage wherein curtains, fixed 
leg drops, valances, scenery and other stage 
effects are hung and are not retractable. 
Stage, thrust: A platform extending beyond the 
proscenium arch and into the audience. 

412.3 Stages: Stage construction shall comply with 
780 CMR 412.3.1 through 412.3.9. 

412.3.1 Stage floor construction: Openings 
through all stage floors shall be equipped with 
tight-fitting, solid wood trap doors not less than 
two inches in nominal thickness with approved 
safety locks or other materials of equal physical 
and fire endurance properties. 

412.3.1.1 Legitimate stages: Legitimate Jto^es 
shall be constructed of materials as required for 
floors for the type of construction, but not less 
than Type IB construction except that the 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE M.\SSACHUSETTS STATE BUILDING CODE 



portion of the legitimate stage extending back 
from and six feet (1829 mm) beyond the flill 
width of the proscenium opening on each side 
shall be permitted to be constructed of 
noncombustible or heavy timber construction 
covered with a wood floor of not less than two 
inches nominal in thickness. Except for the 
finished floor, combustible construction shall 
not extend beyond the plane of the proscenium 
opening. 

412.3.1.2 Regular and thrust stages: Regular 
stages and thrast stages shall be constructed of 
materials as required for floors for the type of 
construction of the building in which such 
stages are located. 

412.3.2 Stage rigging loft: The rigging loft, also 
referred to as the loft or fly, is the space over the 
stage where scenery and equipment is out of view. 
The fly gallery is the narrow raised platform at the 
side of the legitimate stage from which the lines 
for flying scenery are manipulated. The gridiron 
is the arrangement of beams over a legitimate 
stage supporting the machinery for flying scenery 
and hanging battens from which lighting is hung. 
The pin rail is the beam at one side of a legitimate 
stage through which wooden or metal pins are 
driven and to which lines from the flies are 
fastened. The rigging loft, fly galleries, gridiron 
and pin rails shall be constructed of approved 
noncombustible materials. 

412.3.3 Footlights and stage electrical 
equipment: Footlights and border lights shall be 
installed in troughs constructed of approved 
noncombustible materials. Ready access shall be 
provided at all times to the switchboard. The 
storage or placing of stage equipment against the 
switchboard shall be prohibited. 

412.3.4 Exterior stage doors: Where protection 
of openings is required, exit discharge door 
openings to the outer air shall be protected with 
fre doors that comply with 780 CMR 716.0. All 
exterior openings which are located on the stage 
for means of egress or loading and unloading 
purposes, and which are likely to be open during 
occupancy of the theater, shall be constructed 
with vestibules to prevent air drafts into the 
auditorium. 

412.3.5 Proscenium wall: Legitimate stages shall 
be completely separated from the seating area by 
a proscenium wall with not less than a two-hour 
fireresistance rating extending continuously from 
the foundation to the roof There shall not be 
other openings in the wall separating a legitimate 
stage from the auditorium except: the main 
proscenium opening; two doorways at the stage 
level, one on each side thereof; and one doorway 
to the musician's pit from the space below the 
stage floor. Each such doorway shall not exceed 
45 square feet (4.19 m^) in area and shall be 



protected with fire doors that comply with 

780 CMR 716.0. 

412.3.5.1 Trim, finish and decorative 
hangings: All moldings and decorations 
around the proscenium opening shall be 
constructed entirely of approved 
noncombustible material. 

412.3.6 Proscenium curtain: The proscenium 
opening of every legitimate stage shall be provided 
with a curtain of approved material designed and 
installed to intercept hot gases, flames and smoke, 
and to prevent a glow from a severe fire on the stage 
from showing on the auditorium side for a period of 
30 minutes. The closing of the curtain from the full 
open position shall be effected in less than 30 
seconds, but the last eight feet of travel shall require 
not less than five seconds. 

412.3.6.1 Activation: The curtain shall be 
activated by rate-of-rise heat detection 
operating at a rate of temperature rise of 15 to 
20°F per minute (8° to 11 °C per minute); and 
by an auxiliary manual control. 

412.3.6.2 Fire test: A sample curtain with a 
minimum of two vertical seams shall be 
subjected to the standard fire test specified in 
ASTM E119 listed in Appendix A for a period 
of 30 minutes. The curtain shall overlap the 
fiimace edges by an amount that is appropriate 
to seal the top and sides. The curtain shall 
have a bottom pocket containing a minimum of 
four lbs. per linear foot (6 kg/m) of batten. The 
exposed surface of the curtain shall not glow, 
and flame or smoke shall not penetrate the 
curtain during the test period. Unexposed 
surface temperature and hose stream test 
requirements are not applicable to the 
proscenium fire safety curtain test. 

412.3.6.3 Smoke test: Curtain fabrics shall 
have a smoke-developed rating of 25 or less 
when tested in accordance with ASTM E84 
\\stedin Appendix A. 

4^12.3.6.4 Tests: The completed proscenium 

curtain shall be subjected to operating tests 
prior to the issuance of a certificate of 
occupancy. 

412.3.7 Scenery: All combustible materials used 
in sets and scenery shall be rendered flame- 
resistant to comply with 780 CMR 8. 

412.3.8 Stage ventilation: Emergency ventilation 
shall be provided for stages larger than 1,000 
square feet (93 m ) in floor area, or with a stage 
height greater than 50 feet (15240 mm). Such 
ventilation shall comply with 780 CMR 412.3.8.1 
or 412.3.8 2 

412.3.8.1 Roof vents: Two or more vents 
constructed to open automatically by approved 
heat-activated devices and with and aggregate 
clear opening area of not less than 5% of the 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



area of the stage shall be located near the 
center and above the highest part of the stage 
area, except as otherwise provided for in 
780 CMR 412.3.9. Supplemental means shall 
be provided for manual operation of the 
ventilator. Curbs shall be provided as required 
for skyUghts in 780 CMR 2608.2. 
412.3.8.2 Smoke control: Smoke control in 
accordance with 780 CMR 921.0 shall be 
provided to maintain the smoke layer interface 
not less than six feet (1829 mm) above the 
highest level of the assembly seating or above 
the top of the proscenium opening where a 
proscenium wall is required by 780 CMR 
412.3.5. 

412.3.9 Superimposed theaters: Additions or 
extensions shall not be erected over the stage 
section of a theater, nor shall a second theater be 
erected above another. Where approved, the 
prohibition against superimposed theaters and 
construction above the stage shall not apply 
where approved access is provided for fire 
fighting wath direct means of ventilation to the 
outer air fi-om the stage portion. 

412.4 Platforms: Platform construction shall 
comply with 780 CMR 412.4.1 and 412.4.2. 

412.4.1 Materials: In buildings required to be of 
Type 1 or Type 2 construction where the 
platforms are not more than 30 inches (762 mm) 
above the main floor level, the minimum type of 
construction for a permanent platform shall be 
Type 2C. For all types of construction where the 
platforms are not more than 30 inches (762 mm) 
above the main floor level, not larger in area than 
10% of the room floor area and not more than 200 
square feet (19 m2) in area, the minimum type of 
construction for a permanent platform shall be 
Type 5B. For all types of construction where the 
platforms are not more than 30 inches (762 mm) 
above the main floor level, not larger than Va of 
the room floor area and not more than 3,000 
square feet (279 m^) in area, the minimum type of 
construction for a permanent platform shall be 
Type 4 or the platform shall be constructed of 
fireretardant-treated wood. All other permanent 
platforms shall be constructed of approved 
materials as required for floors for the required 
type of construction of the building in which it is 
located. Temporary platforms shall be 
constructed of any approved material. 

412.4.2 Space beneath: The space between the 
floor and a tempoTary platform above shall not be 
utilized for any purpose other than electrical 
wiring to platform equipment. Where the space 
between the floor and a permanent platform above 
is utilized for any purpose other than electrical 
wiling or plumbing, the platform shall provide a 
one-hour fiireresistance rating. 



412.5 Dressing and appurtenant rooms: Dressing 
and appurtenant rooms shall comply with 780 CMR 
412.5.1 through 412.5.3. 

412.5.1 Construction: Dressing rooms, scene 
docks, property rooms, workshops, storerooms 
and all compartments appurtenant to the stage 
shall be separated fi-om each other and from the 
stage and all other parts of the building by fire 
separation assemblies with not less than a one- 
hour fireresistance rating with approved opening 
protectives. Such rooms shall not be placed 
immediately over or under the operating stage 
area. 

Exception: Separation from the stage is not 
required for stages having a floor area of 500 
square feet (46.5 m^) or less. 

412.5.2 Opening protectives: Openings other 
than to trunk rooms and the necessary doorways 
at stage level shall not connect such rooms with 
the stage, and such openings shall be protected 
vAthfre doors that comply with 780 CMR 716.0. 

412.5.3 Dressing room and stage exits: Each tier 
of dressing rooms shall be provided with at least 
two means of egress. Means of egress stairways 
from dressing and storage rooms are not required 
to be enclosed where located in the stage area 
behind the proscenium wall. At least one 
approved means of egress shall be provided from 
each side of the stage; from each side of the space 
under the stage; from each fly gallery; and from 
the gridiron. A steel ladder shall be provided 
from the gridiron to a scuttle in the stage roof 

412.6 Automatic sprinkler system: Stages and 
enclosed platforms shall be equipped with an 
automatic sprinkler system in accordance with 
780 CMR 412.0 and 780 CMR 906.0 or 780 CMR 
907.0. The system shall be installed: under the roof 
and gridiron, in the tie and fly galleries and in all 
places behind the proscenium wall of the stage; over 
and within enclosed platforms in excess of 500 
square feet (46.5 m^) in area; and in dressing rooms, 
lounges, workshops and storerooms accessory to 
such stages or enclosed platforms. 

Exceptions: 

1 . Stages or enclosed platforms open to the 
auditorium room on three or more sides. 

2. Altars, pulpits or similar platforms and 
accessory rooms. 

3. Stage gridirons where sidewall sprinklers with 
135°F (57°C) rated heads with heat-bafEle plates 
are installed around the perimeter of the stage 
except for the proscenium opening at points not 
more than 30 inches (762 mm) below the gridiron 
nor more than six inches (152 mm) below the 
baffle plate. 

4. Under stage or enclosed platform areas less 
than four feet (1219 mm) in clear height utilized 



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77 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



for storage, the stage and supporting structures 
shall be of one-hour fireresistance rated 
construction. 

412.7 Standplpes: A wet standpipe system in 
accordance with 780 CMR 914.0 shall be provided 
and equipped with IVi-inch hose connections on 
each side of the stage. 

Exception: Where the building or area is 
equipped throughout with an automatic sprinkler 
system, the hose connections that are supplied 
from the automatic sprinkler system shall have a 
water supply of not less than that required by 
NFiPA 13 listsd in Appendix A. 

412.7.1 Hose and cabinet: The hose connections 
shall be equipped with sufficient lengths of l'/2 - 
inch hose to provide fire protection for the stage 
area; such connections shall be equipped with an 
approved adjustable fog nozzle and be mounted in 
a cabinet or a rack. 

780 CMR 4D.0 SPECIAL AMUSEMENT 
BUILDINGS 

413.1 General: Special amusement buildings shall 
comply with the requirements for buildings of the 
appropriate assembly use group in addition to the 
requirements of 780 CMR 413.0. 

Exception: Buildings or portions thereof that are 
essentially open to the outside air, such as 
buildings without walls or without a roof and 
arranged to prevent the accumulation of smoke in 
the building or structure are not required to 
comply with 780 CMR 413.0. 

413.2 Special amusement building: A special 
amusement building is any temporary, permanent or 
mobile building or portion thereof which is occupied 
for amusement, entertainment or educational 
purposes and which contains a device or system 
which conveys passengers or provides a walkway 
along, around or over a course in any direction so 
arranged that the means of egress path is not readily 
apparent due to visual or audio distractions or is 
intentionally confounded or is not readUy available 
due to the nature of the attraction or mode of 
conveyance through the building or structure. 

413.3 Fire detection: All special amusement 
buildings shall be equipped with an automatic fire 
detection system in accordance with 780 CMR 
918.0. 

Exception: In areas where the ambient conditions 
will cause a smoke detector to activate, an 
approved alternative type of automatic detector 
shall be installed. 

413.4 Automatic sprinklers: AU special amusement 
buildings shall be equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.0. Where the special amusement 
building is temporary or mobile, the sprinkler water 
supply shall be of an approved temporary means. 



Exception: An automatic sprinkler system is not 
required where the total floor area of a temporary 
special amusement building is less than 1,000 
square feet (93 m^) and the travel distance from 
any point to an exit is less than 50 feet (15240 
mm). 

413.5 System response: The activation of the 
automatic fire detection system within a single 
protected area or the automatic sprinkler system 
shall automatically: 

1 . Cause illumination of the means of egress 
with light of not less than one footcandle (10.76 
lux) at the walking surface level; 

2. Stop any conflicting or confusing sounds and 
visual distractions; and 

3 . Activate an approved direcfional exit marking 
that will become apparent in an emergency. 

413.5.1 Alarm: Activation of any single smoke 
detector, the automatic sprinkler system or any 
other automatic fire detection device shall 
irmnediately sound an alarm at the building at a 
constantly attended location from which 
emergency action can be initiated including the 
capability of manual initiation of requirements in 
780 CMR 413.5. 

413.5.2 Public address system: A public address 
system, which is also permitted to serve as an 
alarm system, shall be provided and shall be 
audible throughout the entire special amusement 
building. 

413.5.3 Exit marking: "Exit" signs shall be 
installed at required exit doorways. Approved 
directional exit markings shall also be provided 
and shall include signs as required by 780 CMR 
1023.0. Where mirrors, mazes or other designs 
are used that confound the means of egress paths, 
approved low-level "exit" signs and directional 
path markings shall be provided and located not 
more than eight inches (203 mm) above the 
walking surface and on or near the means of 
egress path. Such markings shall become visible 
when activated in accordance with 780 CMR 
413.5, item 3. 

413.6 Interior finish: The interior finish shall be 
Class I in accordance with 780 CMR 803.2. 

413.7 Required inspections. Buildings or portions 
thereof, classified as special amusement buildings 
shall be inspected on an annual basis to ensure 
compliance with the applicable portions of 
780 CMR. 

780 CMR 414.0 AIRPORT TRAFFIC 
CONTROL TOWERS 

414.1 General: The provisions of 780 CMR 414.0 
shall apply to airport traffic control towers not 
exceeding 1,500 square feet per floor occupied only 
for air traffic control, electrical and mechanical 
equipment rooms, radar and electronics rooms. 



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780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



office spaces incidental to tower operation and 
lounges for employees, including restrooms. 

414.2 Type of construction: Air traffic control 
towers shall be constructed to conform to the height 
and area limitations of Table 414.2. 

Table 414.2 
HEIGHT AND AREA LIMITATIONS FOR 
AIRPORT TRAFFIC CONTROL TOWERS 



Type of 
construction 


Height'^^ 


Maximum area 
(square feet) 


lA, IB 

2A 
2B 

2£ 


Unlimited 
240 feet 
iOOfeet 
85 feet 


1,500 
1,500 
1,500 
1.500 



Note a. Height to be measured from grade to cab 

floor. 2 

Note b. 1 foot - 304.8 mm; 1 square food = 0.093m . 

414.3 Egress: A minimum of one exit stairway shall 
be permitted for airport traffic control towers of any 
height provided that the occupant load per floor does 
not exceed 15. The stairway shall conform to the 
requirements of 780 CMR 1014.0 and 1015.0. The 
stairway shall be separated from elevators by a 
minimum distance of Vi of the diagonal of the area 
served. 

Exception: Smokeproof enclosures as set forth in 
780 CMR 1015.0 are not required where required 
stairways are pressurized to a minimum of 0.15 
inch of water colimin (37.33 P) and a maximum of 
0.35 inch of water column (87.10 P) in the shaft 
relative to the building with all stairway doors 
closed. 

414.4 Automatic fire detection systems: Airport 
traffic control towers shall be provided with an 
automatic fire detection system installed in 
accordance with 780 CMR 918.0. 

414.5 Standby power: A standby power system that 
conforms to 780 CMR 403.9 and 527 CMR 12.00 as 
listed in Appendix A shall be provided in airport 
traffic control towers more than 65 feet (19812 mm) 
in height. Power shall be provided to mechanical 
equipment servicing smokeproof enclosures and 
stairway pressurization systems, means of egress 
lighting, elevator operational equipment and the 
automatic fire detection system. 

780 CMR 415.0 OUTDOOR PROCESSING 
FACIUnES 

415.1 Industry standards: Outdoor processing 
facilities such as chemical plants, refineries and 
grain elevators shall be constructed in accordance 
with the accepted engineering practice of the 
specific industry and the fire prevention code listed 
in Appendix A, subject to the approval of the the 
' building code enforcement official and the fire 
prevention officer. 



780 CMR 416.0 HPM FACBLmES 

416.1 Scope: The provisions of 780 CMR 416.0 
shall apply to buildings and structures using 
hazardous production materials {HPM), such as in 
semiconductor fabrication facilities and areas of 
comparable research and development. Except as 
specifically required by 780 CMR 416.0, such 
buildings shall comply with the applicable 
requirements of 780 CMR. The specific code 
provisions of 780 CMR 307.0, 506.3 and Table 
1009.2 applicable to high-hazard use groups shall 
not apply unless stated herein. 

416.2 Deflnitions: The following words and terms 
shall, for the purposes of 780 CMR 416.0 and as 
used elsewhere in 780 CMR, have the meanings 
shown herein. 

Emergency control station: An approved location on 
the premises where signals from emergency 
equipment are received and which is staffed by 
trained personnel. 

Fabrication area: A fabrication area is one in which 
there are processes involving hazardous 
production materials {HPM), and includes 
ancillary rooms or areas, such as dressing rooms 
and offices, which are supplemental to the area 
processes. 

Hazardous production material (HPM): A solid, 
liquid or gas that has a degree of hazard rating in 
health, flammability or reactivity of Class 3 or 4 
as ranked by NFiPA 704 listed in Appendix A and 
which is used directly in research, laboratory or 
production processes which have as their end 
product, materials which are not hazardous. 

Service passage, HPM: A passage in which 
hazardous production materials {HPM) are 
transported from & separate inside HPM storage 
room or the exterior of the building to the 
perimeter wall of the fabrication area, for 
purposes other than required means of egress. 

Storage room, HPM, separate inside: A room in 
which hazardous production materials {HPM) are 
stored in containers, tanks, drums or other means, 
and which is separated from other occupancies. 
Such rooms include: 

HPM cutoff room: An HPM storage room within 
a building and having at least one exterior wall. 
HPM inside room: An HPM storage room totally 
enclosed within a building and not having exterior 
walls. 

416.3 Allowable heights, stories and area: The 

allowable height, number of stories and basic areas 
permitted for HPM buildings and structures shall not 
exceed the limitations specified in Table 416.3. The 
provisions of 780 CMR 507 shall not apply. The 



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79 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



area limitations are for one- or two-story buildings 
facing on a street or public space not less than 30 
feet (9144 mm) wide. The increases permitted in 
780 CMR 506.2 and 506.3 shall apply. 

Table 4163 
HEIGHT, NUMBER OF STORIES AND 
AREA LIMITATIONS FOR HPM USE 

FACiLrrrES 



Type of 
constniction 


Number of 
stories 


Height (feetf 


Area (square 
feet/floor)^ 


lAand IB 


3 


55 


Unlimited 


2A 


3 


55 


34,200 


2B 


3 


55 


22,500 


2C 


3 


40 


14,400 


3A 


3 


50 


19,800 


38 


3 


40 


14,400 


4 


3 


55 


21,600 


5A 


3 


40 


15,300 


.. .53 , 


2 


30 


7,200 



416.4 Fire suppression: HPM facilities shall be 
equipped throughout with an automatic sprinkler 
system in accordance with 780 CMR 9. The design 
for ih& fabrication areas, service passages, separate 
inside HPM storage rooms without dispensing, and 
means of egress corridors shall meet the 
requirements for Ordinary Hazard Group 2 in 
NFiPA 13 listed in Appendix A. The design for 
separate inside HPM storage rooms with dispensing 
shall meet the requirements for Extra Hazard Group 
2 in NFiPA 13 listed in Appendix A. 

416.5 Amount of HPM in a fabrication area: The 

total amotmt of HPM permitted Ln a single 
fabrication area shall be based on the densities in 
Table 416.5(2), or the quantities in Table 416.5(1), 
whichever is the larger amount. 



Table 416.5(1) 
PERMITTED AMOUNTS OF HPM IN A 

SINGLE FABRICATION AREA- 
QUANTITY BASIS 



Material 



Maximum quantity 



Flammable liquids 

Class I-A 

Class I-B 

Class I-C 
Combination flammable liquids 

containing not more than the exempt 

amounts of Class I-A, I-B or I-C 

flammable liquids 
Combustible liquids 

Class II 

Class III-A 
Flammable gases 



Liquefied flammable gases 

Flammable solids 

Corrosive liquids 

Oxidizing material - gases 

Oxidizing material - liquids 

Oxidizing material - solids 

Organic peroxides 

Highly toxic material and poisonous gas 



90 gallons 
180 gallons 
270 gallons 



360 gallons 

360 gallons 

750 gallons 

9,000 cubic feet at 

one atmosphere of 

pressure at 70 °F 

180 gallons 

1 ,500 pounds 

165 gallons 

18,000 cubic feet 

150 gallons 

1,500 pounds 

30 pounds 

Included in the 

aggregate for 

flammables as noted 

above 



Note a. 1 gallon - 0.00379 m^; 1 cubic foot = 0.028 m ; 
1 pound = 0.454 kg; degrees C = {(degrees F)-32}/1.8, 



Table 416.5(2) 
PERMITTED AMOUNTS OF HPM IN A 



SINGLE FABRICATION AREA- 
BASIS ^' "" 


-DENSITY 


State 


Units'* 


Flam- 
mable 


Oxi- 
dizer 


Cor- 
rosive 


Solid 

Liquid 

Gas 


Pounds per aquare foot 
Gallons per square foot 
Cubic feet oer souare foot 


0.001 
0.04*' 
1.250 


0.003 

0.03 

1.250 


0.003 

0.08 

3.000 



Note a. HPM within piping shall not be included in the 

calculated quantities. 

Note b. The maximum permitted quantities of flammable 

and combustible liquids shall not exceed the following 

quantities: 

Class (I-A) + (I-B) + (I - C) (combination 

flammable liquids) = .025 

However Class I-A shall not exceed = .0025 

Class II = .01 

Class IIl-A = .02 

Note c. Highly toxic materials and poisonous gases 
shall be limited by the maximum quantities specified in 
Table 416.5(1). 

Note d. One pound per square foot = 4.882 kg/m ; 1 
gallon per square foot = 0.0407 m /m'; 1 cubic foot per 
square foot = 0.301 m^/m^. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECL^lL use AND OCCUPANCY 



416.6 Egress: There shall not be less than two 
means of egress provided for any fabrication area or 
any /fPM facility subdivision thereof larger than 200 
square feet (18.62 m^). The maximum length of ex/7 
access travel in HPM facilities shall be 100 feet 
(30480 mm). 

416.7 Separation: Fabrication areas shall be 
separated from each other, from means of egress 
corridors, and from other parts of the building by 
not less than one-hour ^re separation assemblies in 
compliance with 780 CMR 709.0, with_^re doors 
complying with 780 CMR 716.0. Floors forming 
part of the required separation shall be liquid tight. 

416.8 Floors: Floors vAxhin fabrication areas shall 
be of approved noncombustible construction. 
Unprotected openings through floors of fabrication 
areas are permitted where the interconnected levels 
are used solely for mechanical equipment directly 
related to such fabrication areas. 

Mechanical, duct and piping penetrations within 
a fabrication area shall not extend through more 
than two floors. Penetrations shall be effectively 
firestopped in accordance with 780 CMR 720.6.4 at 
the floor level. Ihs fabrication area, including the 
areas through which ductwork and piping extend, 
shall be considered a single conditioned space or^re 
area. 

416.9 Ventilation, general: Ventilation systems 
shall comply with the mechanical code listed in 
Appendix A except as otherwise provided herein. 
Ventilation, including recalculated air, shall be 
provided throughout ihs fabrication area at the rate 
of not less than Icfin per square foot (5074 
cmVs/m"') of floor area. 

416.9.1 Interconnection: The exhaust system of 
one fabrication area shall not connect to another 
exhaust system outside that fabrication area 
within the building. The return air system from 
one fabrication area shall not connect to any 
other system. 

416.9.2 Smoke detectors: Smoke detectors shall 
be installed in the recirculating air stream and 
shall initiate a signal at the emergency control 
station. 

416.93 Shutoff switches: Automatic shutoffs are 
not required to be installed on air-moving 
equipment. A manually operated remote switch 
to shut off the fabrication area supply or the 
recirculation air system, or both, shall be provided 
at an approved location outside Hoe fabrication 
area. 

416.9.4 Gas detection: Where HPM gas is used 
or dispensed and the physiological warning 
properties for the gas are at a higher level than the 
accepted permissible exposure limitation for the 
gas, a continuous gas-monitoring system shall be 



provided to detect the presence of a short-term 
hazard condition. Where dispensing occurs and 
flammable gases or vapors are liberated in 
quantities exceeding 20% of the lower explosive 
limitation, a continuous gas-monitoring system 
shall be provided. The monitoring system shall 
be connected to the emergency control station. 

416.10 Transporting HPM: HPM shall be 
transported io fabrication areas through enclosed 
piping or tubing systems which comply with 
780 CMR 416.15, through service passages, or in 
means of egress corridors as permitted in the 
exception to 780 CMR 416.12. 

416.11 Electrical: Electrical equipment and devices 
within the fabrication area shall comply with 
527 CMR listed \n Appendix A. The requirements 
for hazardous locations are not required to be 
applied where the average rate of air change is at 
least four cfin per square foot (20300 cmVs/m^) of 
floor area and where the rate of air change at any 
location is not less than three cfin per square foot 
(15200 cmVs/m-). 

416.12 Means of egress corridors: Means of egress 
corridors shall comply with 780 CMR 101 1.4 and 
shall be separated from fabrication areas as 
specified in 780 CMR 416.7. Means of egress 
corridors shall not be used for transporting HPM 
except as provided for in 780 CMR 416.12.1 and 
416.15.2. 

416.12.1 Existing facilities: In existing HPM 
facilities, when there are alterations or 
modifications to zyixsimg fabrication areas, the 
transportation of HPM in means of egress 
corridors shall be permitted provided that all of 
the requirements of 780 CMR 416.12.1.1 and 
416.12.1.2 are met. 

416.12.1.1 Corridors: Corridors adjacent to 
the fabrication area under alteration shall 
comply with Table 602, item 4, for a length 
determined as follows: 

1 . The length of the common wall of the 
corridor and ^al fabrication area; and 

2. For the distance along the corridor to 
the point of entry of HPM into the corridor 
serving thatfabrication area. 

416.12.1.2 Openings: There shall not be 
openings between the corridor and an HPM 
storage cabinet in a fabrication area other than 
those in compliance with all of the following: 

1. one-hour fire doors are installed 
between the corridor and the cabinet; 

2. The cabinet is separated from the 
corridor with a one-hour fireresistance rated 
fire partition; and 

3. Automatic sprinklers shall be provided 
inside the cabinets 



12/12/97 (Effective 8/28/97^ 



780 CMR -Sixth Edition 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



416.13 Service passages: Service passages shall be 
considered as //PA/ facilities. Service passages shall 
be separated from means of egress corridors as 
required by 780 CMR 416.7. 

416.13.1 Ventilation: Service passages shall be 
ventilated as reqmred by 780 CMR 416.9. 

416.13.2 Egress: There shall not be less than two 
means of egress from a service passage. Not 
more than one-half of the required means of 
egress shall be into the fabrication area. Doors 
from service passages shall be self-closing and 
swing in the direction of means of egress travel. 

416.13J Travel distance: The maximum distance 
of travel from any point in a service passage to an 
exit or door into a fabrication area shall not 
exceed 75 feet (22860 mm). Dead ends shall not 
exceed four feet (1219 mm) in length. 

416.13.4 Alarms: Alarms shall be provided for in 
accordance witii 780 CMR 416.14.5. 

416.14 Storage of HPM, general: Rooms used for 
the storage of HPM in quantities greater than those 
set forth in Tables 307.8(1) and 307.8(2), except for 
those quantities permitted within ^fabrication area, 
shall comply with the provisions of NFiPA 30 listed 
in Appendix A, provided that the area of an HPM 
cutoff room shall not exceed 6,000 square feet (558 
m'^). The storage area for any liquid HPM shall be 
provided with drains. 

416.14.1 Location within building: Where HPM 
cutoff rooms are provided, such rooms shall not 
be less than 30 feet (9144 mm) from lot lines. 

416.14.2 HPM drainage systems: Drainage 
systems shall be provided to direct liquid leakage 
and fire protection water to a safe location away 
from the building, important valves or adjoining 
property. HPM flammable liquid drains shall be 
separated from other HPM liquid drains Other 
HPM liquids in drains that are not compatible 
shall be separated from each other, provided that 
the liquids are permitted to be combined when 
such liquids have been rendered acceptable for 
discharge by an approved means into the public 
sewers. 

416.14.3 Egress: There shall be two means of 
egress from a separate inside HPM storage room 
where the room exceeds 200 square feet (1 86 m^) 
in area. Where two means of egress are required 
from HPM cutoff rooms, one shall be directly to 
the outside of the building. All storage room 
means of egress doors shall be self-closing and 
swing in the direction of means of egress travel 

416.14.4 Ventilation: Exhaust ventilation shall be 
provided for in accordance with 780 CMR 416.9 
for all categories of HPM. 

416.14.5 Emergency alarm: An emergency 
telephone system or local fire protective signaling 



system station shall be installed outside of each 
interior egress door from HPM cutoff rooms. The 
signal shall be relayed to the emergency control 
station and a local signaling device provided. 

416.14.6 Electrical: HPM cutoff rooms 
containing flammable liquids or gases shall be 
classified as Class I, Division 1, hazardous 
locations in accordance with 527 CMR listed in 
Appendix A. 

416.14.7 Gas detection: Gas detection shall be 
provided for in accordance with 780 CMR 
416.9.4. 

416.15 Piping and tubing: //PM piping and tubing 
shall comply with 780 CMR 416.15 and shall be 
installed in accordance with ASME B3 1 .3 listed in 
Appendix A. 

416.15.1 General: Piping and tubing systems 
shall be metallic unless the material being 
transported is incompatible with such system. 
Systems supplying gaseous HPM, having a health 
hazard of 3 or 4 as ranked by NFiPA 704 listed in 
Appendix A, shall be welded throughout, except 
for connections, valves and fittings which are 
within an exhausted enclosure. HPM supply 
piping or tubing in service passages shall be 
exposed to view. 

416.15.2 Installation in egress corridors or 
above other use groups: HPM shall not be 
located within means of egress corridors or above 
areas not containing HPM facilities except as 
permitted by 780 CMR 416.15. HPM piping and 
tubing shall be permitted within the space defmed 
by the walls of means of egress corridors and the 
floor or roof above, or in concealed spaces above 
other use groups imder the following conditions: 

1. Automatic sprinklers shall be installed 
within the space unless the space is less than 
six inches (152 mm) in least dimension. 

2. Ventilation at not less than six air changes 
per hour shall be provided. The space shall not 
be used to convey air from any other area. 

3. All HPM supply piping and tubing and 
HPM non-metallic waste lines shall be 
separated from the means of egress corridor 
and from any use group other than an HPM use 
facility by afire separation assembly having a 
fireresistance rating of not less than one hour. 
Where gypsum wallboard is used, joints on the 
piping side of the enclosure are not required to 
be taped, provided that the joints occur over 
framing members. 

4. Where piping or tubing is used to transport 
HPM liquids, a receptor shall be installed 
below such piping or tubing. The receptor 
shall be designed to collect and drain any 
discharge or leakage to an approved location. 
The one-hour enclosure required by 780 CMR 



780 CMR -Sixth Edition 



1 2/1 2/97 rFffecti ve 8/28/97^ 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECL\L USE AND OCCUPANCY 



416.15.2, item 3 shall not be used as part of the 
receptor. 

5. Manual or automatic remotely activated 
fail-safe emergency shutoff valves, with ready 
access thereto, shall be installed on piping and 
tubing, other than waste lines, at branch 
connections into ihe fabrication area, and at 
entries into means of egress corridors. 

6. Where HPM supply gas is carried in 
pressurized piping, a fail-safe system for 
excess flow control shall shut off flow due to a 
rupture in the piping. 

7 Electrical wiring and equipment located in 
the piping space shall be approved for Class I, 
Division 2, hazardous locations in accordance 
with 527 CMR listed in Appendix A. 
8. Gas detection shall be as provided for in 
780 CMR 416.9.4 

Exception: Conditions 1 through 8 shall not 
apply to transverse crossings of the 
corridors by supply piping that is coaxially 
enclosed within a ferrous pipe or tube for 
the width of the corridor. An enclosing 
pipie or tube open to an HPM use facility is 
permitted. 

416.15.3 Identiflcation: Piping, tubing and HPM 
waste lines shall be identified in accordance with 
ASME A 1 3 . 1 listed in Appendix A . 

780 CMR 417.0 HAZARDOUS MATERIALS 
(See also 780 CMR 426.0 for the design and 
constriction of Bulk Merchandising Retail 
Buildings.) 

417.1 General: The provisions of 780 CMR 417.0 
shall apply to all buildings and structures occupied 
for the manufacturing, processing, dispensing, use or 
storage of hazardous materials. All buildings and 
structures with an occupancy in Use Group H shall 
also comply with the applicable provisions of 
780 CMR 418.0 and the fire prevention code listed 
in Appendix A. 

Note: The safe design of hazardous material 
occupancies is material dependent. Individual 
material requirements are also found in 780 CMR 
307.0 and 418.0, and in the mechanical and fire 
prevention codes listed in Appendix A . Since the 
fire department is responsible for inspection of 
these occupancies for proper utilization and 
handling of hazardous materials, the 
administrative authority shall cooperate with the 
fire department in the discharge of the 
responsibility to enforce 780 CMR 417.0 

417.2 Control areas/exempt amounts: Control 
areas shall be those spaces within a building where 
quantities of hazardous materials not exceeding the 
allowable exempt amounts are stored, dispensed, 
utilized or handled. Control areas shall be separated 
from ail adjacent interior spaces hy fire separation 
assemblies in accordance with 780 CMR 709.0. The 



number of permitted control areas and degree of fire 
separation shall be in accordance with Table 417.2. 
The floor construction and supporting structure for 
all floors within the control area shall require a 
minimum two-hour fireresistance rating. 



Table 417.2 
PERMITTED CONTROL AREAS 



a, b 



Floor level 


Percent of 

allowable 

exempt 

quantities per 

control area 


Control areas 
per floor 


Vertical fire 

separation 

walls (hours) 


1 
2 
3 


100 

75 
50 


4 
3 
2 


1 

1 
1 


4 
5 
6 


12.5 
12.5 
12.5 


2 
2 
2 


2 
2 
2 


7-9 
Higher than 9 


5 
5 


2 

I 


2 
2 



Note a. The number of floor levels below grade shall 
not exceed two. The first floor level before grade shall be 
limited to 75% of the maximum allowable exempt 
quantity per control area with a maximum of three 
control areas. The second floor level below grade shall 
be limited to 50% of the maximum allowable exempt 
quantity per control area with a maximum of two control 
areas. 

Note b. In mercantile occupancies, a maximum of two 
control areas per floor shall be permitted in retail sales 
rooms. 

417.2.1 Hazardous material in mercantile 
display areas: Except as modified by 780 CMR 
426, the aggregate quantity of nonflammable solid 
and nonflammable or noncombustibie liquid 
hazardous materials permitted within a single 
control area of a retail sales occupancy is 
permitted to exceed the exempt amounts specified 
in Tables 307.8(1) and 307.8(2) without 
classifying the building as a high-hazard use 
group, provided that the materials are stored in 
accordance with the fire prevention code listed in 
Appendix A. 

417.3 Equipment rooms: Heating and ventilating 
equipment in occupancies involving fire hazards 
&om flammable vapors, dusts, combustible fibers or 
other highly combustible substances shall be 
installed and protected against fire and explosion 
hazards in accordance with the mechanical code and 
the fire prevention code listed in Appendix A. 

417.4 Hazardous material systems: Systems 
involving hazardous materials shall be suitable for 
the intended application and shall be designed by 
persons competent in such design. Controls shall be 
designed to prevent materials fi"om entering or 
leaving process or reaction systems at other than the 
intended time, rate or path. Automatic controls, 
where provided, shall be designed to be fail safe. 



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83 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



417.5 Inside storage, dispensing and utilization: 

The inside storage, dispensing and utilization of 
hazardous materials in excess of the allowable 
exempt amounts of Tables 307.8(1) and 307.8(2) 
shall be in accordance with 780 CMR 417.5.1 
through 417.5.5 and the fire prevention code listed 
in Appendix A. 

417.5.1 Explosion control; Every structure, room 
or space occupied for purposes involving 
explosion hazards shall be provided with 
explosion venting, explosion suppression systems, 
barricades or equivalent explosion protective 
devices in accordance with 780 CMR 417.0 and 
NFiPA 495 listed in Appendix A where required 
by 780 CMR 418.0 and the fire prevention code 
listed in Appendix A. 

Exception: Explosion venting shall not be 
utilized as a means to protect buildings from 
detonation hazards. 

417.5.1.1 Explosion venting: Areas which are 
provided with explosion venting to relieve 
deflagration shall comply with the following; 

1. Walls, ceilings and roofs exposing 
surrounding areas shall be designed to resist 
a minimum internal pressure of 100 pounds 
per square foot (psf). 

2. Explosion venting shall be permitted 
only in exterior walls or roofs or through 
specially designed shafts to the exterior of 
the building. 

3. Venting shall be designed to prevent 
serious structural damage and the 
production of lethal projectiles. 

4. The aggregate clear vent relief area shall 
be governed by the pressure resistance of 
the nonrelieving portions of the building. 

5. Vents shall be designed to relieve at a 
maximum internal pressure of 20 pounds 
per square foot (psf) and shall consist of any 
one or any combination of the following; 

5.1. Walls of lightweight material. 

5.2. Lightly fastened hatch covers. 

5.3. Lightly fastened, outward-opening 
swinging doors in exterior walls. 

5.4. Lightly fastened walls or roofs. 

6. Venting devices shall discharge directly 
to the open air or to an unoccupied space 
not less than 50 feet in width on the same 
lot. 

7. Relieving devices shall be so located 
that the discharge shall not be less than ten 
feet vertically and 20 feet horizontally from 
window openings or exits in the same or 
adjoining buildings or structures. 

8. Discharge shall be in the direction of 
least exposure and not into the interior of 
the building. 

417.S.1.2 Explosion suppression systems; 
Explosion suppression systems shall be of an 
approved type and installed in accordance with 



the provisions of 780 CMR and NFiPA 69 
listed \n Appendix A. 

417.5.2 Monitor control equipment; Monitor 
control equipment shall be provided where 
required by the fire prevention code listed in 
Appendix A 

417.5.3 Detection systems; All occupancies in 
Use Group H shall be provided with an automatic 
fire detection system in accordance with NFiPA 
72 listed in Appendix A where required by the fire 
prevention code listed in Appendix A. The 
detection system shall be provided in the areas 
where the high-hazard materials are utilized and 
stored. 

417.5.4 Standby power; ,Where mechanical 
ventilation, treatment systems, temperature 
control, alarm, detection or other electrically 
operated systems are required, such systems shall 
be connected to an emergency electrical system in 
accordance with 527 CMR 12.00 as listed in 
Appendix A or a. standby power system in 
accordance with 527 CMR 12.00 as listed in 
Appendix A. Such systems shall be independent 
of the public supply. 

417.5.5 Spill control, drainage and 
containment; Rooms, buildings or areas occupied 
for the storage of solid and liquid hazardous 
materials shall be provided with a means to 
control spillage and to contain or drain off 
spillage and fire protection water discharged in 
the storage area where required in 780 CMR 
418.0 and the fire prevention code listed in 
Appeni^A. 

417.6 Outside storage, dispensing and utilization: 

The outside storage, dispensing and utilization of 
hazardous materials in excess of the exempt 
amounts shall be in accordance with 780 CMR 
417.6.1 through 417.6.6 and the fire prevention code 
listed in Appendix A. 

417.6.1 Location: In addition to the general 
requirements of 780 CMR 417.6.2 through 
417.6.5, the outside storage of hazardous 
materials as listed in 780 CMR 307.0 shall be 
separated from buildings and lot lines and into 
individual areas as specified in the fire prevention 
code listed in Appendix A. 

4X1.6.1 Protection from vehicles; Guard posts or 
other means shall be provided to protect outside 
storage tanks from vehicular damage. 

417.6.3 Fire lanes and water supply: Fire lanes 
and approved water supplies shall be provided for 
outside storage areas as required by the code 
official. 

1 . Fire lanes. Fire lanes shall be provided to 
within 150 feet (45720 mm) of all portions of 
an outside storage area. Such fire lanes shall 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



comply with the provisions of the fire 
prevention code listed in Appendix A 
2. Water supply. An approved water supply 
shall be provided. Fire hydrants capable of 
supplying the required fire flow shall be 
provided to within 150 feet (45720 mm) of an 
outside storage area. The water supply and fire 
hydrants shall comply with the provisions of 
NFiPA 24 and the fire prevention code listed in 
Appendix A. 

417.6.4 Weather protection: Where weather 
protection is provided for sheltering outside 
hazardous material storage areas, such storage 
shall not be considered inside storage provided 
that all of the following conditions are met: 

1. Structure supports and walls shall not 
obstruct more than one side of the perimeter of 
the storage area. 

2. The distance fi"om the structure and the 
structure supports to buildings, lot lines, public 
ways or means of egress to ^public way shall 
not be less than the distance required for an 
outside hazardous material storage area 
without weather protection. 

3. The overhead structure shall be of 
approved noncombustible construction with a 
maximum area of 1,500 square feet (140 m^). 

417.6.5 Security: Any site occupied for the 
storage, utilization or handling of hazardous 
materials shall be provided with a fence not less 
than sbc feet (1829 mm) in height or otherwise 
secured fi^om public access. 

417.6.6 Fire suppression system: Areas occupied 
for the dispensing or utilization of flammable 
hazardous materials which are located within 50 
feet of either a storage area or building, and 
vehicle-loading racks where flammable hazardous 
materials are dispensed, shall be equipped with an 
approved automatic fire suppression system 

Exception: Motor vehicle service stations as 
defined in NFiPA 30A listed in Appendix A 

780 CMR 418.0 USE GROUPS H-1, H-2, H-3 
ANDH-4 

418.1 Scope: The provisions of 780 CMR 418.0 
shall apply to the storage and utilization of 
hazardous materials in excess of the exempt 
amounts listed in 780 CMR 3 07. 8 . All buildings and 
structures with an occupancy in Use Group H shall 
also comply with the applicable provisions of 
780 CMR 417.0 and the fire prevention code listed 
m Appendix A. 

418.2 Use Group H-1: All occupancies in Use 
Group H-1 shall be constructed in accordance with 
the provisions of 780 CMR 418.2.1 and 418.2.2 and 
the fire prevention code listed in Appendix A 



418.2.1 Construction: Occupancies in Use Group 
H-1 shall not be located in buildings that are more 
than one story in height, have basements or other 
spaces below grade, or which are attached to other 
buildings. The minimum^re separation distance 
for all exterior walls of occupancies in Use Group 
H-1 shall be in accordance with the fire 
prevention code listed in Appendix A All floor 
surfaces shall be spark resistant. 

418.2.2 Number of exits: There shall not be less 
than two exits from any area or space wherein Use 
Group H-1 materials are utilized or stored All 
required exits shall discharge directly to the 
exterior of the building or structure. 

418.3 Use Group H-2: Occupancies in Use Group 
H-2 shall be constructed in accordance with 
780 CMR 418.3.1 through 418.3.4 and the fire 
prevention code listed in Appendix A. 

418.3.1 Combustible dusts, grain processing 
and storage: The provisions of 780 CMR 
418.3.1.1 through 418.3.1 6 shall apply to all 
buildings in which materials that produce 
combustible dusts are stored or handled 
Buildings which store or handle combustible dusts 
shall comply with the applicable provisions of 
NFiPA 61A, 61B, 61C, 61D. 65, 120, 651, 654, 
655, 664 and 8503 and the fire prevention code 
listed in Appendix A. 

418.3.1.1 Type of construction and height 
exceptions: AH buildings shall be of Type 1, 
Type 2 or Type 4 construction, within the 
height and area limitations of Table 503 for 
Use Group H-2; except that where erected of 
Type 1 or Type 2 construction, the heights and 
areas of grain elevators and similar structures 
shall be unlimited, and where of Type 4 
construction, the maximum height shall be 65 
feet (19812 mm) and except further that, in 
isolated areas, the maximum height of Type 4 
structures shall be increased to 85 feet (25908 
mm). 

418.3.1.2 Grinding rooms: Every room or 
space occupied for grinding or other operations 
that produce combustible dusts shall be 
enclosed with floors and walls that have not 
less than a two-hour fireresistance rating where 
the area is not more than 3,000 square feet (279 
m^, and not less than a four hour fireresistance 
rating where the area is greater than 3.000 
square feet (279 m^. 

418.3.1.3 Conveyors: All conveyors, chutes, 
piping and similar equipment passing through 
the enclosures of rooms or spaces shall be 
constructed dirt tight and vapor tight, and be of 
approved noncombustible materials complying 
with 780 CMR 3010.0. 

418.3.1.4 Explosion relief: Means for 
explosion relief shall be provided as specified 



2/7/97 (Effective 2/28/97) 



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85 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



in 780 CMR 417.5.1, or spaces shall be 
equipped with the equivalent mechanical 
ventilation complying with the mechanical 
code listed in Appendix A. 

418.3.1.5 Grain elevators: Grain elevators, 
malt houses and buildings for similar 
occupancies shall not be located within 30 feet 
(9144 mm) of interior lot lines or structures on 
the same lot, except where erected along a 
railroad right-of-way 

418.3.1.6 Coal pockets: Coal pockets located 
less than 30 feet (9144 nun) from interior lot 
lines or from structures on the same lot shall be 
constructed of not less than Type 2A 
construction. Where more than 30 feet (9144 
mm) from interior lot lines, or where erected 
along a raiboad right-of-way, the minimum 
type of construction of such structures not 
more than 65 feet (19812 mm) in height shall 
be Type 4 

418.3.2 Flammable and combustible liquids: 

The storage, handling processing and transporting 
of flammable and combustible liquids shall be in 
accordance with the mechanical code and the fire 
prevention code listed in Appendix A. Where a 
Class I, n or fSAflammable or combustible liquid 
is stored in tanks inside the building, the 
installation shall conform to 780 CMR 418.3.2.1 
through 418.3.2.10 and NFiPA 30 listed in 
Appendix A. The requirements shall only apply 
where tanks have an individual storage capacity 
that exceeds the exempt amounts specified in 
Tables 307.8(1) and 307.8(2) The fire area 
containing the tank(s) shall be classified as Use 
Group H-2. 

418.3.2.1 Mixed use groups: Where the 
storage tank area is located in a building of two 
or more use groups, the Use Group H-2 fire 
area shall be completely separated from 
adjacent fire areas in accordance with the 
requirements of 780 CMR 3 1 3 . 1 .2. 

418.3.2.1.1 Height exception: Where 
storage tanks are located within only a 
single story, the height limitation of 
780 CMR 503.3 shall not apply for the Use 
Group i{-2 fire area. 

418.3.2.2 Tank protection: All storage tanks 
shall be noncombustible and protected from 
physical damage. Afire separation assembly 
around the storage tank(s) shall be permitted to 
be classified as the method of protection from 
physical damage. 

418.3.2.3 Tanks for Class I flammable 
liquid: All storage tanks for Class \ flammable 
liquids shall be double-wall tanks. A double- 
wall tank shall consist of an approved tank 
conforming to the requirements of the 
mechanical code listed in Appendix A, 
installed within a completely enclosed 



noncombustible containment structure. The 
containment structure shall prevent the stored 
liquid from escaping into the room or area in 
which the tank is located. A leak detection 
alarm shall be provided to identify a leak of the 
primary wall of the tank. The alarm shall 
conform to 780 CMR 418.3.2.6. 

418.3.2.4 Suppression: The Use Group H-2 
fire area shall be equipped throughout with an 
approved automatic fire sprinkler system, 
installed in accordance with 780 CMR 906.2. 1, 
or with a foam-extinguishing system The 
automatic fire suppression system shall be 
supervised by method 1 , 2 or 3 of 780 CMR 
923.1. 

418.3.2.5 Leakage containment: A liquid- 
tight containment area compatible with the 
stored liquid shall be provided to retain 1 1 0% 
of the entire capacity of all the storage liquid in 
the event of a leak in a tank plus the capacity 
of the automatic fire suppression system 
activated for a period of 30 minutes The 
storage tanks and the leakage containment area 
shall be provided with an approved method to 
drain manually the flammable or combustible 
liquid. 

Exception: Rooms where only double- wall 
storage tanks conforming to 780 CMR 
418.3.2.3 are used to store Class I, II and 
ULA. Kflammable and combustible liquids 
shall not be required to have a leakage 
containment area 

418.3.2.6 Leakage alarm: An approved 
automatic alarm shall be provided to indicate a 
leak in a storage tank and room. The alarm 
shall sound an audible signal, 15 dBa above the 
ambient sound level, at every point of entry 
into the room in which the leaking storage tank 
is located. An approved sign shall be posted 
on every entry door to the tank storage room 
indicating the potential hazard of the interior 
room environment, or the sign shall state, 
"Warning, when alarm sounds, the 
environment within the room may be 
hazardous." The leakage alarm shall also be 
supervised in accordance with 780 CMR 923.2 
to transmit a trouble signal. 

418.3.2.7 Tank vent: Storage tank vents shall 
terminate to the outdoor air, The vent 
termination shall be in an approved location a 
minimum of 12 feet (3658 mm) above adjacent 
ground level and ten feet (3048 mm) from a lot 
line, ventilation intake opening, openable 
window or door. 

418.3.2.8 Room ventilation: Storage tank 
areas storing Class I hquids, or Class II or niA 
liquids at temperatures above flash point, shall 
be ventilated at a rate sufficient to maintain the 
concentration of vapors within the area at or 
below 25% of the lower explosive limit. 



86 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



Ventilation requirements shall be determined 
by either calculations based on anticipated 
fugitive emissions or by sampling of the actual 
vapor concentration levels under normal 
operating conditions. The sampling shall be 
conducted at a five-foot radius from each 
potential vapor source in the storage area. 
Provision shall be made for make-up air to 
avoid short-circuiting the ventilation. 

418.3.2.9 Explosion venting; Where Class I 
liquids are being stored, explosion venting 
shall be provided in accordance with 780 CMR 
417.5 

418.3.2.10 Tank openings other than vents: 
Tank openings other than vents from tanks 
inside buildings shall bedesigned to ensure that 
liquids or vapor concentrations are not released 
inside the building and shall conform to 
780CMR418.3.2.10.1 through 418.3.2.10.5. 

418.3.2.10.1 Liquid tight: All tank 
openings at the maximum liquid level or 
below shall be liquid tight. 

418.3.2.10.2 Closed: All tank openings 
above the maximum liquid level shall be 
normally closed. 

418.3.2.10.3 External valve: Each 
connection through which liquid is capable 
of gravity flow from a tank inside a building 
shall be provided with an external valve 
located as close as practical to, but not more 
than two feet from, the shell of the tank. 

418.3.2.10.4 Valves on transfer 
connections: Tanks storing Class I or Class 
II liquids shall be provided with either a 
normally closed, remotely activated valve or 
an automatic-closing, heat-activated valve 
or other approved device on each liquid 
transfer connection below the liquid level, 
except for connections utilized for 
emergency disposal. 

418.3.2.10.5 Overflow protection: Tanks 
shall be equipped with a device, or other 
means provided, to prevent overflow into 
the building. 

418.3.3 Liquefied petroleum gas distribution 
facilities: The design and construction of propane, 
butane, propylene, butylene and other liquefied 
petroleum gas distribution facilities shall conform 
to the applicable provisions of 780 CMR 
418.3.3.1 through 418.3.3.5.2. The storage and 
handling of liquefied petroleum gas systems shall 
conform to the fire prevention code listed in 
Appendix A. The design and installation of 
piping, equipment and systems which utilize 
liquefied petroleum gas shall be in accordance 
with the mechanical code listed in Appendix A. 
Liquefied petroleum gas distribution facilities 
shall be ventilated in accordance with the 



mechanical code listed in Appendix A and 
780CMR418.3.3.1. 

418.3.3.1 Air movement: Liquefied petroleum 
gas distribution facilities shall be provided 
with air inlets and outlets arranged so that air 
movement across the floor of the facility will 
be uniform. The total area of both inlet and 
outlet openings shall be at least one square inch 
(0.00065 m") for each one square foot (0.093 
m'^ of floor area. The bottom of such openings 
shall not be more than six inches (152 mm) 
above the floor. 

418.3.3.2 Construction: Liquefied petroleum 
gas distribution facilities shall be constructed 
in accordance with 780 CMR 418.3.3.3 for 
separate buildings, 780 CMR 418.3.3.4 for 
attached buildings or 780 CMR 418.3.3.5 for 
rooms within buildings. 

418.3.3.3 Separate buildings: Where located 
in separate buildings, liquefied petroleum gas 
distribution facilities shall be occupied 
exclusively for that purpose or for other 
purposes having similar hazards. Such 
buildings shall be limited to one story in height 
and shall conform to 780 CMR418. 3. 3. 3.1 and 
418.3.3.3.2. 

418.3.3.3.1 Floors: The floor shall not be 
located below ground level and any spaces 
beneath the floor shall be solidly filled or 
shall be left unenclosed. 

418.3.3.3.2 Materials: Walls, floors, 
ceilings, columns and roofs shall be 
constructed of noncombustible materials. 
Exterior walls, ceilings and roofs shall be 
constructed of material designed for 
explosion venting or, if of heavy 
construction such as solid brick masonry, 
concrete block or reinforced concrete, 
explosion-venting windows or panels in 
walls or roofs shall be provided having an 
explosion-venting area of at least one square 
foot (0.093 m) for each 50 cubic feet 
(1.40 m) of enclosed volume. 

418.3.3.4 Attached buildings: Where liquefied 
petroleum gas distribution facilities are located 
in an attached structure, the attached perimeter 
shall not exceed 50% of the perimeter of the 
space enclosed and the facility shall comply 
with 780 CMR 418.3.3.3 and 418.3.3.4.1. 
Where the attached perimeter exceeds 50%, 
such facilities shall comply with 780 CMR 
418.3.3.5. 

418.3.3.4.1 Fire separation assemblies: 
Separation of the attached structures shall be 
provided by fire separation assemblies 
having a fireresistance rating of not less 
than one hour and shall not have openings. 
Fire separation assemblies between 
attached structures occupied only for the 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



storage of LP-gas are permitted to have_^?-e 

doors that comply with 780 CMR 716.0. 

Such fire separation assemblies shall be 

designed to withstand a static pressure of at 

least 100 pounds per square foot (psf) (488.2 

kg/m^X except where the building to which 

the structure is attached is occupied by 

operations or processes having a similar 

hazard. 

418.3.3.5 Rooms within buildings: Where 

liquefied petroleum gas distribution facilities 

are located in rooms within buildings, such 

rooms shall be located in the first story and 

shall have at least one exterior wall with 

sufficient exposed area to permit explosion 

venting as provided for in 780 CMR 

418.3.3.5.1. The building in which the room is 

located shall not have a basement or 

unventilated crawl space and the room shall 

comply with 780 CMR 418.3.3.5.1 and 

418.3.3.5.2. 

418.3.3.5.1 Materials: Walls, floors, 
ceilings and roofs of such rooms shall be 
constructed of approved noncombustible 
materials. Exterior walls and ceilings shall 
be either of lightweight materials designed 
for explosion venting or, if of heavy 
construction such as solid brick masonry, 
concrete block or reinforced concrete, 
explosion-venting windows or panels in 
walls or roofs shall be provided having an 
explosion-venting area of at least one square 
foot (0.093 m^) for each 50 cubic feet (1.40 
m') of enclosed volume. 

418.3.3.5.2 Common construction: Walls 
and floor/ceiling assemblies common to the 
room and to the building within which the 
room is located shall have a fireresistance 
rating of not less than one hour and without 
openings. Common walls for rooms 
occupied only for storage of LP-gas are 
permitted to have openings which shall be 
equipped with y4-hour approved opening 
protectives complying wdth 780 CMR 716.0 
or 718.0. Such wails and ceiling shall be 
designed to withstand a static pressure of at 
least 100 psf (488.2 kg/m). Where 
approved, 780 CMR 418.3.3.5.2 shall not 
apply where the building, within which the 
room is located, is occupied by operations 
or processes having a similar hazard. 

41S.3.4 Dry cleaning plants: The construction 
and installation of dry cleaning plants shall be in 
accordance with the requirements of 780 CMR, 
the mechanical code, the plumbing code and 
NFiPA 32 listed in Appendix A. 

418.4 Use Group H-3: Occupancies in Use Group 
H-3 shall be constmcted in accordance with the 



applicable provisions of 780 CMR and the fire 
prevention code listed in Appendix A. 

418.5 Use Group H-4: Occupancies in Use Group 
H-4 shall be constructed in accordance with the 
applicable provisions of 780 CMR and the fire 
prevention code listed in Appendix A- 

780 CMR 419.0 APPUCATION OF 
FLAMMABLE FINISHES 

419.1 General: The provisions of 780 CMR 419 
shall apply to the construction, installation and use 
of buildings and structures, or parts thereof, for the 
spraying oi flammable paints, varnishes and lacquers 
or other flammable materials or mixtures or 
compounds used for painting, varnishing, staining or 
similar purposes. All such construction and 
equipment shall comply with NFiPA 33 and 34 
listed in Appendix A 

419.2 Spray spaces: All spray spaces shall be 
ventilated with an exhaust system to prevent the 
accumulation of flammable mist or vapors in 
accordance with the mechanical code listed in 
Appendix A. Where such spaces are not separately 
enclosed, noncombustible spray curtains shall be 
provided to restrict the spread oi flammable vapors. 

419.2.1 Spray booths: All spray booths shall be 
constructed of approved noncombustible materials 
and equipped with mechanical ventilating systems 
in accordance with the mechanical code listed in 
Appendix A. 

419.2.2 Spray rooms: All spray rooms shall be 
enclosed mfire separation assemblies with not 
less than a one-hour fireresistance rating. Floors 
shall be waterproofed and drained in an approved 
manner. 

419.2.3 Spray storage rooms: Rooms used for 
the storage of spraying materials essential to the 
flammable finish operation shall comply with 
NFLPA 30 and the fire prevention code listed in 
Appendix A. 

419.3 Fire protection: An automatic fire 
suppression system shall be provided in all spray, 
dip and immersing spaces and storage rooms, and 
shall be installed in accordance with 780 CMR 9. 

780 CMR 420.0 MOBILE UNITS 

420.1 For regulations pertaining to Mobile Units, see 
780 CMR 35, and 780 CMR R3 

780 CMR 421.0 SWIMMING POOLS 
(Refer to M.G.L c 140, § 206 for further 
requirements pertaining to public or semi-public, 
outdoor, inground swimming pool enclosures, 
safety equipment, inspection, and penalties for 
violations.) 



88 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECL^L USE AND OCCUPANCY 



421.1 General: Swimming and bathing pools shall 
conform to the requirements of 780 CMR 421.0 
provided that 780 CMR 42 1 .0 shall not be applicable 
to any such pool less than 24 inches (610 mm) deep 
or having a surface area less than 250 square feet 
(23.25 m^), except where such pools are permanently 
equipped with a water-recirculating system or 
involve structural materials. For the purposes of 
780 CMR, pools are classified as private swimming 
pools, public swimming pools or semi-public 
swimming pools, as defmed in 780 CMR All. 2. 
Materials and constructions used in swimming pools 
shall comply with the applicable requirements of 
780 CMR. 

421.2 Definitions: The following words and terms 
shall, for the purposes of 780 CMR 421.0 and as 
used elsewhere in 780 CMR, have the meanings 
shown herein. 

Pools, swimming, hot tubs and spas 

Above-ground/on-ground pool: See definition of 
private swimming pool. 

Barrier: A fence, a wall, a building wall or a 
combination thereof which completely surrounds 
the swimming pool and obstructs access to the 
swimming pool. (Refer to M.G.L. c 140, § 206 
for required enclosure of public or semi-public, 
outdoor, inground swimming pools.) 
Hot tub (special purpose pool): A unit designed 
for recreational and therapeutic use which is 
shallow in depth and not meant for swimming or 
diving. These pools are not drained, cleaned or 
refilled for each user. It may include, but not be 
limited to hydrojet circulation, hot water, cold 
water mineral baths, air induction bubbles, or any 
combination thereof Industry terminology for 
such a pool includes but is not limited to, 
therapeutic pool, hydrotherapy pool, whirlpool, 
hot spa, hot tubs, float tanks, etc. This standard 
excludes residential units and facilities used or 
under the direct supervision and control of 
licensed medical personnel. 
In-ground pool: See definition of private 
swimming pool. 

Private swimming pool: Any structure that 
contains water over 24 inches (610 mm) in depth 
and which is used, or intended to be used, for 
swimming or recreational bathing in connection 
with an occupancy in Use Group R-3 or R-4 and 
which is available only to the family and guests of 
the householder. This includes in-ground, above- 
ground £ind on-ground swimming pools, hot tubs 
and spas. 

Private swimming pool, indoor: Any private 
swimming pool that is totally contained within a 
private structure and surrounded on all four sides 
by walls of said structure. 
Private swimming pool, outdoor: Any private 
swimming pool that is not an indoor pool. 



Public outdoor, inground swimming pool: Any 
swimming pool which is used, or intended to be 
used, for swimming or recreational bathing by 
the general public Refer to M.G.L. c 140, § 206 
for requirements pertaining to public or semi- 
public, outdoor, inground swimming pool 
enclosures, safety equipment, inspection, and 
penalties for violations. 

Public swimming pool, outdoor: Any public 
swimming pool that b not defined as an outdoor, 
inground swimming pooL 
Semi-public outdoor, inground swimming pool: 
(as defmed by M.G.L, c 140, § 206) any 
swimming or wading pool on the premises of, or 
used in connection with, a hotel, motel, trailer 
court, apartment house, country club, youth 
club, school, camp, or similar establishment 
where the primary purpose of the establishment 
is not the operation of the swimming facilities. 
Semi-public outdoor, inground swimming pool 
shall also mean a pool constructed and 
maintained by groups for the purposes of 
providing bathing facilities for members and 
quests only. Refer to M.G.L. c. 140, § 206 for 
requirements pertaining to public or semi-public, 
outdoor, inground swimming pool enclosures, 
safety equipment, inspection, and penalties for 
violations. 

Semi-public swimming pool, outdoor: Any semi- 
public swimming pool that is not defined as a 
semi-public outdoor, inground swimming pool 
Spa: See definition of private swimming pool. 
Wading Pool: Aa pool of water in a basin having 
a maximum depth of less than two feet intended 
chiefly as a wading place for children. It does 
not include any residential pool as herein 
defined. 

421.3 Permits and construction documents: A 

swimming pool or appurtenances thereto shall not be 
constructed, installed, enlarged or altered until 
construction documents have been submitted and a 
permit has been obtained fi-om the code official. The 
approval of all city, coimty and state authorities 
having jurisdiction over swimming pools shall be 
obtained before applying to the code official for a 
permit. Certified copies of these approvals shall be 
filed as part of the supporting data for the permit 
application. 

421.3.1 Construction documents: Construction 
documents shall accurately show dimensions and 
construction of the pool and appurtenances and 
properly established distances to lot lines, 
buildings, walks and fences, as well as details of 
the water supply system, drainage and water 
disposal systems, and all appurtenances pertaining 
to the swimming pool. Detailed construction 
documents of structures, vertical elevations and 
sections through the pool showing depth shall be 
included. 



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89 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



421.4 Locations: Private swimming pools shall not 
encroach on any front or side yard required by 
780 CMR or by the governing zoning law, unless in 
accordance with specific rules of the jurisdiction in 
which the pool is located. A wall of a swimming 
pool shall not be located less than six feet (1829 
mm) from any rear or side property line or ten feet 
(3048 mm) from any street property line, unless in 
accordance with specific rules of the jurisdiction in 
which the pool is located. 

421.5 Structural design: The pool structure shall be 
engineered and designed to withstand the expected 
forces to which the pool will be subjected. 

421.5.1 Wall slopes: To a depth up to two feet 
nine inches (838 mm) from the top, the wall slope 
shall not be more than one unit horizontal in five 
units vertical (1:5). 

421.5.2 Floor slopes: The slope of the floor on 
the shallow side of the transition point shall not 
exceed one unit vertical to seven units horizontal 
(1:7). For public pools greater than 1,200 square 
feet (111.6 m"), the slope of the floor on the 
shallow side of the transition point shall not 
exceed one unit vertical to ten units horizontal 
(1:10). The transition point between shallow and 
deep water shall not be more than five feet (1524 
mm) deep. 

421.5.3 Surface cleaning: All swimming pools 
shall be provided with a recirculating skimming 
device or overflow gutters to remove scum and 
foreign matter from the surface of the water. 
Where skimmers are used for private pools, there 
shall be at least one skimming device for each 
1,000 square feet (93 m*) of surface area or 
fraction thereof For public pools where water 
skimmers are used, there shall be at least one 
skimming device for each 500 square feet (55.8 
m'^ of surface area or fraction thereof Overflow 
gutters shall not be less than three inches (76 nrni) 
deep and shall be pitched to a slope of one unit 
vertical to 48 units horizontal (1:48) toward 
drains, and constructed so that such gutters are 
safe, cleanable and that matter entering the gutters 
will not be washed out by a sudden surge of 
entering water. 

421.5.4 Walkways: All public and semi-public 

swimming pools shall have walkways not less than 
four feet (1219 mm) in width extending entirely 
around the pool. Curbs or sidewalks around any 
swimming pool shall have a slip-resistant surface for 
a width of not less than four foot (305 mm) at the 
edge of the pool, and shall be so arranged as to 
prevent return of surface water to the pool. 



421.5.5 Steps and ladders: At least one means of 
egress shall be provided from private pools. All 
public and semi-public pools shall provide 
ladders to other means of egress at both sides of 
the diving section and at least one means of egress 
at the shallow section; or at least one means of 
egress in the deep section and the shallow section 
if diving boards are not provided. Treads of steps 
and ladders shall have slip-resistant surfaces and 
handrails on both sides, except that handrails are 
not required where there are not more than four 
steps or where the steps extend the frill width of 
the side or end of the pool. (Refer to 521 CMR 
19.00, the Architectural Access Board's rules 
and regulations, for requirements pertaining to 
the accessibility of all public and semi-public 
swimming pools.) 

421.6 Water supply: All swimming pools shall be 
provided with a potable water supply, free of cross 
connections with the pool or its equipment. 

421.6.1 Water treatment: See 105 CMR 935.000 
Minimum Standards for Swimming Pools. 

421.6.2 Drainage systems: The swimming pool 
and equipment shall be equipped to be emptied 
completely of water and the discharged water 
shall be disposed of in an approved manner that 
will not create a nuisance to adjoining property. 

421.7 Appurtenant structures: All appurtenant 
structures, installations and equipment, such as 
showers, dressing rooms, equipment houses or other 
buildings and structures, including plumbing, 
heating and air conditioning systems, shall comply 
with all applicable requirements of 780 CMR, 
applicable zoning laws and requirements, 105CMR 
435.000: Minimum Standards for Swimming 
Pools (State Sanitary Code: Chapter V), 248 CMR 
2.00 : the State Plumbing Code, and 527 CMR 
12.00: the State Electrical Code. 

421.7.1 Accessories: All swimming pool 
accessories shall be designed, constructed and 
installed so as not to be a safety hazard. 
Installations or structures for diving purposes 
shall be properly anchored to insure stability. 

421.8 Equipment installations: Pumps, filters and 
other mechanical and electrical equipment for public 
swimming pools shall be enclosed in such a maimer 
as to provide access only to authorized persons and 
not to bathers. Construction and drainage shall be 
arranged to avoid the entrance and accumulation of 
water in the vicinity of electrical equipment. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



421.9 Enclosures for outdoor, inground public and 
semi-public swimming pools: Outdoor, inground 
public and semi-public swimming pools shall be 
provided with an enclosure in accordance with 
M.G.L. c. 140, § 206. 

42L9.1 Enclosure for public and semi-public 
outdoor, inground swimming pools: Every public 
and semi-public outdoor, inground swimming 
pool shall be enclosed by a fence six feet in 
height and firmly secured at ground level 
provided that any board or stockade fence or 
structure shall be at least five feet in height, but 
if over five feet in height, the fence shall be 
chain link. Such enclosure, including gates 
therein, shall not be less than six feet above the 
ground, and any gate shall be self-latching with 
latches placed four feet above the ground or 
otherwise made inaccessible from the outside to 
children up to eight years of age. Such 
enclosure shall be constructed of such material 
and maintained so as not to permit any opening 
in said enclosure, other than a gate, wider than 
three inches at any point along the enclosure. 
Any such pool shall be equipped with at least 
one life ring and rescue hook, 

421.9.1.1 Enclosure for all other public and 
semi-public swimming pools: The enclosure 
shall extend not less than four feet (1219 mm) 
above the ground All gates shall be self- 
closing and self-latching with latches placed 
at least four feet (1219 mm) above the 
ground, 

421.9.2 Construction of enclosure for all other 
public and semi-public swimming pools: 

Enclosure fences shall be constructed so as to 
prohibit the passage of a sphere larger than four 
inches (102 mm) in diameter through any opening 
or under the fence. Fences shall be designed to 
withstand a horizontal concentrated load of 200 
pounds (91 kg) applied on a one-square-foot 
(0.093 ni2) area at any point of the fence. 

421.10 Enclosures for private swimming pools, 
spas and hot tubs: In lieu of any zoning laws or 
ordinances to the contrary, private swimming pools, 
spas and hot tubs shall be enclosed in accordance 
with 780 CMR 421.10.1 through 421.10.4 or by other 
approved barriers. 

421.10.1 Outdoor private swimming pool: An 
outdoor private swimming pool, including an in- 
ground, above ground or on-ground pool, hot tub 
or spa shall be provided with a barrier wiiich shall 
comply with the following. 

1. The top of the barrier shall be at least 48 
inches (1219 mm) above finished ground level 



measured on the side of the barrier which faces 
away from the swimming pool. The maximum 
vertical clearance between finished ground 
level and the barrier shall be two inches (51 
mm) measured on the side of the barrier which 
faces away from the swimming pool. Where 
the top of the pool structure is above finished 
ground level, such as an above-ground pool, 
the barrier shall be at finished ground level, 
such as the pool structure, or shall be mounted 
on top of the pool structure. Where the barrier 
is mounted on top of the pool structure, the 
maximum vertical clearance between the top of 
the pool structure and the bottom of the barrier 
shall be four inches (102 mm). 

2. Openings in the barrier shall not allow 
passage of a four-inch (102 mm) diameter 
sphere. 

3 . Solid barriers shall not contain indentations 
or protrusions except for normal construction 
tolerances and tooled masonry joints. 

4. Where the barrier is composed of 
horizontal and vertical members and the 
distance between the tops of the horizontal 
members is less than 45 inches (1 143 mm), the 
horizontal members shall be located on the 
swimming pool side of the fence. Spacing 
between vertical members shall not exceed VA 
inches (44 mm) in width. Decorative cutouts 
shall not exceed VA inches (44 mm) in width. 

5. Where the barrier is composed of 
horizontal and vertical members and the 
distance between the tops of the horizontal 
members is 45 inches (1143 mm) or more, 
spacing between vertical members shall not 
exceed four inches (102 mm). Decorative 
cutouts shall not exceed VA inches (44 mm) in 
width. 

6. Maximum mesh size for chain link fences 
shall be a 1 Vi-inch (32 mm) square unless the 
fence is provided with slats fastened at the top 
or the bottom which reduce the openings to not 
more than iy4-inches (44 mm). 

7. Where the barrier is composed of diagonal 
members, such as a lattice fence, the maximum 
opening fomied by the diagonal members shall 
be not more than PA inches (44 mm). 

8. Access gates shall comply with the 
requirements of 780 CMR 421.10.1 items 1 
through 7, and shall be equipped to 
accommodate a locking device. Pedestrian 
access gates shall open outwards away from 
the pool and shall be self-closing and have a 
self-latching device. Gates other than 
pedestrian access gates shall have a self- 
latching device. Where the release mechanism 
of the self-latching device is located less than 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



54 inches (1372 nun) from the bottom of the gate: 
(a) the release mechanism shall be located on the 
pool side of the gate at least three inches (76 mm) 
below the top of the gate; and (b) the gate and barrier 
shall not have an opening greater than ¥1 inch (13 
mm) within 18 inches (457 mm) of the release 
mechanism. 

9. Where a wall of a dwelling serves as part of 
the barrier, one of the following shall apply: 
9.1. All doors with direct access to the pool 
through that wall shall be equipped with an 
alarm which produces an audible warning 
when the door and its screen, if present, are 
opened. The audible warning shall 
commence not more than seven seconds 
after the door and screen door, if present, are 
opened and shall sound continuously for a 
minimum of 30 seconds. The alarm shall 
have a minimum sound pressure rating of 85 
dB A at ten feet (3048 mm) and the sound of 
the alarm shall be distinctive from other 
household sounds such as smoke alarms, 
telephones and door bells. The alarm shall 
automatically reset under all conditions. 
The alarm shall be equipped with manual 
means, such as touchpads or switches, to 
deactivate temporarily the alarm for a single 
opening from either direction. Such 
deactivation shall last for not more than 15 
seconds. The deactivation touchpads or 
switches shall be located at least 54 inches 
(1372 mm) above the threshold of the door. 
9.2. The pool shall be equipped with an 
approved power safety cover. 
10. Where an above-ground pool structure is 
used as a barrier or where the barrier is 
mounted on top of the pool structure, and the 
means of access is a fixed or removable ladder 
or steps, the ladder or steps shall be surrounded, 
by a barrier which meets the requirements of 
780 CMR 421.10.1 items 1 through 9. A re- 
movable ladder shall not constitute an accept- 
able alternative to enclosure requirements. 

421.10.2 Indoor private swimming pool: All 

walls surrounding an indoor private swimming 
pool shall comply with 780 CMR 421.10.1, item 
9. 

421.103 Prohibited locations: Barriers shall be 
located so as to prohibit permanent structures, 
equipment or similar objects from being used to 
climb the barriers. 

421.10.4 Exemptions: The following shall be 
exempt from the provisions of 780 CMR 421.0. 

1. A spa or hot tub with an approved safety 
cover. 

2. Fixtures which are drained after each use. 

421.11 Diving boards: Minimum water depths and 
distances for diving hoppers for pools, based on 
board height above water, shall comply with Table 
42 1 . 1 1 ( 1 ) for public pools and Table 42 1 . 1 1 (2) for 



private pools. 

The maximum slope permitted between point D2 
and the transition point shall not exceed one unit 
vertical to three units horizontal (1:3) in private and 
public pools. D, is the point directly under the end 
of the diving boards. D2 is the point at which the 
floor begins to slope upwards to the transition point. 
See Figure 421.11. 

Figure 421.11 

MINIMUM WATER DEPTHS AND 

DISTANCES BASED ON BOARD HEIGHT 

FOR ALL PUBLIC, SEMI PUBUC AND 

PRIVATE POOLS 



-TYPICAL POSITION OF TIP 
OF BOARD RELATIVE TO PT. A 



WATER UNE 

PT. C PT. D 




TRANSITION POINT 



Table 421.1 1(1) 

MINIMUM WATER DEPTHS AND 

DISTANCES BASED ON BOARD 

HEIGHT FOR ALL PUBLIC POOLS 



Board height 


Minimum depth at 

D] directly under 

end of board 


Distance 
between 
D] andD2 


Minimum 

depth at 

D2 


2'2" (% meter) 
2'6" (% meter) 
1 meter 
3 meter 


7'0" 
7"6" 
8'6" 

iro" 


8'0" 
9'0" 
lO'O" 
lO'O" 


8'6" 
9'0" 
lO'O" 

12'0" 



Note a. 1 foot = 304.8 mm. 

Table 421.11(2) 

MINIMUM WATER DEPTHS AND 

DISTANCES BASED ON BOARD HEIGHT 

FOR PRIVATE POOLS 



Board height 


Minimum 
depth^atD, 
directly under 
end of board 


Distance 

between D] 

andDj 


Minimum 
depth* at D2 


r8"(W meter) 


60" 


7'0" 


7'6" 


2'2" (% meter) 
2'6" (V4 meter) 


6' 10" 
T5" 


7'6" 
8'0" 


8'0" 
8'0" 


3'4"(1 meter) 


86" 


9'0" 


9'0" 



Note a. 1 foot = 304.8 mm. 

780 CMR 422.0 EXISTING BUILDINGS 

422.1 Existing Buildings: See 780 CMR 34. 

422.2 Places of assembly 

422.2.1 Change of use: An existing building or 
structure or part thereof shall not be altered or 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



converted into a place of assembly unless it 
complies with the provisions of 780 CMR 34 
applicable to places of assembly. 



780 CMR 423.0 GROUP RESIDENCE 

423.1 Scope: Except as may otherwise 



be 



specifically provided for in 780 CMR 423.0 , the 
requirements of 780 CMR, in its entirety, and as 
applicable, shall apply. 

423. 1. 1 Department of Mental Retardation (DMR) 
Group Homes: 780 CMR 423. shall not apply to 
premises operated or licensed by the Department 
of Mental Retardation (DMR) pursuant to 
115 CMR 7.00 and 8.00, upon the completion of 
a DMR safety assessment for each individual and 
an approved safety plan for each location where 
services and supports are provided. Such 
premises shall be treated as conventional R-4, R- 
3, R-2 and R-1 use as applicable. 

423.2 Definition: A group residence is a premise 
licensed by or operated by an agency of the 
Commonwealth of Massachusetts or subdivision 
thereof, as a special residence for those who are 
capable of self-preservation in the following 
categories: 

1. not more than 12 unrelated persons between 
the ages of seven and 15 years of age inclusive; or 

2. not more than 25 unrelated persons, 16 years 
of age or over; or 

3. a combination of 780 CMR 423.2 category 1 
and 2 above consisting of not more than 18 
unrelated persons over seven years of age 
calculated at the rate of two such persons, or 
portion thereof, from Category 2 being equal to 
one such person in Category 1 all in accordance 
with Table 423.2. 

Note: In determining the classification for 
proposed use, group residence shall not be 
construed as being similar in any way to a multi- 
family dwelling, two-family dwelling, boarding 
house, lodging house, dormitory, hotel, school or 
institution of any kind. For building code 
purposes, it shall be treated as a single-family 
residential building. 



Table 423.2 

Group Residence - Maximum Capacity 

Combination of Categories 






Category 
Number 


Number of Residents per Category 


Category I 


12 


11 


10 


9 


8 


7 


6 


5 


4 


3 


2 


1 





Category 2 





2 


4 


6 


8 


10 


12 


13 


14 


15 


16 


n 


25 


Maximum total 
residents 


12 


13 


14 


15 


16 


b 


18 


18 


18 


18 


18 


18 


25 



423.2.1 Special definitions: For the purpose of 
780 CMR 423. 0, the following terms shall be defined 
exclusively for use with group residences: 



Self preservation: Having the capability, both 
mentally and physically, to take action to preserve 
one's awn life. Specifically, to egress the building 
within 2'/2 minutes. (Reference inspection 
procedures in 780 CMR 423.8 and 423.9.) 

Egress: A continuous unobstructed path of travel 
from any space in a building to the open air 
outside ai grade. 

Principal means of egress: The primary choice of 
two routes normally used by occupants to enter or 
leave a building. 

Escape route: To reduce the possibility of 
entrapment in the event that the principal means 
of egress is blocked by fire or smoke, an escape 
route shall be available which performs in 
accordance with 780 CMR 423.6 and 423.9. In 
an existing building where a second means of 
egress is physically impractical from above grade 
floors, any proven, usable path to the open air 
outside at grade shall be deemed acceptable, 
including but not limited to connecting doors, 
porches, windows within six feet of grade, ramps, 
fire escapes, balcony evacuation systems, etc. 

Authorized inspectors: The state or local building 
official having jurisdiction and a representative of 
the licensing or operating agency having 
jurisdiction. 

Room: See definition of "Habitable space" and 
"Occupiable room" in 780 CMR 201.0. 

423.3 Existing buildings: The requirements of 

780 CMR 423.0, shall also apply to existing 

dwelling units which are to be converted to a 

group residence and alternative requirements set 

forth in 780 CMR 34 that conflict with the 

requirements of 780 CMR 423. shall not apply. 

423.3.1 Height limitations: Existing buildings, 

of Type SB construction, greater than 2 'A 

stories, or 35 feet in height may be allowed to 

be used (as an exception to Table 503) as a 

group residence. 

423.4 Plans and specifications: Plans shall be filed 
with the building official having jurisdiction in 
accordance with 780 CMR 110. Ofor any building to 
be constructed as, or altered for use as, a group 
residence under 780 CMR 423. 0. The floor plans 
shall show all rooms, spaces, closets, doors, 
corridors, windows, stairs and stairways, hazardous 
vertical openings and the location of all required 
fire warning equipment and proposed fire 
suppression equipment 

423. S Hazardous contents: Any contents which 
represent a fire hazard greater than that which 
could be expected of ordinary household 
furnishings, shall not be allowed. Storage shall not 
be allowed above the second floor. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



423.5.1 Interior fittish: Only Class I and Class II 
interior finish materials shall be allowed in the 
principal means of egress. In refinishing any 
other area, material having a Class III flame 
spread rating shall be allowed provided it does 
not decrease the existing rating. The smoke 
contribution rating of any material shall not 
exceed 450 (see 780 CMR 704.0). 

423.5.2 Exception: In existing buildings, the 
required flame spread or smoke development 
classification of interior surfaces may be obtained 
by applying approved fire retardant paints or 
solutions to existing interior surfaces having a 
higher flame spread rating than permitted 

423.6 Egress: In existing buildings there shall be 
one means of egress and one escape route serving 
each floor, remote as possible from each other and 
leading to grade. The stairway between the first and 
second floors, if unenclosed, may remain unenclosed 
to preserve fiinctional and aesthetic requirements. 
In new construction, two means of egress are 
required in accordance with the One- and 
Two-Family Dwelling Code, and stairways above 
the grade floor shall be enclosed with one hour 
fireresistive construction. 

Exception: 

1. Where the Group Residence is protected with 
afire suppression system according to NFiPA 
13D or better as listed in Appendix A only one 
means of egress shall be required from floors 
above the grade floor in existing buildings and 
new construction. 

2. Where the Group Residence is protected with 
a fire suppression system according to NFiPA 
13D or better as listed in Appendix A the 
enclosure of stairways is not required 

423. 7 Fire protection systems 

423. 7.1 Hazardous vertical openings: Openings 
to such spaces as laundry chutes, dumbwaiters, 
heating plenums or combustible concealed spaces 
shall be permanently blocked with one hour 
construction, as regulated by the provisions of 
780 CMR 7. 

423.7.2 Automatic fire warning systems: An 
approved automatic fire warning system shall be 
provided in accordance with 780 CMR 9. 

423. 8 Inspections: There shall be three mandatory 
types of inspections as described below. The results 
of such inspections shall be on file in the office of the 
building official with copies sent to the licensing or 
operating agency on a prepared checklist and signed 
by the authorized inspectors. 

423.8.1 Temporary certificate: The building 
official shall perform plan review and 
post-construction inspection to ensure that the 
building conforms to 780 CMR. He shall issue a 



temporary ceriificate of occupancy effective for 
90 days only. 

423.8.2 Final certificate: Before issuance of the 
final certificate of occupancy, the authorized 
inspectors shall mutually conduct a test (see 
780 CMR 423. 9. 1) to ensure that the occupants 
are capable of self-preservation. Upon complete 
satisfaction of all requirements, the building 
official shall then issue a permanent certificate of 
occupancy. This test shall be conducted once a 
year in accordance with 780 CMR 106.5 for 
purposes of recertifying both the building and the 
occupants. 

423. 9 Inspection procedure: The building and the 
occupants' capability of self-preservation constitute 
a system of life safety which are unique for each 
building and for each occupant in a group 
residence. Therefore, a simple direct test is 
specified herein to determine the capability of the 
occupant and/or the suitability of the building as a 
life safety system. 

423. 9. 1 Direct test/fire drill: A fire drill shall be 
conducted as the direct test required by 780 CMR 
423.9. The building official may require that he 
be present for the fire drill, or may accept an 
affidavit signed by the residence manager citing 
the names of the authorized inspectors present, 
the names of the occupants who participated, the 
name(s) of any occupants who failed to egress the 
building within I'h minutes, the date, time and 
place where said fire drill was held. During the 
conduct of the drill, all staff personnel of the 
group residence shall isolate themselves from the 
occupants. The authorized inspector(s), when 
present, shall then cause to be blocked any one 
point in an egress route where the choice of an 
alternate route is possible, to simulate a 
hazardous condition, and the internal alarm 
system shall be activated for I'/i minutes. 

423.9.2 Evaluation: Any occupant who fails to 
escape from the building and achieve egress 
outside the building at ground level within the I'A 
minute period shall not be permitted to remain 
living in the residence. 

Note: The occupant or the building may be at 
fault; therefore, the system has failed to 
perform adequately to provide life safety and 
is, consequently, unacceptable for that 
occupant. 

423.9.3 Other tests: Other tests are not necessary 
and shall not be required by the building official. 
It shall be the responsibility of the residence 
manager of the group residence to provide 
immediate suitable accommodations elsewhere 
for any occupant deemed unacceptable by the 
building official Each occupant must be certified 
at regular intervals but not less than every 
quarter at the group residence by the licensing or 



94 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECDVL USE AND OCCUPANCY 



operating agency. The building official may 
require an inspection at his discretion when he 
feels that either the building or the occupant may 
not conform. 

423.10 Certificate of occupancy: Any certificate of 
occupancy issued for a building intended to be used 
as a group residence, as defined in 780 CMR 423.2, 
shall become invalid if the premises have not been 
licensed or authorized by an agency of the 
Commonwealth of Massachusetts within 90 days of 
the date of issuance of the certificate of occupancy. 

780 CMR 424.0 DAYCARE CENTERS 

424.1 General: Day care centers in new or existing 
buildings shall be subject to the applicable 
provisions of 780 CMR and the special requirements 
of 780 CMR 424.0. 

424.2 Definitions: 

Day Care Center: Special occupancies in which 

clients receive care, maintenance, and 

supervision by other than relatives or legal 

guardians for less than 24 hours per day. Such 

day care centers include both child day care 

centers and adult day care centers licensed by the 

office for children or other stale agencies or 

otherwise functioning as a day care center. 

Child Day Care Centers: Falling under the 

requirements of 780 CMR 424 and being a 

sub-set of day care centers, shall be those child 

day care centers so defined in 780 CMR 202. 

Smoke Stop Partion: For purposes of 780 CMR 
424.0, a smoke stop partion shall satisfy the 
requirements of 780 CMR 711.0 for a fire portion. 

424.3 Use Group Classifications: 

424.3.1 Less than two years and nine months in 
age: Buildings and portions thereof licensed by 
the Office for Children as child day care centers 
for children two years and nine months in age or 
younger shall be classified as 1-2 use group. 

424.3.2 More than two years and nine months in 
age: Building w portions thereof licensed by the 
Office for Children as child day care centers for 
children more than two years and nine months in 
age shall be classified as E-use group. 

424.3.3 Adult Day Care Centers: Buildings or 
portions thereof licensed by agencies of the state 
or otherwise operating as day care centers and 
otherwise not classified 1-2 use or Euse shall be 
classified as B-use. 

Exception: In adult day care centers in which 
clients and staff cannot evacuate the building 
with or without assistance in three minutes, 
such adult day care centers shall be classified 



in the 1-2 category and subject to 1-2 use 
provisions of 780 CMR 424. 0. 

424.4 General Provisions: 

424.4.1 Means of Egress: Day Care Centers in 
new and existing buildings or portions thereof 
shall conform to the means of egress requirements 
as set forth in 780 CMR 10 and 780 CMR 34 as 
applicable and otherwise noted below in 
780 CMR 4240. 

424.4.1.1 Exit Signs and Means of Egress 
lighting: Exit signs and means of eg^-ess 
lighting shall conform to the requirements of 
780 CMR 1023. and 1024.0 as applicable. 

424.4.1.2 Roof Egress: Where the roof of a 
building is used as part of the day care center, 
required means of egress from the roof shall 
consist of two enclosed stairways: complying 
as exits and providing two separate protected 
ways of travel to exit discharges; or the 
required means of egress from the roof shall 
consist of one enclosed stairway complying as 
an exit providing a protected way of travel to 
an exit discharge and a protected stairway 
from the roof leading to a corridor on the 
floor (hrectly below the roof and such corridor 
shall lead to two remote arid independent exits. 
Stairways shall comply with the requirements 
of 780 CMR 10 except as noted on 780 CMR 
424.4.2. 

424.4.1.2.1 Additional Roof Space 
Requirements: Where a roof is used by a 
day care center, there shall be a solid 
smooth non-climbable fence or barrier a 
minimum of seven feet high on all sides and 
separating the day care center area from 
any other uses. Fences shall be set back at 
least three feet from the outside edge of the 
exterior wall below. A waterproof telephone 
or equivalent means of communication shall 
be located on the roof for use in 
emergencies and shall be openable without 
keys, coins, or special knowledge. 

424.4.1.3 Doors: All required means of egress 
doors shall be at least 36 inches in width. All 
other doors shall be at least 32 inches in width. 

Exception: Where the occupant load as 
calculated in accordance with 780 CMR 
1008, requires door widths in excess of 36 
inches; door widths shall conform to the 
requirements of 780 CMR 1017.3. 

424.4.1.4 Handrails: Handrails shall conform 
to the requirements of 780 CMR 1022.0 and 
when the day care center clients include 
children, in addition to an upper handrail a 
lower handrail shall be installed between 20 " 
and 24" above the nosing of the stair tread. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



424.4.1.5 Guards: Guards shall conform to 
the requirements of 780 CMR 1021.0. 

424.4.1.6 Stairways: Stairways, whether 
required means of egress interior or 
exterior stairways or supplemental 
stairways, shall comply with the 
requirements of 780 CMR 1014.0 and 
780 CMR 34.0 as applicable. 

Exception: Existing stairways shall not 
be required to satisfy the requirements of 
780 CMR 1014.6 unless so required by 
the Building Official in accordance with 
780 CMR 3400.4 or 3400.5. 

424.4.2 Mixed Use- New and Existing Buildings: 

424.4.2.1 Mixed Use- New Construction: In 

new construction mixed use buildings, day care 
centers shall conform to the separation 
requirements of 780 CMR 313.0. 

424.4.2.2 Mixed Use- Existing Buildings: In 
mixed use existing buildings the day care 
center walls shall conform to the separation 
requirements of 780 CMR 313.0 except that the 
floor - ceiling assemblies of the day care center 
for the 780 CMR 313.1.2 separation option 
shall, as a minimum, conform as follows: 

(a) For day care centers located above any 
usable space - the floor of the day care 
center shall have a minimum of a one hour 
fireresistance rating in buildings of Type 
2C, 3B and 5 construction; and a minimum 
of a two hour fireresistance rating in 
buildings of type 1, 2A, 2B, 3A and 4 
construction. 

(b) For day care centers located below 
usable space, the ceiling of the day care 
center shall have at least a one hour 
fireresistance rating or the floor above shall 
be equipped with smoke detectors 
interconnected to the day care center fire 
warning system such that smoke detector 
activation on the floor above will initiate 
alarm in the day care center. 

424.4.2.3 Mixed Day Care Use: When a day 
care center contains children or adults of 
mixed ages such that it would be classified in 
both 1-2 and B or E and B use groups, the 
provisions for the most restrictive use shall 
apply unless the building or portion thereof 
satisfies the requirements set forth in 780 CMR 
313.0. 

424.4.3 Elevator Doors: In buildings with 
elevators, the day care center: 

(1) shall not be exposed directly to the 
elevator doors opening from the elevator shaft, 

(2) at least one of the required means of 
egress shall not be exposed to the elevator 
openings. 

Elevator door openings may be separated by two 
hour fireresistance rated construction creating 



elevator lobbies and where such lobbies exist, of 
780 CMR 424.4.3(1) and (2) are deemed satisfied. 

424.4.4 Fire Protective Signaling Systems: Fire 
protective signaling systems shall be installed in 
all day care centers and shall conform to the 
requirements of 780 CMR 917.0. 

Exception: Residential occupancies identified 
in 780 CMR 424.4.5, Exception 1. 

424.4.5 Automatic Fire Detection Systems: An 
automatic fire detection system shall be designed 
and installed in accordance with the requirements 
of 780 CMR 918.0; 780 CMR 424.4.2.2(b); 
780 CMR 424.4.5 and 780 CMR 424.5 as 
applicable. 

Exception 1: Residential occupancies that 
incorporate day care center 1-2 or E- or B-Use 
and otherwise comply with all applicable 
requirements of 780 CMR 424, have a day care 
occupancy not exceeding 24 clients and 
otherwise do not have, nor are required to 
have, fire protection systems complying with 
780 CMR 917 and 780 CMR 918 shall be 
permitted to utilize single and multiple station 
smoke detectors in accordance with 780 CMR 
919. In such instances the requirements of 
780 CMR 923.2 shall not apply. 
Exception 2: Single story buildings or portions 
thereof with day care occupancies not 
exceeding 24 clients and which otherwise 
comply with all applicable requirements of 
780 CMR 424, specifically and 780 CMR 
generally, shall be required to utilize fire 
protection systems complying with 780 CMR 
917 and 780 CMR 918, but the requirements of 
780 CMR 923.2 shall not apply unless the 
building fire protection systems are otherwise 
required to conform to the requirements of 
780 CMR 923. 

(Note to Exception 2: If the basement or 

cellar of such a building is used as a portion 

of the day care center. Exception 2 of 

780 CMR 424.4.5 shall not apply). 

424.4.5.1 Location of Detectors: Smoke 

detectors shall be installed to ensure total 

coverage of the day care center and also 

located in front of the doors to the stairways 

and in the corridor providing required means 

of egress on allfioors of the day care center, 

and comply with the smoke detector 

manufacturers listed requirements. 

424.4.5.1.1 Zoning: Specific smoke 
detector zoning shall be in accordance with 
780 CMR 917.7.3 with smoke detectors 
spacing no greater than 30' unless 
otherwise allowed via manufacturer's 
listing requirements. 

424.4.5.2 Compatibility: Fire protection 
signaling systems and/or automatic fire 
detection systems that are interfaced shall 



96 



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1 1/27/98 



780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECD^L USE AND OCCUPANCY 



be listed for such mechanical and electrical 
interfacing. 

424.4. 6 Story Height Limitations: The allowed 
basement and story locations of day care centers 
in new and existing buildings shall be limited by 
the provisions of 780 CMR 424.5, as applicable to 
the use group classification of the day care 
center, and Table 780 CMR 424.4.6. 

Table 424.4.6 

PERMITTED LOCA TIONS AND REQUIRED 

SPRINKLER PROTECTION FOR 

DAY CARE CENTERS 

1-2 Child Care Occupancy Children Under Two Years Nine 
Months of Age 



Floor Level of 
Child Day Care 
Center 


Building Construction Type 


LA 


IB 


2.4 


2B 


2C 


3A 


3B 


4 


5A 


5B 


Basement /Cellar 


P 


P 


P 


P 


P 


P 


P 


P 


P 


P 


1st Story 


P 


P 


P 


P 


P 


P 


P 


P 


P 


P 


2nd Story 


PS 


PS 


PS 


S 


NP 


S 


NP 


S 


NP 


NP 


3rd Story 


PS 


PS 


PS 


S 


NP 


S 


NP 


s 


NP 


NP 


4th Story and 
Higher 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 



E Child Care Occupancy / Children 
Months of Age 


Over Two Ye 


ars 


Nine 




Floor Level of 
Child Day Care 
Center 


Building Construction Type 


lA 


IB 


2A 


28 


2C 


3A 


3B 


4 


5A 


SB 


Basement /Cellar 


P 


P 


P 


P 


P 


P 


P 


P 


P 


P 


1st Story 


P 


P 


P 


P 


P 


P 


P 


P 


P 


P 


2nd Story 


P 


P 


P 


P 


P 


P 


P 


P 


P 


P 


3rd Story 


PS 


PS 


PS 


S 


NP 


S 


NP 


S 


NP 


NP 


4th Story 


PS 


PS 


PS 


S 


NP 


S 


NP 


S 


NP 


NP 


5th to 7th Story 


PS 


PS 


PS 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


8th Story and 
Higher 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 


NP 



B - Day Care Occupancy /Adult (Elder) Day Care 



B-Use daycare 
Facilities are not 
limited in where 
they may be 
located in a 
building 



Exception (1): 

Adullt day care centers falling under 
the "Exception " to 780 CMR 424.3.3 



Exception (2): 

Adult day care centers of mixed-care 
use as described in 780 CMR 424.4.2.3 



Key to Table 

P = Permitted 

NP = Not Permitted 

S = Sprinklers Required / See 780 CMR 424.5 for 

Special Provisions 
PS = Partial Sprinklers Required / See 780 CMR 

424. 5 for Special Provisions 

424.4.7 Heating System: Any portable or 
permanent heater in spaces occupied by clients 
shall be separated from the occupied space by 
partitions, guards, screens, or other means. 
Space and unit heaters using combustible fuels 
shall be prohibited (Also see 424.4.8) 

424. 4. 8 Boiler Rooms: Boilers, furnaces or other 
fire units shall be enclosed as required in the 
BOCA National Mechanical Code listed in 
Appendix A. Boiler room doors shall not open 
into occupied areas. 



424.4.9 High Hazard Restrictions: A day care 
center shall not occupy the same building with, or 
be located within 200 feet of a high hazard 
occupancy. 

424.4.10 Accessibility for Persons with 
Disabilities: Accessibility requirements shall be 
in accordance with 521 CMR as listed m 
Appendix A. 

424.S Special Provisions: 

424.4.5.1 Application: Special provisions for 1-2, 
E and B use day care centers and relating to 
allowed location, special egress and special 
alarm requirements are found in 780 CMR 424.5 

424.5.21-2 Use Allowed Basement/Cdlar/Story 
Locations: In new and existing buildings, day 
care centers which are classified in the 1-2 use 
group shall comply with one of the following 
compliance options listed below. AH required 
means of egress for day care centers classified in 
use group 1-2 shall lead directly to grade 

1. The location of the day care center shall 
be limited to the first floor, cellar and/or 
basement; or 

2. In buildings of Type 2B, 3A or 4 
construction which are fully sprinklered and 
comply with the special provisions of 
780 CMR 424.5.4.4, the day care center shall 
be located no higher than the third floor; or 

3. In buildings of Types lA, IB or 2A 
construction and are either fully sprinklered, 
or in which the day care center and all floors 
below are sprinklered, the day care center 
shall be located no higher than the third 
floor. 

Notes: 

(1) Also see 780 CMR Table 424.4.6. 

(2) See special egress requirements of 
780 CMR 4245.4. 

424.5.3 E-Use Allowed Basement/Cellar/Story 
Locations: In new and existing buildings, day 
care centers which are classified in the E use 
group shall comply with one of the following 
compliance options listed below. All required 
means of egress for day care centers classified in 
use group E shall lead directly to grade. 

1. The location of the day care center shall 
be limited to the second floor; first floor or 
cellar and/or basement, or; 

2. In buildings of Type 2B, 3A or 4 
construction which are fully sprinklered and 
comply with the special provisions of Section 
780 CMR 424.5.4.4, the day care center shall 
be located no higher than the fourth floor; 
or; 

3. In buildings of Types lA, IB or 2A 
construction which comply with the special 
provisions of 780 CMR 424.5.4.4 and are 
either fully sprinklered, or in which the day 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



care center and all floors below are 
sprinklered, the day care center shall be 
located no higher than the seventh floor. 

Notes: 

(1) Also see 780 CMR Table 424. 4. 6. 

(2) See special egress requirements of 
780 CMR 424.5.4. 

424.5.4 B-Vse Allowed Basement/Cellar/Story 

Locations: In day care centers classified in the 

B-Use category and where staff and clients in an 

emergency can exit the building in no more than 

three minutes, with or without assistance, there 

is no restriction on locating of the day care 

center within any basement/cellar or story. 

Exception: In adult day care centers 

classified as day care 1-2 use see 780 CMR 

424.3.3. 

424.5.41-2 andE Use Egress Requirements For 
Basement and Cdlar Use: 

424.5.4.1 Basement or Cellar Use: A 
basement or cellar, as defined in 780 CMR 2, 
of a building of Type 3B or 5B construction 
may be used for a day care center in 
accordance with the following requirements: 

1. There shall be two separate and 
independent means of egress, remote from 
each other and leading directly to grade, 
or; 

2. there shall be two separate and 
independent means of egress, remote from 
each other and leading to two one hour 
fire-rated enclosed stairways not more than 
four feet in height vertically which lead 
directly to grade and are separated from 
any other use as an egress by one hour 
fire-raied partitions and self-closing doors, 
or; 

3. A combination ofl and 2. 

424.5.4.2 Fire Protective Systems: Fire 
protection systems shall comply with the 
requirements of 780 CMR 424.4.4 and 
424.4.5; additionally in basement or cellar 
use, regardless of building construction type, 
smoke detectors shall be located in the first 
story above the basement or cellar location 
and in any story below grade that may exist 
below the basement or cellar day care 
location. Such smoke detectors shall be 
connected to the day care automatic fire 
detection system. 

424.5.4.3 Common Corridor Exit Access in 
Buildings of Types 1, 2A and 2B 
Construction: In buildings equipped with a 
fire suppression system in conformance with 

780 CMR 9, a common exit access corridor 
shall be acceptable for providing access to two 
means of egress required in 780 CMR 
424.4.1, such common corridors used for 



exitway access may be subdivided, to provide 
separate and independent exitway access by 
using smoke stop partions complying, as 
applicable, with the provisions of 780 CMR 
711.0 for fire partitions. Access through 
interconnected rooms to either side of the 
smoke stop partition, as provided in 780 CMR 
424.4, shall be allowed as a method of 
complying with 780 CMR 424.5.4.3. If the 
doors in the smoke stop partitions are 
normally open, such doors shall be equipped 
with an automatic hold open device, actuated 
by either the building fire protective signaling 
system and/or the building automatic fire 
detection system to close automatically. 

424.5.4.4 1-2 and E use Day Care Centers 
Located in Upper Stories of a Building: In 
new and existing buildings containing 1-2 day 
care occupancies where the day care center is 
located above the first floor, and in new and 
existing buildings containing E use day care 
occupancies and where the day care center is 
located above the third floor, the day care 
center shall meet also the requirements of 
780 CMR 424. 5. 4. 5 thru 780 CMR 424. 5. 4. 7. 

424.5.4.5 Telephone communication: The 
day care center shall have telephones located 
in every occupied room of the day care center 
and directly connected to the building fire 
command center or to a constantly attended 
station within the building, if such exists, or 
otherwise such telephones shall utilize 
standard phone service with such phones 
having the capability of retaining, and upon 
manual selection, automatically dialing the 
emergency number of the fire department 
having jurisdiction. 

424.5.4.6 Alarm requirements: In addition to 
the requirements of 780 CMR 424.4.4 and 
424.4.5, on the floor of the day care center 
and/or the floor below, the operation of any 
water flow device, manual pull station, smoke 
or heat detector will initiate a special 
announcement for the day care center to 
evacuate or proceed to a specific area. The 
language of the announcement shall be 
acceptable to the building official and head of 
the fire department Smoke detectors shall be 
installed on the ceiling of the floor below the 
day care center. Manual pull stations shall be 
required on the floor located below the care 
center. 

424.5.4.7 Areas of refuge: In new and 
existing buildings containing E use care oc- 
cupancies where the day care center is located 
on the fourth through seventh floors, the day 
care center shall have direct access to a sepa- 
rate area which shall have a minimum of two 
hour fireresistance rated construction separa- 
ting it from the rest of the building. The area 
shall adjoin an enclosed stairway with afire 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



resistance rating of at least two hours. The 
area shall be sized at nine square feet per 
person to accommodate the licensed client 
capacity and staff of the day care center. This 
provision shall apply to all centers located on 
the sixth or seventh floors of a building and to 
those centers on the fourth or fifth floors 
whose licensed capacity exceeds 50 clients. 
(Also see Table 424.4.6.) 

780 CMR 425.0 SUMMER CAMPS FOR 
CHILDREN 

425.1 Definition: Summer camps for children 
include premises, operated solely between April 
and October of each year for recreational or other 
purposes, and having residential facilities. The use 
of such accommodations for purposes of 
inspection, certification and inspection fees shall 
be considered as being similar to a dormitory in 
Use Group R-2 and subject to the following 
provisions of 780 CMR 425. 

425.2 New and existing occupancies: 780 CMR 
425.0 shall apply to existing and new summer 
camps for children as defined in 780 CMR 425.1. 

425.3 Means of egress: All one-story, one-room 
buildings having 1,000 square feet or less and 
having 25 occupants or less shall require only one 
means of egress provided that: 

1. the length of travel does not exceed 50 feet 
from any point in the building to the outside at 
grade; and, 

2. the minimum width for aisles and corridors 
shall be three feet 

425.3.1 Emergency escape: Every sleeping room 
shall have at least one exterior door or openable 
window to permit emergency exit or rescue; the 
windows shall conform to the following 
restrictions: 

1. must be openable from the inside without 
the use of separate tools; 

2. the sill height shall not be more than 36 
inches above the finish floor and with a 
maximum six foot drop from the window sill 
to grade below the window; and 

3. provide a minimum net clear opening area 
5. 7 square feet The minimum net clear 
opening height dimension shall be 24 inches. 
The minimum net clear opening width 
dimension shall be 20 inches. 

425.4 Fire protection: Smoke detectors shall be 
required for existing and new residential units in 
accordance with 780 CMR 918.0 (919.0) of 
780 CMR. 

Exception: Tents and other temporary shelters 
which are designed to sleep less than eight 
persons and which have an open side consisting 
of greater than 1/6 of the perimeter of the shelter 



or which have built-in provisions for emergency 
escape 

425.5 Mechanical: If camps are heated, then the 
building must conform to all applicable code 
sections and specialized codes, notwithstanding any 
of the provisions in 780 CMR 425.0. 

425. 6 Enforcement and inspections: Enforcement 
shall be by the local building official who shall 
inspect and certify the summer camps yearly, prior 
to season opening. Fees charged shall be in 
accordance with 780 CMR 

780 CMR 426.0 BULK MERCHANDISING 
RETAIL BUILDINGS 

426.1 General: Bulk Merchandising Retail 
Buildings have different fire and life safety risks 
than traditional retail buildings. This difference 
requires special attention to fire protection and life 
safety. The purpose of 780 CMR 426.0 is to 
provide standards to adequately deal with these 
differences, and to reduce the risk of life loss, 
injury, and excessive property damage from fire. 

426.2 Scope: The provisions of 780 CMR 426.0 
shall apply to buildings or structures defined 
herein as Bulk Merchandising Retail Buildings or 
portions thereof containing high piled combustible 
storage as defined in 780 CMR 426.2. L Unless 
otherwise noted in 780 CMR 426.0, the 
requirements for Bulk Merchandising Retail 
Buildings shall be in accordance with the 
requirements set forth for Use Group M, 
Mercantile as defined in 780 CMR 309.0 or 
780 CMR 41 70 (if applicable). 

426.2.1 Definitions: Terms used in 780 CMR 
426.0 shall have the following meanings: 

Aerosol: A product that is dispensed from a metal 
can, up to a maximum size of 33.8 fl oz (1000 
ml) or a glass or plastic bottle, up to a maximum 
size of four fl oz (118 ml) that is designed and 
intended to dispense an aerosol by a propellant 
Aerosols shall be classified by means of the 
calculation of their chemical heats of 
combustion and shall he designated Level 1, 
Level 2, or Level 3 in accordance with Table 
426.2. 

Table 426.2 
AEROSOL CLASSIFICATION 



Chemical Heat of Combustion 



0-8,600 BTU/lh (0-20 kj/g) 

8,600-13,000 BTU/lb (20-30 kJ/g) 

13.000 nr fp-eater RTU/lh (30 or fn-eater Ll/aJ 



Aerosol 
Level 



Group A Plastics: Products that utilize plastic, or 
non plastic products that utilize significant 



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plastic packaging materials, that have a high 
BTU content; ABS (acrylonitrile-butadiene- 
styrene copolymer), Aceial (polyformaldehyde), 
Acrylic (polymethyl methacrylate). Butyl rubber, 
EPDM (ethylene-propylene rubber), FRP 
(fiberglass reinforced polyester). Natural rubber 
(expanded), Nitrile rubber (acrylonitrile- 
butadiene rubber), PET or PETE (polyethylene 
terephthalate), Polybutadiene, Polycarbonate, 
Polyester elastomer, Polyethylene, 
Polypropylene, Polystyrene (expanded and 
unexpanded), Polyurethane (expanded and 
unexpanded), PVC (polyvinyl chloride greater 
than 15% plasticized, e.g., coated fabric 
unsupported film), SAN (styrene acrylonitrile), 
SBR (styrene-butadiene rubber). 

Bulk Merchandising Retail Buildings: A building 
where sales areas contain high piled combustible 
commodities, or high piled, high hazard 
commodities as defined by 780 CMR 4 and 
780 CMR 3. 

Combustible Liquids: Any liquids having a 
flashpoint at or above 100 °F (38 "C) shall be 
known as Class II or III liquids. Combustible 
liquids shall be divided into the following 
classification: 

Class II - Liquids with a flash point at or above 
100 °F (37.8 "Q and below 140 °F (60 "C). 
Class III-A - Liquids with a flash point at or 
above 140 "F (60 "Q and below 200 °F (93.3 °C). 
Class III-B - Liquids with a flash point at or 
above 200 °F (93.3 "Q. 

Control Area: Is a buihSng or portion of a building 
within which the exempted amounts of 
hazardous materials are allowed to be stored, 
dispensed, used, or handled 

Corrosive: A chemical that causes visible 
destruction of, or irreversible alterations in 
tissue by chemical action at the /site of contact 
A chemical is considered to be a corrosive if, 
when tested on the intact skin of albino rabbits 
by the method described in Appendix A ofCFR 
49, Part 1 73, it destroys or changes irreversibly 
the structure of the tissue at the site of contact 
following an exposure period of four hours. 
This term does not refer to action on inanimate 
surfaces. [Source: Uniform Fire Code] 

Flammable Liquids: Any liquids having a flash 
point below 100 °F (38 °C), and having a vapor 
pressure not exceeding 40 psia (276 kPa) at 
100 'F (38 °Q. Flammable liquids shall be 
known as Class I liquids and shall be divided 
into the following classification: 
I- A Liquid - A liquid with a flash point below 
73 °F (22.8 °Q and a boiling point below 100 °F 
(37.8 "C). 



I-B Liquid - A liquid with a flash point below 
73 °F (22.8 °C) and a boiling point at or above 
100 "F (37.8 "C). 

I-C Liquid - A liquid with a flash point at or 
above 73 "F (22.8 °Q and below 100 °F (378 "C). 

High Piled Combustible Commodity: Storage of 
combustible materials in piles greater than 12 
feet (3.658 m) in height or combustible materials 
on pallets, in racks or on shelves where the top 
of storage is greater than 12 feet (3.658 m) in 
height 

High Piled, High Hazard Commodity: Storage of 
combustible materials such as rubber tires, 
Group A plastics, flammable liquids, idle pallets 
and commodities with similar heat release 
characteristics where the top of storage is 
greater than six feet (1.829 m) in height 

Highly Toxic: Material which produces a lethal 
dose or lethal concentration which falls within 
any of the following categories. 

1. A chemical or substance that has a median 
lethal dose (LD50) of 50 milligrams or less per 
kilograms of body weight when administered 
orally to albino rats weighing between 200 and 
300 grams each. 

2. A chemical or substance that has a median 
lethal dosage of more than 200 milligrams or 
less per kilogram of body weight when 
administered by continuous contact for 24 
hours, or less if death occurs within 24 hours, 
with bare skin of albino rabbits weighing 
between two and three kilograms each. 

3. A chemical or substance that has a median 
lethal concentration (LC50) in air of 200 parts 
per million by volume of gas or vapor, or two 
milligrams per liter or less of mist, fume or dust, 
when administered by continuous inhalation for 
one hour, or less if death occurs within one 
hour, to albino rats weighing between 200 and 
300 grams each. 

Mixtures of these materials with ordinary 
materials, such as water, might not warrant 
classification as highly toxic. While this system 
is basically simple in application, any hazard 
evaluation which is required for the precise 
categorization of this type of material shall be 
performed by experienced, technically competent 
persons. 

Oxidizer: A chemical other than a blasting agent 
or explosive that initiates or promotes 
combustion in other materials, thereby causing 
fire either of itself or through the release of 
oxygen or other gases. 

Class 1: An oxidizer whose primary hazard is a 
slight increase in the burning rate but which 
does not cause spontaneous ignition when the 



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SPECIAL USE AND OCCUPANCY 



oxidizer conies in contact with combustible 
materials. 

Class 2: An oxidizer thai will cause a moderate 
increase in the bunting rate or that is capable of 
causing spontaneous ignition of combustible 
materials with which the oxidizer comes in 
contact 

Class 3: An oxidizer that will cause a severe 
increase in the burning rate of combustible 
materials with which the oxidizer comes in 
contact or that will undergo vigorous self- 
sustained decomposition due to contamination 
or exposure to heat 

Class 4: An oxidizer that is capable of an 
explosive reaction due to contamination or 
exposure to thermal or physical shock. 
Additionally, the oxidizer will enhance the 
burning rate and is capable of causing 
spontaneous ignition of combustibles. [Source: 
BOCA] 

Rack Storage: Combination of vertical, horizontal 
and diagonal members that support stored 
materials in fixed or portable racks. 

Shelf Storage: Storage on structures less than 30 
in. (76.2 cm) deep with shelves usually two ft 
(0.6 m) apart vertically and separated by 
approximately 30 in. (76.2 cm) aisles. 

Toxics: A material which produces a lethal dose or 
lethal concentration within any of the following 
categories: 

1. A chemical or substance that has a median 
lethal dose (LDSO) of more than SO milligrams 
per kilograms but not more than 500 milligrams 
per kilograms of body weight when administered 
orally to albino rats weighing between 200 and 
300 grams each. 

2. A chemical or substance that has a median 
lethal dosage of more than 200 milligrams per 
kilogram but not more than 1, 000 milligrams per 
kilogram of body weight when administered by 
continuous contact for 24 hours , or less if death 



occurs within 24 hours, with bare skin of albino 
rabbits weighing between 2 and 3 kilograms 
each. 

3. A chemical or substance that has a median 
lethal concentration (LC50) in air more than 
200 parts per million but not more than 2,000 
parts per million by volume of gas or vapor, or 
more than two milligrams per liter but not more 
than 20 milligrams per liter of mist, fume or 
dust, when administered by continuous 
inhalation for one hour, or less if death occurs 
within one hour, to albino rats weighing between 
200 and 300 grams each. 

Unstable (Reactive): A chemical which in the pure 
state, or as produced or transported, will 
vigorously polymerize, decompose, condense or 
become self-reactive under conditions of shock, 
pressure or temperature 

Water Reactive Material: Material which explodes; 

violently reacts; produces flammable, toxic or 

other hazardous gases; or evolves enough heat 

to cause self-ignition or ignition of nearby 

combustibles upon exposure to water or 

moisture 

4263 Commodity Classification: Commodities in 

storage and display shall be classified in 

accordance with the following NFPA Standards as 

listed in Appendix A 

13: Installation of Sprinkler Systems 

30: Flammable and Combustible Liquids Code 

30B: Aerosol Products, Manufacture and 

Storage 

231: General Storage 

23 IC: Rack Storage of Materials 

23 ID: Storage of Rubber Tire 

430: Storage of Liquid and Solid Oxidizers 

426.4 Fire Protection Requirements: Fire 
protection requirements shall be in accordance 
with Table 426.4. 



Table 426.4. 
FIRE PROTECTION REQUIREMENTS 





SizeofHigh- 
PUed Display 

Area (sqft) , 
X 0.0929 form 


Fire Protection Requirements 




Class' 


Fire Suppression 

System 
(780 CMR 426.5) 


ru-e 
Alarm/Notification 
(780 CMR 426.14) 


Fire Department 

Access Doors 
(780 CMR 426.8) 


Hose Connections 
(780 CMR 426.7) 


Manual Smoke 
and Heat Vents 
(780 CMR 426.16 




0-2,500 


NR 


NR 


NR 


NR 


NR 


I-IV 


2,501 - 12,000 


Yes 


NR 


NR 


NR 


NR 




over 12,000 


Yes 


Yes 


Yes 


Yes 


Yes 




0-500 


NR 


NR 


NR 


NR 


NR 


High 


501-2,500 


Yes 


NR 


NR 


NR 


NR 


Hazard 


2,501 - 12,000 


Yes 


NR 


Yes 


Yes 


NR 




1 oy<^ 12M0 1 


Yes 


Y£S. , 


Yes 


Yes 


Yes 



NR = Not required 

1. For commodity classifications definitions, see 426.3. 



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101 



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2. Areas that are separated by 60 ft of display area with such areas not used for high piled storage, or that are 
separated with a one-hour Jireresistance-rated separation barrier, can be considered as separated high piled areas. 

3. If the buimng is required to be sprinklered under 780 CMR, then the sprinkler system protecting the high piled 
storage area and 15 ft beyond shall be designed in accordance with the appropriate NFPA Standard(s). 



426.5 Fire Suppression Systems: Fire sprinkler 
design and installation shall be provided in 
accordance with the applicable requirements set 
forth by NFPA 13, 30, 30B, 231, 231C, 23 ID, 430, 
as listed in Appendix A, or other nationally 
recognized codes and standards, or tests conducted 
in test laboratories as defined in 527 CMR 49.03, 
Appendix C as listed in Appendix A. 

426. 6 Stance Arrangement: Storage arrangements 
for fire protection purposes shall comply with 
requirements set forth by NFPA 13, 30, SOB, 231, 
23 IQ 23 ID, 430, as listed in Appendix A, or other 
nationally recognized codes and standards, or tests 
conducted in test laboratories as defined in 527 
CMR 49. 03, Appendix C, as listed in Appendix A. 

426. 7 Hose Connections: A Class I automatic, 
wet-standpipe system shall be provided in 
accordance with NFPA 14. Hose connections shall 
be located around the interior perimeter of the 
building within five ft of all required fire 
department access doors, adjacent to the latch side 
of the door. Hose connections shall be installed to 
accommodate 200 ft of travel distance to any point 
in the building. Where the most remote portion of 
the building exceeds 200 ft of travel distance from 
the required access doors, additional hose 
connections shall be provided in locations 
approved by the head of the fire department Hose 
connections shall be readily accessible and marked 
for fire department use only. When approved by 
the head of the fire department, the following 
exceptions shall be permitted 

Exception 1: Hose connections may be omitted 
when the following fire department building 
access and fire hydrant coverage is provided: 
minimum 18 ft wide, unobstructed access 
roadways located within 20 ft of the building on 
at least three sides; minimum ten ft wide, 
unobstructed access route between the access 
roadway and the fire department access doors; 
and, fire hydrants in locations approved by the 
head of the fire department 

Exception 2: In lieu of a Class I standpipe 
system, a Class II automatic, wet-standpipe 
system in accordance with NFPA 14 shall be 
permitted when the following fire department 
building access and fire hydrant coverage is 
provided: minimum 18 ft wide, unobstructed 
access roadways located within 50 ft of the 
building on at least three sides; minimum ten ft 
wide, unobstructed access route between the 
access roadway and the fire department access 
doors; and, fire hydrants in locations approved 
by the head of the fire department The hose 



connections shall be located as described above 
for the Class I standpipe system. Occupant hose 
shall not be required, and the hose connections 
shall be marked for fire department use only. 

426.8 Fire Department Access Door: Fire 
department access doors shall be provided for fire 
department emergency access. Access doors shall 
be: 

1. located adjacent to fire department access 
roadways, 

2. provided with an approved exterior fire 
department accessible key cylinder operable lock 
device, 

3. provided with approved fire department 
identification signs, and 

4. provided such that all points of the floor 
area are accessible within 200 feet of travel 
distance. 

Fire department access doors may be used as 
occupant egress doors. 

426.9 Fire Department Access Roadways: Fire 
department access roadways shall be provided on at 
least two sides of the building with such access to 
be approved by the head of the fire department 
prior to any construction. Fire hydrants shall be 
provided in locations approved by the head of the 
fire department 

426.10 Means of Egress: Means of egress shall be 
in accordance with the requirements set forth in 
780 CMR 10 for Use Group M, Mercantile unless 
otherwise modified herein: 

Exception: Exit access travel distance shall be 
limited to 200 feet 

If the only means of customer entrance is through 
one exterior wall of the building, two thirds of the 
required egress width shall be located in this wall 
At least one half of the required exits shall be 
located so as to be reached without passing through 
checkout stands. In no case shall checkout stands 
or associated railings or barriers obstruct exits, 
required aisles, or approaches thereto. 

426.11 Flammable/Combustible Liquids: The 
display, storage, protection, and maximum 
allowable quantities offlammable and combustible 
liquids permitted in mercantile display areas shall 
be in accordance with NFPA 30, as listed in 
Appendix A 

426.12 Aerosols: The display, storage, protection, 
and maximum allowable quantities of aerosols 
permitted in mercantile occupancies shall be in 
accordance with of NFPA 30B. 



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780 CMR; STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



Table 426.13. 
DENSITY FACTOR FOR HAZARDOUS MA TERIALS EXEMPTION CALCULATIONS 


Material 


Class 


Solids pounds 
(cubicfeet) 


Liquid gallons 
(pounds) 


Gas cubicfeet 






x 0.4536 for kg 
(x 28.32 for liters) 


x3.7S for liters 
(x 0.4536 for kg) 


X 28.32 for liters 


Oxidizers 


4 
3 

2 

1 


Not permitted 
0.75 
1.5 
12 


Not Permitted 
(0.75) 
(1-5) 
(12) 


Not Permitted 

112.5 

9 

4.5 


Unstable (reactive) 


4 
3 

2 

1 


Not Permitted 

0.375 

0.3 

Unlimited 


Not Permitted 

(0.375) 

(0.3) 

Unlimited 


Not Permitted 
3.75 
1.5 
2.25 


Toxics 


AU 


0.65 


(0.65) 


1.053 


Corrosives 


AU 


6.5 


0.65 


1.053 


Highly Toxic 


AU 


0.0013 


(0.0013) 


0.026 


Water Reactive 


3 

2 

1 


0.375 

0.3 
0.375 


(0.0375) 

(0.3) 
fO.375) 


Not Applicable 



1. Quantities may be increased by 100% in sprinklered buildings 



426.13 Non-flammable and non-combustible 
hazardous materials: Non-flammable and non- 
combustible hazardous materials such as: 
Oxidizers, Unstable Materials, Toxics, Highly 
Toxics, Corrosives, and Water Reactives shall meet 
thefi)llowing requirements: 

Q = FxA 

where: 

Q = the maximum quantity in a single control 

area for mercantile display. 

F = the density factor as indicated in Table 

426.13. 

A = the area occupied for mercantile display. 

For computation purposes, the area shall not 

exceed 1,500 square feet (139.39 m^) per control 



426.14 Fire Alarm or Notification Systems: Either 
a fire alarm system or emergency notification 
system, as described below and approved by the 
head of the fire department, shall be provided: 
I. Fire Alarm System: The fire alarm system 
shall include the following: 

a A fire alarm system required for life safety 
shall be installed, tested, and maintained in 
accordance with applicable requirements of 
NFPA 70 and 72, as listed in Appendix A 

b. All systems and components shall be 
approved for the purpose for which installed, 
and all installation wiring or other 
transmission paths shall be monitored for 
integrity in accordance with NFPA 72, as 
listed in Appendix A. 

c. Manual fire alarm stations shall be 
provided in the natural path of escape near 
each required exit from an area. Each 
manual fire alarm station shall be accessible, 
unobstructed, visible, and of the same general 
type. 



d Notification signals for occupants to 
evacuate shall be by audible and visible 
signals in accordance with NFPA 72 and 
CABO/ANSI A117.1, as listed in Appendix A. 
The general evacuation alarm signal shall 
operate throughout the entire building, 
e. The fire alarm system shall be arranged to 
transmit the alarm automatically via any of 
the following means acceptable to head of the 
fire department and in accordance with 
NFPA 72: 

L Auxiliary Alarm System 

iL Central Station Connection 

HL Proprietary System, or 

iv. Remote Station Connection, 
f The fire alarm control panel location shall 
be located in an area acceptable to the head 
of the fire department Where required, a 
remote annunciator shall be located in an 
area acceptable to the head of the fire 
department 

g. Other control systems intended to make 
the protected premises safer for building 
occupants including, but not limited to, duct 
smoke detectors, fire/smoke dampers, smoke 
management systems, fire door controls, shall 
be installed and monitored for integrity in 
accordance with NFPA 72, as listed in 
Appendix A, and a distinctive supervisory 
signal shall be provided to indicate a 
condition that would impair the satisfactory 
operation of the equipment 
h. Supervisory attachments including, but 
not limited to, control valves, fire pump 
running conditions, float valves, shall be 
installed and monitored for integrity in 
accordance with NFPA 72 as lisetd in 
Appendix A, and a distinctive supervisory 
signal shall be provided to indicate a 



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condition that would impair the satisfactory 
operation of the equipment 
L All building HVACfans shall be arranged 
to automatically shut down on any general 
alarm condition. Duct smoke detectors shall 
not be required 

j. Waterflow initiating devices shall be 

arranged to initiate an alarm condition within 

one minute of being activated In addition, 

provisions shall be made to control and 

prevent false alarms due to water surges. 

2. Emergency Notification System: During a 

fire emergency, the emergency notification 

system shall sound an audible alarm in a 

continuously attended location for the purpose 

of initiating the evacuation plan required under 

780 CMR 426. 15. 

426.15 Evacuation Planning and Training: An 
evacuation plan shall be submitted at the time of 
application for a building permit as part of the 
required documentation pursuant to 780 CMR 1. 
The Certificate of Use: and Occupancy shall not be 
issued until the evacuation plan has been reviewed 
and approved by the head of the fire department 
Any changes to the evacuation plan shall not be 
effected until a revised plan has been submitted to 
and approved by the head of the fire department 
The evacuation plan shall detail procedures, define 
roles and responsibilities of employees, and shall 
include an egress plan indicating routes of travel to 
all exits. The evacuation plan shall be used to 
ensure the safe evacuation of all customers and 
employees. All employees shall be instructed and 
periodically trained with respect to their duties, as 
required by 527 CMR 10.25, as listed in 
Appendix A. 

426.16 Smoke and Heat Venting: Adequate 
methods of manual heat and smoke venting shall 
be provided The method of operation, vent area, 
spacing layout, construction of vents and curtain 
boards or other acceptable means of addressing 
methods of heat and smoke venting shall be 
determined by an engineering evaluation and 
analysis. The analysis shall be reviewed and 
approved by the head of the fire department and 
shall contain sufficient detail to evaluate the 
hazard and effectiveness of the venting system. 

780 CMR 427.0 LIMITED GROUP 
RESIDENCE 
427.1 General: A building licensed by or operated 
by the Department of Mental Health or the Office 
for Children, Commonwealth of Massachusetts as 
a limited group residence: this is a special 
residence to include residents not capable 
self-preservation. 

427.1.1 Scope: A limited group residence shall 
have a maximum of 12 residents who are at least 
four years of age. Not more than four of the 



residents shall be impaired; provided, howe\>er, 
that more than four such residents may be 
impaired if the structure complies with 780 CMR 
427.2. A limited group residence shall be 
classified in the R-5 use category for code 
purposes. 

427. 1. 1. 1 Department of Mental Retardation 
(DMR) Group Homes: 780 CMR 427. shall 
not apply to premises operated or licensed by 
the Department of Mental Retardation (DMR) 
pursuant to 115 CMR 7. 00 and 8. 00, upon the 
completion of a DMR safety assessment for 
each individual and an approved safety plan 
for each location where services and supports 
are provided Such premises shall be treated 
as conventional R-4, R-3, R-2 andR-1 use as 
applicable 

427.1.2 Definitions: The following terms shall 
have the meaning indicated for the purpose of 
780 CMR 427.0: 

Existing building or structure: Any completed 
building or structure which has been legally 
occupied and/or legally used for a period of at 
least five years. Structures which fail to 
qualify with this definition shall comply with 
780 CMR 427.2. 

Resident: A client in need of care who resides in 
the limited group residence of the Uqensing or 
operation agency. Staff are not considered as 
residents under the provisions of 780 CMR 
427. ft The licensing agency shall classify all 
residents in one of the following three 
categories: 

Impaired: All residents not capable of 
self-preservation through physical, mental 
and/or developmental disability and requiring 
physical assistance to exit the bulling. All 
residents under seven years of age shall be 
classified as impaired 

Partially impaired: All residents physically, 
mentally and/or developmentally disabled but 
capable of exiting the limited group residence 
with either supervision and/or instruction 
without any physical assistance. 
Unimpaired: All residents capable of exiting 
the building without physical assistance 
and/or supervision or instruction by staff 
personnel and capable of negotiating any 
exitway of the limited group residence. 

427.1.3 Application of building code and 
reference: Except as may otherwise be 
specifically provided for in 780 CMR 427.0, the 
Massachusetts State Building Code shall apply 
in its entirety. 

Exception: Chapter 34 shall not apply. 

427.1.4 Mixed use occupancy: A limited group 
residence shall not be housed in a building used 



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SPECIAL USE AND OCCUPANCY 



for any occupancy other than a limited group 

residence. 

Exception: Dwelling unit(s) meeting the 
requirements of 780 CMR 427.0 may be 
incorporated within a building in residential 
use provided unit separation walls and 
floor-ceiling assemblies shall serve to 
completely separate the limited group 
residence and provided that one of the limited 
group residence exitways is separate from the 
other uses. 

427.1.5 Plans and specifications: Plans shall be 
filed with the building official having 
jurisdiction in accordance with 780 CMR 110.0 
for any building to be constructed as, or altered 
for use as, a limited group residence under 

780 CMR 4270. 

427.1.6 Temporary certificate of occupancy: 
Upon satisfactory compliance with the code 
sections pertaining to building requirements, the 
building official shall issue a temporary 
certificate of occupancy in accordance with 
780 CMR 120.3 for a period not to exceed 90 
days. This temporary certificate of occupancy 
specifically prohibits residents as defined in 
780 CMR 427.1.2 from inhabiting the building 
overnight until the building official issues the 
certificate of occupancy under 780 CMR 
4271.8. 

427.1.7 Rules and regulations of the licensing or 
operating agency pertaining to and including, 
but not limited to, smoking regulations, staffing 
ratios, and resident classifications shall be 
provided to the building official by the licensing 
or operating agency prior to the issuance of a 
certificate of occupancy. 

427.1.8 Certificate of occupancy: Certificates of 
occupancy shall only be issued when a license, if 
appropriate, and an affidavit from the 
Department of Mental Health or the Office for 
Children, Commonwealth of Massachusetts, 
have been accepted by the building official 
attesting to the satisfactory compliance with the 
applicable rules and regulations referenced in 
780 CMR 4271.7 

427.1.9 Certificate of inspection: Certificates of 
inspection shall be issued by the building official 
in accordance with 780 CMR 106.0 and Table 
106. 

427.1.10 Failure to comply: The building official 
immediately upon being informed by written 
report or otherwise that a building or structure 
or anything attached thereto or connected 
therewith is being occupied in violation of 
780 CMR may revoke or suspend any permit, 
license, certificate or other permission regulated 
by 780 CMR and granted by him, and no such 
building or structure shall be continued to be 



operated after such revocation or suspension. 
Such revocation or suspension shall not 
preclude the bulling official from instituting 
appropriate action in accordance with 780 CMR 
118.0. 

427.2 New structures: All new structures shall be 
constructed, equipped, and maintained to the 
requirements of the One- and Two-Family 
Dwelling Code and 780 CMR 427.0, shall be 
limited to two stories in height, and shall have 
dwelling unit(s) limited to one story in height with 
direct access to grade without steps or changes in 
elevation other than ramps in accordance with 
780 CMR 11. Corridors shall be of one hour fire 
resistive construction. 

427.2.1 Other requirements: New structures 
shall also satisfy the general requirements 
contained in 780 CMR 427.1 and 427.3. 

427.3 Existing structures: Existing structures of 
any construction up to three stories or 40 feet in 
height may be converted and used for limited group 
residence occupancies. All residents classified as 
impaired as defined in 780 CMR 427.1.2 are 
restricted to those stories having direct access to 
grade without steps or changes in elevation other 
than ramps in accordance with 780 CMR 11. 

427.3.1 Third-story utilization: The third story of 
buildings permitted by 780 CMR 427.3 may be 
only occupied by staff. Other use of the third 
story is restricted to heating, ventilation units 
and ordinary storage. All doors leading to non- 
resident areas shall be maintained locked 

427.3.2 Vertical openings: Openings to such 
spaces as laundry chutes, dumb-waiters, heating 
plenums or combustible concealed spaces shall 
be permanently blocked with one hour 
fireresistance-rated construction, in accordance 
with the provisions of 780 CMR 7, unless such 
installation is in compliance with the pertinent 
provisions of other sections of 780 CMR. 

427.3.Z1 Firestopping and draftstopping: 
Firestopping and draftstopping shall be 
provided in accordance with 780 CMR 720. 
and the One- and Two-Family Dwelling Code 
or as approved by the building official 

427.3.3 Exitway Detmls: 

427.3.3.1 Corridor width: The minimum clear 
width of an exitway access corridor shall be 
threefeet 

Exception: In new structures the minimum 
clear width shall be four feet 

427.3.3.2 Dead ends: In no case shall dead 
end corridors exceed 30 feet Existing dead 
end corridors, wherever possible, shall he 
altered so that exitways shall be accessible in 
at least two different directions from all points 
in corridors. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



427.3.3.3 Corridor walls: Corridor walls that 
separate use areas from exitway access 
corridors shall be of construction that will 
resist the passage of smoke. 

Exception: Existing openings to 
congregate living areas, other than 
kitchens, shall be allowed to remain open. 

427.3.3.4 Sleeping room doors: All sleeping 
room doors shall be of construction that will 
resist the passage of smoke. All doors shall be 
equipped with approved positive latching 
hardware and approved self-closing devices. 

Exceptions: 

1. Sleeping room doors may be equipped 
with approved hold-open smoke activated 
devices in accordance with 780 CMR 
1017.0. 

2. Hollow core doors shall not be 
permitted 

427.3.3.5 Means of Egress: All habitable 
floors shall be provided with at least two 
means of egress, located as remote as 
practicable from one another. Exitways shall 
be located to provide a safe path of travel to a 
public way without traversing any corridor or 
space exposed to an unprotected open 
stairway. 

Exceptions: 

1. Open stairs may be used as one of the 
required means of egress when permitted 
by 780 CMR 427.3.3.6, Exception 3. 
However, in no case may both required 
means of egress traverse the unprotected 
open space. 

2. Access to one of the required exitways 
on sleeping room floors may be through 
adjoining rooms. 

427.3.3.6 Interior exitway stairs: Every story 
shall be provide with at least one enclosed 
interior stairway which discharge directly to 
grade or through a grade passageway to a 
public way. The enclosed interior stairway(s) 
shall be of construction having a minimum 
fireresistance rating of one hour, properly 
firestopped Spaces below the stairway(s) 
shall be enclosed to maintain the integrity of 
the one hour fireresistive construction of the 
stairway enclosure. Stairway(s) openings 
shall be protected by at least Class "B" label 
one hour fire door assemblies. 

New stair construction shall comply with 
780 CMR 1014.0. Existing stairs shall 
comply with the One- and Two-Family 
Dwelling Code or as approved by the building 
official 

Exceptions: 

1. Secondary stairs not considered an 
exitway component may have door 
openings protected by a minimum 1 % inch 
solid bonded wood core doors or 



equivalent; however, such doors shall be 
equipped with approved automatic positive 
latching hardware and approved 
self-closing devices. 

2. Basement/cellar: Stairway(s) shall be 
separated from the first floor by a 20 
minute fire rated, self-closing door or 
equivalent 

3. One stairway may be allowed to remain 
unenclosed to preserve functional and 
aesthetic requirements. 

427.3.3.7 Door widths: No single egress door 
in a doorway shall be less than 28 inches 
wide 

Exceptions: 

1. Exitway door leaves shall not be less 
than 34 inches wide. 

2. Door leaves to resident bedrooms 
occupied by residents who are classified as 
"Impaired" shall not be less than 34 
inches wide. 

427.3.3.8 Basement/cellar: Basements/cellars 
shall be provided with at least two acceptable 
exitways, one of which shall discharge 
directly to the outside of the building. 

Exception: Basement/Cellar areas with 
only one existing entrance from the outside 
only, and used solely as a mechanical 
space shall be permitted to maintain only 
one doorway which shall be maintained 
locked as an entrance/exitway. 

427.3.3.9 Emergency escape: All sleeping 
rooms shall have at least one openable 
window or exterior door to permit smoke 
control, emergency escape, or rescue A 
required door or window must be openable 
from the inside without the use of separate 
took, and shall comply with 780 CMR 1010.4. 

427.3.3.10 Means of egress lighting: Means 
of egress lighting systems shall be provided in 
accordance with 780 CMR 1024.0. 

427.3.3.11 Locks: Locks installed in resident 
sleeping room doors shall be so arranged that 
they can be locked from the corridor side. All 
such locks shall be arranged to permit exit 
from the room by a simple operation without 
the use of a key. Double cylinder dead bolts 
requiring key operation on both sides are 
prohibited throughout this occupancy. 

427.3.4 Interior finish: The flame spread of 
interior finish shall be limited to Class II in 
exitways or exit access corridors. Rooms shall 
be permitted to have interior finish of a Class HI 
flame spread Floor coverings shall conform to 
the requirements of 780 CMR 805. except that 
carpet type fioor coverings shall possess a 
critical radiant flux of 0.22 w/cni or greater. 

427.3.5 Fire suppression systems: Automatic fire 
suppression systems shall be provided and 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



installed in accordance with NFiPA Standard 
No. 13D. 

Additions: 

1. Exceptions listed in NFiPA Standard No. 
13D applicable to dwellings shall not apply. 

2. A water flow detector, connected to the 
fire alarm system, shall be provided. 

3. NFiPA Standard No. 13D, Sections 4 
through 6; Exception 1 shall not apply. 

4. The control valve(s) shall be secured in 
the open position. 

427.3.6 Fire alarm system: A manual fire alarm 
system shall be provided and installed in 
accordance with 780 CMR 917.0 and specifically 
NFiPA Standard No. 72 as listed in Appendix A. 

427.3.7 Automatic protection alarm system: 
Approved smoke detectors shall be installed in 
accordance with 780 CMR 918.0 and specifically 
NFiPA Standard No. 72 as listed in Appendix A 
in the following locations: 

1. exitway access corridors not more than 30 
feet on center; 

2. congregate living areas other than 
kitchens; 

3. at least one detector in all basement/cellar 
areas; and 

4. all sleeping rooms. 

Exception: Smoke detectors used in 
combination with automatic closing 
devices may be substituted in each area 
aforementioned for the protection herein 
required. 

427.3.8 Supervision: All automatic and manual 
fire alarm systems shall be supervised in 
accordance with 780 CMR 923.1 or 923.2 

427.3.9 Heating devices: Portable comfort 
heating devices and solid fuel burning 
appliances are prohibited. Any heating device, 
other than a central heating plant, shall be so 
designed and installed that combustible material 
will not be ignited by it or its appurtenances. If 
fuel-fired, such heating devices shall be chimney 
or vent connected, shall take air for combustion 
directly from the outside, and shall be so 
designed and installed to provide for complete 
separation at the combustion system from the 
atmosphere of the occupied area. The heating 
system shall have safety devices to immediately 
stop the flow of fuel and shut down the 
equipment in case of either excessive 
temperature or ignition failure. 

Exceptions: 

1. Approved suspended unit heaters may be 
used in locations other than means of egress 
and sleeping areas, provided such heaters are 



located high enough to be out of the reach of 
persons using the area and provided they are 
equipped with the safety devices specified in 
780 CMR 427.3.9. 

2. Fireplaces which comply with 780 CMR 
2114.0 may be used only in areas other than 
resident sleeping rooms. The fireplaces shall 
be equipped with a heat tempered glass 
fireplace enclosure guaranteed against 
breakage up to a temperature of 650 °F. A 
lock on the enclosure shall be required. 

427.3.10 Fire drills: The licensing or operating 
agency shall require that fire drills be held with 
sufficient frequency so as to familiarize all 
residents and staff personnel with emergency 
procedures. Drills shall be held at unexpected 
times under varying conditions to simulate the 
unpredictable conditions which may occur in 
case of fire, including blocking of any point of 
any means or egress. 

427.3.10.1 Log: A log shall be kept of all fire 
drills and shall be available for inspection 
and duplication by the building official, fire 
official, and other parties having jurisdiction. 

427.3.10.2 The resident manager shall record 
in said log the names of any authorized 
inspectors who may have been present and 
the names or identifying numbers of the 
residents who participated 

780 CMR 428,0 DETOXIFICATION 
FACILITIES 

428.1 General: A detoxification facility is a facility 
licensed or operated by the Department of Public 
Health, Division of Alcoholism in accordance with 
the Rules and Regulations for Detoxification 
Facilities issued by the Department of Public 
Health, Division of Alcoholism, Commonwealth of 
Massachusetts, and shall be used to treat 
individuals acceptable to the program in 
accordance with those Rules and Regulations. 

428.2 Scope: Detoxification facilities shall be 
subject to the requirements of 780 CMR 428.0 for 
new and existing buildings which are to be used or 
operated as licensed facilities. 780 CMR 428.0 
shall establish the requirements applicable to such 
facilities. Where specific reference is made to other 
sections of 780 CMR, to reference standards or 
other regulations, those requirements cited shall 
apply. Where no reference is specifically made, 
780 CMR, including 780 CMR 34, shall apply. 

428.3 Classification of Residents: All residents 
enrolled in the detoxification program shall be 
identified according to one of the following 



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THE MASSACHUSETTS STATE BUILDING CODE 



classifications when evaluated by the facility 
personnel in accordance with the Rules and 
Regulations for Detoxification Facilities of the 
Division of Alcoholism of the Department of Public 
Health: 

1. Impaired 

2. Partially Impaired 

3. Unimpaired 

425.4 Defim&ons: The following terms shall have 
the meaning indicated for the purpose of 780 CMR 
428.0 only: 

Impaired: Anyone who will require assistance to 
egress the building 

Partially Impaired: Anyone who may require 
assistance to egress the building. 

Unimpaired: Anyone who appears able to egress 
the building without assistance. 

425.5 Use group classification: DetOMfication 
facilities licensed and approved in accordance with 
these provisions shall be classified in the R-1 use 
group. 

428.6 Mixed use occupancy: A portion of a 
building may be used for a detoxifiication facility 
provided that it is completely separated from the 
rest of the building by both horizontal and vertical 
fire separation assemblies of at least one hour 
fireresistance rating. 

Exception: Detoxification facilities shall not be 
located in buildings in which any of the 
following use groups are located: A-2, F, H, or 
S-1. 

428.7 Submission of plans: Plans shall be filed 
with the building official in accordance with 
780 CMR 110. Ofor any building to be constructed 
as, or altered for use as, a detoxification facility 
under 780 CMR 428.0. The plans shall also 
identify those rooms which comply with 780 CMR 
428. Ofor use by the impaired 

4288 Inspection and certification: The building 
official shall inspect and certify detoxification 
facilities once every two years. Fees shall be 
applied in accordance with Table 106 for the R-1 
Use Group. 

428.9 Resident location limitations: In buildings 
used as detoxification facilities in accordance with 
780 CMR 4280, resident locations shall be limited 
according to the use and type of construction as 
provided in Table 428.9. All heights are in stories 
above grade. All buildings used as detoxification 
facilities in accordance with 780 CMR 4280 shall 
be accessible to the Fire Department wherever 
escape windows are required. 



Table 428.9 

RESIDENT SLEEPING ROOM LOCATION 

UMITATIONFOR DIFFERENT TYPES OF 

CONSTRUCTION 



Classification 
of Resident 


Type of Building Construction 




lA 


IB 


2A 


23 


2C 


3A 


3B 


4 


SA 


SB 


Impaired 


No 
limit 


8st 


4 
sL 


2 

St 


1 

St 


2 

St 


1 

St 


2 

St 


1 

St 


1 

St 


Partially 
impaired 


No 
limit 


No 
limit 


8 
sL 


3 

St 


1 

St 


3 

St 


2 

St 


3 

St 


2 

St 


I 

St 


Unimpaired 


No 
limit 


No 
UmM. 


9 


4 


3 


4 


3 

IL. 


4 
SL. 


3 


2 



Note: * Impaired sleeping rooms in SB construction 
require other fitU building sprinklering or one hour fire 
rated separation for floor and ceiling of sleeping room 
walls. 

4289.1 Sprinklered builtEngs:. Buildings which 
are completely sprinklered may have resident 
locations one story higher than allowed in Table 
4289. 

4289.2 Sleeping room limitations: Sleeping 
facilities in building licensed for use as 
detoxification facilities shall not be located 
below the first story. 

42810 Egress: At least two exitways located as 
remote as practicable from each other shall be 
provided from each floor of the building. 

42810.1 Every room used for sleeping for the 
impaired and partially impaired shall have an 
exitway access door leading directly to an 
exitway access corridor: 

Exceptions: 

1. Rooms having a means of egress doorway 

leatting lErectly to the exterior of the building 

at grade. 

1 Rooms having a means of egress doorway 

leading directly to the exterior of the building 

above grade and connected directly to grade 

by means of an exterior stairway in 

accordance with 780 CMR 1014.0. 

42810.2 All other sleeping rooms: All other 
sleeping rooms shall comply with the 
requirements of 780 CMR 10 in accordance with 
the provisions for the R-1 use group. 

42810.3 Corridors shall provide at least 36 
inches minimum nominal width. 

42810.4 All means of egress doorways shall be 
32 inches minitnum nominal width. 

ExcepftioK Egress doorways from impaired 
sleeping rooms shall 36 inches minimum 
nominal width. 

42810.5 Every required exitway access corridor 
shall have a one hour fire-resistance rating and 
shall provide access to at least two approve 
exitways without passing through any 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



intervening rooms or spaces other than corridors 

and lobbies. 

Exception: In buildings with a complete 
sprinkler system, exitway access corridors not 
required for the impaired or partially 
impaired may be separated from other use 
areas by non-fire rated partitions 

428.10.6 Stairways: Where not otherwise 
specified in 780 CMR 428.2, a stairway required 
as a means of egress shall be subject to these 
requirements: 

428.10.6.1 Stairways required to provide 
egress for the impaired shall be at least 36 
inches minimum nominal width. The total 
capacity of the stairways shall be adequate for 
the occupancy load served. 

428.10.6.2 Stairway enclosures shall have a 
fireresistance rating of one hour for buildings 
not exceeding three stories in height, and two 
hours for buildings exceeding three stories in 
height. 

428.10.6.3 Doors to the required exitway 
stairways shall be fire doors complying with 
780 CMR 716.0 . Labeled fire doors shall 
have a maximum transmitted temperature 
end point of not more than 450 °F (232 X!) 
above ambient at the end of 30 minutes of 
standard fire test exposure. 

428.11 Interiorfinish: Interiorfinish requirements 
shall comply with Table 428.11. 

Exceptions: 

1. In buildings which are completely 
sprinklered, the interiorfinish requirements may 
be reduced one level except in sleeping rooms for 
the impaired. 

2. The interiorfinish classifications in existing 
buildings may be improved one level by the use 
of fire retardant coatings which have been 
approved when tested in accordance with ASTM 
E-84. 

TABLE 428.11 
INTERIOR FINISH REQUIREMENTS 



Location 


WaUs 


Floor 


Ceiling 


Sleeping rooms, Impaired 


U 


if 


II 


Corridors, Impaired 


I 


l' 


I 


Sleeping rooms, Partially 
impaired 


I 


l' 


I 


Corridors, Partially impaired 


I 


l' 


I 


All other exitway access 
corridors 


n 


if 


II 


Stairways 


I 


f 


I 



Note I: Carpet type floor coverings shall withstand 
a test exposure of 0.45 watts per square centimeter 



when tested in accordance with 780 CMR 805.0. 

Note 2: Carpet type floor coverings shall withstand 
a test exposure of 0.22 watts per square centimeter 
when tested in accordance with 780 CMR 805.0. 

428.12 Fire alarm systems: Manual and automatic 
fire alarm systems shall be provided in accordance 
wUh 780 CMR 917.0 and 918.0 as they apply to 
Use Group R-1. 

Exceptions: 

1. In rooms for the impaired and partially 
impaired the heat detectors required by 
780 CMR 918.0 shall be replaced with approved 
smoke detectors. 

2. All buildings or portions thereof regardless 
of the number of beds shall incorporate manual 
pull stations in conformance with 780 CMR 
917.0. 

428.12.1 Supervision: All automatic and 
manual fire alarm systems shall be supervised in 
accordance with 780 CMR 923.1 or 923.2. 

428.13 Means of egress lighting: Means of egress 
lighting including an emergency lighting system 
shall be provided throughout the facility in 
accordance with 780 CMR 917.0. 

428.14 Smoke enclosure doors: Smoke enclosure 
doors shall be tight-fitting with approved hardware. 

428.15 Heating apparatus: The use of portable 
heaters, solid fuel burning room heaters and 
fireplaces shall be prohibited. 

428.16 Sprinkler systems: Where a complete 
building sprinkler system is installed it shall 
comply with the provisions of NFiPA Standard 
No. 13, as listed in Appendix A. 

428.16.1 All rooms used for sleeping for the 

impaired shall be sprinklered 

Exception: A partial system required for 
sleeping rooms housing impaired individuals 
may be provided with a sprinkler system 
serving no more than six sprinklers, which 
may be connected directly to a domestic water 
supply system having capacity sufficient to 
provide 0.15 gallons per minute per square 
foot of floor area throughout the entire area. 
An indicating shut-off valve shall be installed 
in an accessible location between the 
sprinklers and the connection the domestic 
water supply. 

780 CMR429.0 GROUP DWELLING UNITS 
429.1 General: A Group Dwelling Unit is a 
dwelling unit licensed by or operated by the 



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THE MASSACHUSETTS STATE BUILDING CODE 



Department of Mental Retardation or the 
Department of Mental Health as special residence 
for up to four persons who may or may not be 
capable of self preservation from fire or other 
related hazards. Note, however, 780 CMR 429.1, 
Exceptions 1 and 2. The provisions of 780 CMR 
429.0 shall apply to both new and existing Group 
Dwelling Units. 

Exception 1: 780 CMR 429. shall not apply to a 
group dwelling unit operated or licensed by the 
Department of Mental Retardation (DMR) 
pursuant to 115 CMR 7.00 and 8.00. upon the 
completion of a DMR safety assessment for each 
individual and an approved safety plan for each 
location where services and supports are 
provided Such premise shall be treated as 
conventional R-4, R-3, R-2 and R-1 use as 
applicable. 

Exception 2: Apartment programs as defined in 
104 CMR 17.13(2)(c) in which residents therein 
are also capable of self preservation (unimpaired) 
shall be exempt from all requirements of 
780 CMR 429.0. Such apartment programs shall 
be classified as R-1, R-2, R-3, or R-4, as 
applicable. 

429.1.1 Classification of Use: Group Dwelling 
Units shall be classified as follows: 

Use Group R-2 - The Group Dwelling Unit(s) 
is (are) one or more of three or more dwelling 
units contained in the building. 
Use Group R-3 or R-4 - The Group Dwelling 
Unit(s) is (are) contained in a one or two 
family dwelling. 

429.1.2 Classification of Residents: Persons 
other than staff of the facility who occupy or 
intend to occupy Group Dwelling Units shall be 

• classified by the licensing or Operating Agency 
in one of the following three categories 
according to their capabilities for self 
preservation: 

Impaired: Any resident who is incapable of 
self preservation through physical, mental or 
developmental disability, so as to require 
physical assistance from the staff of the 
Group Dwelling Unit to exit the building or to 
reach an area of refuge within 2'/i minutes. 

Partially Impaired: Any resident who is 
capable with either supervision or instruction 
from the staff of the Group Dwelling Unit but 
without physical assistance, of exiting the 
buiMng or reaching an area of refuge within 
2'/j minutes. 

Unimpaired' Any resident who is capable of 
exiting the building or reaching an area of 
refuge within 2'/i minutes without physical 
assistance, supervision or instruction. 



429.1.3 Application of buiMng code and 
reference:' Except as may otherwise be 
specifically provided in 780 CMR 429.0, 
780 CMR shall apply in its entirety. 

Exception: 780 CMR 34 shall not apply 
However, existing buildings may be used to 
house group dwelling units, provided that 
they comply with the applicable portions of 
780 CMR 429.0, and have no outstanding 
violations of 780 CMR or the specialized 
codes. 

429.1.4 Plans and specifications: Plans shall be 
filed with the building official having 
jurisdiction in accordance with 780 CMR 110.0 
for any building to be constructed as, or altered 
for use as a Group Dwelling Unit under 

780 CMR 429.0. 

429.1.5 Temporary Certificate of Occupancy: 
Upon satisfactory compliance with the code 
sections pertaining to buiMng requirements, the 
building official shall issue a temporary 
certificate of occupancy in accordance with 
780 CMR 120.3 for a period not to exceed 90 
days. This temporary certificate of occupancy 
specifically prohibits residents as defined in 
780 CMR 429.1.2 from inhabiting the building 
overnight until the building official issues the 
certificate of occupancy under 780 CMR 
429.1.8. 

429.1.6 Corresponding Rules and Regulations: 
lis CMR (the Department of Mental 
Retardation) or 104 CMR 17.13 (the Department 
of Mental Health) as listed in Appendix A, 
pertaining to and inducting, but not limited to, 
smoking regulations, staffing ratios, and 
resident classifications shall be provided upon 
request to the building official by the licensing 
or Operating Agency prior to the issuance of a 
certificate of occupancy. Note, however, 
780 CMR 429.1, Exceptions 1 and 2. 

429.1.7 Certification of Residents: The 
licensing Agency shall certify the classification 
of each resident prior to application for a 
Certificate of Occupancy and shall regularly 
re-examine and, where necessary, reclassify 
residents in accordance with Department of 
Mental Retardation or Department of Mental 
Health regulations as listed in Appendix A 
Copies of the current certification of each 
resident shall be kept on file at the Group 
Dwelling Unit, and shall be made available to 
the building official upon request Note, 
however, 780 CMR 429.1, Exceptions I and 2. 

429.1.8 Certificate of Occupancy: Certificates of 
occupancy shall be issued only when a license 
and/or affidavit from the Department of Mental 
Retardation or the Department of Mental Health 
have been provided to the building official 
attesting to the satisfactory compliance with the 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

SPECIAL USE AND OCCUPANCY 



applicable rules and regulations referenced in 
780 CMR 429.1.6, the capabilities for self 
preservation of all residents, and, if appropriate, 
the intent to license the facility. Upon 
compliance with all building requirements of 
780 CMR 429. and receipt of the Licensing 
Agency's affidavit, the building official shall 
issue a certificate of occupancy within 72 hours. 
In addition to the contents specified in 780 CMR 
120.4, the certificate shall indicate the category 
of Group Dwelling Unit for which the building 
has been constructed or altered, as defined in 
780 CMR 429.2. Note, however, 780 CMR 
429.1, Exceptions 1 and 2. 

429.2 Category of Unit/Compliance Options: New 
and existing building containing Group Dwelling 
Units shall be required to satisfy at least one 
compliance option presented for the appropriate 
category of residency as defined in 780 CMR 
429.2: 

Category A Group Dwelling Unit - May contain 
any or all of the resident classifications. 

Category B Group Dwelling Unit - May contain 
only partially impaired or unimpaired residents. 

Category C Group Dwelling Unit - Shall contain 
only unimpaired residents. 

429.2.1 Category A Unit Compliance Options: 
Buildings housing Group Dwelling Units classed 
as "Category A " shall comply with any one of 
the following compliance options: 

1. The entire bulling shall be equipped with 
afire suppression system; or 

2. The building shall be of a protected 
construction type (Type 1, 2A, 2B, 3A, 4 or 
5 A). All interior stairways shall be enclosed 
to comply with the requirements of 780 CMR 
for interior exitway stairways and shall 
discharge directly to the exterior of the 
building or into a code complying grade 
passageway or lobby. The building shall also 
be equipped with fire alarms complying with 
780 CMR 9 for the appropriate use group 
classification; or 

3. The Building shall comply with the 
provisions of 780 CMR 427.0; or 

4. If of unprotected construction (Types 2C, 
3B or SB), the building shall be equipped with 
fire alarms complying with 780 CMR 9 for the 
appropriate use group classification. No 
Group Dwelling Unit(s) shall utilize portions 
of the building above the second story. All 
stories in the building shall be equipped with 
two approved, independent exitways (even if 
the building is classified in Use Group R-3). 
Interior exitway stairways shall be enclosed to 
comply with the requirements of 780 CMR for 
interior exitway stainvays and shall discharge 
directly to the exterior of the building or into 



a code complying grade passageway or lobby; 
or 

5. In those buildings of unprotected 

constructed (Types 2C, 3B or SB) where 

enclosure of interior exitway stairways is 

impractical due to physical limitations of 

configuration of the building (e.g. split entry 

type stainvays), the stairway(s) may be 

permitted to remain unenclosed, provided that 

all sleeping rooms are segregated from the 

open stairway by a minimum of one hour fire 

resistive construction and the exitways are 

arranged so that a second means of egress is 

available from each sleeping area which does 

not pass through the open stairway area. The 

building shall also be equipped with fire 

alarms complying with 780 CMR 9 for the 

appropriate use group classification. No 

Group Dwelling Unit shall utilize portions of 

the building above the second story. All 

stories in the building shall be equipped with 

two approved, independent exitways (even if 

the building is classified in Use Group R-3). 

429.2.1.1 Limitation on location of 

impaired residents: All sleeping rooms of 

impaired residents shall either be located 

on the first story or on a story containing a 

horizontal exit complying with 780 CMR 

1019.0. 

429.2.2 Category B Unit Compliance Options: 
Buildings housing Group Dwelling Units 
classified as "Category B" shall comply with any 
one of the following compliance options: 

1. Any Category A compliance option; or 

2. All stories in the building shall be 
provided with two approved, independent 
exitways (even if the building is classified in 
Use Group R-3). All interior stairways shall 
be enclosed to comply with the requirements 
of 780 CMR for interior exitivay stairways 
and shall discharge directly to the exterior of 
the building or into a code complying grade 
passageway or lobby. The building also shall 
be equipped with fire alarms complying with 
780 CMR 9 for the appropriate use group 
classificatiotu 

429.2.3 Category C Unit Compliance Options: 
Buildings housing Group Dwelling Units 
classified as "Category C" shall comply with any 
one of the following compliance options: 

1. Any Category A compliance option; or 

2. Any Category B compliance option; or 

3. The building shall comply with the 
provisions of 780 CMR 423. 0. 

429.3 Special Fire Safety Items: 

429.3.1 Hazardous Contents: No contents which 
represent a fire hazard greater than that which 
could be expected of ordinary household 



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111 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



furnishings shall be permitted within a Group 
Ihvelling Unit 

429.3.2 Interior Finish: Interior finish in 
exitways and exitway access corridors shall be a 
minimum of Class II, unless the building is 
equipped with a fire suppression system. 
Approved fire retardant paints may be used to 
improve the interior finish classification of 
existing construction to satisfy this requirement 

429.3.3 Locks: Double cylinder deadbolt locks 
which require a key operation on the side from 
which egress is to be made are not permitted in 
Group Dwelling Units. Locks of any type are 
prohibited on sleeping room doors of impaired or 
partially impaired residents or on any door which 
provides access to an exitway. 

429.4 Special inspection/fire drill: Prior to 
occupancy of the group dwelling unit the Licensing 
Agency shall conduct a fire drill to test the 
capability of residents to exit according to their 
residency classification. At least once every 90 
days, the Operating Agency shall also conduct a 
fire drill to test the capability of residents to exit 
according to their residency classification. Drills 



shall be held at unexpected times under varying 
conditions to simulate the unpredictable nature of 
fire emergencies. The building official may, at his 
option, participate in or witness the fire drill, or 
may accept an affidavit from the Operating Agency 
attesting to the performance of each resident or 
prospective resident The affidavit shall also 
specify the date, time and conditions of the drill, 
and shall list all participants and witnesses. 

429.4.1 Conduct of the Fire Drill: During the 
conduct of the drill, one exit shall be blocked to 
simulate a hazardous condition and the alarm 
system shall be activated Successful 
performance for each resident shall be defined 
as his/her ability to exit the building, or where 
horizontal exits are provided to reach an area of 
refuge within 2Vi minutes of the activation of the 
fire alarm system. Only those staff members 
who are normally on duty shall be allowed to 
assist residents, and the only assistance 
permitted shall be that which is provided by the 
staff of the Group Dwelling Unit consistent with 
the classification of each individual resident 



112 



780 CMR - Sixth Edition 



2/7/97 (Effective 2/28/97) 



CHAPTER 5 



GENERAL BUILDING LIMITATIONS 



780 CMR 501.0 GENERAL 
501.1 Scope: The provisions of 780 CMR 5 control 
the height and area of all structures hereafter 
erected, and additions to existing structures based on 
the type of construction, use group, frontage on open 
space providing exposure protection and access to 
structures for fire-fighting purposes, and the 
presence of an automatic sprinkler system. 

780 CMR 502.0 DEnNITIONS 
502.1 General: The following words and terms 
shall, for the purposes of 780 CMR 5 and as used 
elsewhere in 780 CMR, have the meanings shown 
herein. 

Area, building: The area included within 
surrounding exterior walls (or exterior walls and 
fire walls) exclusive of vent shafts and courts. 
Areas of the building not provided with 
surrounding walls shall be included in the 
building area if such areas are included within the 
horizontal projection of the roof or floor above. 

Basement: That portion of a building which is partly 
or completely below grade (see "Story above 
grade"). 

Grade plane: A reference plane representing the 
average of finished ground level adjoining the 
building at ail exterior walls. Where the finished 
ground level slopes away fi"om the exterior walls, 
the reference plane shall be established by the 
lowest points within the area between the building 
and the lot line or, where the lot line is more than 
sk feet (1829 mm) fi-om the building, between the 
building and a point six feet (1829 mm) fi'om the 
building. 

Height 

Building. The vertical distance fi-om grade plane 
to the average height of the highest roof surface. 
Story: The vertical distance fi"om top to top of 
two successive tiers of beams or finished floor 
surfaces; and, for the topmost story, fi"om the top 
of the floor Jjnish to the top of the ceiling joists or, 
where there is not a ceiling, to the top of the roof 
rafters. 

Mezzanine: An intermediate level or levels between 
the floor and ceiling of any story with an 
aggregate floor area of not more than Vs of the 
area of the room in which the level or levels are 
located (see 780 CMR 505.0). 

Story: That portion of a building included between 
the upper surface of a floor and the upper surface 
of the floor or roof next above (also see 
"Mezzanine"). 



Story above grade: Any story having its finished 
floor surface entirely above grade except that a 
basement shall be considered as a story above 
grade where the finished surface of the floor 
above the basement is: 

1. More than six feet (1829 mm) above grade 
plane; 

2. More than six feet (1829 mm) above the 
finished ground level for more than 50% of the 
total building perimeter; or 

3. More than 12 feet (3658 mm) above the 
finished ground level at any point 

780 CMR 503.0 GENERAL HEIGBTT 
AND AREA LIMITATIONS 

503.1 General: The heights and areas of all 
buildings and structures between exterior walls or 
between exterior walls and flre walls, shall be 
governed by the type of construction and the use 
group classification as defined in 780 CMR 3 and 6 
and shall not exceed the limitations fixed in Table 
503, except as specifically modified by 780 CMR 5 
and the following sections: 

Section Subject 

402.7 Covered mall buildings 

403 .3.3.1 High-rise buildings 

414 2 Airport traffic control towers 

416.3 HPM facilities 

418.3.1.1 Grain elevators 

426. Bulk Merchandidng 

Retail Buildings 

3103.3.5 Membrane structures 

503.1.1 Special industrial occupancies: All 

buildings and structures designed to house low- 
hazard industrial processes that require large 
areas and unusual heights to accommodate 
craneways or special machinery and equipment, 
including, among others, rolling mills, structural 
metal fabrication shops and foundries, or the 
production and distribution of electric, gas or 
steam power, shall be exempt fi^om the height and 
area limitations of Table 503. 

503.1.2 Open parking structures: Open parking 
structures shall conform to the height and area 
limitations specified in 780 CMR 406.4. 

503.1.3 Buildings on same lot: Two or more 
buildings on the same lot shall be regulated as 
separate buildings or shall be considered as 
portions of one building if the height of each 
building and the aggregate area of all buildings 
are within the limitations of Table 503 as 
modified by 780 CMR 504.0 and 506.0. The 
provisions of 780 CMR appUcable to the aggre- 
gate building shall be applicable to each building. 



2/7/97 (Effective 2/28/97) 



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113 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

Table 503 
HEIGHT AND AREA LIMITATIONS OF BUILDINGS 

Height limitations of buildings (shown in upper figure as stories and feet above grade plane) , and area limitations of 
one- or two-story buildings facing on one street or public space not less than 30 feet wide (shown in lower figure as 
area in square feet per floor ). See Note a. 

Table notes appear immediately following table. 

N.P. = Not Permitted; N.L. = Not Limited 



USE GROUPS 

Note a 


Tvpe of Construction ll 


Noncombustible 


Noncombustible/ 
Combustible 


Combustible 


Tvpel 


Type 2 


Type 3 


Type 4 


Types 


Protected 
Noteb 


Protected 


Unpro- 
tected 


Pro- 
tected 


Unpro- 
tected 


Heavy 
timber 


Pro- 
tected 


Unpro- 11 
tec ted 


lA 


IB 


2A 


2B 


2C 


3A 


3B 


4 


5A 


5B 


A-1 Assembly; theaters 


N.L. 


N.L. 


5 St. 65' 
19,950 


3 St. 40' 
13,125 


2 St. 30' 
8,400 


3 St. 40' 
11,550 


2 St 30' 
8,400 


3 St. 40' 
12,600 


1 St, 20' 
8,925 


1 SL 20' 
4,200 


A-2 Assembly; night clubs and 
similar uses 


N.L. 


N.L. 
7^00 


3 St. 40' 
5,700 


2 St. 30' 
3,750 


1 St. 20' 
2,400 


2 St 30' 
3,300 


1 St. 20' 
2,400 


2 St. 30' 
3,600 


1 St, 20' 
2,550 


1 St. 20' 
1,200 


A-3 Assembly; lecture halls, recre- 
ation centers, terminals, restaurants 
other than night clubs 


N.L. 


N.L. 


5 St. 65' 
19,950 


3 Sl 40' 
13,125 


2 St, 30' 
8,400 


3 St. 40' 
11.550 


2 St. 30' 
8,400 


3 St. 40' 
12,600 


1 St, 20' 
8,925 


I Sl 20' 
4.200 


A-4 Assembly; churches 

Notec 


N.L. 


N.L. 


5 St. 65' 
34,200 


3 St. 40' 
22,500 


2 St. 30' 
14,400 


3 St. 40' 
19,800 


2 St 30' 
14,400 


3 St. 40' 
21,600 


1 St, 20' 
15,300 


I St. 20' 
7,200 


B Business 


N.L. 


N.L. 


7 St. 85' 
34,200 


5 St 65' 
22,500 


3 St. 40' 
14,400 


4 St. 50' 
19,800 


3 St. 40' 
14,400 


5 SL 65' 
21,600 


3 St, 40' 
15,300 


2 SL 30' 
7,200 


E Educational Note c 


N.L. 


N.L. 


5 St. 65' 
34,200 


3 St. 40' 
22,500 


2 St 30' 
14,400 


3 St. 40' 
19.800 


2 St 30' 
14,400 


3 St, 40' 
21,600 


1 St, 20' 
15,300 
Noted 


1 St. 20' 
7,200 
Noted 


F-1 Factory and industrial 
Moderate 


N.L- 


N.L. 


6 St. 75' 
22,800 


4 St. 50' 
15,000 


2 St 30' 
9,600 


3 St. 40' 
13,200 


2 St 30' 
9,600 


4 SL SO' 
14,400 


2 SL 30' 
10,200 


1 St. 20' 
4.800 


F-2 Factory and Industrial 

low Note h 


N.L. 


N.L. 


7 St 85' 
34,200 


5 St 65' 
22,500 


3 St. 40' 
14,400 


4 St 50' 
19,800 


3 Sl 40' 
14,400 


5 St. 65' 
21,600 


3 St, 40' 
15,300 


2 St, 30' 
7.200 


H-1 High hazard, 

detonaton hazards Notes e, i, k, 1 


1 St,20' 
16.800 


1 St 20' 
14,400 


1 St. 20' 
11,400 


1 Sl. 20' 
7,500 


i St. 20' 
4,800 


1 St 20' 
6,600 


1 Sl 20' 
4,800 


! St 20' 
7,200 


1 St, 20' 
5,100 


N.P 


H-2 High Hazard 

deflagration hazards Note e,i,j,l 


5 St. 65' 
16,800 


3 St. 40' 
14,400 


3 St. 40' 
1 1 ,400 


2 St. 30' 
7,500 


1 St. 20' 
4,800 


2 St. 30' 
6,600 


1 St. 20' 
4,800 


2 St. 30' 
7,200 


1 St, 20' 
5,100 


N.P. 


H-3 High Hazard 

physical hazards Note e,l 


7 St. 85' 
33,600 


7 St 85' 
28,800 


6 St 75' 
22.800 


4 St. 50' 
15,000 


2 St. 30' 
9,600 


3 St. 40' 
13,200 


2 SL 30' 
9,600 


4 St, 50' 
14,400 


2 St. 30' 
10,200 


1 St. 20' 
4,800 


H^ High Hazard 

health hazards Note e,l 


7 St. 85' 
N.L. 


7 St 85' 
N.L. 


7 St. 85' 
34,200 


5 St 65' 
22,500 


3 St 40' 
14,400 


4 SL 50' 
19,800 


3 St. 40' 
14,400 


5 SL 65' 
21,600 


3 St, 40' 
15,300 


2 SL 30' 
7,200 


I-l Institutional, residential care 


N.L. 


N.L. 


9 St 100' 
19,950 


4 St. 50' 
13,125 


3 St. 40' 
8,200 


4 St 50' 
11.550 


3 SL 40' 
8,400 


4 SL50' 
12,600 


3 St, 40' 
8,925 


2 SL 35' 
4,200 


1-2 Institutional, mcapacitated 

Notem 


N.L. 


N.L. 


4 St 50' 
17,100 


2 St, 30' 
11,250 


1 St. 20' 
7,200 


1 St. 20' 
9,900 


N.P. 


1 St, 20' 
10,800 


1 St, 20' 
7,650 


N.P. 


1-3 Instinitional, restrained 


N.L. 


N.L. 


4 St. 50' 
14J250 


2 St 30' 
9,375 


! St. 20' 
6,000 


2 St 30' 
8,250 


1 SL 20' 
6.000 


2 SL 30' 
9,000 


1 SL 20' 
6,375 


NP, 


M Mercantile 


N.L. 


N.L. 


6 St 75' 
22,800 


4 St. 50' 
15,000 


2 St. 30' 
9,600 


3 St 40' 
13,200 


2 SL 30' 
9,600 


4 St. 50' 
14,400 


2 St, 30' 
10,200 


1 St. 20' 
4,800 


R-1 Residential, hotels 


N.L. 


N.L. 


9 St 100' 
22,800 


4 St. 50' 
15,000 


3 St. 40' 
9,600 


4 St. 50' 
13,200 


3 SL 40' 
9,600 


4 St, 50' 
14.400 


3 St. 40' 
10,200 


2 St 35' 
4,800 


R-2 Residential, multi-family 


N.L. 


N.L. 


9 St 100' 
22,800 


4 St. 50' 
15.000 
Notef 


3 St. 40' 
9,600 


4 St 50' 
13,200 
Notef 


3 St. 40' 
9,600 


4 St, 50' 
14,400 


3 St. 40' 
10,200 


2 SL 35' 
4,800 


R-3 Residential, 

multiple single family 


N.L. 


N.L. 


4 St 50' 
22,800 


4 St. 50' 
15,000 


3 St. 40' 
9,600 


4 St 50' 
13,200 


3 SL 40' 
9,600 


4 St, 50' 
14,400 


3 SL 40' 
10,200 


2 St, 35' 
4,800 


S-1 Storage, moderate 


N.L. 


N.L. 


5 St. 65' 
19,950 


4 St. 50' 
13,125 


2 St. 30' 
8,400 


3 St. 40' 
11,550 


2 Sl 30' 
8,400 


4 St, 50' 
12,600 


2 St. 30' 
8,925 


1 St, 20' 
4,200 


S-2 Storage, low Note g 


N.L. 


N.L. 


7 St 85' 
34,200 


5 St 65' 
22,500 


3 St. 40' 
14,400 


4 St. 50' 
19,800 


3 St. 40' 
14,400 


5 SL 65' 
21,600 


3 St. 40' 
15,300 


2 St, 30' 
7,200 


||XJ Utility, miscellaneous 


N.L. 


N.L. 



















Notes applicable to Table 503: 

Note a. See the following sections for 
780 CMR 504.2 AUowable height 



general exceptions to Table 503: 
increase due to automatic sprinkler system installation 



114 



780 CMR - Sixth Editioi5 corrected - 9/19/97 (Effective 2/28/97) 



780 CMR: STATE BOARD OF BUEJDING REGULATIONS AND STANDARDS 

GENERAL BUILDING UMTTATIONS 

780 CMR 506.2 Allowable area increase due to street frontage. 

780 CMR 506.3 Allowable area increase due to automatic fire suppression system installation. 

780 CMR 506.4 Allowable area reduction for multi-story buildings. 

780 CMR 507.0 Unlimited area one-story buildings. 
Note b. Buildings of Type 1 construction permitted to be of unlimited tabular heights and areas are not subject to 
special requirements that allow increased heights and areas for other types of construction (see 780 CMR 503. 1 .4). 
Note c. For height exceptions for auditoriums in occupancies in Use Groups A-4 and E, see 780 CMR 504.3. 
Note d. For height exceptions for day care centers in buildings of Type 5 construction, see 780 CMR 504.4. 
Note e. For exceptions to height and area limitations of buildings for Use Group H, see 780 CMR 4 governing the 
specific use groups. 

Note f. For exceptions to height of buildings for Use Group R-2 of Types 2B and 3 A construction, see 780 CMR 
504.6 and 504.7. 

Note g. For height and area exceptions for open parking structures, see 780 CMR 406.0. 
Note h. For exceptions to height and area limitations for special industrial occupancies, see 780 CMR 503.1.1. 
Note i. Occupancies in Use Groups H-1 and H-2 shall not be permitted below grade. 

Note j. Rooms and areas of Use group H-2 containing pyrophoric materials shall not be permitted in buildings of 
Type 3, 4, or 5 construction. 

Note k. Occupancies in Use Group H-1 are required to be detached one-story buildings (see 780 CMR 707.1.1). 
Note 1. For exceptions to height for buildings with occupancies in Use Group H, see 780 CMR 504.5 
Note m. Hospitals, other than college or school infirmaries, shall be constructed of Type 1-B or higher 
construction. 
Note n. 1 foot = 304.8 mm; 1 square foot = 0.093 m^ 



503.1.4 Type 1 construction: Buildings of Type 1 
construction which are permitted to be of 
unlimited tabular heights and areas by Table 503, 
are not subject to the special requirements that 
allow increased heights and areas for other types 
of construction. 

503.2 Area limitations: The area limitations 
specified in Table 503 shall apply to the maximum 
horizontally projected area of all buildings fronting 
on a street or a public space not less than 30 feet 
(9 144 mm) in width with access from a public street. 

503.3 Height limitations: The height in feet and the 
number of stories above grade specified in Table 
503 shall apply to all buildings and to all separate 
parts of a building that are enclosed within fire walls 
complying with the provisions of 780 CMR 7. A 
basement shall be considered as a story above grade 
where the finished surface of the floor above the 
basement is more than six feet (1829 mm) above 
grade plane; or more than six feet (1829 mm) above 
the finished ground level for more than 50% of the 
total building perimeter; or more than 12 feet (3658 
mm) above the finished ground level at any point. 

780 CMR 504.0 HEIGHT 
MODIFICATIONS 

504.1 General: The provisions of 780 CMR 504.0 
shall modify the height limitations of Table 503 as 
herein specified. 

504.2 Automatic sprinlder systems: Where a 
building is equipped throughout with an automatic 
sprinkler system in accordance with 780 CMR 
906.2.1, the building height limitation specified in 



Table 503 shall be increased one story and 20 feet 
(6096 mm). This increase shall not apply to 
buildings of Types 2C, 3A, 4 and 5A construction 
with an occupancy in Use Group 1-2, or to buildings 
with an occupancy in Use Group H-1, H-2 or H-3. 
The building height limitations for buildings with an 
occupancy in Use Group R specified in Table 503 
shall be increased one story and 20 feet (6096mm) 
where the building is equipped throughout with an 
automatic sprinkler system installed in accordance 
with 780 CMR 906.2.2 and the system is supervised 
in accordance with 780 CMR 923.1, method 1, 2 or 
3, but not to exceed a height of four stories or 60 feet 
(18288 mm). 

504.3 Auditoriums: The maximum height of 
auditoriums in Use Groups A-4 and E shall be 65 
feet (19812 mm) in buildings of Type 2B, 3A, 4 or 
5 A construction and 45 feet (13716 mm) in 
buildings of Type 2C, 3B or 5B construction. 

504.4 Day care centers: The height limitations of 
Table 503 for day care centers classified as Use 
Group E, in buildings of Type 5 construction, shall 
be increased one story and 20 feet (6096 mm) 
provided that the total occupant load is less than 50 
persons. 

504.5 High-hazard use groups: Buildings and 
structures with an occupancy in Use Group H that 
requires unusual heights necessary to accommodate 
special manufacturing processes and equipment shall 
be exempt from the tabular height limitations, in 
feet, of Table 503. 



1/19/01 



780 CMR - Sixth Edition 



115 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



504.6 Type 3A construction: The height limitation 
for buildings of Type 3A construction with 
occupancies in Use Group R-2 shall be increased to 
six stories and 75 feet (22860 mm) where the first 
floor above the basement has a fireresistance rating 
of not less than three hours and the floor area is 
subdivided by two-hour fu'eresistance rated fire 
walls inlo fire areas of not more than 3,000 square 
feet (279 m^). 

504.7 Type 2B construction: The height limitation 
for buildings of Type 2B construction with 
occupancies in Use Group R-2 shall be increased to 
nine stories and 100 feet (30480 mm) where the 
building is separated by not less than 50 feet (15240 
mm) from any other building on the lot and from 
interior lot lines, the exits are segregated in a /ire 
area enclosed by a two-hour fireresistance rated^re 
wall and the first floor construction has a 
fireresistance rating of not less than IVz hours. 

780 CMR 505.0 MEZZANINES 

505.1 General: A mezzanine or mezzanines in 
compliance with 780 CMR 505.0 shall be considered 
a portion of the floor below. Such mezzanines shall 
not contribute to the building area as regulated by 
780 CMR 503.2. Such mezzanines shall not 
contribute to the number of stories as regulated by 
780 CMR 503.3. The area of the mezzanine shall be 
included in determining the /ire area. 

505.2 Area limitation: The aggregate area of a 
mezzanine or mezzanines within a room shall not 
exceed Va of the area of that room. The enclosed 
portions of rooms shall not be included in a 
determination of the size of the room in which the 
mezzanine is located. In determining the allowable 
mezzanine area, the area of the mezzanine shall not 
be included in the area of the room. 

Exception: The aggregate area of mezzanines in 
buildings and structures of Type 1 or 2 
construction for special industrial occupancies in 
accordance with 780 CMR 503.1.1 shall not 
exceed % of the area of that room. 

505.3 Egress: Each occupant of a mezzanine shall 
have access to at least two independent means of 
egress where such spaces require two means of 
egrew in accordance with 780 CMR 1017.2. Where 
a stairway provides a means of exit access from a 
mezzanine, the maximum travel distance required by 
780 CMR 1017.2 shall be measured to the bottom of 



the stairway. 

505.4 Openness: A mezzanine shall be open and 
unobstructed to the room in which such mezzanine 
is located except for walls not more than 42 inches 
(1067 mm) high, columns and posts. 
Exceptions 

1 . Mezzanines or portions thereof are not required 
to be open to the room in which the mezzanines 
are located, provided that the occupant load of the 
aggregate area of the enclosed space does not 
exceed ten. 

2. A mezzanine having two or more means of 
egress is not required to be open to the room in 
which the mezzanine is located, if at least one of 
the means of egress provides direct access to an 
exit ft'om the mezzanine level. 

780 CMR 506.0 AREA MODIFICATIONS 

506.1 General: The provisions of 780 CMR 506.0 
shall modify the area limitations of Table 503 as 
herein specified. 

506.2 Street frontage increase: Where a building or 
structure has more than 25% of the building 
perimeter fronting on a street or other unoccupied 
space, the area limitations specified in Table 503 
shall be increased 2% for each 1% of such excess 
frontage. The unoccupied space shall be on the same 
lot or dedicated for public use, shall not be less than 
30 feet (9144 mm) in width and shall have access 
ft-om a street by a posted fire lane not less than 18 
feet (5486 nun) in width. 

506.3 Automatic sprinkler system: Where a 
building, other than those with an occupancy in Use 
Group H-1, H-2 or H-3, is equipped throughout with 
an automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1, the area 
limitation specified in Table 503 shall be increased 
200% for one-and two-story buildings and 100% 
for buildings more than two stories in height. 

506.4 Multistory buildings: The area limitations 
for buildings two stories in height shall be the same 
as the area limitations provided in Table 503 for one- 
story buildings. In buildings over two stories in 
height, the area limitations of Table 503 for one- 
story buildings shall be reduced as specified in Table 
506.4. 



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GENERAL BUILDING LIMITATIONS 



Table 506.4 
REDUCTION OF AREA LIMITATIONS 



Number of 


Type of Construction 








stories 


lA&lB 


2A 


2B, 2C, 3A, 3B, 4, 5A, 
5B 


1 


None 


None 


None 


2 


None 


None 


None 


3 


None 


5% 


20% 


4 


None 


10% 


20% 


5 


None 


15% 


30% 


6 


None 


20% 


40% 


7 


None 


25% 


50% 


8 


None 


30% 


60% 


9 


None 


35% 


70% 


10 


None 


40% 


80% 



780 CMR 507.0 UNLEVnTED AREAS 
507.1 One-story buildings: For all occupancies 
other than Use Groups A-1, A-2, A-4, A-5, E, H, I-l, 
1-3 and R, the area of buildings that do not exceed 
one story and 85 feet (25908 mm) in height, other 
than buildings of Type 5 construction, shall not be 
limited, provided that the building is equipped 
throughout with an automatic sprinkler system in 
accordance with 780 CMR 906.2. 1 ; and the building 
is isolated as specified in 780 CMR 507.2. Buildings 
with an occupancy in Use Group 1-2 shall not be 
constructed of Tjfpe 3B construction. Except as 
modified by 780 CMR 9, fire areas of Use Group E 
are permitted in unlimited area buildings in 
accordance with 780 CMR 507.1.1. Except as 
modified by 780 CMR 9, fire areas of Use Groups H- 
2, H-3 and H-4 are permitted in unlimited area 
buildings in accordance with 780 CMR 507.1.2. 
Bulk Merchandising Retail Buildings designed, 
constructed and operated in accordance with 780 
CMR 426.0 shall be permitted to be constructed of 
unlimited area." 
Exceptions: 

1. Buildings and structures of special industrial 
occupancies in accordance with 780 CMR 503. 1 . 1 
shall be exempt from the above height limitations 
and^re separation distance requirements, and the 
automatic fire suppression system shall not be 
provided where such installations will be 
detrimental or dangerous to the specific 
occupancy as approved by the code official. 
Where located with afire separation distance of 
less than 30 feet (9144 mm), the exterior walls of 
such buildings shall be protected or constructed to 
provide a fireresistance rating of not less than two 
hours. 

2. An automatic fire suppression system shall not 
be required for buildings of Type 2 or Type 4 
construction which are occupied exclusively for 
the storage of noncombustible materials that are 
not packed or crated in combustible materials. 



3. Buildings and structures of Types 1 and 2 
construction for rack storage facilities which do 
not have access by the public shall not be limited 
in heigh; provided that such buildings conform to 
the requirements of 780 CMR 507. 1 and NFiPA 
23 1 C listed in Appendix A. 

4. The automatic sprinkler system shall not be 
required in areas occupied for indoor participant 
sports, such as tennis, skating, swimming and 
equestrian activities, in occupancies in Use Group 
A-3 provided that: 

4.1.. Exit doors directly to the outside are 
provided for all occupants of the participant 
sport areas; and 

4.2. The building is equipped with a fire 
protective signaling system with manual fire 
alarm boxes installed in accordance with 
780 CMR 917.0. 

507.1.1 School buildings: For occupancies in Use 
Group E, one-story buildings of Type 2, 3 A or 4 
construction shall not be limited in area where a 
direct exit to the outside of the building is 
provided from each classroom and the building is 
equipped throughout with an automatic sprinkler 
system in accordance with 780 CMR 906.2.1. 
Exterior walls on all sides of such buildings shall 
comply with 780 CMR 507.2. 

507.1.2 High-hazard use groups: Use Group H- 
2, H-3 and H-4 fire areas shall be permitted in 
occupancies in Use Groups F and S except as 
modified by 780 CMR 9, and in lecture halls and 
laboratories in Use Groups A-3, B, E and 1-2 in 
accordance with the limitations of 780 CMR 

507. 1 . Fire areas located at the perimeter of the 
building shall not exceed the area limitations 
specified in Table 503 as modified by 780 CMR 

506.2, based upon the percentage of the perimeter 
of the fire area that fronts on a street or other 
unoccupied space. Interior /ire areas shall not 
exceed 25% of the area limitations specified in 
Table 503. Fireresistance rating requirements of 
fire separation assemblies shall be in accordance 
with Table 313.1.2. 

507.2 Exterior walls: The minimum fireresistance 
rating of exterior walls of one-story buildings of 
unlimited area shall be determined by the use group 
and the fire separation distance as specified in Table 
507.2, but shall not be less than the fireresistance 
rating required by Table 602 for the type of 
construction. The entire perimeter of one-story 
unlimited area buildings shall have a minimum^re 
separation distance of 30 feet (9144 mm). 

Exception: The minimum fire separation 
distance of 30 feet (9144 mm) shall not apply to 
a wall facing another building on the same lot, 
provided that: 



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THE MASSACHUSETTS STATE BUILDING CODE 



1. Such wall is constructed as ^fire wall in 
accordance with 780 CMR 707.0; 

2. The length of the^re wall does not exceed 
25% of the total perimeter of the unlimited area 
building; 

3. The adjacent building has a minimum _^re 
separation distance of 30 feet (9144 mm) on 
all sides, except for the side that faces the 
unlimited area building; and 

4. The adjacent building is equipped 
throughout with an automatic sprinkler system 
in accordance with 780 CMR 906.2. 1 . 

507.2.1 Opening protective: Openings in 
exterior walls required by Table 507.2 to have a 
fire resistance rating of three hours or more shall 
be protected with fire assemblies having a fire 
resistance rating of not less than three hours. 



Openings in exterior walls required by Table 
507.2 to have a fire resistance rating of two hours 
shall be protected with fire assemblies having a 
fire protection rating of not less than 1 '/j hours. 

Table 507.2 

MINIMUM FIRE RESISTANCE RATING 

OF EXTERIOR WALLS 



Use Group 


Fireresistance rating (hours) based on 
fire separation distance 


30 Feet or greater but 
less than SO feet 


50 feet or 
greater 


E 

A-3,B,F-2,I-2.S-2 

F-l.M.S-1 


1'/= 
2 
3 








Note a. I foot = 304.8 mm. 



118 



780 CMR - Sixth Edition corrected - 9/19/97 (Effective 2/28/97) 



CHAPTER 6 



TYPES OF CONSTRUCTION 



780 CMR 601.0 GENERAL 

601.1 Scope: The provisions 780 CMR 6 shall 
control the classification of all buildings as to type 
of construction. 

601.2 Application of other laws: The provisions of 
780 CMR 6 shall not be deemed to nullify any 
provisions of the zoning law or any other statute of 
the jurisdiction pertaining to the location or type of 
construction of buildings, except as is specifically 
required by the provisions of 780 CMR. 

6013 Hospitals: Pursuant to M.G.L, c 111, § 51, 
hospitals other than college and school infirmaries 
shall be constructed of at least Type IB 
construction. 

780 CMR 6010 CONSTRUCTION 
CLASSIFICATION 

602.1 General: All buildings and structures erected 
or to be erected, altered or extended in height or 
area shall be classified in one of the five 
construction types defined in Table 602 and 
780 CMR 603.0 through 606.0. 

602.2 False designation: A building shall not be 
designated as a given type of construction unless it 
conforms to the minimum requirements for that type. 

602.3 Minimum requirements: Where a type of 
construction is used that is superior to the minimum 
herein required for any specified use, height and area 
of the building, nothing m 780 CMR shall be 
construed to require full compliance with the 
specifications for the higher type; but the designated 
construction classification of the building shall be 
that of the lesser type, tmless all of the requirements 
for the higher type are fulfilled. 

602.4 Noncombustibility requirements: Where a 
structure or a part of a structure is required to be 
constructed of noncombustible construction, the use 
of combustible elements shall be permitted subject 
to the limitations of 780 CMR 602.0 without altering 



the construction classification. 

602.4.1 Roofs, floors and walls: Combustible 
elements in roofs, floors and walls are permitted 
to be used for the following components: 

1. Interior finish and trim materials as 
regulated by 780 CMR 803.0, 804.0 and 806.0. 

2. Light-transmittingp/ashcj as permitted by 
780 CMR 26. 

3. Fireretardant-treated wood complying with 
780 CMR 23 10.0 as permitted by Table 602. 

4. Mastics and caulking materials appUed to 
provide flexible seals between components of 
exterior wall construction. 

5. Roof covering materials as regulated by 
780 CMR 15. 

6. Thermal and sound insulation as permitted 
by 780 CMR 707.4.722.0. 1509.0. 2309.4 and 
2603.0. 

7. Exterior veneer and trim as permitted by 
780 CMR 1406.0. 

8. Nailing or flirring strips as permitted by 
780 CMR 804.0. 

9. Windows and doors as permitted by 
780 CMR 706.4. 

10. Heavy timber as permitted by 780 CMR 
1006.3.1, 714.2 and 714.4. 

1 1 . Partitions as permitted by 780 CMR 603.2. 

12. Roof structures as permitted by 780 CMR 
1510.0. 

13. Platforms as permitted by 780 CMR 
412.4.1. 

602.4.2 Ducts: The use of nonmetallic ducts is 
permitted in accordance with the mechanical code 
listed in Appendix A. 

602.43 Piping: The use of combustible piping 
materials is permitted in accordance with the 
mechanical and plumbing codes listed in 
Appendix A. 

602.4.4 Electrical: The use of insulated electrical 
wiring and related components is permitted in 
accordance with 527 CMR listed in Appendix A. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

Table 602 
FIRE RESISTANCE RATINGS OF STRUCTURE ELEMENTS 





1 


Type of construction 780 CMR 602.0 




Nonccanbustible 1 


Noncombustible/Combustible | 


Combustible 




Type] 

780 CMR 

603.0 


.Type 2 
780 CMR 603.0 


Type3 
780 CMR 604.0 


Type 4 

780 CMR 

605.0 


Type 5 
780 CMR 606.0 


Structure element 


Protected 


Protected 


Unprotected 


Protected 


Unprotected 


Heavy timber 
Notec 


Protected 


Unprotected 


Note a 


lA IB 


2A 2B 


2C 


3A 


3B 


4 


5A 


5B 


1 Exterior walls 


Loadbearing 


4 3 


21 0|2|2|2|1|0 
Not less than the rating based on fire separation distance (see 780 CMR 705.2) - 




Nonloadbearing 


- Not less than the rating based on fire separation distance (see 780 CMR 705.2) - 


2 Fire walls and party walls 
(780 CMR 707.0) 


4 1 3 1 2 1 2 1 2 1 2 1 2 | 2 | 2 | 2 
-Not less than the fireresistance rating required by Table 707. 1 - 




Fire enclosure of 
exits (780 .CMR 
1014.11,709.0 
and Note b) 


2 


2 


2 


2 


2 


2 


2 


2 


2 


2 


3 Fire separation 
assemblies (780 
CMR 709.0) 


Shafts (other than 
exits) & elevator 
hoistway (780 
CMR 709, 710.0 
&Noteb) 


2 


2 


2 


2 


2 


2 


2 


2 


1 


1 




Mixed use & fire 
area separations 
a80CMR313.0) 


- Not less than the fireresistance rating required by Tabic 3 1 3. 1 .2 - 




Other Separation 
assemblies 
(Note 


1|1|1|1| 1 
-Note d - 


1 


1 


1 


1 


1 


4 Fire partitions 
(780 CMR 
711.0) 


Exit access 

corridors 

(Noteg) 


- Not less then the fii 
-Noted- 


■eresistano 


s rating requir 


ed by 780 CMI 


11011.4- 




Tenant spaces 
separations (Note 



1 1 1 1 1 1 1 1 

-Noted- 


1 





1 


1 





S Dwelling unit separations 

(780 CMR71 1.0, 713.0 & Notesf 
&j) 


-Noted- 


1 


1 


1 


1 


1 


6 Smoke baniers(780CMR 71 2.0 & 
Note g) 


1 


1 


1 


1 


1 


1 


1 


I 


1 


1 


7 Other nonloadbearing partitions 









-N 



3ted- 




















8 Interior load- 
bearing walls, 
loadbearingpar- 
titicms, col- 


Siyjporting more 
than one floor 


4 


3 


2 


1 





1 





See 

780 CMR 

605.0 


1 





tnisses (other 
than roof truss- 
es) & framing 
(780 CMR 
715.0) 


Supportmg one 
floor only ot a 
roof only 


3 


2 


V/z 


1 





1 





See 

780 CMR 

605.0 


I 





9 Structural members supporting wall 
(780 CMR 71 5.0 & Note g) 


3 


2 


\'/2 


1 



-Not less th 


1 
mfireresis 



tance rating o 


1 
f wall supporto 


1 
J- 





1 Floor construction including beams 
(780CMR713.0&Noteh) 


3 


2 


V/i 


1 





1 





See 780 

CMR 

605.0, Note c 


I 





1 1 Roof construc- 
tion, including 
beams, trusses 


15' or less in 
height to lowest 
member 


2 


r/j 


1 


1 
-N 



oled- 


1 





See 780 

CMR 

605.0, Note c 


1 





and framing, 
arches & roof 
deck (780 CMR 
7 1 4.0 & Notes 


More than 15' but 
less than 20' in 
height to lowest 
member 


1 


1 


1 
- Noted - 








See 

780 CMR 

605.0 


1 





e.i) 


20' or more in 
height to lowest 


1 1 1 1 
-Noted- 








See 
780 CMR 

1 ffl^o 









120 



780 CMR - Sixth Edition coirected - 9/19/97 (Effective 2/28/97) 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

TYPES OF CONSTRUCTION 

Note a. For fireresistancc rating requirements for structural membranes and assemblies which support other 

fireresistance rated members or assemblies, see 780 CMR 715. 1. 

Note b. For reductions in the required fireresistance rating of exit and shaft enclosures, see 780 CMR 1014 11 and 

710.3 

Note c. For substitution of other structural materials for timber in Type 4 construction, see 780 CMR 2304.2. 

Note d. For fu-e retardant-treated wood permitted in roof construction and nonloadbearing walls where the required 

fireresistance rating is one hour or less, see 780 CMR 603.2 and 23 10.0. 

Note e. For permitted uses of heavy timber in roof construction in buildings of Types 1 and 2 construction see 

780 CMR 7 14.4. 

Note f. For reductions in required fireresistancc ratings of tenant separations and dwelling unit separations see 

780CMR 101 1.4 and 1011.4.1. 

Note g. For exceptions to the required fu-eresistance rating of construction supporting exit access corridor walls, tenant 

separation walls in covered mall buildings, and smoke barriers, see 780 CMR 71 1.4 and 712.2. 

Note h. For buildings having habitable or occupiable stories or basements below grade, see 780 CMR 1 006.3 . 1 . 

Note i. Not less than the rating required by 780 CMR. 

Note j. For Use Group R-3, see 780 CMR 3 10.5. 

Note k. Fireresistance ratings are expressed in hours. 

Note). 1 foot = 304.8 mm. 



780 CMR 603.0 TYPES 1 AND 2 
CONSTRUCTION 

603.1 General: Buildings and structures of Types 1 
and 2 construction are those in which the walls, 
partitions, structure elements, floors, ceilings, roofs 
and exits are constructed of approved 
noncombustible materials. Each structure element 
shall not be less than the required fireresistance 
rating specified in Table 602, except as otherwise 
specifically provided for in 780 CMR. Buildings of 
Types 1 and 2 construction shall be fiarther classified 
as Type lA, IB, 2A, 2B or 2C. Fireretardant- 
treatedwood shall only be used as specified in Table 
602 and 780 CMR 23 10.0. 

603.2 Interior partitions: In buildings or structures 
of Types I, 2 A and 2B construction, partitions of a 
single thickness of wood or approved composite 
panels, and glass or other approved materials of 
similar combustible characteristics, are permitted to 
subdivide rooms or spaces into offices, entries or 
other similar compartments in all occupancies other 
than Use Groups I and R, provided that such 
partitions neither establish a corridor serving an 
occupant load of more than 30 in areas occupied by 
a single tenant nor exceed 5,000 square feet (465 m^) 
between_/5re separation assemblies or fire walls. The 
maximum allowable compartment size shall be 
increased to 7,500 square feet (700 m^) where 
subdivided with fireretardant-treated wood that 
complies with 780 CMR 23 10.0. 

780 CMR 604.0 TYPE 3 CONSTRUCTION 

604.1 General: Buildings and structures of Type 3 
construction are those in which: the exterior walls 



are constructed of masonry or other approved 
noncombustible materials; the interior structure 
elements, loadbearing walls, partitions, floors and 
roofs are constructed of any approved materials. 
Each structure element shall have not less than the 
required fireresistance rating specified in Table 602, 
except as otherwise specifically provided for in 
780 CMR. Buildings of Type 3 construction shall be 
further classified as Type 3 A or 3B. 

780 CMR 605.0 TYPE 4 CONSTRUCTION 
605.1 General: Buildings and structures of Type 4 
construction are those in which the exterior walls are 
constructed of approved noncombustible materials 
and the interior structural members are of solid or 
laminated wood without concealed spaces or the 
loadbearing walls, partitions, floors and roofs are 
constructed of any noncombustible materials 
permitted by 780 CMR. Each structure element 
shall have not less than the required fireresistance 
rating specified in Table 602. The elements of 
Type 4 construction shall comply with the 
provisions of 780 CMR 2304.0. 

780 CMR 606.0 TYPE 5 CONSTRUCnON 
606.1 General: Buildings and structures of Type 5 
construction are those in which the exterior walls, 
loadbearing walls, partitions floors and roofs are 
constructed of any approved materials. Each 
structure element shall have not less than the 
required fireresistance rating specified in Table 602. 
Buildings of Type 5 construction shall be fijrther 
classified as Type 5A or 5B. 



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121 



780 CMR: STATE BOARD OF BUTLDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 
NON-TEXT PAGE 



122 780 CMR - Sixth Edition 2/7/97 (Effective 2/28/97) 



CHAPTER 7 



FIRERESISTANT MATERIALS AND CONSTRUCTION 



780 CMR 701.0 GENERAL 

70L1 Scope; The provisions of 780 CMR 7 shall 
govern the design and installation of all materials 
and methods of construction in respect to required 
fireresistance rating and flameresistance, as 
determined by the potential fire hazard of the use 
and occupancy of the building or structure and the 
location and fiinction of all integral structural and 
other fireresistive elements of the building; and the 
installation of safeguards against the spread of fire to 
and from adjoining structures. 

701.2 Performance standards: The requirements of 
780 CMR 7 shall constitute the minimum functional 
performance standards for fire protection purposes; 
and shall not be deemed to decrease or waive any 
strength provisions or in any other manner decrease 
the requirements of 780 CMR in respect to structural 
safety. 

701.3 Combustible materials: All materials and 
forms of construction which develop the 
fireresistance ratings required by 780 CMR shall be 
acceptable for fireproofing and structural purposes, 
except that combustible component materials in 
structural units or structural assemblies shall be 
limited in the types of construction specified in 
780 CMR 603.0,604.0 and 605.0, and in 780 CMR 
701.3.1. 

701.3.1 Combustible components: Combustible 
aggregates are permitted in gypsum concrete 
mixtures approved for fireresistance rated 
construction. Any approved component material 
or admixture is permitted in assemblies that meet 
the fireresistive test requirements of 780 CMR. 

780 CMR 702.0 DEFEVITIONS 

702.1 General: The following words and terms 
shall, for the purposes of 780 CMR 7 and as used 
elsewhere in 780 CMR, have the meanings shown 
herein. 

Damper, fire: A damper arranged to seal off air flow 
automatically through part of an air duct system, 
so as to restrict the passage of heat. The fire 
damper shall not be used as a smoke damper 
unless the location lends itself to the dual purpose 
(see 780 CMR 717.0). 

Door assembly, fire: A combination of they/re door, 
frame, hardware and other accessories which 
together provide a specific degree of fire 
protection to the opening (see 780 CMR 716.0). 



Door, fire: A door and its assembly, so constructed 
and assembled in place as to give protection 
against the passage of fire (see 780 CMR 716.0). 

Draftstopping: Building materials installed to 
prevent the movement of air, smoke, gases and 
flame to other areas of the building through large 
concealed passages such as attic spaces and floor 
assemblies with suspended ceiling'; or openweb 
trusses (see 780 CMR 720.0). 

Fire area: The aggregate floor area enclosed and 
bounded by fire walls, exterior walls or fire 
separation assemblies of a building (see 
780 CMR 709.2). 

Fire partition: A vertical assembly of materials 
having protected openings and designed to restrict 
the spread of fire (see 780 CMR 711.0). 

Fire protection rating: The time in hours, or 
fractions thereof, that an opening protective 
assembly will resist fire exposure as determined 
by the test standard specified in 780 CMR (see 
780 CMR 706.0,716.0 and 718.0). 

Fire separation assembly: A horizontal or vertical 
fireresistance rated assembly of materials having 
protected openings, and designed to restrict the 
spread of fire (see 780 CMR 709.0). 

Fire separation distance: The distance in feet 
measured from the building face to the closest 
interior lot line, to the center-line of a street or 
public way or to an imaginary line between two 
buildings on the same property. 

Fire window: A window constructed and glazed to 
give protection against the passage of fire (see 
780 CMR 718.0). 

Fireresistance: That property of materials or their 
assemblies which prevents or retards the passage 
of excessive heat, hot gases or flames under 
conditions of use. 

Fireresistance rating: The time in hours or fractions 
thereof that materials or their assemblies will 
resist fire exposure as determined by the fire test 
specified in 780 CMR (see 780 CMR 704. 1.1). 

Firestopping: Building materials installed to prevent 
the movement of flame and gases to other areas 
of a building through small concealed passages in 



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123 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



building components such as floors walls and 
stairs (see 780 CMR 720.0). 

Protected construction: That in which all structural 
members are constructed, chemically treated, 
covered or protected so that the individual unit or 
the combined assemblage of all such units has the 
required fireresistance rating specified for its 
particular application in Table 602; and includes 
protected combustible and protected 
noncombustible construction. 

Self-closing. As applied to a fire door or other 
opening protective, means normally closed and 
equipped with an approved device which will 
insure closing after having been opened for use 
(see 780 CMR 716.5). 

Shaft: An enclosed space extending through one or 
more stories of a building, connecting vertical 
openings in successive floors, or floors and the 
roof(see 780 CMR 710.0). 

Single membrane penetration: An opening through 
a single membrane (one side) of a fireresistance 
rated wall, roofi'ceiling or floor/ceiling assembly 
made to accommodate pipes, tubes, conduits, 
vents, wires, cables, electrical outlet boxes and 
similar items (see 780 CMR 709.6.5). 

Smoke barrier: A continuous membrane that will 
resist the movement of smoke (see 780 CMR 
712.0). 

Smoke compartment: A space within a building 
enclosed by smoke barriers or fire separation 
assemblies on all sides, including top and bottom 
(see 780 CMR 712.0). 

Through-penetration protection system: Specific 
building materials or assemblies of materials that 
are designed and installed to prevent the spread of 
fire through openings that are made in 
fireresistance rated floors and walls to 
accommodate through-penetrating items such as 
pipes, tubes, conduits, vents, wires, cables and 
similar items. The F rating indicates the period of 
time that the through-penetration protection 
system is capable of preventing the passage of 
flame to the unexposed (nonfire) side of the 
assembly in conjunction with an acceptable hose 
stream test performance. The T rating indicates 
the period of time that the through-penetration 
protection system is capable of preventing the 
passage of flame and a maximum individual 
temperature rise of325°F (163 °C) above ambient 
temperature on the unexposed (nonfire) side of 
the assembly in conjunction with acceptable hose 
stream test performance (see 780 CMR 707.7.2, 
709.6.1 and 713.4.1). 



Vertical opening: An opening through a floor or 
roof 

Wall 

Fire separation wall: A fireresistance rated 
assembly of materials having protected 
openings which is designed to restrict the 
spread of fire (see 780 CMR 709.0). 
Fire wall: A fireresistance rated wall having 
protected openings, which restricts the 
spread of fire and extends continuously from 
the foundation to or through the roof (see 
780 CMR 707.0). 
Party wall: Kfire wall on an interior lot line 
used or adapted for joint service between 
two buildings (see 780 CMR 707.0). 

780 CMR 703.0 CONSTRUCTION 
DOCUMENTS 

703.1 General: Construction documents for all 
buildings shall designate the type of construction 
and the fireresistance rating of all structure elements 
as required by 780 CMR. The construction 
documents shall include documentation or 
supporting data substantiating all required 
fireresistance ratings. 

703.2 Penetrations: Construction documents for 
buildings more than two stories in height shall 
indicate where penetrations will be made for 
electrical, mechanical, plumbing and communication 
conduits, pipes and systems, and shall also indicate 
the materials and methods for maintaining the 
required structural integrity, fireresistance rating and 
firestopping. 

780 CMR 704.0 FIRE TESTS 
704.1 General; Building elements and assemblies 
including loadbearing and nonloadbearing walls and 
partitions, columns, girders, beams, slabs and floors 
and roof assemblies, shall provide the minimum 
fireresistance ratings specified in Table 602 for the 
type of construction unless otherwise required by the 
provisions of 780 CMR. 

704.1.1 Fireresistance ratings: The 

fireresistance ratings of building assemblies and 
structural elements shall be determined in 
accordance with the test procedures set forth in 
ASTM El 19 listed in Appendix A, specific 
methods as provided for herein, or shall be 
determined in accordance with an approved 
analytical method. Where an approved 
analytical method is urilized to establish the 
fireresistance rating of a structural element or 
building assembly, the calculations shall be 
based upon the fire exposure and acceptance 
criteria specified in ASTM E 119 listed in 
Appendix A. 

Exception: In determining the fireresistance 
rating of exterior loadbearing walls. 



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compliance with the ASTM El 19 criteria for 
unexposed surface temperature rise and 
ignition of cotton waste due to passage of 
flame or hot gases, is required only for a 
period of time corresponding to the required 
fireresistance rating of an exterior 
nonloadbearing wall with the same fire 
separation distance, and in a building of the 
same use group. Where the fireresistance 
rating determined in accordance with this 
exception exceeds the fireresistance rating 
determined in accordance with ASTM E 119 
listed in Appendix A, the fire exposure time 
period, water pressure and application 
duration criteria for the hose stream test of 
ASTM El 19 listed in Appendix A, shall be 
based upon the fireresistance rating 
detennined in accordance with this 
exception. 

704.2 Alternative protection: Where 
documentation is submitted to the code official and 
approved, fireresistive coverings or insulating 
enclosing materials are not required for structural 
fi"aming elements. Such documentation shall show 
that the structural integrity of structural fi-aming 
elements will not be reduced below a safe level by a 
fire within the building or in an adjacent building 
having a severity corresponding to the fireresistance 
rating required for the elements through the 
installation of heat shields, separations or other 
approved means oi protection. 

704.3 Opening protectives: Opening protectives 
shall include thtfire door, fire shutter, ^re window 
or fire damper and all required hardware, anchorage, 
fi-ames and sills necessary for the assembly 

704.4 Combustibility tests; Where the behavior of 
materials under exposure to fire is specified in 
780 CMR, the characteristics of materials shall be 
determined by the tests and criteria set forth in 
780 CMR 704.4.1, 704.4.1.1 and 704.4. 1 .2. 

704.4.1 Tests: The tests indicated in 780 CMR 
704.4.1.1 and 704.4.1.2 shall serve as criteria for 
acceptance of building materials as set forth in 
780 CMR 603.0, 604.0 and 605 governing the 
combustibility of building materials in Types 1, 
2, 3 and 4 construction. The term 
"noncombustible" does not apply to the flame 
spread characteristics of interior finish or trim 
materials. A material shall not be classified as a 
noncombustible building construction material 
which is subject to an increase in the 
combustible or flame spread rating beyond the 
limitations herein established through the efifects 
of age, moisture or other atmospheric conditions. 

704.4.1.1 Elementary materials: Materials 
which are intended to be classified as 
noncombusrible shall be tested in accordance 



with ASTM EI36 listed in Appendix A. 
Such materials shall be acceptable as 
noncombustible materials when at least three 
of four specimens tested conform to all of 
the following criteria: 

1 . The recorded temperature of the 
surface and interior thermocouples shall 
not at any time during the test rise more 
than 54°F (30°C) above the fiamace 
temperature at the beginning of the test. 
2- There shall not be flaming fi'om the 
specimen after the first 30 seconds. 
3 If the weight loss of the specimen 
during testing exceeds 50%, the recorded 
temperature of the surface and interior 
thermocouples shall not at any time 
during the test rise above the fiimace air 
temperature at the beginning of the test, 
and there shall not be flaming of the 
specimen. 

704.4.1.2 Composite materials: Materials 
having a structural base of noncombustible 
material as defined in 780 CMR 704.4.1.1. 
with a surfacing not more than Vb inch thick 
which has a flame spread rating not greater 
than 50 when tested in accordance with 
ASTM E84 listed in. Appendix A shall be 
acceptable as noncombustible materials. 

780 CMR 705.0 EXTERIOR WALLS 
705.1 General: AH exterior walls shall comply with 
the applicable provisions of 780 CMR and with the 
fireresistance rating requirements of 780 CMR 705.0 
and 780 CMR 602.0 

Exception: The provisions of 780 CMR 705.2 
and 705.3 shall not apply to exterior walls which 
face buildings on the same lot where the 
buildings are such that, if combined into one 
structure, the resulting building will otherwise 
comply with the height and area limitations of 
780 CMR 503.0 (see 780 CMR 503.1.3). 

705.1.1 Omission of exterior walls: The 

provisions of 780 CMR shall not be deemed to 
prohibit the omission of exterior walls for all or 
part of a story where the provisions of 780 CMR 
705.2 do not require a nonloadbearing exterior 
wall to provide a fireresistance rating, and where 
the provisions of 780 CMR 705.3 and 705.4 do 
not limit the maximum percentage of 
unprotected openings. Except as otherwise 
specifically permitted in 780 CMR 715.5, the 
piers, columns and other structural elements 
within the open portion shall be constructed with 
the fireresistance rating required for exterior 
loadbearing walls in Table 602. 

705.1.2 Combustible exterior wall finish and 
trim: In addition to the requirements of 
780 CMR 705.0, combustible materials installed 
as exterior wall finish, half-timbering, balconies 



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and similar appendages, bay and oriel windows 
and light-transmitting plastic panels, shall meet 
the applicable requirements of 780 CMR 1406.0, 
2604.0, 2605.0 and 2606.0. 

705.2 Fireresistance ratings: The fireresistance 
rating of exterior walls shall comply with Table 
705.2. Loadbearing exterior walls shall also comply 
with the fireresistance rating requirements of 
780 CMR 602.0. The fireresistance rating of 
exterior walls with a fire separation distance of 
greater than five feet (1524 mm) shall be rated for 
exposure to fire fi"om the inside. The fireresistance 
rating of exterior walls with a fire separation 
distance of five feet (1524 mm) or less shall be rated 
for exposure to fire fi^om both sides. 

Table 705.2 

EXTERIOR WALL FIRERESISTANCE 

RATINGS 





a 
Use Group 


Fire Separation 
distance (feet) 


H-2 


F-l,H-3, 
M,S-1 


R-2 


R-3 


A,B,E.F-2, 
H-4,I,R-1. 
S-2 


Oto5 

Greater than 5 to 10 

iGreata-thanlOto J5 
JitfealerthaiilStoSO 

Greater than 30 


4 

2 
1 




3 

2 

5 





1 

1 







1 








2 
1 








Note a. For requirements for Use Group H-1, see 
780 CMR 705.2.1. 

Note b. Fireresistance ratings are expressed in hours. 
Notec 1 foot -304.8 mm. 

705.2.1 Use Group H-1: Buildings and 
structures with an occupancy in Use Group H-1 
shall be located in accordance with the 
requirements for the storage of explosives in the 
fire prevention code listed in Appendix A The 
allowable quantities of Use Group H-1 materials 
shall be based on the TNT equivalency of the 
materials. The exterior finish surface of all 
exterior walls in an occupancy in Use Group H- 1 
shall be of approved noncombustible materials 



or fireretardant-treated wood complying with 
780 CMR 23 10.0 for exterior installation. 

705.2.2 Wall support: The wall shall extend to 
the height required by 780 CMR 705 6, and shall 
be supported such that the wall will remain in 
place for the duration of time indicated by the 
required fireresistance rating. 

705.2.3 Automatic fire suppression: In 

buildings equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.2 1, the required fireresistance 
rating of nonloadbearing exterior walls shall be 
reduced by one hour, except that where the fire 
separation distance is five feet (1524 mm) or 
less, the fireresistance rating shall not be reduced 
to less than one hour This reduction shall not 
apply to occupancies in Use Group H. 

705.2.4 Unexposed surface temperature: 

Where protected openings are not limited by 
Table 705.3, the limitation on the rise of 
temperature on the unexposed surface of exterior 
walls as required by ASTM El 19 listed in 
Appendix A shall not apply. Where protected 
openings are limited by Table 705.3, the 
limitation on the rise of temperature on the 
unexposed surface of exterior walls as required 
by ASTM El 19 listed in Appendix A shall not 
apply provided that a correction is made for 
radiation fi-om the unexposed exterior wall 
surface in accordance with the following 
formula: 

A^-A^(A^xFJ -•'-^ 

Ag = Equivalent area of protected openings 
A = Actual area of protected openings. 
Af = Area of exterior wall surface in the story 
under consideration exclusive of openings, on 
which the temperature limitations of ASTM 
El 19 listed in Appendix A for walls is exceeded. 
¥gg = An "equivalent opening factor" 
derived fi-om Figure 705.2.4 based on the 
average temperature of the unexposed wall 
surface and the fireresistance rating of the wall 
required by 780 CMR 705.2. 



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FIRERESISTANT MATERIALS AND CONSTRUCTION 



Figure 705.2.4 
EQUIVALENT OPENING FACTOR 







200 -teo 530 800 t.BSi 1.a» 1-«B t,i5aj tSOD 

Average temperature of unexposed surface (degrees F; 
705.3 Openings: The maximum area of unprotected 
or protected openings permitted in an exterior wall 
in any story shall not exceed the values set forth in 
Table 705.3. Where both unprotected and protected 
openings are located in the exterior wall in any 
story, the total area of the openings shall comply 
with the following formula; 

^ . ^ . 1.0 
a a 



where: 

A = Actual area of protected openings, or the 
equivalent area of protected openings A^ (see 
780 CMR 705.2.4). 
a = Allowable area of protected openings. 

Ay = Actual area of unprotected openings. 
OL^ - Allowable area of unprotected openings. 

Table 705.3 

MAXIMUM AREA OF EXTERIOR WALL 

OPENINGS* 



Classifi- 


Fire separation distance (feet) 


cation of 
opening 


Oto 

3 


>3 
to 5 


>5 to 

lo" 


>10to 


>15 
10 20" 


>20 
to 25' 


>25 
to so" 


>30 


Un- 
protected 


NP 


Np" 


10% 


15% 


25% 


45% 


70% 


No 
limit 


Protected 


NP 


15% 


25% 


45% 


75% 


No 
limit 


No 
Liinit 


No 
Limit 



Note a. Values given are percentages of the area of the 
exterior wall. This table assumes that the openings are 
reasonably uniformly distributed. Where openings are 
not reasonably imiformly distributed, the portion of the 
wall utilized to calculate compliance Nvith table 705.3 
shall be approved. 

Note b. For occupancies in Use Group R-j, the 
maximum percentage of unprotected exterior wall 
openings shall be 5%. 

Note c. The area of openings in an open parking 
structure with a fire separation distance of greater than 
ten feet shall not be limited. 

Note d. For occupancies in Use Group H-2 or H-3, 
unprotected openings shall not be permitted for openings 
with a fire separation distance of 15 feet or less. 
Notee. One foot = 304.8 mm. 

705.3.1 Automatic fire suppression: In 

buildings equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.2. 1, the maximum allowable area 
of unprotected openings in all occupancies other 
than Use Groups H-1, H-2 and H-3 shall be the 
same as the tabulated limitations for protected 
openings. 

705.3.2 First story: In all occupancies other 
than Use Group H, unlimited unprotected 
openings are permitted in the first story of 
exterior walls facing a street which have z. fire 
separation distance of greater than 15 feet (4572 
mm). 



NP (Not permitted) 



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705.4 Vertical separation of openings: Openings in 
exterior walls in adjacent stories shall be separated 
vertically to protect against fire spread on the 
exterior of the buildings where the openings are 
within five feet (1524 mm) of each other 
horizontally and the opening in the lower story is not 
a protected opening in accordance with 780 CMR 
706.0. Such openings shall be separated vertically 
at least three feet (914 mm) by spandrel girders, 
exterior walls or other similar assemblies which 
have a fireresistance rating of at least one hour or by 
flame barriers which extend horizontally at least 30 
inches (762 mm) beyond the exterior wall. Flame 
barriers shall also have a fireresistance rating of at 
least one hour. The unexposed surface temperature 
limitations specified in ASTM E1I9 listed in 
Appendix A shall not apply to the flame barriers or 
vertical separation unless otherwise required by the 
provisions of 780 CMR. 

Exceptions: 

1 . 780 CMR 705 .4 shall not apply to buildings 
that are three stories or less in height. 

2. 780 CMR 705.4 shall not apply to buildings 
equipped throughout with an automatic sprinkler 
system in accordance with 780 CMR 906.2.1. 

705.5 Vertical exposure: Approved protectives 
shall be provided in every opening that is less than 
15 feet (4572 mm) vertically above the roof of an 
adjoining building or adjacent structure which is 
within a horizontal Jire separation distance of 1 5 
feet (4572 mm) of the wall in which the opening is 
located, unless such roof construction affords a 
fireresistance rating of not less than one hour. 

705.6 Continuity of exterior walls: Exterior walls 
required to be fireresistance rated by 780 CMR 
705.2 because of fire separation distance, shall be 
continuous fi-om the foundation to not less than 30 
inches (762 mm) above the roof surface. 

Exceptions: 

1. Where the roof deck or sheathing is 
constructed of approved noncombustible 
materials or of fireretardant-treated wood or of 
%-inch Type X gypsum board supported directly 
beneath the underside of the roof sheathing or 
deck, using minimum two-inch ledgers attached 
to the sides of the roof fi-aming members for a 
minimum distance of four feet (1219 mm) fi-om 
the exterior wall, and where the roof covering 
has a minimum of a Class C rating, the exterior 
wall shall be permitted to stop at the underside 
of the ro^f deck or sheathing. 

2. Exterior walls in buildings not exceeding 
1,000 square feet (93 m') in area. 

3. Exterior walls of occupancies in Use Group 
R-3. 

4. Exterior walls of a building where the roof 
has an angle of more than 20 degrees (0.35 rad) 
with the horizontal. 



780 CMR 706.0 EXTERIOR OPE]>flNG 
PROTECTIVES 

706.1 Where required: Exterior opening 
protectives shall be provided in all exterior wall 
openings that are required to be protected by 
780 CMR 705.0. 

706.2 Automatic protection: Approved fire 
protective assemblies shall be fixed, self-closing or 
equipped with approved automatic-closing devices 
and shall conform to the requirements of 780 CMR 

706.0 and 780 CMR 702.0, 716.0, 717.0, 718.0 and 
719.0. 

Exception: Fire protective assemblies are not 
required where outside automatic sprinklers are 
installed for the protection of the exterior 
openings. The sprinklers shall be installed in 
accordance with NFiPA 13 listed in Appendix A, 
and shall have an automatic water supply and be 
provided with a fire department connection. 

706.3 Fireresistance rating: Exterior openings 
required to be protected by 780 CMR 705.3, when 
located in a wall required by 780 CMR 705.2 to 
have a fireresistance rating of greater than one hour, 
shall be protected with an assembly having a. fire 
protection rating of not less than 1 V2 hours. Exterior 
openings required to be protected by 780 CMR 
705.3, when located in a wall required by 780 CMR 
705.2 to have a fireresistance rating of one hour, 
shall be protected with an assembly having afire 
protection rating of not less than % hour. Exterior 
openings required to be protected by 780 CMR 

705.4 or 705.5 shall be protected with an assembly 
having a fire protection rating of not less than Vi 
hour. 

706.4 Unprotected openings: Where protected 
openings are not required by 780 CMR 705.0, 
windows and doors shall be constructed of any 
approved materials. Glazing shall conform to the 
requirements of 780 CMR 14, 24 and 26. 

780 CMR 707.0 FERE WALLS 
AND PARTY WALLS 

707.1 General: Walls shall have sufficient structural 
stability under fire conditions to allow collapse of 
construction on either side without collapse of the 
wall, and shall be constructed of any approved 
noncombustible materials that provide the required 
strength and fireresistance rating specified in Table 
602 for the type of construction, but not less than the 
fireresistance rating of the use group specified in 
Table 707.1. Strength and stability shall comply 
with the provisions of 780 CMR 14 and 16. 



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FIRERESISTANT MATERIALS AND CONSTRUCTION 



Table 707.1 

FIRE AND PARTY WALL 

FIRERESISTANCE RATINGS 



Use Group 


Minimum Fireresistance 
rating (hours) 


A-3, A-4, A-5, B, E, F-2, 
H-4,I-1,I-2.R, S-2 


2 


A-1,A-2,F-1,H-3,I-3,M, 
S-1 


3 


H-2 


4 



Note a. For requirements for Use Group H-1, see 780 
CMR 707.1.1. 

707.1.1 Use Group H-1: Occupancies in Use 
Group H- 1 shall not be located in a building that: 
is more than one story in height, has a basement; 
or is attached to another building. An occupancy 
in any use group other than H-1 shall not be 
located in a building with an occupancy in Use 
Group H- 1 . 

Exception: The story above grade, where 
provided with barricaded construction in 
accordance with the fire prevention code 
listed in Appendix A, shall not be considered 
a basement. 

707.2 Cutting walls: A wall that is eight inches or 
less in thickness shall not be cut for chases or 
socketed for insertion of structural members 
subsequent to erection (see 780 CMR 2109.1.1). 

7073 Hollow walls: The wall shall not be less than 
the minimum thickness specified in ACT 530/ASCE 
5/TMS 402 listed in Appendix A. 

707.4 Combustible insulation: The code official 
shall permit the application of cork, fiberboard or 
other combustible insulation where laid up without 
intervening air spaces and attached directly to the 
face of the wall, and where protected on the exposed 
surface as provided for in 780 CMR 722.0 and 
2309.1. 

707.5 Continuity of walls: In all buildings or 
structures, walls shall be continuous from foundation 
to two feet eight inches (813 mm) above the roof 
surface, except as provided for in 780 CMR 707.5.1 
through 707.5.3. Fire walls shall be made smoke 
tight at their junction with exterior walls. In exterior 
wall construction employing studs, the wall shall 
extend through the stud space to the exterior 
sheathing. 

707.5.1 Noncombustible roofs: The wall is 
permitted to terminate at the underside of the 
roof deck where the roof is of approved 
noncombustible construction and is properly 
fires topped at the wall. 

707.5.2 Combustible roofs: The wall is 
permitted to terminate at the underside of the 
roof deck in Types 3, 4 and 5 construction where 
all of the following conditions are met: 

1. The wall is piopcily firestopped at the 



deck. 

2. The roof sheathing or deck is constructed 
of approved noncombustible materials or of 
fireretardant-treated wood, for a distance of 
four feet (1219 mm) on both sides of the 
waU, or such roof sheathing or deck is 
constructed with %-inch Type X gypsum 
board supported directly beneath the 
underside of the roof sheathing or deck, 
using minimum two-inch ledgers attached to 
the sides of the roof framing members, for a 
minimum distance of four feet (1219 mm) on 
both sides of the fire wall. 

3. Combustible material does not extend 
through the wall. 

4. The roof covering has a minimum of a 
Class C rating. 

707.5.3 Noncombustible frame: The wall shall 
not be supported on the structural frame in 
buildings of noncombustible construction unless 
such supporting frame and all members, which 
under fire conditions provide lateral support for 
the frame, have a fire resistance at least equal to 
that required for the wall. 

707.6 Offset fire walls: Where fire walls are offset 
at intermediate floor levels in protected skeleton- 
frame construction, the offset floor construction and 
the intermediate wall supports shall be constructed 
of approved noncombustible materials with a 
fireresistance rating not less than that required for 
The fire wall. 

707.7 Penetrations: Penetrations through fire walls 
shall meet the limitations specified in 780 CMR 
707.7.1 through 707.7.4. 

707.7.1 Combustible framing: hi addition to 
the provisions of 780 CMR 2305.6, adjacent 
combustible members entering into a masonry 
fire wall from opposite sides shall not have less 
than a four-inch (102 mm) distance between 
embedded ends. Where combustible members 
frame into hollow walls or walls of hollow units, 
all hollow spaces shall be soUdly filled for the 
full thickness of the wall and for a distance not 
less than four inches (102 mm) above, below and 
between the structural members, with 
noncombustible materials approved for 
firestopping in accordance with 780 CMR 720.0. 

707.7.2 Noncombustible penetrations: Cables 
and wires without combustible jackets or 
insulation, and noncombustible pipes, tubes, 
conduits and vents which penetrate afire wall 
shall be tested in accordance with ASTM El 19 
listed'm Appendix A aspart of a rated assembly, 
or shall be protected by an approved through- 
penetration protection system that has been 
tested in accordance with ASTM E814 listed in 
Appendix A, or the annular space around the 
penetrating item shall be protected in accordance 
with 780 CMR 707.8. 



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THE MASSACHUSETTS STATE BUILDING CODE 



The through-penetration protection system 
shall be tested in accordance with ASTM E814 
listed in Appendix A, with a minimum positive 
pressure differential of 0.01 inch of water 
column (2.5 P) and shall have an "F" rating of 
not less than the required rating of the wall 
penetrated. 

707.7.3 Combustible penetrations: Cables and 
wires with combustible jackets or insulation, and 
combustible pipes, tubes and conduits which 
penetrate Afire wall shall be tested in accordance 
with ASTM El 1 9 listed in Appendix A as part of 
a fireresistance rated assembly or shall be 
protected by an, approved through-penetration 
protection system that has been tested in 
accordance with ASTM E814 listed in 
Appendix A. 

The through-penetration protection system 
shall be tested in accordance with ASTM E814 
listed in Appendix A, with a minimum positive 
pressure differential of 0.01 inch of water 
column (2.5 P) and shall have an "F" rating of 
not less than the required rating of the assembly 
penetrated. 

707.7.4 Electrical outlet boxes: Openings for 
steel electrical outlet boxes that do not exceed 16 
square inches (10323 mm^ in area are permitted 
provided that the area of such openings does not 
exceed 100 square inches (64516 mm^) for any 
100 square feet (9.3 m^) of wall area. Outlet 
boxes on opposite sides of the wall shall be 
separated by a horizontal distance of not less 
than 24 inches (610 mm). 

Exception: Openings for electrical outlet 
boxes of any material are permitted provided 
that such boxes are tested for use in 
fireresistance rated assemblies and installed 
in accordance with the tested assembly. 

707.8 Annular space protection: Where permitted 
by 780 CMR 707.7.2 for noncorabustible penetrating 
items, the annular space between the penetrating 
item and the fireresistance rated assembly being 
penetrated shall be protected as specified in 
780 CMR 707.8.1 and 707.8.2. 

707.8.1 Material: The material used to fill the 
annular space shall comply with 780 CMR 
707.8.1.1 or 707.8.1.2. 

707.8.1.1 Concrete or masonry assemblies: 

Penetrations of concrete or masonry 
assemblies by a maximum six-inch nominal 
diameter copper, iron or steel pipe, tube, 
conduit or wires and cables with steel jackets 
shall be permitted provided that the 
maximum opening size is 144 square inches 
(0.09 m^) and the penetration is protected 
with concrete, grout or mortar for the full 
thickness of the assembly or the thickness 
required to provide a fireresistance rating 



equivalent to the required fireresistance 
rating of the assembly penetrated. 

707.8.1.2 All assemblies: In all assemblies 
the material shall prevent the passage of 
flame and hot gases sufficient to ignite 
cotton waste when subjected to the time- 
temperature fire conditions of ASTM El 19 
listed in Appendix A, under a minimum 
positive pressure differential of 0.01 inch of 
water column (2.5 P) at the location of the 
penetration for the time period equivalent to 
the required fireresistance rating of the 
assembly penetrated. 

707.8.2 Sleeves: Where sleeves are installed, the 
sleeves shall be noncombustible and shall be 
securely fastened to the assembly penetrated. 
All space between the item contained in the 
sleeve and the sleeve itself, and any space 
between the sleeve and the assembly penetrated, 
shall be filled with a material that complies with 
780 CMR 707.8.1. 

780 CMR 708.0 FIRE WALL OPENINGS 

708.1 General: Openings in fire walls shall not 
exceed the limitations in size and area herein 
prescribed. 

708.2 Size of opening: Each opening through a. fire 
wall shall not exceed 120 square feet (11.16 m^). 
The aggregate width of all openings at any floor 
level shall not exceed 25% of the length of the wall. 

Exception: Openings shall not be limited to 120 
square feet (11.16 m^) where both buildings are 
equipped throughout with an automatic sprinkler 
system installed in accordance with780 CMR 9. 

708.2.1 First story: Where the entire first-story 
floor areas on both sides of a fire wall are 
equipped throughout with an approved 
automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1, the 
maximum allowable size of openings on the first 
story of the building shall not exceed 240 square 
feet (22.32 m^ with a minimum distance of three 
feet (914 mm) between adjacent openings. 

708.3 Opening protectives: AH opening protectives 
in fire walls shall comply with the provisions of 
780 CMR 704.0 and shall have the minimum _^re 
protection rating as set forth in 780 CMR 716.0. 

780 CMR 709.0 FIRE SEPARATION 
ASSEMBLIES 

709.1 General: Fire separation assemblies installed 
for purposes of the enclosure of exits, floor 
openings, shafts, areas of refiige and for subdividing 
purposes shall be constructed of approved materials 
consistent with the limitations for the building type 
of construction and shall have not less than the 
fireresistance rating prescribed by Table 602. 



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FIRERESISTANT MATERIALS AND CONSTRUCTION 



709.2 Fire area: Kfire separation assembly which 
separates adjacent fire areas shall have a 
fireresistance rating of not less than the 
fireresistance rating required by Table 313.1.2 based 
on the use group of the fire areas which are 
separated. 

709.3 Openings: Openings located in a fire 
separation assembly shall be limited to a maximum 
aggregate width of 25% of the length of the wall, 
and the maximum area of any single opening shall 
not exceed 120 square feet (1 1 m"). Openings in exit 
enclosures, other than unexposed exterior openings, 
shall be limited to those necessary for exit access to 
the enclosure from normally occupied spaces and for 
egress from the enclosure. 

Exception: Openings shall not be limited to 120 
square feet (II m^) where adjoining ^re areas 
are equipped throughout with an automatic 
sprinkler system installed in accordance with 
780 CMR 9. 

709.3.1 Protectives: All opening protectives in 
fire separation assemblies shall comply with the 
provisions of 780 CMR 704.0 and shall have the 
minimum fire protection rating as set forth in 
780 CMR 716.0. 

709.4 Continuity: All vertical fire separation 
assemblies shall extend from the top of the 
fireresistance rated floor/ceiling assembly below to 
the underside of the floor or roof slab or deck above 
and shall be securely attached thereto. These walls 
shall be continuous through all concealed spaces 
such as the space above a suspended ceiling. The 
supporting construction shall be protected to afford 
the required fireresistance rating of the fire 
separation assembly supported. All hollow vertical 
spaces shall be firestopped at every floor level as 
required in 780 CMR 720.0. 

709.5 Exterior walls: Except as provided for in 
780 CMR 1014.11.1 and 1014.12.2, where exterior 
walls serve as a part of a required fireresistance rated 
enclosure, such walls shall comply with the 
requirements of 780 CMR 705.0 for exterior walls 
and the fireresistance rated enclosure requirements 
shall not apply. 

709.6 Penetrations: Penetrations through 
fireresistance rated wall assemblies shall meet the 
limitations specified in 780 CMR 709.6.1 through 
709.6.5. Penetrations through floor/ceiling and 
roo£7ceiling assemblies shall comply with 780 CMR 
713.0. Penetrations of an exit enclosure shall also 
comply with 780 CMR 1014.11.2. 

709.6.1 Noncombustible penetrations: Cables 
and wires without combustible jackets or 
insulation, and noncombustible pipes, tubes, 
conduits and vents which penetrate an assembly 
shall be tested in accordance with ASTM El 19 



listed in Appendix A as part of a rated assembly, 
or shall be protected by an approved through- 
penetration protection system that has been 
tested in accordance with ASST. E8 14 listed in 
Appendix A, or the annular space around the 
penetrating item shall be protected in accordance 
with 780 CMR 709.7. 

The through-penetration protection system 
shall be tested in accordance with ASTM E8 14, 
with a minimum positive pressure differential of 
0.01 inch of water column (2.5 P) and shall have 
an "F" rating of not less than the required rating 
of the assembly penetrated. 

709.6.2 Combustible penetrations: Cables and 
wires with combustible jackets or insulation, and 
combustible pipes, tubes, conduits and vents 
which penetrate an assembly shall be tested in 
accordance with ASTM El 19 listed in Appendix 
A as part of a fireresistance rated assembly or 
shall be protected by an approved through- 
penetration protection system that has been 
tested in accordance with ASTM E814 listed in 
Appendix A. 

The through-penetration protection system 
shall be tested in accordance with ASTM E814 
with a minimum positive pressure differential of 
0.01 inch of water column (2.5 P) and shall have 
an "F" rating of not less than the required rating 
of the assembly penetrated. 

709.6.3 Electrical outlet boxes: Openings for 
steel electrical ouflet boxes that do not exceed 16 
square inches (10323 mm'^) in area are permitted 
provided that the area of such openings does not 
exceed 100 square inches (64516 mm^) for any 
100 square feet (9.3 m^) of enclosure wall area. 
Outlet boxes on opposite sides of the assembly 
shall be separated by a horizontal distance of not 
less than 24 inches (6 1 mm). 

Exception: Openings for electrical outlet 
boxes of any material are permitted provided 
that such boxes are tested for installation in 
fireresistance rated assemblies and installed 
in accordance with the tested assembly. 

709.6.4 Ducts: Ducts that penetrate an assembly 
shall be provided with approved ^re dampers 
that comply with 780 CMR 717.0. 

Exception: Fire dampers are not required: 

1. In steel exhaust air subducts extending at 
least 22 inches (559 mm) vertically in an 
exhaust shaft and where there is a continuous 
airflow upward to the outside. 

2. In penetrations tested in accordance with 
ASTM EI 19 listed in Appendix /I as a part 
of the fireresistance rated assembly. 

3 . In penetrations of walls with a required 
one-hour fireresistance rating or less by a 
ducted HVAC system in areas of other than 
Use Group H where the building is equipped 
throughout with an automatic sprinkler 



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system in accordance with 780 CMR 
906.2. L 

4. In garage exhaust or supply shafts which 
are separated from all other building shafts 
by not less than a two-hour fireresistance 
rated ft re separation assembly. 

709.6.5 Single membrane penetrations: 

Openings to accommodate noncombustible 
conduits, pipes and tubes through a single 
membrane that is an integral component of a 
fireresistance rated wall assembly shall be 
permitted provided that the aggregate area of all 
such openings does not exceed 100 square 
inches (64516 mm^) in any 100 square feet (9.3 
m^ of wall area and the openings axtftrestopped 
with approved noncombustible materials. 

709.7 Annular space protection: Where permitted 
by 780 CMR 709.6. 1 for noncombustible penetrating 
items, the annular space between the penetrating 
item and the fireresistance rated assembly being 
penetrated shall be protected as specified in 
780 CMR 709.7.1 through 709.7.3. 

709.7.1 Materials: The material used to fill the 
annular space shall comply with 780 CMR 
709.7.1.1 or 709.7.1.2. 

709.7.1.1 Concrete or masonry assemblies: 

Penetrations of concrete or masonry 
assemblies by a maximum six-inch nominal 
diameter copper, iron or steel pipe, tube, 
conduit or wires and cables with steel jackets 
shall be permitted provided that the 
maximum opening size is 144 square inches 
(0.09 m^) and the penetration is protected 
with concrete, grout or mortar for the fiill 
thickness of the assembly or the thickness 
required to provide a fireresistance rating 
equivalent to the required fireresistance 
rating of the assembly penetrated. 

709.7.1.2 All assemblies: In all assemblies, 
the material shall prevent the passage of 
flame and hot gases sufficient to ignite 
cotton waste when subjected to the time- 
temperature fire conditions of ASTM El 19 
listed in Appendix A under a minimum 
positive pressure differential of 0.01 inch of 
water column (2.5 P) at the location of the 
penetration for the time period equivalent to 
the required fireresistance rating of the 
assembly penetrated. 

709.7.2 Sleeves: Where sleeves are installed, the 
sleeves shall be noncombustible and shall be 
securely fastened to the assembly penetrated. 
All space between the item contained in the 
sleeve and the sleeve itself and any space 
between the sleeve and the assembly penetrated 
shall be filled with a material that complies with 
780 CMR 709.7.1. 



709.7.3 Insulation: Insulation and coverings on 
the penetrating item shall not pass through the 
assembly unless these materials maintain the 
required fireresistance rating of the assembly in 
accordance with 780 CMR 709.6.2. 

780 CMR 710.0 VERTICAL SHAFTS 

710.1 General: The provisions of 780 CMR 710. C 
shall apply to all vertical shafts where such shafts 
are required to protect openings and penetrations 
through floor/ceiling and roof/ceiling assemblies as 
required by 780 CMR 713.3 and 713.4. 

710.2 Construction: The shaft and the shaft 
enclosure shall be constructed of materials permitted 
by 780 CMR 602.0 for the type of construction of 
the building. Shaft walls which are exterior walls 
shall be constructed of materials approved for 
exterior walls in accordance with 780 CMR 14. 

710.3 Fireresistance rating: A shaft shall be 
enclosed W\i\\ftre separation assemblies complying 
with 780 CMR 709.0 having a fireresistance rating 
of not less than two hours where a shaft connects 
four stories or more and one hour where connecting 
less than four stories. A shaft enclosure shall have 
a fireresistance rating of not less than the required 
rating of the floor assembly penetrated but shall not 
be required to exceed two hours. 

Exception: The fireresistance rating of interior 
stairway enclosures shall comply with 780 CMR 
1014.11. 

710.3.1 Openings in shaft enclosures: 

Openings other than those necessary for the 
purpose of the shaft shall not be permitted in 
shaft enclosures. Openings in shaft enclosures 
shall be protected with approved opening 
protectives in accordance with 780 CMR 706.0, 
716.0, 717.0 and 718.0. 

710.4 Top enclosure: A shaft that does not extend 
to the underside of the roof deck of the building shall 
be enclosed at the top with a ftre separation 
assembly having a fireresistance rating of not less 
than that required for the shaft enclosure walls. 

710.5 Bottom enclosure: Shafts which do not 
extend to the bottom of the building shall be 
enclosed at the lowest level with a. ftre separation 
assembly having a fireresistance rating of not less 
than that required for the shaft enclosure walls, or 
shall terminate in a room having an occupancy 
related to the purpose of the shaft. The room shall 
be separated from the remainder of the building by 
fire separation assemblies having a fireresistance 
rating with opening protectives of not less than that 
required for the shaft enclosure. 



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FIRERESISTANT MATERIALS AND CONSTRUCTION 



Exceptions: 

1. The fireresistance rated room separation is 
not required provided that there are not any 
openings in or penetrations through the shaft 
enclosure to the remainder of the building except 
at the bottom. The bottom of the shaft shall be 
closed off around the penetrating items with 
materials permitted by 780 CMR 720.3 for 
draftstopping, or the room shall be equipped 
throughout with an automatic sprinkler system 
installed in accordance with 780 CMR 9. 

2. The fireresistance rated room separation and 
protection at the bottom of the shaft are not 
required where there are not any combustible 
materials in the shaft and where there are not any 
openings in or other penetrations through the 
shaft enclosure to the remainder of the building. 

780 CMR TILO FIRE PARHTIONS 

711.1 Genera]: Fire partitions shall be constructed 
of the types of materials and have the minimum 
fireresistance rating as prescribed by Table 602 for 
the type of construction. 

Exception: Dwelling unit separations in 
buildings of Types 2C, 3B and 5B construction 
shall have fireresistance ratings of not less than 
Vi hour in buildings equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.2.1 or 780 CMR 906.2.2, 
provided that sprinklers are installed in all 
closets located against tenant separation walls 
and in all bathrooms. 

711.2 Corridor walls and tenant and dwelling 
unit separations: Wall assemblies that are installed 
as required by Table 602 for corridor walls, to 
separate tenant spaces and to separate dwelling units, 
shall ht fire partitions. 

711.3 Protectives: All opening protectives in^re 
partitions shall comply with the provisions of 
780 CMR 704.0 and shall have the minimum 
fireresistance rating as set forth in 780 CMR 716.0. 

711.4 Continuity: Al\ fire partitions shall extend 
fi'om the top of the floor assembly below to the 
underside of the floor/roof slab or deck above or to 
the fireresistance rated floor/ceiling or roofceiling 
assembly above, and shall be securely attached 
thereto. The supporting construction shall be 
protected to afford the required fireresistance rating 
of the wall supported, except for exit access corridor 
walls in buildings of Types 2C, 3B and 5B 
construction and tenant separation walls in covered 
mall buildings of Type 2C construction. All hollow 
vertical spaces shall be firestopped at every floor 
level as required in 780 CMR 720.0. 

711.5 Exterior walls: Where exterior walls serve as 
a part of a required fireresistance rated enclosure, 



such walls shall comply with the requirements of 
780 CMR 705.0 for exterior walls and the 
fireresistance rated enclosure requirements shall not 
apply. 

711.6 Penetrations: Penetrations through 
assemblies shall comply with 780 CMR 709.6 
through 780 CMR 709.7 3. 

Exception: In occupancies in other than Use 
Group li,Jire dampers are not required: 

1 . At penetrations of tenant separation and 
corridor walls in buildings equipped throughout 
with an automatic sprinkler system in 
accordance with 780 CMR 906.2.1. 

2. At penetrations of corridor walls where the 
ducts are constructed of steel and do not have 
openings which communicate the corridor with 
adjacent spaces or rooms. 

780 CMR 712.0 SMOKE BARRIERS 

712.1 Where required: Smoke barriers shall be 
provided as required in 780 CMR 409.4 for 
occupancies in Use Group 1-2 and 780 CMR 410.6 
for occupancies in Use Group 1-3 . 

712.2 Construction: Smoke barriers shall have a 
fireresistance rating of not less than one hour. Such 
barriers shall form an effective membrane 
continuous fi"om outside wall to outside wall and 
fi-om floor slab to floor or roof deck above, including 
continuity through all concealed spaces, such as the 
space above suspended ceilings, and including 
interstitial structural and mechanical spaces. 
Transfer grilles, whether equipped with fosible link- 
operated dampers or not, shall not be installed in 
these partitions. The supporting construction shall 
be protected to afford the required fireresistance 
rating of the wall supported in buildings of other 
than Types 2C, 3B and SB construction. 

Exceptions: 

1 . Smoke barriers are not required in interstitial 
spaces where such spaces are designed and 
constructed with ceilings that provide resistance 
to the passage of fire and smoke equivalent to 
that provided by the smoke barriers. 

2. Smoke barriers in occupancies in Use Group 
1-3 are permitted to be constructed of nominal 
0.10-inch-thick steel plate 

712.3 Doors: Doorways separating corridors in 
adjoining smoke compartments shall be equipped 
with a pair of swinging-type doors, each swinging in 
a direction opposite fi-om the other, and the 
minimum width of each door leaf shall be 44 inches 
(1118 mm) for corridors utilized for the movement 
of beds and 34 inches (864 mm) for other corridors. 
Other doors in smoke barriers shall be of the 
swinging type of required width. 



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Exceptions: 

1 . Horizontal sliding doors that comply with 
780 CMR 410.0 are permitted in smoke barriers 
in occupancies in Use Group 1-3. 

2. Horizontal sliding doors that comply with 
780 CMR 1017.4.4. 

712.4 Opening protectives: Doors in smoke barriers 
shall have & fire protection rating of not less than 20 
minutes in accordance with 780 CMR 716.0. 
Double means of egress corridor doors shall have 
vision panels of %-inch-thick labeled wired glass 
mounted in approved steel frames in accordance 
with 780 CMR 716.0. The doors shall close the 
openings with only the clearance necessary for 
proper operation under self-closing or automatic- 
closing operations and shall be without undercuts, 
louvers or grilles. Rabbets or astragals are required 
at the meeting edges of double means of egress 
doors, and stops are required on the head and jambs 
of all doors in smoke barriers. Positive latching 
devices are required on double means of egress 
corridor doors. 

Exceptions: 

1. In occupancies in Use Group 1-2, double 
means of egress cross-corridor doors shall be 
P/4-inch solid core wood or steel doors. Positive 
latching devices are not required on double 
means of egress cross-corridor doors, and center 
muUions are prohibited. 

2. Security glazing protected on both sides by 
an automatic sprinkler system shall be permitted 
in doors and windows in smoke barriers in 
occupancies in Use Group 1-3 . Individual panels 
of glazing shall not exceed 1,296 square inches 
(0.84 m^, shall be in a gasketed frame and 
installed in such a manner that the framing 
system will deflect without breaking (loading) 
glazing before the sprinkler system operates. 
The sprinkler system shall be designed to wet 
completely the entire surface of the affected 
glazing when actuated. 

712.4.1 Door closers: Doors in smoke barriers 
shall be provided with approved door hold-open 
devices of the failsafe type which shall release 
the doors, causing them to close upon the 
actuation of smoke detectors as well as upon the 
application of a maximum manual pull of 50 
pounds (244 N) against the hold-open device. 
Exception: Doors in smoke barriers in 
occupancies in Use Group 1-3 shall be self- 
closing or automatic-closing by smoke 
detection. 

712.5 Smoke damper: An approved damper 
designed to resist the passage of smoke shall be 
provided at each point a duct penetrates a smoke 
barrier. The damper shall close upon detection of 
smoke by an approved smoke detector located 
within the duct. 



Exceptions: 

1. In lieu of an approved smoke detector 
located within the duct, ducts that penetrate 
smoke barriers above smoke barrier doors that 
are required by 780 CMR 712.4 shall have the 
approved damper arranged to close upon 
detection of smoke by the local device designed 
to detect smoke on either side of the smoke 
barrier door opening 

2. Dampers at the smoke barrier in a fully 
ducted system are not required 

780 CMR 713.0 FLOOR/CEILING AND 
ROOF/CEILING ASSEMBLIES 

713.1 General: All floor and roof assemblies shall 
comply with the applicable provisions of 780 CMR 
and shall have a fireresistance rating of not less than 
the fireresistance rating required in 780 CMR 602.0. 

Exception: Dwelling unit separations in 
buildings of Types 2C, 3B and 5B construction 
shall have fireresistance ratings of not less than 
Vj hour in buUdings equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.2.1 or 780 CMR 906.2.2, 
provided that sprinklers are installed in all 
closets located against tenant separation walls 
and in all bathrooms 

713.1.1 Ceiling panels: Where the weight of 
lay-in ceiling panels, used as part of 
fireresistance rated floor/ceiling or roof/ceiling 
assemblies, is not adequate to resist an upward 
force of 1 psf (5 kg/m^), wire or other approved 
devices shall be installed above the panels to 
prevent vertical displacement under such upward 
force. 

713.1.2 Unusable space: In an assembly 
required to have a one-hour fireresistance rating, 
the ceiling membrane of a fireresistance rated 
assembly is not required to be installed where 
unusable space occurs below the assembly, or 
the flooring is not required to be installed where 
unusable space occurs above the assembly. 

713.2 Continuity: All floor/ceiling and roof/ceiling 
assemblies shall be continuous without openings or 
penetrations except as permitted by 780 CMR 713.0. 
Floor assemblies which are required to be 
fireresistance rated shall extend to and be tight 
against exterior walls, or other provisions shall be 
made for maintaining the fireresistance rating of the 
assembly at such locations Penetrations through a 
roof deck to the outside are permitted provided that 
the required fireresistance rating of the roof 
construction is maintained. All concealed spaces 
and openings shall he firestopped and draftstopped 
in accordance with 780 CMR 720.0. 

713.3 Floor opening enclosure: All floor openings 
connecting two or more stories shall be protected by 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

FIRERESISTANT MATERL\LS AND CONSTRUCTION 



a shaft enclosure that complies with 780 CMR 
710.0. 

Exceptions: A shaft enclosure is not required for 
any of the following floor openings: 

1 . A floor opening serving and contained within 
a single dwelling unit and connecting four stories 
or less. 

2. A floor opening which: 

2.1. Is not part of the required means of 
egress; 

2.2. Is not concealed within the building 
construction; 

2.3. Does not connect more than two stories; 

2.4. Is separated from other floor openings 
serving other floors by construction 
conforming to 780 CMR 710.3; and 

2.5. Is not open to a corridor in occupancies 
in Use Groups I and R, or is not open to a 
corridor on a floor not equipped throughout 
with an approved automatic fire suppression 
system in other use groups. 

3. A floor opening in a mall that complies with 
780 CMR 402.0. 

4. A floor opening between a mezzanine that 
complies with 780 CMR 505.0, and the floor 
below. 

5. An atrium that complies with 780 CMR 
404.0. 

6. A floor opening in an open parking structure 
that complies with 780 CMR 406.0. 

7. An approved masoiuy chimney where 
annular space protection is provided for in 
accordance with 780 CMR 720.6.4. 

8. A shaft enclosure for an escalator floor 
opening is not required where a shaft enclosure 
is not required for floor openings in accordance 
with 780 CMR 713.3 or where the building is 
equipped throughout with an automatic sprinkler 
system in accordance with 780 CMR 906.2.1 and 
the escalator opening is protected in accordance 
with 780 CMR 713.4.3.4 or 713.4.3.5. 

9. A floor opening that complies with 
780 CMR 410.5 in an occupancy in Use Group 
1-3. 

10. Noncombustible shafts connecting 
communicating floor levels in an occupancy in 
Use Group 1-3 where the area complies with 
780 CMR 410.5. Where additional stories are 
located above or below, the shaft shall be 
permitted to continue with fire and smoke 
damper protection provided at the fireresistance 
rated floor/ceiling assembly between the 
noncommunicating stories. 

11. A single floor opening containing a 
stairway which is not a required means of egress 
in an occupancy in Use Group B and complying 
with the following parameters: 

11.1. The stairway does not connect more 
than six floor levels. 

1 1 .2. The stairway does not connect with 
an exit access corridor. 



1 1 .3. The stairway floor opening shall not 
exceed 160 square feet (15 m^. 

11. 4. The stairway floor opening shall be 
protected in the same manner as an escalator 
floor opening complying with 780 CMR 
713.3 Exception 8, and 524 CMR. 

1 1 .5. The building is equipped throughout 
with an approved automatic sprinkler system 
in accordance with 780 CMR 906.2.1. 

713.4 Penetration protection: All penetrations of a 
floor/ceiling assembly or the ceiling membrane of a 
roof/ceiling assembly shall be protected by a shaft 
enclosure that complies with 780 CMR 710.0. 

Exceptions: 

1. Penetrations within and through a floor 
opening permitted to be unenclosed by 
780 CMR 713.3. 

2. Penetrations through assemblies required to 
be fireresistance rated and complying with 
780 CMR 713.4.1 or 780 CMR 713.4.2. 

3. Penetrations through assemblies without a 
required fireresistance rating and complying 
with 780 CMR 713.4.1 or 780 CMR 713.4.3. 

713.4.1 Through-penetration system: A shaft 
enclosure shall not be required where cables, 
cable trays, conduits, tubes or pipes penetrate a 
floor assembly and are protected with an 
approved through-penetration protection system 
tested in accordance with ASTM E814 listed in 
Appendix A. The positive pressure differential 
between the exposed and unexposed surfaces of 
the test assembly shall not be less than 0.0 1 -inch 
water gage (2.5 P). The system shall have an 
"F" rating and a "T" rating of not less than 1 
hour but not less than the required fireresistance 
rating of the assembly being penetrated. All 
penetrations through a ceiling that is an integral 
component of a fireresistance rated floor/ceiling 
or roof/ceiling assembly, shall comply with 
780 CMR 713.4.2. 

Exceptions: 

1. A "T" rating shall not be required for 
floor penetrations that are contained and 
located within the cavity of a wall. 

2. A "T" rating shall not be required for 
floor penetrations by pipe, tube and conduit 
that are not in direct contact with 
combustible material. 

713.4.2 Fireresistance rated assemblies: The 

required fireresistance rating of floor/ceiling and 
roof/ceiling assemblies shall be determined in 
accordance with ASTM El 19 listed in 
Appendix A. Except where permitted by 
780 CMR 713.4.2.1 through 713.4.2.3, 
penetrations for electrical, mechanical, plumbing 
and communication conduits, pipes and systems 
shall be installed in accordance with the 
approved ASTM El 19 rated assembly. In the 



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THE MASSACHUSETTS STATE BUILDING CODE 



case of ceilings that are an integral component of 
a fireresistance rated floor/ceiling or rooCceiling 
assembly, all penetrations shall be installed in 
accordance wiA the approved ASTM El 19 rated 
assembly or 780 CMR 713.4.2.3. 
Exceptions: 

1 . Outlet boxes and fittings are permitted, 
provided that such devices are listed for 
installation in fireresistance rated assemblies 
and are installed in accordance with the 
listing. 

2. Ceiling dampers shall not be required 
where fire tests have shown that such 
dampers are not necessary in order to 
maintain the fireresistance rating of the 
assembly. 

713.4.2.1 Noncombustible penetrations: 
Penetrations by noncombustible vents, 
chimneys, conduits, pipes and tubes through 
a fireresistance rated floor assembly which 
connect not more than two stories are 
permitted. Penetrations by noncombustible 
conduit, pipe and tubes through a fireresis- 
tance rated floor assembly which connect 
more than two stories are permitted provided 
that the aggregate area of the penetrating 
items shall not exceed one square foot (0.09 
m^) in any 100 square feet (9.3 m^) of floor 
area. In all cases, the annular space between 
the penetrating item and the assembly shall 
be protected in accordance with 780 CMR 
707.8. 

713.4.2.2 Air ducts: Penetrations by an air 
duct or plenum through a fireresistance rated 
floor assembly, which cormect not more than 
two stories, are permitted where a fire 
damper that complies with 780 CMR 7 1 7.0 
is installed at the floor line. A. fire damper is 
not required at penetrations of a rooCceiling 
assembly where ducts are open to the 
atmosphere. 

713.4.2 J Ceiling penetrations: In the case 
of ceilings that are an integral component of 
a fu'eresistance rated floor/ceiling or 
roof ceiling assembly, openings to accom- 
modate noncombustible conduits, pipes, 
tubes, electrical outlets or air ducts shall be 
permitted provided that the aggregate area of 
such ojjenings does not exceed 1 00 square 
inches (0.065 m^) in any 100 square feet (9.3 
m^) of ceiling area. The space around 
noncombustible conduits, pipes, tubes and 
electrical outlet boxes at the ceiling 
penetration shall be firestopped in 
accordance with 780 CMR 720.6.4 or shall 
be protected in accordance with 780 CMR 
709.7 or 780 CMR 713.4.1. For 



noncombustible air duct penetrations, an 
approved ceiling damper shall be installed at 
the ceiling line. Ceiling dampers shall be 
constructed in accordance with the details 
listed in a fireresistance rated design or shall 
be labeled to fiinction as a heat barrier for 
air-handling outlet/inlet penetrations in the 
ceiling of a fireresistance rated assembly. 

713.4 J Nonfireresistance rated assemblies: 

Penetrations of floor assemblies without a 
required fireresistance rating shall conform to 
780 CMR 713.4.3.1 through 713.4.3.3. All 
penetrations through the ceiling mfembrane of a 
roof assembly without a required fireresistance 
rating shall be protected in accordance with 
780 CMR 720.6.4. 

713.4J.1 Noncombustible penetrations: 
Penetrations by noncombustible vents, 
chimneys, conduits, pipes and tubes through 
unprotected floor assemblies which connect 
not more than three stories are permitted 
provided that the annular space between the 
penetrating item and the floor is protected in 
accordance with 780 CMR 720.6.4. 
713.4J.2 Air ducts: Penetrations by 
noncombustible air ducts through unprotect- 
ed floor assemblies which coimect not more 
than three stories are permitted provided that 
a fire damper complying with 780 CMR 
717.0 is installed at each floor line. 
713.4.33 Noncombustible or combustible 
penetrations: Penetrations by vents, 
chimneys, cables, wires, air ducts, conduits, 
pipes and tubes through an unprotected floor 
assembly which connect not more than two 
stories are permitted provided that the 
annular space is protected in accordance 
with 780 CMR 720.6.4. 
713.43.4 Escalators/automatic fire 
shutter: Escalators shall be equipped with a 
power-operated automatic shutter at every 
floor pierced thereby, constructed of 
approved noncombustible materials with a 
fire protection rating of not less than 1 'A 
hours. The shutter shall close immediately 
upon the automatic detection of fire and 
smoke by an approved device and shall 
completely shut off the well opening. The 
shutter shall operate at a speed of not more 
than 30 feet per minute (0.15 m/s) and shall 
be equipped with a sensitive leading edge to 
arrest the shutter's progress when in contact 
with any obstacle, and to continue the 
shutter's progress on release therefi'om. 
Refer to 780 CMR 713.3, Exception 8. 



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FIRERESISTANT MATERIALS AND CONSTRUCTION 



713.4.3.5 Escalators/water curtain: The 
area of the floor opening shall not exceed 
twice the horizontal projected area of the 
escalator and the opening shall not connect 
more than four stories in occupancies in 
other that Use Groups B and M and the 
opening shall be protected by a draft curtain 
and a closed sprinkler water curtain 
conforming to NFiPA 13 listed in 
Appendix A. Refer to 780 CMR 713.3, 
Exception 8 

780 CMR 714.0 ROOF CX)NSrrRUCnON 

714.1 General: Roofs shall be constructed of 
materials or assemblies of materials designed to 
afford the fireresistance rating required by Table 602 
as herein modified. 

714.2 Stadiums: The roof construction, including 
beams, trusses, framing, arches and roof decks. 



enclosing stadiums of Type 1 or Type 2 
construction, shall be of approved noncombustible 
materials without a specified fireresistance rating or 
of Type 4 construction. 

7143 Roofs 20 feet or higher: Where every part of 
the structural framework of roofs in buildings of 
Type 1 or Type 2 construction is 20 feet (6096 mm) 
or more above the floor inmiediately below, 
omission of all fire protection of the structural 
members is permitted, including the protection of 
trusses, roof framing and decking. 

714.4 Roof slabs, arches and decking: Where the 
omission of fire protection from roof trusses, roof 
framing and decking is permitted, roofs in buildings 
of Types 1 and 2 construction shall be constructed of 
noncombustible materials, or of fireretardant- treated 
wood as permitted in Table 602, without a specified 
fireresistance rating, or of Type 4 construction in 



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780 CMR - Sixth Edition 



136. 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

NON-TEXT PAGE 



136.2 780 CMR - Sixth Edition 12/12/97 (Effective 8/28/97) 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

FIRERESISTANT MATERIALS AND CONSTRUCTION 



buildings not over five stories or 65 feet (19812 mm) 
in height. 

714.5 Firestopping: Firestopping of ceiling and 
attic spaces shall be provided as required by 
780 CMR 720.0. 

780 CMR 715.0 FIRERESISTANCE 
RATING OF STRUCTURAL MEMBERS 

715.1 Requirements: The fireresistance rating of 
structural members and assemblies shall comply 
with the requirements for the type of construction 
and shall not be less than the rating required for the 
fireresistance rated assemblies supported, except as 
provided for in 780 CMR 71 1.4 for support of exit 
access corridor walls and tenant separation walls in 
covered mall buildings, and in 780 CMR 712.2 for 
support of smoke barriers. The maximum required 
fireresistance rating of structural members 
supporting j?/-e separation assemblies of tank storage 
areas as provided for in 780 CMR 418.3.2. 1 shall be 
two hours, but not less than required by Table 602 
for the building construction type. 

715.2 Protection of structural members Columns, 
girders, trusses, beams, lintels or other structural 
members which are required to have a fireresistance 
rating and which support more than two floors or 
one floor and roof, or support a loadbearing waO or 
a nonloadbearing wall more than two stories high, 
shall be individually protected on all sides for the 
full length or height with materials having the 
required fireresistance rating. All other structural 
members required to have a fireresistance rating 
shall be protected by individual encasement, by a 
membrane or ceiling protection as specified in 
780 CMR 713.0, or by a combination of both 

715.3 Embedments and enclosures: Pipes, wires, 
conduits, ducts or other service facilities shall not be 
embedded in the required fire protective covering of 
a structural member that is required to be 
individually encased. 

715.4 Impact protection: Where the fire protective 
covering of a structural member is subject to impact 
damage fi-om moving vehicles, the handling of 
merchandise or other activity, the fire protective 
covering shall be protected by comer guards or by a 
substantial jacket of metal or other noncombustible 
material to a height adequate to provide full 
protection, but not less than five feet (1524 mm) 
from the finished floor. 



715.5 Exterior structural members: Structural 
members located in exterior walls or along the outer 
lines of a building or structure shall be protected as 
required by Table 602 for exterior loadbearing walls 
for the type of construction involved and shall be 
protected against corrosion in accordance with 
780 CMR 2210.1. The interior faces of exterior 
structural members shall be protected with coverings 
of not less than the required fireresistance rating 
specified for interior structural members in Table 
602 Where a fireresistance rating is required in 
Table 602 for exterior loadbearing walls in buildings 
of Types 2C, 3B and 5B construction, the interior 
faces of any exterior structural member of such 
buildings shall be protected to provide a 
fireresistance rating not less than that required for 
exterior load- bearing walls. 

715.6 Bottom flange protection: Fire protection is 
not required for the bottom flange of lintels, shelf 
angles and plates which are not a part of the 
structural fi"ame or which have a span of six feet 
(1829 mm) or less. 

715.7 Stone lintels: Stone lintels on spans exceeding 
four feet (1219 mm) shall not be permitted, unless 
supplemented by fireresistance rated structural 
members or masonry arches of the required strength 
to support the superimposed loads. 

780 CMR 716.0 FIRE DOOR ASSEMBLIES 
716.1 Fire door assemblies: Approved fire door 
assemblies as defined in 780 CMR shall be 
constructed of any material or assembly of 
component materials which conforms to the test 
requirements of ASTM El 52 listed in Appendix A 
and the fire protection rating herein required in 
Table 716.1, unless otherwise specifically provided 
for in 780 CMR. 

716.1.1 Twenty-minute doors: Fire doors 
having a fire protection rating of 20 minutes 
shall be tested in accordance with ASTM El 52 
listed in Appendix A without the hose stream 
test 

716.1.2 Doors in exit enclosures: All doorway 
opening protectives for exit enclosures shall be 
labeled means of egress fire doors and shall 
have a maximum transmitted temperature end 
point of not more than 450°F (232°C) above 
ambient at the end of 30 minutes of standard fire 
test exposure. 



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137 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



Table 716.1 

OPENING PROTECTIVE FIRE 

PROTECTION RATING 



Type of assembly 



Required 

assembly 

rating (hour) 



Minimum 
opemng 
protection 
assembly 
(hour) 



Fire waUs and fire separation 4 

assemblies having a required 3 

fireresistance rating greater than 2 

one hour 1 Vi 



3 
3 

V/2 
l'/2 



Fire separation assembUes: 
Shaft and exit enclosure walls 
Other fire aeparation assemblies 



Fire partitions: 

Exit access corridor enclosure 






waU 


1 


Vs" 


Other fire partitions 


'/2 

1 





Note a. For testing requirements, see 780 CMR 716.1.1. 

716.2 Labeled protective assemblies: Allure door 
assemblies shall be labeled by an approved agency. 
Labeled protective assemblies that conform to the 
requirements of 780 CMR 716.0 or UL lOA, 14B 
and 14C for tin-clad fire door assemblies, and 
NFiPA 80 listed in Appendix A, shall be approved 
for use as provided for in 780 CMR. 

716.2.1 Labeling requirements: Fire doors 
shall have a label or other identification showing 
the name of the manufacturer, the^re protection 
rating and, where required for fire doors in exit 
enclosures by 780 CMRs 716.1.2 or 1014.8.3, 
the maximum transmitted temperature end point. 
Such label shall be approved and shall be 
permanently aflBxed. The label shall be applied 
at the fectory where fabrication and assembly are 
done. Inspection shall be made by an approved 
agency. 

716.2.2 Oversized doors: Approval of doors 
which cannot be labeled because of size shall be 
based on a certificate of inspection furnished by 
an approved testing agency for such oversized 
doors. The certificate shall state that the door 
conforms to the requirements of design, 
materials and construction, but has not been 
subjected to the fire test. 

716.3 Multiple doors in fire walls: Two doors, each 
with a. fire protection rating of VA hours, installed 
on opposite sides of the same opening in 3. fire wall, 
shall be deemed equivalent m fire protection rating 
to one three-hour ^re door. 

1\6A Glass panels: Wired glass panels shall be 
permitted in fire doors within the limitations of 



780 CMR 719.0 and as herein specifically 
prescribed. 

716.5 Door closing: Fire doors shall be self-closing 
or automatic-closing in accordance with the 
requirements of NFiPA 80 listed \n Appendix A and 
the requirements of 780 CMR 716.5.1 through 

716.5.4. 

716.5.1 Smoke-activated doors: Fire doors 
which are not self-closing and which protect 
openings in horizontal exits, exits or exit access 
corridors required to be of fireresistance rated 
construction shall be automatic-closing by the 
actuation of smoke detectors or by loss of power 
to the smoke detector or the hold-open device. 

716.5.2 Doors in pedestrian ways: Vertical 
sliding or vertical rolling steel fire doors in 
openings through which pedestrians travel shall 
not be automatic-closing by actuation of smoke 
detectors. 

Exception: Doors that are activated by 
smoke detectors arranged on an alarm 
verification circuit in accordance with 
780 CMR 918.7 

716.5.3 Swinging fire doors: The door closers 
for swinging fire doors that are not required to 
be automatic-closing by smoke detector 
activation in accordance with 780 CMR 716.5.1, 
shall be permitted to be activated by a single 
flisible link incorporated in the hold-open arm of 
an approved door closer where the ceiling is less 
than three feet (914 mm) above each side of the 
door opening 

716.5.4 Oosing time: Doors that are automatic- 
closing by automatic fire detectors or are self- 
closing shall not have a delay in the initiation of 
closing or reclosing of more than ten seconds. 

780 CMR 717.0 FIRE DAMPERS 
717.1 Approval: Fire dampers shall comply with 
the requirements of UL 555 listed in Appendix A 
and shall bear the label of an approved testing 
agency. Fire dampers shall be classified and 
identified in accordance with UL 555. Fire dampers 
installed in systems that continue to operate when 
smoke or heat from a fire is detected shall be labeled 
for installation in dynamic systems as required by 
UL 555. Fire dampers shall be installed in 
accordance with manufacturer's installation 
instructions. Fire dampers shall have the minimum 
fire protection rating specified in Table 717.1 for the 
type of penetration. 



138 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

FIRERESISTANT MATERIALS AND CONSTRUCTION 



Table 717.1 
FIRE DAMPER RATING 



Type of Penetration 


Minimum 

damper rating 

(hour) 


Fire partitions less than I hour 




Unprotected floor assemblies (see 
780 CMR 713.4.3.2) 


■/2 


Single membrane of a 1 -hour 
fireresistance rated assembly 




1 -hour fireresistance rated assembhes 


1 


2-hour fireresistance rated assembhes 


Wi 


3-hour or greater fireresistance rated 
assembhes 


3 



717.2 Where required: Fire clampers shall be 
provided at locations required by 780 CMR where 
air distribution system penetrate assemblies required 
to have a fireresistance rating. Where the 
installation of a.Jire damper will interfere with the 
operation of a required smoke control system in 
accordance with 780 CMR 921.0 or the operation of 
an exhaust system conveying hazardous materials as 
defined in the mechanical code listed in Appendix A, 
approved alternative protection shall be utilized. 

717.3 Access: Access shall be provided to fire 
dampers for inspection and servicing. 

780 CMR 718.0 FIRE WINDOWS 
ANDSEHJITERS 

718.1 Fireresistance rating: Approved assemblies 
oifire windows and fire shutters shall meet the test 
requirements of ASTM E163 listed in Appendix A. 
Fire windows shall be in the fixed closed position or 
be automatic-closing. 

718.1.1 Exception: Steel window fi-ame 
assemblies of %-inch (3 mm) minimum solid 
section or of not less than nominal 0.048-inch- 
thick formed sheet steel m&rrtoers fabricated by 
pressing, mitering, riveting, interlocking or 
welding and having provision for glazing with 
'/4-inch wired glass as required in 780 CMR 
719.0 where securely installed in the building 
construction and glazed with 14-inch labeled 
wired glass, shall be deemed to meet the 
requirements for a %-hour^re window assembly. 

718.2 Window mullions: All metal mullions which 
exceed a nominal height of 1 2 feet shall be protected 
with materials to afford the same fireresistance 
rating as required for the wall construction in which 
the protective is located. 

718.3 Swinging fire shutters: Where fire shutters of 
the swinging type are installed in exterior openings, 
not less than one row in every three vertical lows 
shall be arranged to be readily opened fi-om the 
outside, and shall be identified by distinguishing 



marks or letters not less than six inches (152 mm) 
high. 

718.4 Rolling fire shutters: Where fire shutters of 
the rolling type are installed, such shutters shall be 
of approved counter-balanced construction and 
capable of being readily opened fi^om the outside. 

780 CMR 719.0 WIRED GLASS 

719.1 General: Wired glass installed as an opening 
protective shall be tested in accordance with ASTM 
El 63 listed in Appendix A, shall bear the label of an 
approved agency and shall be installed in approved 
fi'ames. Wired glass panels shall conform to the size 
limitations set forth in Table 719.1. 

Table 719.1 

LIMITING SIZE* OF WIRED GLASS 

PANELS 



Opening fire 
protection rating 


Maximum area 
(square inches) 


Maximum 
height 
(mches) 


Maximum 
width 
(mches) 


3 hour 

1 '/a-hour doors in 

exterior walls 

















1 and 1 V2 hours 

%hoar 


100 
1295 


33 
54 


10 
54 


V3 hour 

Fire windows 


not limited 
U96 


not limited 
54 


not Umited 

54 



Note a. 1 Inch = 25.4 mm: 1 square inch = 0:0006452 

719.1.1 Fire wails: Wired glass in fire doors 
located in fire walls shall be prohibited except 
that where serving as a horizontal exit, a self- 
closing swinging door shall be permitted to have 
a vision panel of not more than 100 square 
inches (0.065 m^) without a dimension 
exceeding ten inches (254 mm). 

719.1.2 Fire separation assemblies: Wired 
glass vision panels shall not be installed in fire 
doors having a 1 Vi-hour fire protection rating 
intended for installation in fire separation 
assemblies, unless the glass panels are not more 
than 100 square inches (0.065 m^) in area. 

719.2 Exit and elevator protectives: Except where 
fire doors are specifically required by 780 CMR 4 to 
be solid in such locations where unusually hazardous 
conditions prevail, approved wired glass vision 
panels used in fire doors in elevator and stairway 
shaft enclosures shall be so located as to fiimish 
clear vision of the passageway or approach to the 
elevator or stairway and shall not exceed the size 
limitations specified in Table 719.1. 

719.3 Fire separation assemblies: Panels of Vi-inch 
wired glass shall not be installed in fire separation 
assemblies intended for subdividing purposes as set 
forth in 780 CMR 709.1 where the required 
fireresistance rating of the wall exceeds one hour. 



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139 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



The maximum size of such panels shall not exceed 
the limitations for a y4-hour door. 

780 CMR 720.0 FIRESTOPPE^G 
AND DRAFTSTOPPING 

720.1 General: To prevent the free passage of flame 
and products of combustion through concealed 
spaces or openings in the event of fire, provisions 
shall be made to provide effective firestops or 
draftstops as herein specified. 

720.2 Firestopping materials: All firestopping 
shall consist of approved noncombustible materials 
securely fastened in place. Firestops of approved 
noncombustible materials or of materials of two 
thicknesses of one-inch lumber with broken lap- 
joint, or one thickness of 23/32-inch wood structural 
panel with joints backed by 23/32-inch wood 
structural panel, or of two-inch lumber installed with 
tight joints, shall be installed in open spaces of wood 
framing. 

720.3 Draftstopping materials Draftstopping 

materials shall not be less than Vi -inch gypsum 
board, %-inch plywood or other approved materials 
adequately supported. 

720.4 Integrity: The integrity oia& firestopping and 
draftstopping shall be continuously maintained. 

720.5 Required inspection: Firestopping and 
draftstopping shall not be concealed from view until 
inspected and approved. 

720.6 Firestopping required: Firestopping shall be 
installed in the locations specified in 780 CMR 
720.6.1 through 720,6.7. 

720.6.1 Concealed wall spaces: Firestopping 
shall be installed in concealed spaces of stud 
walls and partitions, including fiirred or studded- 
ofiF spaces of masonry or concrete walls, and at 
the ceiling and floor or roof levels Firestopping 
is not required at the ceiling level of walls, 
partitions and flirred spaces constructed of 
noncombustible materials as defined by 
780 CMR 704.4. 

720.6.2 Connections between horizontal and 
vertical spaces: Firestopping shall be installed 
at all interconnections between vertical and 
horizontal spaces such as occur at sofiEits over 
cabinets, drop ceilings, cove ceilings and similar 
locations. 

720.6.3 Stairways: Firestopping shall be 
installed in concealed spaces between stairway 
stringers at the top and bottom of the run 

720.6.4 Ceiling and floor openings: Where 
permitted by Exception 7 of 780 CMR 713.3, or 
by 780 CMR 713.4.2.3 or lU A3, firestopping 
shall be installed at openings around vents. 



pipes, ducts, chimneys and fireplaces at ceiling 
and floor levels, with approved noncombustible 
materials. Factory built chimneys and fireplaces 
shall hefirestopped in accordance with UL 103 
and UL 127 listed in Appendix A Where 
ceilings or floors are required to be fireresistance 
rated, the openings around vents, pipes, ducts, 
chimneys and fireplaces shall be protected in 
accordance with the requirements of 780 CMR 
713.4 through 713.4.2.3. 

720.6.5 Architectural trim: Firestopping shall 
be installed in exterior cornices and other 
exterior architectural elements where permitted 
of combustible construction in 780 CMR 1406.0, 
or where erected with combustible frames, at 
maximum intervals of 20 feet (6096 mm). If 
noncontinuous, such elements shall have closed 
ends, with at least four inches (102 mm) of 
separation between sections. 

720.6.6 Combustible flnish and trim: 

Firestopping shall be installed in the space 
behind combustible trim and finish where 
permitted under 780 CMR and all other hollow 
spaces where permitted in fireresistance rated 
construction at ten-foot (3048 mm) intervals; or 
the space shall be solidly filled with approved 
noncombustible materials. 

720.6.7 Concealed sleeper spaces: Firestopping 
shall be installed in concealed spaces formed by 
floor sleepers in areas of not more than 100 
square feet (9.30 m^, or the space shall be 
solidify filled with approved noncombustible 
materials. 

720.7 Draftstopping required: Draftstopping shall 
be installed in buildings of Types 3, 4 and 5 
construction in the locations specified by 780 CMR 
720.7.1 and 720.7.2. 

7-20.7.1 Floors: Where ceilings are suspended 
below solid wood joists or suspended or attached 
directly to the bottom of open-web wood floor 
trusses, the space between the ceiling and the 
floor above shall be divided by draftstopping as 
specified in 780 CMR 720 7.1.1 through 
720.7.1.3. 

720.7.1.1 Use Groups R-1 and R-2 In 

occupancies in Use Groups R-1 and R-2, 

draftstopping shall be installed in line with 

tenant and dwelling unit separation walls 

where the walls do not extend to the 

underside of the floor sheathing above. 

Exception: Draftstopping is not required 

in buildings equipped throughout with an 

automatic sprinkler system installed in 

accordance with 780 CMR 906.2.1 or 

906.2.2, provided that automatic 

sprinklers are also installed in the 

combustible concealed space. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

FIRERESISTANT MATERIALS AND CONSTRUCTION 



720.7.1.2 Use Group R-3: In occupancies in 
Use Group R-3, the space shall be divided 
into approximately equal areas not greater 
than 500 square feet (46.5 m^). The 
draftstopping shall be installed parallel to the 
main framing members. 

Exception: Draftstopping is not required 

in buildings equipped throughout with an 

automatic sprinkler system installed in 

accordance with 780 CMR 906.2.1 or 

906.2.2, provided that automatic 

sprinklers are also installed in the 

combustible concealed space. 

720.7.L3 Other use groups: In all other use 

groups, draftstopping shall be installed so 

that horizontal areas do not exceed 1,000 

square feet (93 m^). 

Exception: Draftstopping is not required 
in buildings equipped throughout with an 
automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1 or 
906.2.2, provided that automatic 
sprinklers are also installed in the 
combustible concealed space above the 
ceiling. 

720.7.2 Attics and concealed spaces: Attics and 
concealed roof spaces shall be provided with 
draftstopping as. specified in 780 CMR 720 7.2. 1 
and 720.7.2.2. 

720.7.2.1 Use Group R: In occupancies in 
Use Group R, in attics, mansards, overhangs 
or other concealed roof spaces, draftstopping 
shall be installed above, and in line with, 
tenant and dwelling unit separation walls that 
do not extend to the underside of the roof 
sheathing above. 
Exceptions: 

1. Where corridor walls provide a tenant 
or dwelling unit separation, draftstopping 
shall only be required above one of the 
corridor wails. 

2. Flat roofs with solid joist construction 
are not required to be provided with 
draftstopping over tenant and dwelling 
unit separation walls if the joists form a 
draftstop. 

3. Draftstopping is not required in 
buildings equipped throughout with an 
automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1 or 
906.2.2, provided that automatic 
sprinklers are also installed in attics, 
mansards, overhangs and other 
concealed roof spaces of combustible 
concealed space. 

4. Draftstopping is not required in 
detached one- and two-ftimily dwellings. 

5. In occupancies in Use Group R-2 
which do not exceed four stories in 



height, the attic space shall be 
subdivided by draftstops into areas not 
exceeding 3,000 square feet (279 m") or 
above every two dwelling units, 
whichever is smaller. 
720.7.2.2 Other use groups: Draftstopping 
shall be installed in attics and concealed roof 
spaces, such that any horizontal area does 
not exceed 3,000 square feet (279 m ). 
Exceptions: 

1 . Flat roofs with solid joist construction 
are not required to be provided with 
draftstopping over tenant separation 
walls if the joists form a draftstop. 

2. Draftstopping is not required in 
buildings equipped throughout with an 
automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1 or 
906.2.2, provided that automatic 
sprinklers are also installed in attics and 
other concealed roof spaces of 
combustion construction. 

720.8 Ventilation: Ventilation of concealed roof 
spaces shall be maintained in accordance with 
780 CMR 1210.0. 

780 CMR 721.0 FmERESKlTVE 
REQUIREMENTS FOR PLASTER 

721.1 Thickness of plaster: The required thickness 
of fireresistance rated plaster protection shall be 
determined by the prescribed fire tests for the 
specified use group and type of construction and in 
accordance with the provisions of 780 CMR 2505.0 
for interior plastering and 780 CMR 2506.0 for 
exterior plastering. The thickness in all cases shall 
be measured fi-om the face of the lath where applied 
to gypsum lath or metal lath. 

721.2 Plaster equivalents: For fireresistive 
purposes, Vz inch (13 mm) of unsanded gypsum 
plaster shall be deemed equivalent to V* inch (19 
mm) of one-to-three sanded gypsum or one inch (25 
mm) of Portland cement sand plaster. 

721.3 Noncombustible furring: In buildings of 
Types 1 and 2 construction, plaster shall be applied 
directly on masonry or on approved noncombustible 
plastering base and furring. 

721.4 Double reinforcement: Except in solid 
plaster partitions, or where otherwise determined by 
the prescribed fire tests, plaster protection more than 
one inch (25 mm) in thickness shall be reinforced 
with an additional layer of approved lath embedded 
at least Va inch (19 mm) from the outer surface and 
fixed securely in place. 

721.5 Plaster alternatives for concrete: In 

reinforced concrete construction, gypsum or portland 



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141 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



cement plaster is permitted to be substituted for '/z 
inch (13 mm) of the required poured concrete 
protection, except that a minimum thickness of % 
inch (ten mm) of poured concrete shall be provided 
in all reinforced concrete floors and one inch (25 
mm) in reinforced concrete columns in addition to 
the plaster finish. The concrete base shall be 
prepared in accordance with 780 CMR 2506.0. 

780 CMR 722.0 THERMAL- AND 
SOU>fD-INSUlATEVG MATERIALS 

722.1 General: Insulating batts, blankets, fills or 
similar types of materials — other than fiberboard and 
foam plastic insulation — including vapor retarders 
and breather papers or other coverings which are 
incorporated in construction elements, shall be 
installed as required by 780 CMR 722.0. Fiberboard 
insulation shall be installed as required by 780 CMR 
2309.0, and foam plastic insulation shall be installed 
as required by 780 CMR 2603.0. 

722.2 Exposed installations: Such materials, where 
exposed as installed in rooms or spaces, including 
attics and crawl spaces of buildings of any type 
construction, shall have a flame spread rating of 25 
or less and a smoke-developed- rating of 450 or less 
when tested in accordance with ASTM E84 listed in 
Appendix A. Plenum installations shall comply with 



the requirements of 780 CMR 2805.0 and the 
mechanical code listed m Appendix A. 

722.3 Concealed installations: Insulating materials, 
where concealed as installed in buildings of any type 
of construction, shall have a flame spread rating of 
75 or less and a smoke-developed rating of 450 or 
less when tested in accordance with ASTM E84 
listed in Appendix A. 

lllJiA Facings: All vapor retarders, whether 
integral or applied separately, shall be installed 
on the warm side of the building element, and 
shall have a permeance not exceeding one perm. 
Where insulation materials are installed in 
concealed spaces (such as wall, floor or ceiling 
cavities), attics or crawl spaces in buildings of 
Types 3, 4 and 5 construction, the flame spread 
and smoke-developed rating limitations do not 
apply to facings, provided that the facing is 
installed behind and in substantial contact with 
the unexposed surface of the ceiling, floor or 
wall finish. 

722.4 Cellulosic insulation: Cellulosic insulation 
shall meet the requirements of CPSC 16 CFR, Parts 
1209 and 1404, listed \n Appendix A. 



142 



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2/7/y7 (Effective 2/28/97) 



CHAPTER 8 



INTERIOR FINISHES 



780 CMR 801.0 GENERAL 

801.1 Scope: Interior finish and trim of buildings 
shall conform to the requirements of 780 CMR 8. 
Interior finish shall include all wall, ceiling and floor 
finishes and wainscoting and paneling or other finish 
applied structurally or for acoustical treatment, 
insulation, decoration or similar purposes. 

801.2 Installation and classiflcation: All materials 
which are required to restrict the spread of flame or 
to be flameresistant under the provisions of 
780 CMR - including, but not limited to, interior 
finish materials, fireretardant-treated wood, tents and 
tarpaulins, and interior hangings and decorations 
shall meet the requirements for installation and 
classification as determined by the applicable test 
procedures listed in 780 CMR 8. 

780 CMR 802.0 DEFfNlTIONS 
802.1 General; The following words and terms 
shall, for the purposes of 780 CMR 8 and as used 
elsewhere in 780 CMR, have the meanings shown 
herein. 

Flame spread: The propagation of flame over a 
surface. 

Flame spread rating: The measurement of flame 
spread on the surface of materials or their 
assemblies as determined by the tests specified in 
780 CMR (see 780 CMR 803.0). 

Flameresistance: That property of materials or 
combinations of component materials which 
restricts the spread of flame as determined by the 
flameresistance tests specified in 780 CMR (also 
see 780 CMR 807.2). 

Floor finish The finish placed on top of the floor, 
slab or other structural floor element. 

780 CMR 803.0 INTERIOR FINISH 
AND TRIM 

803.1 Exposed construction: These requirements 
shall not be considered as requiring the installation 
of interior finish, but where construction or fire 
protection materials are exposed in the use groups 
specified in 780 CMR 803.4, the hazard fi-om rate of 
flame spread of such exposed materials shall not be 
greater than that of the interior finish permitted for 
such occupancy. 

803.1.1 Paper finish: The use of a surface finish 
of paper or of material that does not have a greater 
fire hazard than paper shall not be prohibited. 



provided that such finish does not exceed 1/28 
inch (1 mm) in thickness and is applied directly to 
a noncombustible base or substrate that conforms 
to the requirements of 780 CMR 23 10.0. 

803.1.2 Type 4 construction: Exposed portions 
of structural members complying with the 
requirements for buildings of Type 4 construction 
in 780 CMR 605.0 and 2304.0, shall not be 
subject to interior finish regulations. 

803.1.3 Window exception: Show windows in 
the first story of buildings are permitted to be 
constructed of any approved materials. 

803.2 Classification: All materials used for interior 
finish and trim shall be classified in accordance with 
ASTM E84 listed in Appendix A The 
classifications of interior finishes referred to herein 
correspond to flame spread ratings determined by 
ASTM E84 listed in Appendix A as follows: Class I 
flame spread, - 25; Class 11 flame spread, 26 - 75; 
Class m flame spread, 76 - 200. 

803.3 Materials: Materials shall only be installed as 
interior finish and trim as specifically provided for 
in 780 CMR for the occupancy of the space in which 
the material is installed. Installation of any material 
fox floor finish, interior finish and trim in a building 
of Type 1 or 2 construction within the scope 
permitted in 780 CMR 803.0 or in 780 CMR 806.0 
shall not declassify the building with respect to the 
type of construction classification. 

803.3.1 Foam plastics: Foam plastics shall not be 
installed as interior trim or finish except in 
compliance with 780 CMR 803.0 and 780 CMR 
2603.0. 

803.3.2 Smoke development: Interior wall and 
ceiling finish materials that have a smoke- 
developed rating greater than 450 when tested in 
accordance with ASTM E84 listed in Appendix A 
shall not be permitted. 

803.4 Required flame spread rating: Interior finish 
of walls and ceilings shall have a flame spread rating 
not greater than that designated by the class 
prescribed for the various use groups listed in Table 
803.4, when tested in accordance with 780 CMR 
803.2. 

803.4.1 Basements: In occupancies other than 
Use Group R-3, Class I or 11 interior finish shall 
be required in all basements or other underground 
spaces fi"om which there is not direct exit to the 
outside of the building, if subject to occupancy for 
any purpose other than storage or service 
facilities. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



803.4.2 Maximum flame spread: Interior finish 
materials with flame spread classifications greater 
than 200 shall not be installed in any room or 
space subject to human occupancy, except to such 
extent as specifically approved on the basis of a 
finding that such installation does not 
significantly increase the life hazard. 

803.4.3 Rooms and enclosed spaces; 

Requirements for rooms or enclosed spaces are 
based upon spaces enclosed in partitions of the 
building or structure, and where a fireresistanceis 
required for the structural elements, the enclosing 
partitions shall extend fi^om the floor to the 
ceiling. Partitions that do not comply with this 
shall be considered as enclosing spaces and rooms 
or spaces on both sides thereof shall be counted as 
one. In determining the applicable requirements 
for rooms or enclosed spaces, the specific 
occupancy thereof shall be the governing factor, 
regardless of the use group classification of the 
building or structure Where an automatic 
sprinkler system installed in accordance with 
780 CMR 906.2.1 or 906.2.2 is installed 
throughout a building. Class 11 or HI interior 
finish shall be permitted where Class I or 11 
materials, respectively, are required in Table 
803.4. 

Table 803.4 
INTERIOR FINISH REQUIREMENTS^ 





Required 








vertical 


Corridors 


Rooms or 


Use Group 


exits and 


providing 


enclosed 




passage- 


exit access 


spaces 




ways 






A-1. A-2,A-3 


I 


f 


n" 


A-4,8,E,F,1-1, 




n 


in 


:R-l,R-a 




n 




W;Sim,^'''': 




H 




h 


h 


h 


1-2 




I 


r 


1-3 




I 


ni 


M: \sms. 




. li 


-n' 


ceSiags 




n 


R-3 


ni 


ni 


ffl 


s 


n 


n 


m 



Note a. For requirements applicable to rooms and 
enclosed spaces, see 780 CMR 803.4.3. 

Note b. Class HI interior finish materials are permitted 
in places of assembly with a capacity of 300 persons or 
less. 

Note c. Class in interior finish materials are permitted 
for wainscoting or paneling for not more than 1,000 
square feet (93m-) of applied surface area in the grade 
lobby where apphed directly to a noncombustible base or 
over fiirring strips applied to a noncombustible base and 
firestopped as required by 780 CMR 804.0. 

Note d. Class UI interior finish materials are permitted 
in mercantile occupancies of 3,000 square feet (279m ) 
or less gross area occupied for sales purposes on the 
street floor only (balcony permitted). 

Note e. Lobby areas shall not be less than Class II 



Note f. Where building height is over two stories. 
Class n shall be required. 

Note g. For the classifications of interior finishes 
referred to herein, see 780 CMR 803.2. For intenor 
finish requirements for exposed insulation, see 780 CMR 
722.2. 

Note h. Walls and ceilings shall be a minimum of 
Class 11 materials in individual rooms of not more than 
four persons in capacity Where a building is equipped 
throughout with an automatic sprinkler system installed 
in accordance with 780 CMR 906.2.1 the minimum 
requirement for interior finish shall be Class II 

Note i. In Use Groups A, 1-2 and 1-3, Class 11 interior 
wall finish matenal shall be permitted as wainscoting 
extending not more than 48 inches (1219 mm) above the 
floor in corridors providing exit access. 

803.5 Interior trim: Baseboards, chair rails, 
moldings, trim around openings and other interior 
trim, not in excess of 10% of the aggregate wall and 
ceiling areas of any room or space, shall be of Class 
I, n or ni materials 

803.6 Carpet and carpet-like wall coverings: 

Textile wall coverings having a napped, tufi;ed, 
looped, woven, nonwoven or similar surface, shall 
comply with the following: 

1 Such materials shall have a Class I flame 
spread classification and be installed only in 
rooms or areas protected by an automatic 
sprinkler system installed in accordance with 
780 CMR 9; or 

2 Such materials shall be tested in accordance 
with an eight-foot by 12-foot by eight-foot high 
(2438 mm by 3658 mm by 2438 mm) room/comer 
fire test procedure utilizing a product-mounting 
system, including adhesive, representative of 
actual installation. Prior to testing, the sample 
shall be conditioned at 70°F (2rC) ± 5% and at 
a relative humidity of 50% ± 5% until the sample 
reaches a rate of weight change of less than 0.1% 
per day. The product shall be exposed to a flame 
fi-om a gas diffusion burner for 15 minutes The 
fire exposure shall be 40 kW for the first five 
minutes, followed by an exposure of 1 50 kW for 
an additional ten minutes Such tests shall 
demonstrate that a product will not spread fire to 
the edge of the specimen or cause flashover in the 
test room. 

803.7 Design load: Interior wall finish materials 
shall be capable of resisting the horizontal load 
specified in 780 CMR 1615.4 

780 CMR 804.0 APPUCATION OF 
INTERIOR FINISH 

804.1 Attachment: Where interior finish is 
regulated by the requirements of 780 CMR 8, 
interior finish materials shall be applied or otherwise 
fastened in such a manner that such materials will 
not readily become detached when subjected to 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

INTERIOR FINISHES 



room temperatures of 200°F (93 °C) for not less than 
30 minutes. 

804.2 Fireresistive and noncombustible 
construction: Interior finish materials installed on 
walls, ceilings or structural elements which are 
required to provide a fireresistance rating or to be of 
noncombustible construction, shall comply with the 
provisions of 780 CMR 804.2.1 or 804.2.2. 

804.2.1 Application to structural elements: 

Interior finish materials applied to walls, ceilings 
or structural elements shall be applied directly 
against the exposed surface of such structural 
elements or to flirring attached to such surfaces. 
In concrete or masonry construction, furring of 
wood or any other material of similar combustible 
characteristics is permitted. All concealed spaces 
created by fiirring shall h&firestopped at not more 
than ten-foot (3048 mm) intervals in any direction 
(see 780 CMR 720.6.6). 

804.2.2 Set-out construction: Where the interior 
finish is set out or dropped distances greater than 
Wi inches (44 mm) from the surface of such 
elements, only material of which both faces 
qualify as Class I shall be installed. 

Exceptions: 

1. In buildings equipped throughout with an 
automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1 or 906.2.2, 
Class 11 finish materials shall be permitted 
provided that automatic sprinklers are also 
installed in combustible concealed spaces 
behind the interior finish. 

2. Class II or III materials shall be permitted 
where attached to a backing that complies with 
780 CMR 804.3 or to flirring applied directly 
to such backing as provided for in 780 CMR 
804.2.1. 

804.3 Class 11 and m materials: Class H and III 
interior finish materials which are less than Vt inch 
in thickness shall be applied directly against a 
noncombustible backing or a backing that complies 
with the requirements of 780 CMR 2310.0, unless 
the tests under which such material has been 
classified were made with the materials suspended 
from the noncombustible backing. The backing 
material shall provide a continuous surface 
completely behind the finish. Where the backing 
does not constitute an integral part of the structural 
elements or system, the backing shall be attached 
directly to the structural elements or to the furring as 
required for the application of finish in 780 CMR 
804.2, or shall be suspended from the structural 
members at any distance and all concealed spaces 
created thereby shall be firestopped in accordance 
with 780 CMR 720.0. 

804.4 Type 4 construction: Interior finish materials 
shall be applied directly to the wood members and 



decking of buildings of Type 4 construction, or to 
fiirring strips applied to such members or wood 
decking as provided for in 780 CMR 804.2. 1 . 

780 CMR 805.0 FLOOR FINISH 

805.1 General: Finished floors or floor covering 
materials of a traditional type, such as wood, vinyl, 
linoleum, terrazzo and other resilient floor covering 
materials, are exempt from the requirements of 
780 CMR 805.0. Floor coverings judged by the 
code official to represent an unusual hazard shall 
meet the requirements of 780 CMR 805.0. 

805.2 Classification: Intmor floor finish required 
by 780 CMR 805.3 to be of Class I or Class H 
materials shall be classified in accordance with 
ASTM E648 listed in Appendix A. The 
classifications referred to herein correspond to the 
classifications determined by ASTM E648 listed in 
Appendix A as follows: Class I, 0.45 watts/cm-; 
Class n, 0.22 watts/cml 

805.2.1 Test report: All carpet required by 
780 CMR 805.0 to meet critical radiant flux 
limitations in accordance with 780 CMR 805.2 
shall be tested by an approved agency. A copy of 
the test report identifying and representing the 
style to be installed shall be provided to the code 
official upon request. The test report shall 
identify the carpet by manufacturer (or supplier) 
and style name, and shall be representative of the 
current construction of the carpet. 

The carpet shall be identified as to 
manufacturer (or supplier) and style by a hang tag 
or other suitable method, which shall indicate the 
classification of the material based upon the 
limitations specified in 780 CMR 805 2. 

805.3 Required classification: IntenoT floor finish 
in vertical exits, exit passageways and exit access 
corridors shall not be less than Class I in Use Group 
1-2 and not less than Class II in Use Groups A, B, E, 
I-l, 1-3, M, R-1 and R-2. In all other areas, the 
intenoT floor finish shall comply with the DOC FF-1 
"pill test" (CPSC 16 CFR, Part 1630) listed in 
Appendix A. 

Exception: Where a building is equipped 
throughout with an automatic sprinkler system in 
accordance with 780 CMR 906.2. 1 or 906.2.2, 
Class II materials are permitted in any area where 
Class I materials are required and materials 
complying with the DOC FF-1 "pill test" (CPSC 
16 CFR, Part 1630) listed in Appendix A are 
permitted in any area where Class II materials are 
required. 

805.4 Rooms and enclosed spaces: Requirements 
for rooms or enclosed spaces are based upon the 
spaces being enclosed with partitions extending from 
the floor to the ceiling. Where partitions do not 
satisfy this criterion, the room or space is considered 



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THE MASSACHUSETTS STATE BUILDING CODE 



part of the corridor. 

805.5 Other materials: All carpet manufactured for 
sale in the United States is required by federal 
regulations to pass the DOC FF-1 "pill test" (CPSC 
16 CFR, Part 1630) listed in Appendix A If a 
material other than carpet is installed, the material 
shall be shown to be at least as resistant to flame 
propagation as a material which passes DOC FF-1 
(minimum critical radiant flux of 0.04 watts/cm^). 

780 CMR 806.0 COMBUSTIBLE MATERIALS 

PERMrriED IN FLOORS OF TYPES 1 AND 2 

CONSTRUCnON 

806.1 General: Except as provided for in 780 CMR 

1014.0 for stairways and in 780 CMR 412.0 for 
stages and platforms, combustible materials installed 
in or on floors of buildings of Types 1 and 2 
construction shall be as herein specified. 

806.2 Sleepers, bucks and grounds: Floor sleepers, 
bucks, nailing blocks and grounds shall not be 
constructed of combustible materials, unless the 
space between the fireresistance rated floor 
construction and the flooring is either solidly filled 
with approved noncombustible materials or 
firestopped in accordance with 780 CMR 720.6.7, 
and provided that such open spaces shall not extend 
under or through permanent partitions or walls. 

806.3 Flooring: Wood finish flooring is permitted to 
be attached directly to the embedded or firestopped 
wood sleepers, and shall be permitted where 
cemented directly to the top surface of approved 
fireresistance rated construction or directly to a 
wood subfloor attached to sleepers as provided for in 
780 CMR 806.2. Combustible insulating boards not 
more than Vz inch thick and covered with approved 
finished flooring are permitted for sound deadening 
or heat insulating where attached directly to a non- 
combustible floor assembly or to wood subflooring 
attached to sleepers as provided for in 780 CMR 
806.2. 



780 CMR 807.0 INTERIOR HANGCVGS 
AND DECORATIONS 

807.1 Decorative material restrictions: In 

occupancies in Use Groups A, E, 1-2, 1-3 and R-l, all 
curtains, draperies, hangings and other decorative 
materials suspended fi-om walls or ceilings shall be 
noncombustible or be maintained flameresistant in 
accordance with 780 CMR 807.2 as herein specified 
and 527 CMR 21. 00 as listed in Appendix A 

807.1.1 Noncombustible: The permissible 
amount of non-combustible decorative hangings 
shall not be limited. 

807.1.2 Flameresistant: The permissible amount 
of flameresistant decorative hangings shall not 
exceed 1 0% of the total wall and ceiling area. 

807.2 Acceptance criteria: Where required to be 
flameresistant under the provisions of 780 CMR, all 
materials used for artistic enhancement, decorations, 
draperies, curtains, scenery and hangings shall 
comply with 780 CMR 807.0. If treated to be 
flameresistant, these materials shall not generate 
smoke more dense than that given off by untreated 
wood or paper burning under comparable conditions 
when tested in accordance with both the small-scale 
and large-scale tests in NFiPA 701 listed in 
Appendix A. 

807.2.1 Limitation of approval: All approvals of 
organic decorative material shall be limited to one 
year. The owner or the owner's authorized agent 
shall file an affidavit with the code official which 
certifies that the process and materials utilized 
comply with 780 CMR and which states the date 
of treatment and the warranted period of 
effectiveness of the process. 

807.2.2 Field test for decorative materials: 

Where documented certification of 
flameresistance is not provided, the code official 
shall subject decorative materials that are required 
to be flameresistant to a field test in accordance 
with Chapter 10 of NFiPA 701 listed in 
Appendix A. 

807.2.3 Replacement of defective materials: All 

treated hangings, draperies, canvas and other 
decorative and tent materials which fail to 
conform to the field test requirements shall be 
retreated or replaced by an approved installation. 



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2/7/97 (Effective 2/28/97) 



CHAPTER 9 



FIRE PROTECTION SYSTEMS 
(This Chapter is Entirely Unique to Massachusetts) 



780 CMR 901.0 GENERAL 
901.1 Scope: The provisions of 780 CMR 9 shall 
specify v/hevefire protection systems are required 
and shall apply to the design, installation, 
maintenance and operation of all fire protection 
systems in all buildings and structures. 

901.1.1 Seismic Requirements: All "required" 
and "non-required" fire protection systems shall 
be installed in accordance with the Seismic 
Criteria requirements of 780 CMR 1612.7, 
Architectural, Mechanical and Electrical 
Components and Systems. 

901 Jl Required systems: AH fire protection systems 
required by 780 CMR shall be installed, repaired, 
operated and maintained in accordance with this 
code and the applicable reference standards listed in 
Appendix A. All required fire suppression and 
standpipe systems shall be provided with at least one 
automatic supply of fire-extinguishing agent of 
adequate pressure, capacity and reliability to 
perform the fimction intended. 

9013 Nonrequired systems: Any fire protection 
system or portion thereof not required by 780 CMR 
shall be permitted to be finished for partial or 
complete protection provided that such installed 
system meets applicable requirements of 780 CMR. 
A building permit shall be required for systems 
installed pursuant to 780 CMR 901.3 

901.4 Maintenance: All water based fire protection 
systems shall be maintained in accordance with 
NFPA 25 as listed in Appendix A. All other ^re 
protection systems shall be maintained in accordance 
with the requirements of the applicable reference 
standards and standards listed in Appendix A. The 
owner, tenant or lessee of every building or structure 
shall be responsible for the care and maintenance of 
all fire protection systems, including equipment and 
devices, to ensure the safety and welfare of the 
occupants. Fire protection systems shall not be 
disconnected or otherwise rendered unserviceable 
without first notifying the local fire department in 
accordance with M.G.L. c. 148 § 27A. 

When installations of fire protection systems are 
interrupted for repairs or other necessary reasons, 
the owner, tenant or lessee shall immediately advise 
the local fire department and shall diligently 
prosecute the restoration of the protection. 

901.5 Threads: All threads provided for fire depart- 
ment connections to sprinkler systems, standpipes. 



yard hydrants or any other fire hose connection shall 
be compatible with the connections used by the local 
fire department. 

901.6 Signs: All signs required to identify fire 
protection equipment, equipment rooms and 
equipment locations shall be constructed of durable 
materials, be permanently installed and be readily 
visible. Letters and numbers shall contrast with the 
sign background, shall be at least two inches in 
height and shall have an appropriate width-to-height 
ratio to permit the sign to be read easily from a 
distance of ten feet. The sign and location shall be 
approved by the local fire department. 

Exception: See also 780 CMR 906.8 for entrance 
doors to sprinkler control valve rooms and 
780 CMR 915.8 for fire department coimections. 

780 CMR 9010 DEFIMTIONS 
902.1 General: The following words and terms 
shall, for the purposes of 780 CMR 9 and as used 
elsewhere in 780 CMR, have the meanings shown 
herein. 

Alarm verification: A feattire of automatic fire 
detection systems to reduce unwanted alarms 
wherein automatic fire detectors report alarm 
conditions for a minimum f)eriod of time, or 
confirm alarm conditions within a given period, 
after being automatically reset to be accepted as a 
valid alann initiation signal (see 780 CMR 91 8.0). 

Approval/Permit To Install: The term refers to 
permits outside the jurisdiction of the building 
official, issued under authority of M.G.L. c. 148, 
§10Aor527CMR. 

Authority Having Jurisdiction: The term 
"Authority Having Jurisdiction" as used in the 
NFPA Standards as referenced in 780 CMR 9, 
shall mean the building official for enforcement of 
780 CMR and the BBRS for interpretation, waiver 
or variences (see 780 CMR 122.0; see official 
interpretation number 35-94 Usted in Appendix B) 

Automatic: As applied to fire protection devices, 
automatic refers to a device or system that pro- 
vides an emergency function without the necessity 
of human intervention and activated as a result of 
a predetermined temperature rise, rate of tempera- 
ture rise or increase in the level of combustion 
products - such as incorporated in an automatic 
sprinkler system, automatic fire door, etc. 



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147 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



Automatic fire suppression system: An engineered 
system using carbon dioxide (COj), foam, wet or 
dry chemical, a halogenated extinguishing agent, 
or an automatic sprinkler system to detect 
automatically and suppress a fire through fixed 
piping and nozzles (see 780 CMR 904.0). 

Construction Documents: As defined in 780 CMR 2. 

Deluge system: An automatic sprinkler system 
consisting of open sprinklers with water supply 
valves activated by a separate automatic detection 
system (see 780 CMR 908.0). 

Detector, heat; An alarm-initiating device that 
detects abnormally high temperature or rate of 
temperature rise (see 780 CMR 918.0). 

Detector, smoke: An alarm-initiating device that 
detects the visible or invisible particles of 
combustion (see 780 CMR 918.0). 

Emergency Voice/alarm signaling system: A 

system that provides, to the occupants of a 
building, dedicated manual or automatic facilities, 
or both, for originating and distributing voice 
instructions, as well as alert and evacuation 
signals that pertain to a fire emergency (see 
780 CMR 917.0). 

Fire alarm box, manual: A manually operated 
alarm-initiating device that activates a fire 
protective signaling system (see 780 CMR 917.0). 

Fire command station ( Fire command center): 

The principal location where the status of the 
detection, alarm, conmiunications and control 
systems is displayed, and fi-om which the 
system(s) has the capability for manual control 
(see 780 CMR 403.7 and 917.9). 

Fire Department Designee: An individual 
authorized by the chief of the fire department to 
review and approve fire protection system plans 
and installation. 

Fire detector, automatic: An alarm-initiating device 
that automatically detects heat, smoke or other 
products of combustion (see 780 CMR 918.0). 

Fire Protection Construction Documents: 

Documents containing the requirements of 
780 CMR 903.1.1, 903.1.2, 903.1 .3. 

Fire protection system: Devices, equipment and 
systems used to detect a fire, activate an alarm, 
suppress or control a fire, or any combination 
thereof 

Fire Protective Signaling System (Fire Alarm 
System): A system or portion of a combination 



system consisting of components and circuits 
arranged to monitor and annunciate the status of 
fire alarm or supervisory signal initiating devices 
and to initiate appropriate response to those 
signals. 

Household Fire Warning System: A household 
fire warning system consists of single or multiple 
station detectors or a listed control unit with 
automatic fire detectors and occupant notification 
appliances. The household fire warning system 
serves only one dwelling unit, patient room, hotel 
room or other single area depending on use group 
requirements in 780 CMR 919.1 through 919.3 

Installing Contractor:An individual or firm duly 
licensed to install fire protection systems. (See 
780 CMR 903.3) 

• Automatic Sprinklers Systems - M.G.L. 
c. 146, §§ 81 through 85A, 528 CMR 11.00 
and 12.00 

• Fire Extinguishing systems - M. G.L. c. 148, 
§§ 58, 527 CMR 23.00 

• Fire Alarm Systems - M.G.L. c. 141, §§ I 
through 10, 237 CMR 1.00 through 6.00 

Maintenance of Fire Protections Systems: 

Replacement or repair of any component or 
components of a fire protection system, where 
such does not affect system performance and 
compatibility. (Also see Modifications, 

Alterations, Additions or Deletions to Fire 
Protection Systems). No building permit is 
required for maintenance. Other permits, 
however, may be required pursuant to M.G.L. 
C.148, §27Aand527CMR. 

Modifications, Alterations, Additions or Deletions 
to Fire Protection Systems: Any changes which 
affect the performance of the fire protection 
system. (Also see maintenance). Such changes 
require a building jjermit and are subject to other 
permitting requirements pursuant to M.G.L. 
c. 148, § 27 A. 

Master Box: A municipal fire alarm box that may 
also be operated by remote means. 

Municipal Fire Alarm System: A system of alarm 
initiating devices, receiving equipment, and 
connecting circuits (other than a public telephone 
network) used to transmit alarms from street 
locations to the public fire service 
communications center. 

Preaction system: A fu'e sprinkler system employing 
automatic sprinklers attached to a piping system 
containing air with a supplemental fire detection 
system installed in the same areas as the 
sprinklers. Actuation of the fire detection system 
automatically opens a valve that permits water to 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

FIRE PROTECTION SYSTEMS 



flow into the sprinkler piping system and to be 
discharged from any open sprinklers (see 
780 CMR 906.9.6). 

Proprietary supervising station: Refer to the 
definition in chapter 1 of NFPA-72 and to 
further details as identified in chapter 4 of 
NFPA-72 as listed in Appendix A. 

Registered Professional Engineer: A Registered 
Professional Engineer registered by the Board of 
Registration of Professional Engineers and of 
Land Surveyors in accordance with M.G.L. c. 112, 
§§ BID through 8 IT and 250 CMR (see 780 CMR 
903. 1.3 and 903.5). 

Remote station fire alarm system supervising 
station: Refer to the definitions in chapter 1 of 
NFPA-72 and to further details as identified in 
chapter 4 of NFPA-72 as listed in Appendix A. 

Shop Drawings: Scaled detailed working drawings 



(system layout) and equipment specifications (cut 
sheets) indicating all information in accordance 
with requirements of the applicable NITA 
Standards for the specific fire protection systems 
to be installed in accordance with the Registered 
Professional Engineer's plans and specifications. 

Smoke detector, multiple station: Single-station 
smoke detectors that are capable of being 
interconnected such that actuation of one causes 
all integral or separate audible alarms to operate 
(see 780 CMR 919.0). 

Smoke detector, single station: An assembly 
incorporating the detector, the control equipment 
and the alarm-sounding device in one unit, which 
is operated from a power supply either in the unit 
or obtained at the point of installation (see 
780 CMR 919.0). 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

FIRE PROTECTION SYSTEMS 



Smoke detector, system type: A smoke detector 
designed to be conneted to a fire alann control 
panel. 

Sprinkler: A device, connected to a water supply 
system, that discharges water in a specific pattern 
for extinguishment or control of fire (see 
780 CMR 906.0). 

Sprinkler system, automatic: A sprinkler system, for 
fire protection purposes, is an integrated system of 
underground or overhead piping designed in 
accordance with fire protection engineering 
standards. The system includes a suitable water 
supply. The portion of the system above the 
ground is a network of specially or hydraulically 
designed piping installed in a building, structure 
or area, generally overhead, and to which 
automatic sprinklers are connected in a systematic 
pattern. The system is usually activated by heat 
from a fire and discharges water over the fire area 
(see 780 CMR 906.0). 

Sprinkler system, limited area: An automatic 
sprinkler system consisting of not more than 20 
sprinklers within a fire area (see 780 CMR 
907.0). 

Standpipe system: A standpipe system is a fire 
protection system consisting of an arrangement of 
piping, valves, hose outlets and allied equipment 
installed in a building or structure (see 780 CMR 
914.0). 

Supervisory device: An initiating device used to 
monitor the conditions that are essential for the 
proper operation of automatic fire-protection 
systems (i.e., switches used to monitor the 
position of gate valves, a low air-pressure switch 
on a dry-pipe sprinkler system, etc.) (see 
780 CMR 923.0). 

U.L. Listed or FM approved central station service: 
Central station service as defined in Chapter 1 of 
NFPA-72 and as further identified in chapter 4 
of SEP A 72 as listed in Appendix A. 

Water supply, automatic: A water supply that is not 
dependent on any manual operation, such as 
making connections, operating valves or starting 
pumps (see 780 CMR 914.5). 

780 CMR 903.0 FERE PROTECTION 
SYSTEMS APPROVAL/ACCEPTANCE 

903.1 Required: Complete fire protection 
construction documents shall be submitted in 
accordance with 780 CMR 1 10 and a building permit 
obtained prior to the installation of all "required" or 
"non required" fire protection systems, including 
modifications, alterations, additions or deletions to 



an existing fu-e protection system. The fire 
protection construction documents shall contain 
sufficient information to completely describe the fire 
protection systems, including operational features. 
The information required pursuant to 780 CMR 
903.0 shall include, where required, the items listed 
in 780 CMR 903.1.1: 

Exception 1: Maintenance; no building permit 
required. 

Exception 2: For modifications, alterations, 
additions or deletions which do not affect system 
performance or compatibility; no building permit 
is required unless otherwise directed by the 
Building Official (Note also refer to M.G.L. 
c.148, §27A). 

903.1.1 Fire Protection Construction 
Documents: 

1. a. Basis (methodology) of design for the 
protection of the occupancy and hazards for 
compliance with 780 CMR and applicable 
NFPA Standards, in the form of a narrative 
report. 

b. Sequence of operation of all fire 
protection systems and operation in the form 
of a narrative report. 

c. Testing criteria to be used for final 
system acceptance in the form of a narrative 
report. 

2. Building and site access for fire fighting 
and/or rescue vehicle(s) and personnel. 

3. Fire hydrant(s) location and water supply 
information. 

4. Type/description and design layout of the 
automatic sprinkler system(s). 

5. Automatic sprinkler system(s) control 
equipment location. 

6. Type/description and design layout of the 
automatic standpipe system(s). 

7. Standpipe system hose valve(s) type and 
location. 

8. Fire department Siamese connection type(s) 
and location. 

9. Type/description and design layout of the 
fire protective signaling system(s). 

10. Fire protective signaling system(s) control 
equipment and remote annunciator location. 

1 1 . Type/description and design layout of the 
smoke control or exhaust system(s). 

12. Smoke control or exhaust system(s) 
control equipment location. 

13. Building life safety system features 
(auxiliary functions) required to be integrated 
as part of the fire protective signaling 
system(s). 

14. Type/description and design layout of the 
fire extinguishing system(s). 

15. Fire extinguishing system(s) control 
equipment location. 



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1 6. Fire protection system(s) equipment room 
location. 

17. Fire protection system(s) equipment 
identification and operation signs. 

18. Fire protection system(s) alarm/ 
supervisory signal transmission method and 
location. 

903.1.2 Plans: All fire protection system plans 
shall contain sufficient information to identify the 
occupancy, hazards, system and equipment 
arrangements, system and equipment sizing, 
systems specifications, systems sequence(s) of 
operation and design/engineering calculations. 

903.L3 Design: All fire protection systems and 
fire protection system operation including 
building and site features as identified in 
780 CMR 903.1 1 shall be designed and specified 
by a qualified Registered Professional Engin- 
eerfijexcept as provided in M.G.L. c. 143, § 54A 
and any profession or trade as provided in M.G.L. 
c. 112, §60L and M.G.L. c. 112, §81R All plans 
shall bear the original seal and signature of the 
Registered Professional Engineer(s), except as 
provided in M.G.L. c. 143, § 54A and any 
profession or trade as provided in M.G.L. c. 112, 
§ 60L and M.G.L. c. 112, § 81R Specifications 
shall include requirements for the preparation of 
shop drawings when required by 780 CMR or 
applicable NFPA Standards. The Registered 
Professional Engineer(s) or other legally 
recognized professional (M.G.L. c. 112, § 81R) 
shall be responsible for the review and certify that 
all shop dravsdngs conform to the approved fire 
protection construction documents as submitted 
for the building permit and approved by the 
building official. 

903. L4 As-built plans: In accordance with the 
applicable referenced standards, as-built plans 
shall be prepared by the contractor responsible for 
the installation of the fire protection system for 
the following occupancies: 

(a) High-rise buildings 

(b) Buildings and structures of Use Group A 
with a total occupant load exceeding 1000. 

(c) Buildings and structures of Use Group H. 

(d) Use Group 1-2 and 1-3 except 1-2 Uses 
provided for in 780 CMR 424. 

(e) Bulk Merchandising/Retail occupancies 
(See 780 CMR 416.0). 

As-built plans shall be provided to the owner 
upon completion. 

903.LS Safeguarding Construction: The^re 
protection construction documents shall provide 
specifications for conformance to 780 CMR 33 
and NFPA-241 listed in Appendix A in order to 
safeguard against fires during construction, 
alterations and demolition of all buildings and 
structures regulated by 780 CMR. 



903.2 Authority: In accordance with the 
requirements of 780 CMR 1 10 and 780 CMR 903.1 
the building of official shall transmit one set of the 
fire protection construction documents (780 CMR 
903 . 1 . 1 ) and building construction documents to the 
head of the fire department or his designee for 
review and approval of the items specified in 
780 CMR 903.1.1. 

Note: 

1. M.G.L. c. 148 §§ 26G, 26H and 261, when 
adopted by a city or town, will impact the fire 
protection requirements of 780 CMR 9. A 
building official shall consult Official 
Interpretation Number 45-96, listed in 
Appendix B, for guidance, where communities 
have adopted M.G.L. c. 148, §§ 26G, 26H, and/or 
261. 

2. In addition to the building permit requirements 
for fire protection systems m 780 CMR, M.G.L. 
c. 148 § lOA and 527 CMR may impose 
additional installation permitting requirements. 

903.2.1 Alternative Fire Protection Design 
Methodologies - Independent Engineering 
Review: Where alternative design methodologies 
are utilized and where such methodologies result 
in designs which vary fi'om any prescriptive 
requirement of 780 CMR, the owner shall engage 
an independent registered professional engineer to 
review said alternative design methodologies. 
The scope of the independent registered 
professional engineer review shall include, but not 
be limited to the following; 

(a) Review of the design assumptions, 
methodologies and resulting proposed system 
designs, to determine whether the proposed fire 
protection system designs and any other 
systems which are affected by the design 
assumptions, are consistent with the general 
objectives and prescriptive provisions of this 
code and to determine whether or not the 
methodologies and assumptions conform to 
accepted engineering practice; 

(b) Preparation of a written report to the 
building official as to the appropriateness of 
the proposed design, specifically listing any 
variances fi-om the prescriptive provisions of 
780 CMR and describing, in detail, the design 
provisions used to achieve compliance. 

If the reviewing engineer concurs with the 
proposed design, the owner shall make 
application for a variance, to the State Building 
Code Appeals Board as provided in 780 CMR 
122. In addition to all supporting information and 
materials, the reviewing engineer's report 
required in 780 CMR 903.2.1(b) shall be included 
in the application for variance. 

A building permit shall not be issued until the 
variance, if required, has been granted, or unless 
the building permit is issued in part, as provided 
for in 780 CMR 11 1.13. 



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903.3 Fire Protection Systems Installation: Fire 
protection systems shall be installed by contractors 
and personnel appropriately licensed in the 
Commonwealth of Massachusetts {licensed 
installing contractor). Shop drawings required for 
submittals and reviews by the Registered 
Professional Engineer, or other legally recognized 
professional (M.G.L. c. 112,§ 81R), by 780 CMR 
903.1 .3 or by applicable NFPA Standards shall note 
the name(s), license number(s) and license 
expiration date(s) of the contractor(s) installing the 
fire protection systems. 

903.4 Acceptance: In accordance with the 
provisions of 780 CMR 120, a Certificate of 
Occupancy shall not issue until the building official 
and the head of the fire department or their 
designees have witnessed a satisfactory functional 
test of all fire protection systems, installed in 
accordance with the approved fire protection 
construction documents. All fire protection systems 
shall be tested in accordance with the applicable 
provisions of 780 CMR and NFPA Standards and 
approved testing criteria and operational sequence as 
submitted in 780 CMR 903. 1 . 1 , items 1 .b and c. In 
addition, the following documents and/or 
information shall be simultaneously submitted to the 
building official and head of the fire department or 
their designees prior to the witnessing of the 
operational fire protection system(s) testing: 

1. Certification, fi-om the Registered 
Professional Engineer or other legally recognized 
professional (M.G.L. c. 112, § 81R) responsible 
for the design in accordance with 780 CMR 
903.1.3 stating that the fire protection systems 
have been installed in accordance with the 
approved/?re protection construction documents 
and that he has reviewed the shop drawings for 
conformance to 780 CMR 903.3 and has 
identified deviations if any, from the approved 
fire protection construction documents. 

2. Confirmation by the building owner/developer 
or authorized representative that they have 
received the as-built fire protection system shop 
drawings from the installing contractor and that 
the Registered Professional Engineer or other 
legally recognized professional (M.G.L. c. 112, 
§ 81R) has certified their reasonable accuracy. 

3. Material, Test, Performance and Completion 
Certificates, properly executed by the installing 
contractor in accordance with the applicable 
NFPA Standards. 

Exception: In lieu of witnessing a satisfactory 
functional test, the building official and head of 
the fire department or their designees may accept 
a final performance acceptance test report from a 
Registered Professional Engineer or other legally 
recognized professional (M.G.L. c. 112, § 81R). 
Said report shall certify that a complete 
satisfactory fimctional test of all fire protection 
systems in accordance with the approved testing 



criteria and operational sequence have been 
witnessed. 

903.4.1 Conditional Acceptance: The 

requirements of 780 CMR 903.4 shall not 
preclude the issuance of a temporary Certificate 
of occupancy by the Building Official in 
accordance with 780 CMR 120.3. 

780 CMR 904.0 FIRE SUPPRESSION 
SYSHTEMS 

904.1 Where required: Automatic fire suppression 
systems shall be installed where required by 
780 CMR, and in the locations indicated in 
780 CMR 904.2 through 904.9. 

Exceptions: 

1 . An automatic fire suppression system shall not 
be required in portions of buildings that comply 
with 780 CMR 406.0 for open parking structures 
less than 70 feet in height above mean grade. 

2. In telecommunications equipment buildings, 
an automatic fire suppression system shall not be 
required in those spaces or areas occupied 
exclusively for telecommunications equipment, 
associated electrical power distribution 
equipment, batteries and standby engines, 
provided that those spaces or areas are equipped 
throughout with an automatic fire detection 
system in accordance with 780 CMR 918.0 and 
are separated fi-om the remainder of the building 
with fure separation assemblies consisting of one- 
hour fireresistance rated walls and two-hour 
fireresistance rated floor/ceiling assemblies. 

Note: Also Refer to M.G.L. c. 148, § 26A and 
26G 

904.1.1 Additional requirements: When a 
building or structure is provided with a fire alarm 
system, all extinguishing systems installed in 
accordance with the provisions of 780 CMR 904 
through 914, shall be connected to the fire alarm 
system in accordance with the requirements of 
NFPA 72 as listed \n Appendix A. 

904.1.1.1 Fire pump requirements: Refer to 

780 CMR 924. 

904.2 Use Groups A-1, A-3, A-4, B, E, M, S-1, 
F-1 in buildings of 12,000 sf or greater in 
aggregate floor area: An automatic fire suppression 
system shall be provided throughout all portions or 
uses of all buildings of 12,000 sf or greater in 
aggregate area when any of the following uses are 
located within the building; 

A-1, A-3, A-4, B, E, M, S-1, F-1 
780 CMR 904.2 shall apply whether or not the use is 
separated from any other use within the building by 
fire separation assemblies. 

Exceptions: 

1. Existing buildings: Existing buildings which 

qualify as such in accordance with 780 CMR 



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3400.3.1 and which undergo a partial change in 
use to a use or uses specified in 780 CMR 904.2 
or are mixed use buildings which undergo renova- 
tion of a use or uses specified in 780 CMR 904.2, 
shall be provided with automatic fire suppression 
systems in accordance with the following: 

(a) only in those portions of the building which 
have been changed in use and only when such 
space or spaces exceed 12,000 sf in aggregate 
floor area. 

(b) only in those portions of the building 
which have been altered or renovated provided 
that such renovation constitutes substantial 
alterations or substantial renovations, in 
accordance with 780 CMR 340 1 and only when 
such space or spaces exceed 12,000 sf in 
aggregate floor area. 

2. Public Garages: Public Garages shall conform 
to 780 CMR 408.0. 

Note: See also M.G.L. c. 148, §§ 26A and 26G. 

904.3 Use Group A-2 in buildings of 5,000 sf or 
greater in aggregate floor area: An automatic fire 
suppression system shall be provided throughout all 
portions or uses of all buildings of 5,000 sf or greater 
in aggregate area when any A-2 use is located within 
the building; 

780 CMR 904.3 shall apply whether or not the 
A-2 use is separated from any other use within the 
building by fire separation assemblies. 

Exception: 

1. Existing buildings: Existing buildings which 
qualify as such in accordance with 780 CMR 
3400.3. 1 which undergo a partial change in use to 
an A-2 use or partial renovation of an existing A-2 
use shall be provided with an automatic fire 
suppression system only in those portions of the 
building which have been changed to an A-2 use 
or those existing A-2 uses which have been 
renovated when such renovation constitutes 
substantial alterations or substantial renovations, 
in accordance with 780 CMR 340 1 and only when 
the proposed or existing A-2 use exceeds 5,000 sf 
in aggregate floor area. 

904.4 Use Group H: An automatic fire suppression 
system shall be provided throughout all buildings of 
Use Group H. 

Exception: Magazines used for the storage of Use 
Group H-1 materials which are constructed and 
located in accordance with NFPA 495 and 
527 CMR listed m Appendix A. 
Note: See also M.G.L. c. 148, §§ 26A and 26G. 

904.5 Use Group I: An automatic fire suppression 
system shall be provided throughout all buildings of 
Use Group I. 

Note: See also M.G.L. c. 148, §§ 26A and 26G. 

904.6 Use Group R-1: An automatic fire 
suppression system shall be provided throughout all 
buildings or spaces of Use Group R- 1 in accordance 



with 780 CMR 906.2.1 or 906.2.2. 

904.7 Use Group R-2: An automatic fire 
suppression system shall be provided throughout all 
buildings with an occupancy in Use Group R-2 in 
accordance with 780 CMR 906.2.1 or 906.2.2. 

Exception: Buildings having no more than three 
dwelling units shall be permitted to have an 
automatic fire suppression system installed in 
accordance with NFPA- 1 3D, "SPRINKLER 
SYSTEMS", listed in Appendix A, subject to the 
following conditions: 

a. Every automatic sprinkler system shall have 
at least one automatic water supply or a stored 
water supply source in accordance with NFPA- 
13D where the minimum quantity of stored 
water shall equal the water demand rate times 
20 minutes. 

b. 780 CMR 919.3.2. Exception 2, and 780 
CMR 919.5, Exception, shall not apply when 
the automatic fire suppression system installed 
is installed in accordance with NFPA- 1 3D. 

This Exception shall apply to new construction or 
substantial renovation, or substantial alteration as 
defined in 780 CMR, Chapter 34 
Note: See also M.G.L. c. 148, §§ 26A and 261. 

904.8 Windowless story: An automatic fire sup- 
pression system shall be provided throughout every 
story or basement of all buildings where there is not 
provided at least one of the following types of 
openings: 

1. An exterior stairway that conforms to the 
requirements of 780 CMR 1014.0, or an outside 
ramp that conforms to the requirements of 
780 CMR 1016.0, leading directly to grade in each 
50 linear feet (15240 mm) or fraction thereof of 
exterior wall in the story or basement, on at least 
one side of the building. 

2. Openings entirely above the adjoining ground 
level totaling 20 square feet (1.9 m^) in each 50 
linear feet (15240 mm) or fraction thereof of 
exterior wall in the story or basement, on at least 
one side of the building. Openings shall have a 
least dimension of not less than 22 inches (559 
mm), and shall have a minimum net clear opening 
of five square feet (0.5m ). Access to such 
openings from the exterior shall be provided to the 
fire department and such openings shall be 
unobstructed to allow fire-fighting and rescue 
operations from the exterior. 

When openings in a story are provided on only 
one side and the opposite wall of such story is more 
than 75 feet (22860 mm) from such openings, the 
story shall be equipped throughout with an 
automatic sprinkler system, or ojjenings as specified 
herein shall be provided on at least two sides of the 
exterior walls of the story. If any portion of a 
basement is located more than 75 feet (22860 mm) 
from the openings required in 780 CMR 904.0, the 
basement shall be provided with an automatic 
sprinkler system. 

Exception: Occupancies in Use Group R-3. 



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904.9 Other required suppression systems: In 
addition to tlie requirements of 780 CMR 904.2 
through 904.8, automatic fire suppression systems 
for certain buildings and areas siiall be provided in 
accordance with Table 904.9. 

Table 904.9 
ADDITIONAL REQUIRED SUPPRESSION 

SYSTEMS*'* 



780 CMR Section 


Subject 


302.1.1 


Specific occupancy areas 


402.10; 402.15.2 


Covered mall buildings 


403.2 


High-rise buildings 


404.2 


Atriums 


408.3.1 


Public garages 


408.4 


Fuel-dispensing areas 


426.0 


Bulk Merchandizing/Warehouse 




Occupancies 


780 CMR Section 


Subject 



411.7 Sound stages 

412.6 Stages and enclosed platforms 

413.4 Special amusement buildings 

416.4 HPM facilities 

4 19.3 Paint spray booths and storage 

rooms 

Open parking structures more than 
70 feet in height above the mean 
grade (M.G.L. c. 148, § 26A) 



507.1 


Unlimited area buildings 


1020.3 


Exit lobbies 


2806.4 


Drying rooms 


2807.6 


Waste and linen chutes and 




termination and incinerator 




rooms 


2808.4 


Refuse vaults 


Note (1) See also M.G.L. c. 148, §§ 26A, 260, 26H, and 


261. 





780 CMR 905.0 SUPPRESSION SYSTTEM 
AGENT COMPATIBILITY 
905.1 Agent compatibility: The extinguishing agent 
for each suppression system shall be compatible with 
the type of hazard and fire. Each fixed fire 
suppression system shall be of an approved type and 
shall be designed and installed in accordance with 
the requirements of 780 CMR. 

905.1.1 Special hazards: In rooms or buildings 
containing combustibles (such as aluminum 
powder, calcium carbide, calcium phosphide, 
metallic sodium and potassium, quick-lime, 
magnesium powder or sodium peroxide) that are 
incompatible with water as an extinguishing 
agent, other extinguishing agents shall be utilized. 

780 CMR 906.0 FIRE SPRINKLER SYSTEM 

906.1 General. Automatic sprinkler systems shallbe 
approved and shall be designed and installed in 
accordance with the provisions of 780 CMR. 

906.2 Equipped throughout: Where the provisions 
of 780 CMR require that a building or portion 
thereof be equipped throughout with an automatic 



sprinkler system, the system shall be designed and 
installed in accordance with 780 CMR 906.2.1, 
906.2.2 or 906.2.3. 

Exception: Where water as an extinguishing 
agent is not compatible with the fire hazard (see 
780 CMR 905. 1) or is prohibited by a law, statute 
or ordinance, the affected area shall be equipped 
with an approved automatic fire suppression 
system utilizing a suppression agent that is 
compatible with the fire hazard. 

906.2.1 NFiPA 13 systems: The system shall be 
designed and installed in accordance with NFiPA 
13 listed in Appendix A. 

906.2.2 NFiPA 13R systems: In buildings four 
stories or less in height, systems designed and 
installed in accordance with NFiPA 13R listed in 
Appendix A shall be permitted in Use Group I-l 
buildings with not more than 16 occupants and in 
Use Group R buildings. 

906.2.3 NFiPA 13D systems: In Use Group R-3 
buildings with at least two-hour fireresistance 
rated fire separation assemblies between dwelling 
units, or in Use Group I-l buildings with not more 
than eight occupants, systems designed and 
installed in accordance with NfiPA 13D listed in 
Appendix A shall be permitted. 

906.3 Design: Design documentation shall be in 
accordance with 780 CMR 903. 

906.4 Actuation: Water sprinkler systems shall be 
automatically actuated unless otherwise specifically 
provided for in 780 CMR. 

906.5 Sprinkler alarms: Approved audible and 
visual alarm devices shall be connected to every 
water sprinkler system. Such alarm devices shall be 
activated by water flow and shall be located in an 
approved location on the exterior of the building and 
throughout the building in accordance with the 
requirements of NFPA-72 listed in Appendix A. 

906.6 Water-control valve identification: All 

valves controlling water to fire protection systems 
shall be provided with permanently attached 
identification tags indicating the valves' function and 
what is controlled. 

906.7 Sprinkler riser: A sprinkler system riser 
which also serves as the wet standpipe riser in 
buildings required to have or having both systems, 
shall conform to 780 CMR 914.6. 

906.8 Signs: Where sprinkler control valves are 
located in a separate room or building, a sign shall 
be provided on the entrance door. The lettering shall 
be at least 2Vi inches (63.5 mm) in height and shall 
otherwise conform to 780 CMR 901 .6 and shall read 
"Sprinkler Control Valves." 

906.9 Acceptance tests: All sprinkler systems shall 
be tested in accordance with the applicable NFPA 



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Standards used for sprinkler system design and 
Installation and listed \n Appendix A. 

906.9.1 Underground connections: Underground 
mains and lead-in connections shall be flushed 
and tested in accordance with NFiPA 13 and 24 
listed In Appendix A. 

906.9.2 Hydrostatic test: All sprinkler systems shall 
be tested hydrostatically in accordance with the 
applicable NFPA Standards listed m Appendix A. 

780 CMR 907.0 UMTTED AREA SPRT'OOJai 
SYSTEMS 

907.1 General: A limited area sprinkler system shall 
be of an approved type and shall be installed in 
accordance with the provisions of 780 CMR 907.0. 
Complete Jire protection construction documents 
shall be provided. (See 780 CMR 903.0.) 

907.2 Where permitted: Where the provisions of 
780 CMR require the installation of a /ire 
suppression system, and a water sprinkler 
extinguishing system is used with a limited number 
of sprinklers, a limited area sprinkler system that 
complies with the requirements of 780 CMR 907.0 
is permitted to be installed. 

907 J.l Special occupancy areas: A limited area 
sprinkler system shall be permitted within special 
occupancy areas as designated in 780 CMR 4 or 
within specific occupeincy areas as designated in 
780 CMR 302.1.1, provided that the area is 
enclosed within fire separation assemblies as 
required by 780 CMR, and 20 sprinklers or less 
are required to protect each separately enclosed 
area. Where nonfireresistance rated separation 
walls are permitted by Table 302.1.1 to enclose 
contiguous specific occupancy areas on one floor, 
the areas shall be considered to be one separately 
enclosed area for the purposes of determining the 
number of sprinklers based on the spacing 
limitations of NFPA 13 listed m Appendix A. 

907.2.2 Unenclosed floor openings, waste and 
linen chutes, and kitchen and hazardous 
exhaust systems: A limited area sprinkler system 
shall be permitted to protect unenclosed escalator 
floor openings that comply with 780 CMR 
907.2.2.1, chutes used for waste or linen collec- 
tion, commercial kitchen exhaust systems and 
duct systems that exhaust hazardous materials. 
907.2.2.1 Water curtain: The £irea of the floor 
opening shall not exceed twice the horizontal 
projected area of the escalator and the opening 
shall not connect more than four stories in 
occupancies in other than Use Groups B and M 
and the opening shall be protected by a draft 
curtain and a closed sprinkler water system 
conforming to NfiPA 13 listed m Appendix A. 
Note: Relative to escalator floor openings, 
also see 780 CMR 71 3.3. 



907.3 Design: Except as otherwise provided for in 
780 CMR 907.0, a limited area sprinkler system 
shall be designed and installed in accordance with 
780 CMR 906.0. 

907.4 Actuation: A limited area sprinkler system 
shall be automatically actuated. 

907.5 Sprinkler alarms: Alarms and alarm 
attachments shall be required and shall be located 
and installed in accordance with the requirements of 
780 CMR 906.5. 

907.6 Standpipe connection: The water supply for 
the limited area sprinkler system shall be from the 
building standpipe system where the building is 
equipped with a standpipe system that is sized for a 
500-gallon-per-minute (0.032 m Is) minimum flow 
and has an automatic water supply (see 780 CMR 
914.5). 

907.6.1 Domestic supply: Where limited area 
sprinkler systems are supplied from the domestic 
water system, the domestic water system shall be 
designed to support adequately the design flow of 
the largest number of sprinklers required to be 
hydraulically calculated by NFiPA 13 listed in 
Appendix A in any one of the enclosed areas plus 
the domestic demand. 

907.6.2 Cross connection: The potable water 
supply shall be protected against backflow in 
accordance with the requirements of the Plumbing 
and Gas Code (248 CMR), and the Department of 
Environmental Protection Regulations, 310 CMR 
as listed in Appendix A as well as any cross- 
connection protection criteria legally set forth by 
the water supplier/purveyor having local 
jurisdiction. 

907.6.3 Domestic connection: Shutoff valves 
shall not be permitted in the suppression system 
piping. Water supply shall be controlled by the 
riser control valve to the domestic water piping. 

Exception: Shutoff valves in the sprinkler 
system piping are permitted provided that such 
valves are supervised in accordance with 
780 CMR 923.0. 

907.7 Acceptance tests: All limited area sprinkler 
systems shall be tested as stipulated in 780 CMR 
906.9. 

780 CMR 908.0 WATER-SPRAY FIXED 
SYSTTEMS 
908.1 General: Water-spray fixed systems for fire 
suppression shall be of an approved type and shall 
be installed in accordance with the provisions of 
780 CMR and NFiPA 15 listed m Appendix A. A 
water-spray fixed system is a system connected to a 
reliable source of water supply and equipped with 
normally open water-spray nozzles for specific 



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discharge and distribution over the surface or area to 
be protected. 

908.2 Design: CompXttt fire protection construction 
documents and hydraulic calculations shall be 
submitted for review prior to installation. The 
submittal shall include nozzle layouts, friction loss, 
calculations, water supply data and a detailed layout 
of the entire area to be protected. (See 780 CMR 
903.0.) 

908.3 Actuation: Water-spray systems shall be 
automatically actuated and shall be provided with a 
manual means of actuation. 

908.4 Acceptance tests: All new system piping shall 
be flushed and tested in accordance with the 
provisions of NFLPA 15 listed in Appendix A. 

780 CMR 909.0 CARBON DIOXTOE 
EXTINGUISHING SYSTEMS 

909.1 General: Carbon dioxide extinguishing 
systems shall be of an approved type and shall be 
installed in accordance with the provisions of 
780 CMR and NFiPA 12 listed in Appendix A. A 
carbon dioxide extinguishing system is a system 
which supplies CO2 from a pressurized vessel 
through fixed pipes and nozzles. 

909.2 Design: The details of the system indicated on 
the fire protection construction documents shall 
include information and calculations of the amount 
of carbon dioxide; the location and flow rate of each 
nozzle including equivalent orifice area; and the 
location and size of the carbon dioxide storage 
facility. Information shall be submitted pertaining to 
the location and flmction of detecting devices, 
operating devices, auxiliary equipment and electrical 
circuitry, if used. Sufficient information shall be 
indicated to identify properly the apparatus and 
devices used. Any special features shall be 
adequately explained. (See 780 CMR 903.0.) 

909.3 Actuation: Carbon dioxide extinguishing 
systems shall be automatically actuated and shall be 
provided with a manual means of actuation. 

909.4 Safety requirements: Where persons will 
enter or be trapped in atmospheres made hazardous 
by carbon dioxide discharge, warning signs and 
discharge alarms shall be provided. 

909.5 Acceptance tests: All carbon dioxide 
extinguishing systems shall be tested in accordance 
with NFiPA 12 listed in Appendix A. A completed 
system shall be tested for tightness up to the selector 
valve, and for continuity of piping with free 
unobstructed flow beyond the selector valve. The 
labeling of devices with proper designations and 
instructions shall be checked. Operational tests shall 
be conducted on all devices except cylinder valves 



in multicylinder high-pressure systems. Where 
conditions prevail that make it difficult to determine 
adequately the system requirements or design, a 
suitable discharge test and concentration analysis 
shall be made. 

780 CMR 910.0 DRY-CHEMICAL 
EXTINGUISHING SYSTEMS 

910.1 General: Dry-chemical extinguishing systems 
shall be of an approved type and shall be installed in 
accordance with the provisions of 780 CMR and 
NFiPA 17 listed in Appendix A. A dry-chemical 
extinguishing system is a system consisting of dry 
chemical and expellant gas storage tanks, fixed 
piping and nozzles used to assure proper distribution 
of an approved extinguishing agent to a specific fire 
hazard or into an area of potential fire. 

910.2 Design: The details of the system indicated on 
the fire protection construction documents shall 
include suflBcient information and calculations of the 
amount of dry chemical; the size, length and 
arrangement of connected piping, or piping and 
hose; and a description and location of nozzles so 
that the adequacy of the system can be determined. 
Information shall be submitted pertaining to the 
location and function oi detecting devices, operating 
devices, auxiliary equipment and electrical circuitry, 
if used. Sufficient information shall be indicated to 
identify properly the apparatus and devices used. 
Any special features shall be adequately explained. 
(See 780 CMR 903.0.) 

910.3 Actuation: Dry-chemical extinguishing 
systems shall be automatically actuated and shall be 
provided with a manual means of actuation. 

910.4 Safety requirements: Where persons will be 
exposed to a dry-chemical discharge, warning signs 
and discharge alarms shall be provided. 

910.5 Acceptance tests: All dry-chemical 
extinguishing systems shall be tested in accordance 
with NFiPA 17 listed in Appendix A. A completed 
system shall be tested by a discharge of expellant 
gas through the piping and nozzles. Observations for 
gas leakage and for continuity of piping with free 
unobstructed flow shall be made. Observations shall 
be made of the flow of expellant gas through all 
nozzles. The labeling of devices with proper 
designafions and instructions shall be checked. After 
testing, all piping and nozzles shall be blown clean 
using compressed air or nitrogen, and the system 
shall be properly charged and placed in the normal 
"set" condition. 

910.5.1 Discharge test: All systems shall be 
tested by a discharge of expellant gas through the 
piping and nozzles with observations being made 
of the flow of expellant gas through all nozzles as 



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well as observing for leakage and continuity of 
piping with free unobstructed flow. 

910.6 Range hoods: In addition to the requirements 
of 780 CMR 910.0 and the applicable NFPA 
standards listed in Appendix A, range hood dry- 
chemical systems shall bear the label of an approved 
agency. 

The system shall be installed in accordance with 
the manufacturer's installation instructions. The dry- 
chemical agent of the system shall be nontoxic. 

780 CMR 911.0 FOAM-EXnNGUISfflNG 
SYSTEMS 

911.1 General: Foam-extinguishing systems shall be 
of an approved type and shall be installed in 
accordance with the provisions of 780 CMR and 
NFiPA 11, llA and 16 listed in Appendix A. A 
foam-extinguishing system is a special system 
designed to discharge, either mechanically or 
chemically, a foam made firom concentrates, over the 
area to be protected. 

911.2 Design: The details of the system indicated on 
the Jire protection construction documents shall 
include complete computations show-testing 
pressure drop in all system piping, friction loss 
calculations of liquid lines and a detailed layout of 
the entire hazard area to be protected. Hydraulic 
characteristics of foam proportioners and foam 
makers as determined by tests shall be supplied by 
the manufacturer to the department (including the 
range of operating conditions required for the 
proposed installation) to permit determination of the 
adequacy of the hydraulics of the proposed 
protection. (See 780 CMR 903.0.) 

911.3 Actuation: A foam-extinguishing system shall 
be automatically actuated and shall be provided with 
a manual means of actuation. 

911.4 Safety requirements: In any proposed use of 
a medium- or high-expansion foam where persons 
will be exposed to the foam discharge, warning signs 
and discharge alarms shall be provided. 

9li.5 Acceptance tests: All foam-extinguishing 
systems shall be tested in accordance with NFiPA 
11,1 llAand XSWst^Ain Appendix A. The system 
shall be subjected to a flow test to insure that the 
hazard area is frilly protected in compliance with the 
design specifications, and to determine flow 
pressures, actual discharge capacity, foam quality, 
consumption rate of foam-producing materials. 



manpower requirements and other operating 
characteristics. 

780 CMR 912.0 HALOGENATED 
EXTINGUISHING SYSTEMS 

912.1 General: Halogenated extinguishing systems 
shall be of an approved type and shall be installed in 
accordance with the provisions of 780 CMR and 
NFiPA 12 A and 12B listed in Appendix A. A 
halogenated extinguishing system is a system 
consisting of pipes, open nozzles and a container of 
halogenated agent under pressure. 

912.2 Design: The details of the system indicated on 
the fire protection construction documents shall 
include information and calculations of the amount 
of extinguishing agent; the container storage 
pressure; the location and flow rate of each nozzle 
including equivalent orifice area; the location, size 
and equivalent lengths of pipe, fittings and hose; and 
the location and size of the storage facility. 
Information shall be submitted pertaining to the 
location and fiinction of detecting devices, operating 
devices, auxiliary equipment and electrical circuitry, 
if used. Sufficient information shall be indicated to 
identify properly the apparatus and devices used. 
Any special features shall be adequately explained. 
(See 780 CMR 903.0.) 

912.3 Actuation: Halogenated extinguishing 
systems shall be automatically actuated and shall 
also be provided with a manual means of actuation. 

912.4 Safety requirements: Where persons will 
enter or be trapped in atmospheres made hazardous 
by a halogenated system discharge, warning signs 
and discharge alarms shall be provided. 

912.5 Acceptance tests: All halogenated 
extinguishing systems shall be tested in accordance 
with NFiPA 12A and 12B listed in Appendix A. 
completed system shall be tested for tightness up to 
the selector valve, and for continuity of piping with 
free unobstructed flow beyond the selector valve. 
The labeling of devices with proper designations and 
instructions shall be checked. Operational tests shall 
be conducted on all devices except cylinder valves 
in multicylinder systems. Where conditions prevail 
that make it difficult to determine adequately the 
system requirements or design, a suitable discharge 
test and concentration analysis shall be made. 



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780 CMR 913.0 WET-CHEMICAL RANGE 
HOOD EXTINGUISHING SYSTEMS 

913.1 General: Wet-chemical extinguishing systems 
shall be installed in accordance with the provisions 
of 780 CMR 913.0, and the BOCA Mechanical Code 
and NFiPA 17A listed in Appendix A. The system 
shall bear the label of an approved agency and shall 
be installed in accordance with the manufacturer's 
installation instructions. A wet-chemical system is a 
solution of water and potassium-car-bonate-based 
chemical, potassium-acetate-based chemical or a 
combination thereof which forms the extinguishing 
agent. 

913.2 Design: The details of the system indicated on 
the fire protection construction documents shall 
include sufficient information and calculations on 
the amount of wet chemical; the size, length and 
arrangement of connected piping; and a description 
and location of nozzles so that the adequacy of the 
system can be determined. Information shall be 
submitted pertaining to the location and function of 
detecting devices, operating devices, auxiliary 
equipment and electrical circuitry, if used. Sufficient 
information shall be indicated to identify properly 
the apparatus and devices used. Any special features 
shall be adequately explained. (See 780 CMR 
903.0.) 

913.3 Actuation: Wet-chemical extinguishing 
systems shall be automatically actuated and shall be 
provided with a manual means of actuation. 

913.4 Safety requirements: Where persons will be 
exposed to a wet-chemical discharge, warning signs 
and discharge alarms shall be provided. 

913.5 Acceptance tests: All wet-chemical 
extinguishing systems shall be tested in accordance 
with NFiPA llAlistcdmAppendixA. Acompleted 
system shall be tested by discharge of wet chemical 
in sufficient amounts to verify that the system is 
properly installed and functional. Tests shall include 
a check of the detection systems, the alarms and the 
releasing devices, including manual stations, fuel 
and power shutoff devices and other associated 
equipment. 

913.5.1 Discharge test: All systems shall be 
tested by a discharge of expellant gas through the 
piping and nozzles with observations being made 
of the flow of expellant gas through all nozzles as 
well as observing for leakage and continuity of 
piping with free unobstructed flow. 

780 CMR 914.0 STANDPIPE SYSTEMS 
914.1 General: Standpipe systems shall be designed, 
installed and maintained in accordance with the 
provisions of 780 CMR and NFPA-14 listed in 
Appendix A. Where standpipe systems are required 
by 780 CMR, such systems shall be automatic wet 



systems. Automatic dry and semi-automatic dry 
standpipe systems shall be permitted only in areas 
subject to freezing. Complete fire protection 
construction documents shall be provided. (See 
780 CMR 903.0.) 

914.2 Where required: Class I standpipe systems 
shall be installed where required by 780 CMR 
914.2.1 through 914.2.11 and shall be located in 
accordance with the provisions of NFPA 14, listed in 
Appendix A. 

914.2.1 Use Group A: In all buildings or 
structures or portions thereof of Use Group A 
when: 

1 . Two or more stories in height of Use Group 
A-1, A-2, or A-3, and having an occupant load 
or more than 300; or; 

2. Three or more stories in height regardless 
of the area per floor; or; 

3. Having an auditorium seating over 500. 
Standpipes shall be located one on each side of 
the auditorium in each tier, one in each 
mezzanine, one in each tier of dressing rooms, 
and protecting each property, store and work 
room; or; 

4. Having a stage. Standpipes shall be located 
on each side of the stage. 

Such standpipes shall be not less that 2'/2-inch 
diameter, equipped with approved IVz inch hose 
station. 

914.2.2 Use Group B: In all buildings or 
structures or portions thereof of Use Group B 
when: 

1 . Three or more stories in height, and more 
than 3,000 square feet in area per floor; or; 

2. Four or more stories in height regardless of 
the area per floor. 

914.2.3 Use Group E: In buildings or structures 
or portions thereof of Use Group E when three or 
more stories in height regardless of the area per 
floor or when having a stage or auditorium in 
accordance with 780 CMR 914.2.1(3) and 
914.2.1(4). 

914.2.4 Use Group F: In all buildings or 
structures or portions thereof of Use Group F 
when: 

1 . Three or more stories in height, and more 
than 3,000 square feet in area per floor, or; 

2. Four or more stories in height regardless of 
the area per floor. 

914.2.5 Use Group H: In all buildings or 
structures or portions thereof of Use Group H 
when: 

1 . Three or more stories in height, and more 
than 10,000 square feet in area per floor; or; 

2. Four or more stories in height, regardless of 
the area per floor. 



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914.2.6 Use Group I: In all buildings or 
structures or portions thereof of Use Group I, 
three or more stories in height, regardless of the 
area per floor. 

914.2.7 Use group M: In all buildings or 
structures or portions thereof of Use Group M 
when: 

1 . Three stories or more in height, and more 
than 3,000 square feet in area per floor, or; 

2. Four or more stories in height regardless of 
the area per floor, or; 

3. Classified as a covered mall building 
within the mall portions (see 780 CMR 4). 

4. Classified as a bulk/merchandising 
warehouse. (See 780 CMR 4.) 

914.2.8 Use Group R-1 and R-2: hi all buildings 
or structures or portions thereof of Use Group R- 1 
and R-2 when: 

1 . Three or more stories in height and of Use 
Group R-1 regardless of the area per floor; or; 

2. Three or more stories in height and more 
than 10,000 square feet in area per floor, or; 

3. Four or more stories in height regardless of 
the area per floor. 

914.2.9 Use Group S: hi all buildings or 
structures or portions thereof of Use Group S, 
other than public garages which shall conform to 
780 CMR 914.2.10 when: 

1. Three or more stories in height, or Use 
Group S-1, and more than 3,000 square feet in 
area per floor; or; 

2. Three or more stories in height. Use Group 
S-2, and more than 10,000 square feet in area 
per floor; or; 

3. Four or more stories in height of Use 
Groups S-1 or S-2 regardless of the area per 
floor. 

914.2.10 Use Group U: hi all buildings or 
structures or portions thereof of Use Group U 
when: 

1 . Three or more stories in height and more 
than 1 0,000 square feet in area per floor; or; 

2. Four or more stories in height regardless of 
the area per floor. 

914.2.11 Public Garages: hi all Group I and 1 1 
public garages and open parking structures when: 

1. More than 10,000 square feet in area per 
floor; or; 

2. More than 7,500 square feet in area per 
floor and more than one story in height; or; 

3. More than 5,000 square feet in area per 
floor, and more than two stories in height; or; 

4. More than three stories ui height; or; 

5. Located in buildings where the upper 
stories are designed for other uses: or; 

6. When located in any story that is more than 
50% below grade. 



Exception: Standpipe systems can be 
"Class I Manual Dry Type" as defined by 
NFPA-14 for open parking structures less 
than 70' in height. 

914.3 Standpipe system piping sizes: The riser 
piping, supply piping, and the water service piping 
shall be hydraulically sized in accordance with the 
provisions of NFPA-14 listed in Appendix A. 

Exception: The residual pressure(s) as noted in 
NFPA-14 are not required to be maintained in 
buildings less than 70 feet in height which are 
equipped throughout with an approved automatic 
fire suppression system. However the system 
shall be designed to accommodate the outlet 
pressures and water flows in accordance with 
NFPA 14 and inlet pressures consistent with local 
fire department equipment.. 

914.4 High-rise buildings: All buildings more than 
70 feet in height above the mean grade shall have 
each floor supplied by a minimum of two 
combination standpipe/sprinkler risers installed in 
accordance with the requirements of NFPA-14, 
listed in Appendix A. 

914.5 Outlets: Standpipe system outlets shall 
comply with the provisions for. Class HI Systems of 
NFPA-14 as Usted in Appendix A. 

914.6 Acceptance Tests: All Standpipe systems 
shall be tested in accordance with NFPA listed in 
Appendix A. 

914.6.1 Underground Connections: 

Underground mains and lead-in connections shall 
be flushed and tested in accordance with NFPA 
14 and NFPA 24 listed in Appendix A. 

914.7 Standpipe system requirements for 
buildings under construction or demolition: 

914.7.1 General: Standpipes required by 780 
CMR 914.7 are to be either temporary or perma- 
nent in nature, with or without a water supply, 
provided, however, that such standpipes conform 
to the requirements of 780 CMR 914.0 as to 
number of risers, capacity, outlets and materials. 

914.7.2 Buildings under construction or 
demolition: Standpipe requirements for buildings 
under construction or demolition shall be in 
accordance with the provisions of 780 CMR 
3305.3 and NFPA 241 as listed in Appendix A. 

780 CMR 915.0 FIRE DEPARTMENT 
CONNECTIONS 

915.1 Required: All required water fire- 
extinguishing and standpipe systems shall be 
provided with a fire department connection in 
accordance with the applicable NFPA standards. 
Standpipes in buildings under construction or 



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FIRE PROTECTION SYSTEMS 



demolition shall conform to 780 CMR 3305.3 and 
NFPA 241 listed in Appendix A. 

Exceptions. 

1 . Limited area sprinkler systems supplied from 
the domestic water system. 

2. Where the local fire department approves a 
single connection for large diameter hose of at 
least four inches. 

3. An automatic sprinkler system with less than 
20 sprinklers. 

915.2 Connections: Fire department connections 
shall be arranged in such a manner that the 
attachment to any one water sprinkler connection 
will serve all sprinklers, and the attachment to any 
one standpipe connection will serve all standpipes 
within the building. 

915.3 Location: Fire department connections shall 
be located and shall be visible on a street front or in 
a location approved by the fire department. Such 
connections shall be located so that immediate 
access is provided to the fire department. Fire 
department connections shall not be obstructed by 
fences, brushes, trees, walls or any other similar 
object. 

915.4 Height: Fire department connections shall not 
be less than 18 inches (457 mm) and not more than 
42 inches (1067 mm) in elevation, measured from 
the ground level to the centerline of the inlets. 

915.5 Projection: Where the fire department 
connection will otherwise project beyond the 
property line or into the public way, a flush-type fire 
department connection shall be provided. 

915.6 Hose thread: Hose thread in the fire 
department connection shall be uniform with that 
used by the local fire department. 

915.7 Fittings: Fire department inlet connections 
shall be fitted with check valves, ball drip valves and 
plugs with chains or frangible caps. 

915.8 Signs: A metal sign with raised letters at least 
one inch (25 mm) in height shall be mounted on all 
fire department connections serving sprinklers or 
standpipes. Such signs shall read "Automatic 
Sprinklers" or "Standpipe," or both, as applicable. 

780 CMR 916,0 YARD HYDRANTS/ 
UNDERGROUND FIRE MAINS 
916.1 Fire hydrants: Fire hydrants and underground 
fire mains installed on private property shall be 
located and installed as directed by the fire 
department. Hydrants shall conform to the standards 
of the administrative authority of the jurisdiction and 
the fire department. Hydrants shall not be installed 
on a water main less than six inches in diameter. 



Standards of construction shall be in accordance 
with NFPA 24 as listed in Appendix A 

780 CMR 917.0 FIRE PROTECTIVE 
SIGNALING SYSTEMS 

( Fire Alarm System ) 

917.1 General: Fire protective signaling systems 
shall be of an approved type and shall be installed in 
accordance with the provisions of 780 CMR and 
NFPA 72 listed \n Appendix A. 

917.2 Fire Protection Construction documents: 

Where a fire protective signaling system is required 
by 780 CMR, the fire protection construction 
documents shall show the location and number of all 
alarm-initiating devices and alarm notification 
appliances, and shall provide a description of all 
equipment to be used, proposed zoning, a list of 
auxiliary control fianctions (i.e., elevator capture), 
location of the control panel(s) and annunciator(s), 
and a complete sequence of operation for the system. 
(Also see 780 CMR 903.0) 

917.3 Approval: All devices, combinations of 
devices, appliances and equipment shall be approved 
for the fire protective signaling purpose for which 
such equipment is used. 

917.4 Where required: A fire protective signaling 
system shall be installed and maintained in fiiU 
operating condition in the locations described in 
780 CMR 917.4. 1 through 917.4.6. 

917.4.1 Use Group A or E: A fire protective 
signaling system shall be installed and maintained 
in all occupancies in Use Group A or E. 

917.4.2 Use Group B: A fire protective signaling 
system shall be installed and maintained in all 
occupancies in Use Group B where such buildings 
have occupied floors which are two or more 
stories above the lowest level of exit discharge or 
which have floors two or more stories below the 
highest level of exit discharge. 

917.4.3 Use Group H: A fire protective signaling 
system shall be installed and maintained in all 
occupancies in Use Groups H. 

917.4.4 Use Group I: A fire protective signaling 
system shall be installed and maintained in all 
occupancies in Use Group I. 

917.4.5 Use Group R-1: A fire protective 
signaling system shall be installed and maintained 
in all occupancies in Use Group R-1. 

917.4.6 Use Group R-2: A fire protective 
signaling system shall be installed and maintained 
in all occupancies in Use Group R-2 containing 
1 3 or more dwelling units or where any dwelling 
unit is located more than three stories above the 
lowest level of exit discharge or more than one 



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story below the highest level of exit discharge of 
exits serving the dwelling unit. 

917.5 Location: Manual fire alarm boxes shall be 
located not more than five feet (1524 mm) from the 
entrance to each exit. Manual fire alarm boxes shall 
be located in each story including basements. In 
buildings of use group A where a stage is provided, 
a manual fire alarm box shall be located next to the 
lighting control panel. For fire alarm systems 
employing automatic fire detection or water flow 
devices, at least one manual fire alarm box shall be 
provided to initiate a fire alarm signal. This manual 
fire alarm box shall be located where required by the 
Head of the Fire department or his or her designee. 

Exception: 

1. In buildings of use group A, assembly occu- 
pancy, and where approved by the local fire de- 
partment, manual fire alarm boxes may be omitted 
at exits and any other required locations, but shall 
be provided at constantly attended locations such 
as ticket booths, refreshment facilities, bars, etc. 
Where the building official determines that it is 
impractical to have a constantly attended location 
in an assembly occupancy other than a theater, 
manual fire alarm boxes shall be provided at each 
required building exit. 

2. Except as provided in 917.5, manual fire alarm 
boxes are not required in an occupancy in Use 
Group B where the height of the building is 70 
feet or less above the lowest level of fire 
department vehicle access and the building is 
equipped throughout with an automatic sprinkler 
system, and/or an automatic fire detection system 
or combination thereof, in accordance with 
780 CMR 906.0 and 780 CMR 918.0. 

917.5.1 Manual fire alarm boxes: The height of 
the manual fire alarm boxes shall be a minimum 
of 42 inches (1067 mm) and a maximum of 54 
inches (B72 mm) measured vertically, from the 
floor level to the activating handle or lever of the 
box. Manual fure alarm boxes shall be red in 
color. In all occupancies in Use Group 1-3, the 
manual fire alarm boxes shall be permitted to be 
locked in areas where staff is present whenever 
such areas are occupied and keys are readily 
available to unlock the boxes, or the boxes shall 
be located in a manned staff location which has 
direct supervision of the sleeping area. 

Exception: Where 521 CMR, Architectural 
Access Board regulations apply, manual fire 
alarm box height shall be as prescribed in 
521 CMR. 

917.6 Power supply: The primary and secondary 
power supply for the fire protective signaling system 
shall be provided in accordance with NFPA 72 listed 
in Appendix A . 

917.7 Wiring: All wiring shall conform to the 
requirements of NFPA 72 and 527 CMR 12.00: 



Massachusetts Electrical Code listed in Appendix A. 
Wireless systems utilizing radio frequency 
transmitting devices shall comply with the special 
requirements for supervision of low-power wireless 
systems in NFPA 72 listed in Appendix A. 

917.7.1 Activation: The alarm notification 
appliances shall be automatically activated by all 
of the following where provided: 

1. Smoke detectors, other than single- and 
multiple-station smoke detectors, as required 
by 780 CMR 919.0; 

2. Sprinkler water-flow devices; 

3. Manual fire alarm boxes; and 

4 Other approved types of automatic fire 
detection devices, extinguishing, or 
suppression systems. 
Exceptions: 

1 . Smoke detectors in an occupancy in Use 
Group 1-3 are permitted to actuate an audible 
alarm-indicating appliance at a constantly 
attended location and are not required to 
activate a general alarm. 

2. Audible alarms in buildings of Use 
Group A with an occupant load greater than 
300 persons shall sound only in a constantly 
attended receiving station within the 
building for purposes of initiating emergen- 
cy action. Occupant notification shall be by 
means of either voice or prerecorded mes- 
sage announcement initiated by the person in 
the constantly attended receiving station and 
in accordance with 780 CMR 917.9. In 
buildings of Use Group A utilizing reduced 
lighting levels on a regular basis, lights 
providing normal lighting levels shall be 
activated simultaneously with the beginning 
of the voice or prerecorded message an- 
nouncement. Where the building official 
determines that it is impractical to have a 
constantly attended location in an assembly 
occupancy the fire alarm system shall be 
arranged to automatically provide 
prerecorded evacuation instructions. 

3. For mixed use group occupancies that 
contain an A use group the use group A area 
shall be in accordance with 780 CMR 
917.7.1 exception 2. 

917.7.1.1 Length of evacuation signal: 
Automatic deactivation of audible and visible 
alarms shall not be allowed. 

Exception: Automatic deactivation of 
audible alarms after a period of operation of 
15 minutes shall be permitted when ap- 
proved by the local fire department. Auto- 
matic deactivation of audible alarms shall 
only be permitted when the fire alarm system 
is supervised in accordance with 780 CMR 
923.2 or by an approved auxiliary fire alarm 
system in accordance with NFPA 72. 

917.7.2 Presignal or positive alarm sequence 
system: Presignal or positive alarm sequence 



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systems shall not be installed unless approved by 
the code official and by the local fire department. 
Where a presignal or positive alarm sequence 
system is installed, 24-hour supervision by 
trained personnel shall be provided at a location 
approved by the local fire department, in order 
that the alarm signal can be actuated in the event 
of fire or other emergency. 

917.7.3 Zones: Each floor shall be zoned 
separately and a zone shall not exceed 20,000 
square feet (1860 m^). The length of any zone 
shall not exceed 300 feet (91440 mm) in any 
direction. A zoning indicator panel and the 
associated controls shall be provided in a location 
approved by the local fire department. Where 
individually addressable alarm initiating devices 
are used, a single circuit ( or pathway ) shall not 
exceed the above size limitations unless the circuit 
is a Class A circuit, and the style and device 
loading meets the requirements for proprietary 
systems as listed in NFPA 72. Where individually 
addressable alarm initiating devices are logically 
combined into groups for annunciation purposes, 
the above zone size limitations shall apply to the 
group. The local fire department shall approve all 
zone and point descriptions. The visual zone 
indication shall lock in until the system is reset 
and shall not be canceled by the operation of an 
audible alarm - silencing switch. In buildings that 
have floors located more than 70 feet above mean 
grade, a separate zone by floor shall be provided 
for the following types of alarm-initiating devices 
where provided: 

1. Smoke detectors; 

2. Sprinkler water-flow devices; 

3. Manual fire alarm boxes; and 

4. Other approved types of automatic fire 
detection devices, extinguishing, or 
suppression systems. 

Exceptions: 

1 . Automatic sprinkler system zones shall not 
exceed the area permitted by NFPA 13 listed in 
Appendix A. 

2. Duct type smoke detectors shall be 
separately identified with a remote test/ 
indicator station. The location of the remote 
test/indicator shall be approved by the local fire 
department. 

917.8 Alarm notification appliances: Alarm 
notification appliances of the approved type shall be 
provided. 

917.8.1 Visible alarms: Visible alarm notification 
appliances shall be provided in accordance with 
NFPA 72 and 521 CMR in public and common 
areas of all buildings and areas of buildings 
housing the hearing impaired and where required 
by 521CMR. In occupancies in Use Groups I-l 
and R-1, all required accessible sleeping rooms 
and suites plus an additional number of sleeping 
rooms or suites in accordance with Table 917.8.1 
shall be provided with a visible alarm notification 



appliance, activated by both the in-room smoke 
detector and the building fire protective signaling 
system. In hospital intensive care units, special 
care units and operating rooms, the audible signal 
need not be sounded; however a visual alarm shall 
be displayed with an approved device. 

917.8.1.1 Visible alarm synchronization: 
Where more than one visible signal can be 
viewed from one location the visible signals 
shall be synchronized. 

Table 917.8.1 
VISIBLE AND AUDIBLE ALARMS 



Number of sleeping 
rooms or suites 


Sleeping rooms or suites with 
visible and audible alarms 


6 to 25 
26 to 50 




1 
2 


51 to 75 
76 to 100 




3 
4 


101 to 150 
151 to 200 
201 to 300 




5 
6 
7 


301 to 400 
401 to 500 




8 
9 


501 to 1,000 
1,001 and over 


20 plus 


2% of total 
1 for each 100 over 
1,000 



917.8.2 Audible alarms: Audible alarm 
notification appliances shall be provided and shall 
sound a distinctive sound which shall not be used 
for any purpose other than that of a fire alarm. 
The audible alarm notification appliances shall 
provide a sound pressure level of 15 dBA above 
the average ambient or 5 dBA above the maxi- 
mum sound level having a duration of at least 60 
seconds ( whichever is greater ) sound level in 
every occupied space within the building. The 
minimum sound pressure levels shall be: 70 dBA 
in occupancies in Use Groups R and I-l; 90 dBA 
in mechanical equipment rooms; and 60 dBA in 
all other use groups. The maximum sound 
pressure level for audible alarm notification 
appliances shall be 120 dBA at the minimum 
hearing distance from the audible appliance. 
917.8.2.1 All audible evacuation signals shall 
have a synchronized three - pulse temporal 
pattern in accordance with NFTA 72. 

917.9 Voice/alarm signaling system: A voice/alarm 
signaling system shall be provided where required by 
other sections of 780 CMR. When activated in 
accordance with 780 CMR 917.7.1, the voice/alarm 
signaling system shall automatically sound an alert 
signal to all occupants within the building on a 
general or selective basis to the following terminal 
areas: elevators, elevator lobbies, corridors, exit 
stairways, rooms and tenant spaces exceeding 1 ,000 
square feet (93 m^) in area; dwelling units in 
occupancies in Use Group R-2; and guestrooms or 
suites in occupancies in Use Group R-1. The /ire 
command station shall contain controls to transmit 



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manually an evacuation signal and voice instructions 
on a selective and all-call basis to the terminal areas 
indicated herein. The voice/alarm system shall be 
designed and installed in accordance with the 
provisions of 780 CMR, 527 CMR and NFPA 72 
listed in Appendix A. 

Exceptions: 

1 . A distinctive signal in lieu of a voice alarm is 
permitted in an occupancy in Use Group F or S. 

2. Where the head of the fire department or 
his/her designee determines that partial or 
selective evacuation is not desired, but rather total 
evacuation is required, then a distinctive signal, in 
lieu of a voice alarm, is permitted. 

917.9.1 The sequence of operation of the voice 
alarm signaling system shall be as follows: 

1 . Sound an alert (pre-signal) tone (the alert 
tone shall be a 900 hertz tone pulsed to 
produce one round of code 4 at approximately 
one second intervals. 

2. Activate the recorded message regarding 
the evacuation procedure. The alarm and com- 
munications system shall provide a pre-record- 
ed message to all required areas. The message 
shall contain the following information. " 
attention please. The signal tone you have just 
head indicated a report of an emergency in this 
building. If your floor evacuation signal sounds 
after this message, walk to the nearest stairway 
and leave the floor. While the report is being 
verified, occupants on other floors should 
await firrther instructions." 

This message shall be transmitted three 
times. 

A female voice shall be used for this 
message. 

3. Activate the evacuation signal on the floor 
of incident and the next floor above and below 
(the evacuation signal shall be in accordance 
with 780 CMR 917.8.2.1 

917.10 Acceptance tests: Upon completion of the 
fire protective signaling system, all alarm 
notification devices and circuits, alarm indicating 
appliances and circuits, supervisory-signal initiating 
devices and circuits, signaling line circuits, and 
primary and secondary power supplies shall be 
subjected to a 100% acceptance test in accordance 
with NFPA 72 listed in Appendix A and 780 CMR 
903.0. 

780 CMR 918.0 AUTOMATIC FIRE 
DETECnON SYSTEMS 
(FIRE ALARM SYSTEMS) 
918.1 General: Automatic fire detection systems 
shall be of an approved type and shall be installed in 
accordance with the provisions of 780 CMR and 
NFPA 72 listed in Appendix A. 



918.2 Fire Protection Construction documents: 

Where an automatic fire detection system is required 
by 780 CMR, the fire protection construction 
documents shall show the location and number of all 
automatic fire detectors with specifications of the 
type of fire detector, proposed zoning and a 
complete sequence of operation for the system. The 
system shall be installed in accordance with 
780 CMR 918.0 and shall be part of and be subject 
to the requirements of a fire protective signaling 
system specified in 780 CMR 917.0. (Also see 
780 CMR 903.0) 

918.3 Approval: All devices, combinations of 
devices, appliances and equipment shall be approved 
for the fire signaling purpose for which such 
equipment is used. The automatic fire detectors 
shall be smoke detectors, except an approved 
alternative type of detector shall be installed in 
spaces such as boiler rooms where, during normal 
operation, products of combustion are present in 
sufficient quantity to actuate a smoke detector. 

918.4 Where required: An automatic fire detection 
system shall be installed and maintained in full 
operating condition in the locations described in 
780 CMR 918.4.1 through 918.4.7. 

918.4.1 Use Group A-4: An automatic fire 
detection system shall be installed in all 
occupancies of use group A-4. 

918.4.2 Use Group E: An automatic fire 
detection system shall be installed in all 
occupancies of use group E. 

918.4.3 Use Group I-l: An automatic fire 
detection system shall be installed and maintained 
in all occupancies in Use Group I-l. 

918.4.4 Use Group 1-2: An automatic fire 
detection system shall be installed and maintained 
in all occupancies in Use Group 1-2. 

Exception: Occupancies that are equipped 
throughout with an automatic sprinkler system 
in accordance with 780 CMR 906.0 and that 
comply with 780 CMR 409.0. 

918.4.5 Use Group 1-3: An automatic fire 
detection system shall be installed and maintained 
in all resident housing areas of Use Group 1-3. 
Smoke detectors shall be arranged and positioned 
to prevent damage or tampering provided that the 
ftinction and speed of detecting a fire is equivalent 
to that provided by the spacing and arrangement 
requirements of NFPA 72 listed in Appendix A. 

918.4.6 Use Group R-1: An automatic fire 
detection system shall be installed and maintained 
throughout all occupancies in Use Group R-1 and 
in accordance with Table 918. 



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FIRE PROTECTION SYSTEMS 





TABLE 918 
RESIDENTIAL FIRE PROTECTION REQUIREMENTS 


Use 
Group 


Number 
of Units 


Unit Occupant 
Protection 


Other Occupant 
Protection 


Standby 
Power 


Manual 
Stations 


Zoned 


Provision for Fire 
Department Notification 


R-3 


lor 2 


Yes 
919.3.2 


Note a. 


Yes 
919.5 


N.A. 


N.A. 


N.A. 


R-1 


3 to 12 


Yes 
919.3.1 


Yes 
918.4.6 


Yes 
917.6 


Yes 

917.4.5 


N.A. 


N.A. 


R-2 


3 to 12 


Yes 
919.3.2 


Yes 
918.4.7 


Yes 
919.5 


Yes 
917.4.6 


N.A. 


N.A. 


R-1 


13 or more 


Yes 

919.3.1 


Yes 
918.4.6 


Yes 
917.6 


Yes 
917.4.5 


Yes 

917.7.3 


Yes 
923.2 


R-2 


13 or more 


Yes 

919.3.2 


Yes 

918.4.7 


Yes 
919.5 


Yes 
917.4.6 


Yes 
917.7.3 


Yes 
923.2 



Note a: Where common areas exist. 
Exceptions; 

1 . An automatic fire detection system is not 
required in buildings that do not have interior 
corridors serving guestrooms or dwelling units 
and where all guestrooms or dwelling units 
have a means of egress door opening directly to 
an exterior exit access which leads directly to 
the exits. 

2. Guest rooms or dwelling units single or 
multiple station smoke detectors required by 
780 CMR 919.3. 1 shall also be annunciated by 
guest room or dwelling unit at a constantly 
attended location from which the fire protective 
signaling system is capable of being manually 
activated. Detector annunciation shall be capa- 
ble of operation from stand-by battery or be 
connected to an emergency electrical system. 
System smoke detectors shall be permitted 
providing they operate as follows: a. Provide 
unit occupant notification; b. Annunciate at a 
constantly attended location from which the 
fire protective signaling system is capable of 
being manually activated; c. Does not automa- 
tically activate the building notification appli- 
ances; d. Does not automatically activate the 
supervision requirements of 780 CMR 923.2; 
e. Be capable of operation including the 
required annunciation from stand-by battery. 

3. A system heat detector shall be required 
within each guest room or dwelling unit located 
not more than six feet from each door way that 
leads to an interior corridor or exit. System 
heat detectors shall not be required where the 
guestroom or dwelling unit is equipped with 
residential sprinklers that when activated will 
activate the fire protective signaling system. 

918.4.7 Use Group R-2: An automatic fire 
detection system shall be installed and maintained 
throughout all occupancies in use group R-2 and 
in accordance with table 918. 
Exceptions: 

1. An automatic fire detection system is not 
required in buildings that do not have interior 
corridors serving guestrooms or dwelling units 
and where all guestrooms or dwelling units 
have a means of egress door opening directly to 
an exterior exit access which leads directly to 
the exits. 



2. System smoke detectors are not required in 
guestrooms or dwelling units. 

3. A system heat detector shall be required 
within each guest room or dwelling unit located 
not more than six feet from each door way that 
leads to an interior corridor or exit. System 
heat detectors shall not be required where the 
guestroom or dwelling unit is equipped with 
residential sprinklers that, when activated, will 
activate the fire protective signaling system. 

918.5 Sprinklered buildings exception: Buildings 
equipped throughout with an automatic sprinkler 
system in accordance with 780 CMR 906.2.1 or 
780 CMR 906.2.2 are not required to be equipped 
with an automatic fire detection system, but are re- 
quired to be equipped with a fu^e protective signaling 
system that conforms to 780 CMR 917.0. This 
exception does not apply to Use Groups I, R- 1 , R-2, 
to high-hazard use groups in accordance with 
780 CMR 417.5.3, to special amusement buildings 
in accordance with 780 CMR 4 1 3.0, or to single-sta- 
tion smoke detectors as required in 780 CMR 919.3. 

918.6 Zones: Zoning shall be provided in 
accordance with 780 CMR 917.7.3. 

918.7 Alarm verification: Alarms activated by 
smoke detectors required by 780 CMR 918.0 shall 
be activated by a single smoke detector monitored by 
an alarm verification zone or an approved equivalent 
method. 

918.8 Local control functions: Automatic fire 
detectors utilized for the purpose of performing local 
control functions shall be a part of a fire protective 
signaling system. The detector shall, upon actuation, 
perform the intended function and activate the alarm 
notification devices or activate a visible and audible 
supervisory signal at a constantly attended location. 

Exception: In buildings not required to be 
equipped with a fire protective signaling system, 
the automatic fire detector shall be powered by 
normal electrical service and, upon actuation, 
perform the intended function. The detectors shall 
be located in accordance with NFPA 72 listed in 
Appendix A. This exception does not apply to 
smoke detectors required for elevator recall. 



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918.9 Access: Access shall be provided to each 
detector for periodic inspection, maintenance and 
testing. 

780 CMR 919.0 SINGLE- AM) MULTIPLE- 
STATION SMOKE DETECTORS 

919.1 General: Single- and multiple-station smoke 
detectors shall be of an approved type and shall be 
installed in accordance with the provisions of 
780 CMR and NFPA 72 listed in Appendix A. 

919.1.1 A control and associated equipment, 
single or multiple station alarm devices or any 
combination thereof shall be permitted to be used 
as a household fire warning system provided that 
the requirements of NFPA 72 Chapter 2 are met. 

919.2 Fire Protection Construction documents: 

Where single- and multiple station smoke detectors 
are required by 780 CMR, the fire protection 
construction documents shall show the location and 
number with specifications of the type of detector. 
(Also see 780 CMR 903.0.) 

919.3 Where required: Single and multiple station 
smoke detectors or household fire warning systems 
shall be installed and maintained in full operating 
condition in the locations described in 780 CMR 
919.3.1 through919.3.3. Any smoke detector located 
within 20 feet of a kitchen or within 20 feet of a 
bathroom containing a tub or shower shall be a photo 
electric type smoke detector. 

919.3.1 Use Group R-1: Single and multiple 
station smoke detectors or household fire warning 
systems shall be installed and maintained in the 
following locations in Use Group R- 1: 

1. In all sleeping areas; 

2. In every room or hallway in the path of the 
means of egress from the sleeping area to the 
door leading from the guestroom or suite; and 

3 . In each story within the guestroom or suite, 
including basements. 

Exception: For suites or guestrooms or 
dwelling unit with split levels and without an 
intervening door between the adjacent 
levels, a smoke detector installed on the 
upper level shall suffice for the adjacent 
lower level provided that the lower level is 
less than one full story below the upper 
level. 

919.3.2 Use Groups R-2, R-3, R-4 and R-5: 

Single and multiple station smoke detectors or 
household fire warning systems shall be installed 
and maintained in all occupancies in Use Groups 
R-2, R-3, R-4 and R-5 at the following locations: 

1. In the immediate vicinity of bedrooms; 

2. In all bedrooms; and 

3. In each story within a dwelling unit, 
including basements. 



4. In Residential Units of 1200 sq. ft. or more. 
Automatic Fire Detectors, in the form of 
Smoke Detectors shall be provided for each 
1200 square feet of area or part thereof; 
Exceptions: 

1. In dwelling units with split levels and 
without an intervening door between the 
adjacent levels, a smoke detector installed on 
the upper level shall suffice for the adjacent 
lower level provided that the lower level is 
less than one full story below the upper 
level. 

2. In buildings equipped throughout with an 
automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1, 906.2.2 
or 906.2.3, smoke detectors are not required 
in bedrooms where the bedrooms are 
equipped with residential sprinklers, 

919.3.3 Use Group I-l: Single and multiple 

station smoke detectors or household fire warning 

systems shall be installed and maintained in all 

sleeping areas in occupancies in Use Group I- 1. 

Exception: Where the building is equipped 

throughout with an automatic detection system 

in accordance with 780 CMR 918.4. 

919.4 Interconnection: Where more than one 
detector is required to be installed within an 
individual dwelling unit in an occupancy in Use 
Group R-2 , R-3 or R4, or within an individual 
guestroom or suite in an occupancy in Use Group R- 
1, the detectors shall be wired in such a manner that 
the actuation of one alarm will actuate all of the 
alarms in the individual unit. 

919.5 Battery backup: In addition to the required 
AC primary power source, required smoke detectors 
in occupancies in Use Groups R-2, R-3, R-4, R-5 
and I- 1 shall receive power from a battery when the 
AC primary power source is interrupted. 

Exception: In buildings equipped throughout with 
an automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1, 906.2.2 or 
906.2.3. 

919.6 Acceptance testing: When the installation of 
the detectors is complete, each detector - and all 
interconnecting wiring for multiple-station detectors 
shall be subject to a 100% acceptance test in 
accordance with NFPA 72 listed in Appendix A 

780 CMR 920.0 FIRE EXTINGUISHERS 

920.1 Approval: Portable fire extinguishers shall 
bear the label of an approved agency, be of an 
approved type and be installed in a location visible 
and available to the occupants. 



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FIRE PROTECTION SYSTEMS 



920.2 Where required: A portable fire extinguisher 
shall be installed in the following locations in 
accordance with NFiPA 10 listed m Appendix A: 

1 . In all occupancies in Use Group A- 1 , A-2, A- 
3,B,E,I-2,M,R-lorH; 

2. In all areas containing commercial kitchen 
exhaust hood systems; 

3. In all areas where fuel is dispensed; 

4. In all areas where a flammable or combustible 
liquid is used in the operation of spraying, coating 
or dipping; 

5. In all occupancies in Use Group 1-3 at staff 
locations. Access to portable extinguishers shall 
be permitted to be locked; 

6. On each completed floor of buildings under 
construction, other than occupancies in Use 
Group R-3. 

7. In any laboratory, shop or other room 
occupied for similar purposes; and 

8. Where required by the fire prevention code 
listed in Appendix A. 

780 CMR 921.0 SMOKE CONTROL 
SYSTEMS 

921.1 General: Smoke control systems required by 
780 CMR shall conform to the provisions of 
780 CMR 921.0 

921.2 Design criteria: The smoke control system 
shall be designed to keep the smoke layer interface 
above the highest of either the highest unprotected 
opening to adjoining spaces, or six feet (1829 mm) 
above the highest floor level of exit access open to 
the atrium for a period of 20 minutes. The limiting 
height for the smoke layer interface for stages shall 
be in accordance with 780 CMR 412.3.8.2. The 
limiting height of the smoke interface above the 
floor of the space required to be provided with 
smoke control is Z„ . Provisions shall also be made 
to provide for smoke removal fi-om the space at a 
rate of not less than two air changes per hour by 
means of natural or mechanical ventilation. 

921.2.1 Passive system: Active smoke control is 
not required where it is shown that the smoke 
interface level requirement will be met without 
operating smoke exhaust. 

921.2.1.1 Regular spaces: For spaces with flat 
ceilings, a constant horizontal cross-sectional 
area above the smoke layer interface, and an 
A/ft^ ratio between 0.9 and 14, the following 
equation shall be used to estimate the height of 
the interface at 20 minutes 



Z=0.677/-0.28/f hi ^ 
A 



Z = Height fi-om floor to the smoke interface 

(feet). 
t = Time for interface to descent to Z; Use 

1,200 seconds. 
H= Height of the space required to be 

provided with smoke control; floor to flat 

ceiling (feet). 
Q = Steady state heat release rate; Use 4,400 

Btu/sec. where the primary use group is 

M, S-1 or F-1. Otherwise use 2,000 

Btu/sec. 
A = Horizontal cross-sectional area of the 

above ceiling space being filled (square 

feet). Maximum A to be used shall be: A= 

921.2.1.2 Irregular spaces: For spaces with 
sloped or irregular ceilings, A/H^ ratios outside 
the specified range, or varying cross sections, 
the filling time shall be determined using 
numerical integration fi-om the ceiling to the 
critical smoke interface. The following 
equations shall be used to determine the rate of 
smoke production: 

Where the interface level is above the 
limiting elevation (z,) use: 

V = 17.6QJ'^Z5'5 + 3.36Q 

Where the interface level is below the 
limiting elevation (z, ) use: 

V = 16.64Qf^Z 

where: 

V = The volumetric rate of smoke production 
(cubic feet per minute). 

z, = Limiting elevation (ft) = 0.533Q^^' 

Qc = The convective portion of the heat 
release rate shall be estimated as 70 
percent of the total heat release rate, Q. 

921.2.2 Mechanical systems: Where the smoke 
filling predicted in 780 CMR 921.2.1 does not 
meet the design criteria of 780 CMR 921.2, 
mechanical exhaust shall be provided to maintain 
these conditions. 

921.2.2.1 Exhaust quantities: Sufficient 
mechanical exhaust shall be provided to 
maintain the smoke layer interface at or above 
the critical elevation for the 20-minute period. 
The volumetric rate of smoke production (V) 
shall be determined by the equations in 
780 CMR 921.2.1.2. If the rate of smoke 
exhaust is less than the rate of smoke 
production, the minimum exhaust rate to be 
supplied for smoke control shall be determined 
in accordance with Table 921.2.2.1. 



where: 



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THE MASSACHUSETTS STATE BUILDING CODE 



Table 921.2.2.1 

MINIMUM EXHAUST RATE ADJUSTMENT 

FACTOR* 





<^<o 


Z/H 






Ve/V 








0.25 


0.35 


0.50 


0.70 


0.85 


0.95 


0.2 


1.12 


1.19 


1.30 


1.55 


1.89 


2.49 


0.3 


1.14 


i.2r 


1.35 


1.63 


2.05 


2.78 


0.4 


1.16 


1.24 


1.40 


1.72 


2.24 


3.15 


0.5 


1.17 


1.28 


1.45 


1.84 


2.48 


3.57 


0.6 


1.20 


1.32 


1.52 


2.00 


2.78 


4.11 


0.7 


1.23 


1.36 


1.61 


2.20 


3.17 


4.98 


0.8 


1.26 


1.41 


1.71 


2.46 


371 


6.25 



Note a. Notation: 

Z = Design height of smoke layer interface above fire 

source. 
H = Ceiling height above fire source. 
I = Time for smoke layer interface to descend to Z(with 

exhaust) (seconds). 
tg= Value of t in absence of smoke exhaust (see 

780 CMR 92 1 .2. 1 . 1 or 92 1 .2. 1 .2) (seconds). 
y^ = Smoke control exhaust rate (minus any airflow into 

the smoke layer other than that from the plume). 
V= Volumetric smoke production rate (from the 

equations in 780 CMR 92 1 .2. 1 .2). 

921.2.3 Operation: The smoke control system 
shall be a dedicated system or shall be integrated 
with the mechanical ventilation system of the 
building. Operation of the smoke control system 
shall automatically shut down all systems and 
devices which interfere with the effective 
operation of the smoke control system. Where the 
mechanical ventilation system is designed for 
smoke control, the return air shall be moved 
directly to the outside without recirculation to 
other areas of the building. 

921.2.4 Alternative systems: An engineered 
design which will achieve the same level of 
smoke control as described in 780 CMR 921 is 
permitted in lieu of these requirements and 
otherwise in conformance with the requirements 
of780 CMR 903.2.1. 

9213 Smoke removal: Provisions shall be made to 
provide ventilation at a rate of at least two air 
changes per hour from the space reqiured to be 
provided with smoke control. This ventilation shall 
be through openable vents, separate mechanical ex- 
haust, or through the building mechanical ventilation 
system. The exhaust inlets shall be located a mini- 
mum of six feet (1829 mm) above any exit access 
walkway and above any openings into adjoining 
spaces. The smoke removal system shall be activated 
by manual controls provided for fire department use 
unless it is part of the smoke control system. 

921.4 Activation: The smoke control system shall 
be activated by actuation of the following: 

/. A utomatic sprinkler system: 

2. Smoke detectors required by 780 CMR 921 

that comply with NFPA 72 listed in Appendix A; 

and 



3. Manual controls provided for fire department 
use. 

Note: The smoke control system shall not be 
activated by a manual fire alarm system. 

921.4.1 Manual control: Manual controls shall 
be provided at a location approved by the fire 
department. 

921.4.2 Smoke detector activation: Where the 
height of the ceiling of the space required to be 
provided with smoke control exceeds 30 feet 
(9144 mm) above the floor of the space, approved 
smoke detectors shall be provided to detect smoke 
above the highest floor open to an atrium or at the 
highest point of another space required to be 
provided with smoke control. The installation of 
smoke detectors shall comply with 780 CMR 
918.0. 

921.5 Standby power: All equipment required to 
provide smoke control in floor openings connecting 
three or more stories and stage areas in accordance 
with 780 CMR 412.3.8.2 shall be equipped with a 
standby source of power that complies with 
527 CMR 12.00 as listed in Appendix A. 

921.6 Acceptance: Any required smoke control 
design that requires operation of mechanical 
equipment shall be fimctionally tested in accordance 
with 780 CMR 921.6.2 until proper operation of all 
required mechanical equipment and controls is 
demonstrated. 

921.6.1 System operation report: Prior to 
acceptance testing, a report of the required system 
operations shall be provided to the code official. 
(NOTE: also see 780 CMR 903.1. l.l.a., b. and c. 
The following items shall be included in the 
report if part of the required system: 

1. Identify type(s) of smoke control activation 
signal(s), such as sprinkler waterflow, smoke 
detection, manual, etc., and associated smoke 
control system operation(s) that are activated 
by the signals. 

2. Identify building area(s) where maximum 
mechanical exhaust to the outside is 
implemented and supply air is not provided. 

3. Identify building area(s) where maximum 
air supply is implemented and exhaust to the 
outside is not provided. 

4. Identify fan(s) which shall be "On" as 
required to implement the smoke control 
system. If multiple speed fans are used, the 
capacity at which the fans shall operate in the 
smoke control mode shall be identified. 

5. Identify fan(s) which shall be "Off' as re- 
quired to implement the smoke control system. 

6. Identify damper(s) which shall be "Open" 
to implement the smoke control system. 

7. Identify damper(s) which shall be "Closed" 
to implement the smoke control system. 



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8. Identify other functions required to 
implement the smoke control system. 

9. Identify building areas with smoke and 
heat vents and method of operation of vents. 

10. If required, identify the type(s) of standby 
power and the equipment that is served. 

921.6.2 Testing procedures: The acceptance test 
procedure shall be approved. Acceptance testing 
shall be conducted in the presence of the Building 
official and fire official or their designees or shall 
include documentation indicating that all mechanical 
equipment, control sequences, devices and 
components have been operationally tested and are 
fimctioning properly in accordance with the system 
operation report. Such documentation provided by 
a registered professional engineer or other legally 
recognized professional (M.G.L. c. 1 12, § 81R). All 
documentation from operational testing shall be 
available for inspection. Acceptance testing shall 
include the following: 

1 . Prior to beginning acceptance testing, all 
building smoke control equipment shall be 
placed in the normal operating mode. 

2. Acceptance testing shall demonstrate that 
each initiating device, fan, damper and other 
required equipment is operational and performs 
to the limits and capacity required. 

3. Acceptance testing shall demonstrate that 
correct control outputs are produced for a 
given control input for each control sequence 
specified by the system operation report. 

4. If standby power is required for the 
operation of the smoke control system, 
acceptance tests shall be conducted while on 
both normal building power and standby 
power. 

5. Opening of smoke/heat vents shall be 
demonstrated if the vent is capable of being 
opened in a maimer that does not require 
destructive testing. 



921.7 Elevators: Except when otherwise required 
by 524 CMR, where buildings are equipped with a 
mechanical smoke control system that will restrict 
smoke and hot gases from entering the elevator shaft 
in the fire floor, hoistway venting is not required. In 
high-rise buildings equipped with this system and 
equipped throughout with an automatic fire 
suppression system, the one-hour fireresistance rated 
elevator lobby as specified in 780 CMR 403.8 is not 
required. 

780 CMR 922.0 SMOKE AND HEAT VENTS 

922.1 General: Where exit access travel distance is 
increased in accordance with 780 CMR 1006.5.1, 
smoke and heat vents shall be constructed and 
installed in accordance with 780 CMR 922.0. 

922.2 Vent size and spacing: The vent area and the 
spacing of the vents shall comply with Table 922.2. 

922.2.1 Releasing devices: Smoke and heat vents 
shall open automatically by activation of a heat- 
responsive device rated at 100°F (38°C) to 220°F 
(104°C) above ambient The releasing mechanism 
shall be capable of operation such that the vent 
shall fiilly open when the vent is exposed to a 
time-temperature gradient that reaches an air 
temperature of 500°F (260°C) within five 
minutes. Vents shall be capable of being opened 
by an approved manual operation. 

9223 Curtain board construction: Curtain boards 
shall be provided to subdivide a vented building. 
Curtain boards shall be constructed of material that 
will resist the passage of smoke and is consistent 
with the building type of construction. Curtain board 
location and depth shall comply with Table 922.2. 
The bottom of the curtain board shall be level. 



Table 922.2 

SMOKE AND HEAT VENT SIZE AND 

SPACING'' 



Use 
Group 


Hazard 

classsification of 

contents 


Vent height 

above the 

floor, H 

(feet) 


Minimum 

curtain board 

depth from 

vent bottom 

(feet) 


Maximum 
area formed 

by curtain 

boards 
(square feet) 


Vent area to 

floor area 

ratio 


Maximum 

spacing of 

vent centers 

(feet) 


Maximum 

distance 

from wall of 

curtain 
boards (feet) 


Maximum 
distance 
between 
curtain 
boards 


F-I 


- 


- 


0.2XH 
buti4 


50,000 


1:100 


120 


60 


8XH 
but i250 feet 


S-1 


I through IV 


20 or less 


6 


10,000 


1:100 


100 


60 


8XH 


S-1 


1 through IV 


Over 20 to 
40 


6 


8,000 


1:75 


100 


55 


8XH 
but s250 feet 


S-1 


1 through IV 


20 or less 


4 


3,000 


1:75 


100 


55 


8XH 


s-1 


I through IV 


Over 20 to 
40 


4 


3,000 


1:50 


100 


50 


8XH 
but s250 feet 


s-1 


V 


20 or less 


6 


6,000 


1:50 


100 


50 


8XH 


s-1 


V 


Over 20 to 
30 


6 


6,000 


1:40 


90 


45 


8XH 


s-1 


V 


30 or more 


4 


2,000 


1,30 


75 


40 


8XH 

but 5 100 feet 



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THE MASSACHUSETTS STATE BUILDING CODE 

Note a. See NFiPA 23 1. C listed in Appendix A for classification of Contents Class I through TV Class V commodities 
are products that present special fire hazards beyond those of Class I, U, 111 or IV, such as aerosols, foam plastic, PVC, 
PU, PS and asphalt paper. 
Note b. 1 foot = 304.8 mm; 1 square foot = 0.093 m . 



780 CMR 923.0 SUPERVISION 

923.1 Fire suppression systems: All automatic 
fire suppression systems required by 780 CMR shall 
be supervised by one of the following methods 
below. 

1 . AUL listed or FM approved Central Station 
Service in accordance with NFPA 72 listed in 
Appendix A. 

2. a. Approved proprietary supervising station 
system, in accordance with NFPA 72 in 
accordance with NFPA 72 as listed in 
Appendic A. 

b^ Approved remote station fire alarm system 
supervising station in accordance with NFPA 
72 as listed in Appendix A. 

3. Alarm signals to an approved Auxiliary Fire 
Alarm System in accordance with NFPA 72, with 
supervisory signals supervised by one or two 
above or at a constantly attended location 
approved by the local fire department, having 
persoimel on duty trained to recognize the type of 
signal received and to take prescribed action. This 
shall be permitted to be a location different from 
that at which alarm signals are received. 

Exceptions: 

1. Underground gate valves with roadway 
boxes. 

2. Halogenated extinguishing systems that are 
not an integral part of a required automatic fire 
suppression system. 

3. Carbon dioxide extinguishing systems that 
are not an integral part of a required automatic 
fire suppression system. 

4. Dry- and wet-chemical extinguishing 
systems. 

5. Limited area sprinkler systems (see 
780 CMR 907.0). 

6. Occupancies in Use Group R complying 
vidth 780 CMR 906.2.2 and supervised in 
accordance with NFPA 13R listed in 
Appendix A. 

923.1.1 Re-transmission of alarm signals 
received by central stations: In all cases, central 
stations shall re-transmit alarm signals within 90 
seconds of receipt, to the fire department having 
jurisdiction. 

923.2 Fire protective signaling systems and 
automatic fire detection systems: All fire 
protective signaling systems and automatic fire 
detection systems required by 780 CMR shall be 
supervised by one of the following methods below: 

1 . AUL listed or FM approved Central Station 
Service in accordance with NFPA 72 listed in 
Appendix A. 



2. a. Approved proprietary supervising station 
system, in accordance with NFPA 72 in 
accordance with NFPA 72 as listed in 
Appendic A. 

b. Approved remote station fire alarm system 
supervising station in accordance with NFPA 
72 as listed in Appendix A. 

3. Alarm signals to an approved Auxiliary Fire 
Alarm System in accordance with NFPA 72, with 
supervisory signals supervised by one or two 
above or at a constantly attended location 
approved by the local fire department, having 
personnel on duty trained to recognize the type of 
signal received and to take prescribed action. This 
shall be permitted to be a location different from 
that at which alarm signals are received. 

Exceptions: 

1 . For use group R see table 918 

2. Single- and multiple-station detectors as 
required by 780 CMR 919.0. 

3. Smoke detectors in occupeuicies in Use 
Group 1-3 (see 780 CMR 917.7.1). 

4. Smoke detectors in patient sleeping rooms 
in occupancies in Use Group 1-2 (see 
780 CMR 409.5.1). 

5. Fire protective signaling systems in 
occupancies in Use Groups H. 

923.2.1 Re-transmission of alarm signals 
received by central stations: In all cases, central 
stations shall re-transmit alarm signals within 90 
seconds of receipt, to the fire department having 
jurisdiction. 

780 CMR 924.0 FIRE PUMPS 

924.1 General: Where fire pumps are required to be 
installed as part of a required or non-required 
system(s), the fire pump(s) shall be designed and 
installed in accordance with 527 CMR 12.00 and 
NFPA 20 as listed in Appendix A. 

924.2 Rooms: Fire pumps and all related equipment 
shall be located m a dedicated room meeting the 
physical and environmental features of NFPA 20 
listed in Appendix A, and enclosed with not less 
than two hours fire resistive construction. Fire 
pumps rooms shall have either direct access to the 
room from grade or access by a two hour rated 
passageway and shall be properly secured from 
unauthorized entry. 

924.3 Emergency power: All fire pumps shall be 
provided with emergency power when installed in 
the following types of buildings or use groups. 
Emergency power equipment installation shall 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

FIRE PROTECTION SYSTEMS 

confonn to 527 CMR 12.00 and NFPA 20 as listed 3. Buildings and structures of Use Group E, with 

in Appendix A . a total occupant load of more than 300 occupants. 

1. High-rise buildings £is defined by M.G.L. 4. Buildingsandstructuresof Use Group H. 

c. 148 § 26A and 780 CMR. 5. Buildings and structures of Use Group I, 

2. Buildings and structures of Use Group A, with having surgery or treatment areas, 
a total occupant load of more than 300 occupants. 



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THE MASSACHUSETTS STATE BUILDING CODE 

NON-TEXT PAGE 



170 780 CMR - Sixth Edition 2/7/97 (Effective 2/28/97) 



CHAPTER 10 



MEANS OF EGRESS 



780 CMR 1001.0 GENERAL 

1001.1 Scope: The provisions of 780 CMR 10 shall 
control the design, construction and arrangement of 
building elements required to provide a reasonably 
safe means of egress from all structures. 

1001.2 Modification of egress requirements: 

Where strict compliance with the provisions of 
780 CMR is not practical, the code ofiBcial shall 
approve alternative means of egress which will 
accompUsh the same purpose, by the procedure 
established in 780 CMR 1 for modification of 
780 CMR, or by adoption of approved rules. 

1001.3 Minimum requirements: It shall be 
unlawful to alter any building or structure in any 
manner that will reduce the number of exits or the 
capacity of exits below the requirements of 
780 CMR for new buildings of the proposed 
occupancy. 

780 CMR 1002.0 DEFINITIONS 
1002.1 General: The following words and terms 
shall, for the purposes of 780 CMR 10 and as used 
elsewhere in 780 CMR, have the meanings shown 
herein. 

Aisle accessway: That portion of an exit access 
which provides a path of travel to an aisle (see 
780 CMR 1012.0). 

Alternating tread stairway: A stair that has a series 
of steps between 50° and 70° (0.87 and 1.22 rad) 
from horizontal, usually attached to a center 
support rail in an alternating manner so that the 
user of the stairs never has both feet on the same 
level at the same time (see 780 CMR 1014.6.6). 

Bleachers: A grandstand where the seats are not 
provided with backrests (see 780 CMR 1013.0.) 

Common path of travel: That portion of exit access 
which the occupants are required to traverse 
before two separate and distinct paths of travel to 
two exits are available. Paths that merge are 
common paths of travel. A common path of travel 
is measured the same as travel distance but 
terminates at that point where two separate and 
distinct routes become available (see 780 CMR 
1011.2.1). 

Corridor: An enclosed passageway which limits the 
means of egress to a single path of travel (see 
780 CMR 1011.0). 



Exit: That portion of a means of egress which is 
separated from all other spaces of a building or 
structure by construction and opening protectives 
as required for exits to provide a protected way of 
travel to the exit discharge (see 780 CMR 
1006.0). Exits include exterior exit doors, exit 
stairways (see 780 CMR 1014.0 and 1015.0), exit 
passageways (see 780 CMR 1020.0) and 
horizontal exits (see 780 CMR 1019.0). 

Exit access: Exit access is that portion of a means of 
egress which leads to an entrance to an exit (see 
780 CMR 1011.0). 

Exit discharge: That portion of a means of egress 
between the termination of an exit and a public 
way (see 780 CMR 1006.3). 

E)dt discharge, level of: The horizontal plane 
located by the point at which an exit terminates 
and an exit discharge begins (see 780 CMR 
1006.3.1). 

Exit, horizontal: A way of passage from one 
building to an area of refiige in another building 
on approximately the same level, or a way of 
passage through or around a wall or partition to an 
area of refijge on approximately the same level in 
the same building, which affords safety from fire 
or smoke from the area of incidence and areas 
communicating therewith (see 780 CMR 1019.0). 

Floor area, gross: Gross floor area shall be the floor 
area within the perimeter of the outside walls of 
the building under consideration, without 
deduction for hallways, stairs, closets, thickness 
of walls, columns or other features (see 780 CMR 
1008.0). 

Floor area, net: To determine the number of 
persons for whom exits are to be provided, the net 
floor area shall be the actual occupied area and 
shall not include unoccupied accessory areas or 
thickness of walls (see 780 CMR 1008.0). 

Grade hallway, grade lobby, grade passageway: An 

enclosed hallway or corridor that is an element of 
an exit, and terminates at a street or an open space 
or court communicating with a street (see 
780 CMR 1020.0). 

Grandstand: A staicture providing tiered or stepped 
seating (see 780 CMR 1013.0). 

Means of egress: A continuous and unobstructed 
path of travel from any point in a building or 



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780 CMR: STATE BOARD OF BmLDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



structure to a public way. A means of egress 
consists of three separate and distinct parts: the 
exit access, the exit, and the exit discharge. A 
means of egress comprises the vertical and 
horizontal means of travel and shall include 
intervening room spaces, doors, hallways, 
corridors, passageways, balconies, ramps, stairs, 
enclosures, lobbies, horizontal exits, courts and 
yards (see 780 CMR 1006.0). 

Occupant load; The total number of persons that 
are permitted to occupy a building or portion 
thereof at any one time (see 780 CMR 1008.0). 

Riblic way Any street, alley or other parcel of land 
open to the outside air leading to a public street, 
which has been deeded, dedicated or otherwise 
permanently appropriated to the public for public 
use and which has a clear width and height of not 
less than ten feet (3048 mm). 

Slidescape: A straight or spiral chute, erected on the 
interior or exterior of a building, which is 
designed as a means of egress direct to a street or 
other public way (see 780 CMR 1026.0). 

Smokeproof enclosure An enclosed stairway, with 
access from the floor area of the building either 
through outside balconies or ventilated vestibules, 
opening on a street, yard or open court, and with 
a separately enclosed direct exit to the street at the 
grade floor (see 780 CMR 1015.0). 

Stairway One or more flights of stairs, and the 
necessary landings and platforms connecting 
them, to form a continuous and uninterrupted 
passage from one floor to another (see 780 CMR 
1014.0). 

Winder: A step in a winding stairway (see 
780 CMR 1014.6.3). 

780 CMR 1003.0 CONSTRUCTION 
DOCUMENTS 

1003.1 Arrangement of egress: The construction 
documents shall show in sufficient detail the 
location, construction, size and character of all exits, 
together with the arrangement of aisles, corridors, 
passageways and hallways leading thereto in 
compliance with the provisions of 780 CMR. 

1003.2 Number of occupants: In other than 
occupancies in Use Groups R-2, R-3 and I-l, the 
construction documents and the application for a 
permit shall designate the number of occupants to be 
accommodated on every floor, and in all rooms and 
spaces as required by the code official. Unless 
otherwise specified, the minimum number of 
occupants to be accommodated by the exits shall be 
determined by the occupant load prescribed in 
780 CMR 1008.0. The posted occupant load of the 



building shall be limited to that number. The fire 
prevention code official shall be informed in writing 
of the calculated occupant load. 

1003.3 Posted occupant load Every assembly 
room or space in an assembly occupancy shall have 
the approved occupant load of the room or space 
posted in a conspicuous place, near the main 
entrance to the room or space. Rooms or spaces 
which have multiple-use capabilities shall be posted 
for all such occupancies. All posted signs shall be of 
an approved legible permanent design 

780 CMR 1004.0 USE GROUP AND 
OCCUPANCY REQUIREMENTS 

1004.1 New buildings: Every building and 
structure, and part thereof, hereafter erected shall 
have the prescribed number of exits of one or more 
of the approved types defined in 780 CMR 10. 
Exits, in combination with the exit access and exit 
discharge, shall provide safe and continuous means 
of egress to a street or to an open space with direct 
access to a street. 

1004.2 Hazardous Means of Egress. 

1004.2.1 Exit Order/Hazardous Means of 
Egress: In any existing building or structure not 
provided with exit facilities as herein prescribed 
for new buildings and in which the exits are 
deemed hazardous or dangerous to life and limb, 
the building official shall declare such building 
dangerous and unsafe in accordance with the 
provisions of 780 CMR 121.0. 

1004.2.2 Appeal from exit order: Any person 
served with any order pursuant to 780 CMR 
3400.5 shall have the remedy prescribed in 
780 CMR 121. 

1004.3 Multiple occupancies: Where a building is 
occupied by two or more occupancies, the means of 
egress requirements shall apply to each portion of 
the building based on the occupancy of space 

1004.4 Multiple tenants: Where more than one 
tenant occupies any one floor of a building or 
structure, each tenant shall be provided with direct 
access to approved exits. 

780 CMR 1005.0 GENERAL LIMITATIONS 

1005.1 Exits: An exit shall not be utilized for any 
purpose that interferes with its fiinction as a means 
of egress. 

1005.2 Floor openings: Manholes or floor access 
panels which reduce the clearance to less than 32 
inches (813 mm) shall not be located in the line of 
means of egress. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

MEANS OF EGRESS 



1005.3 Protruding objects: A minimum headroom 
of 80 inches (2032 mm) shall be provided for any 
walidng surface, including walks, halls, corridors, 
aisles and passageways. Structural elements, 
fixtures or fiimishings shall not project from either 
side more than four inches (102 mm) over any 
walking surface between the heights of 27 (686 mm) 
and 80 inches (2032 mm) above the walking surface. 
A free-standing object mounted on a post(s) or 
pylon(s) shall not overhang that post(s) or pylon(s) 
more than 12 inches (305 mm) where the lowest 
point of the leading edge is more than 27 inches (686 
mm) and less than 80 inches (2032 mm) above the 
walking surface. Door closers and stops shall not 
reduce headroom to less than 78 inches (1981 mm). 

1005.4 Floor surface: All floors of corridors and 
lines of means of egress shall have a slip-resistant 
surface. 

1005.5 Open-sided floor areas: Guards shall be 
located along open-sided walking surfaces, 
mezzanines and landings which are located more 
than 30 inches (762 mm) above the floor or grade 
below. The guards shall be constructed in 
accordance with 780 CMR 1021.0 

Exception: Guards are not required on the 
loading side of loading docks and the auditorium 
side oi stages and raised platforms. 

1005.6 Elevation change: Where changes in 
elevation exist in exit access corridors, exits or exit 
discharge, ramps shall be used where the difference 
in elevation is less than 12 inches (305 mm). 

Exception: A maximum step height of eight 
inches (203 mm) shall be permitted for buildings 
with occupancies in Use Groups F, H, R and S at 
exterior doors not required to be accessible by 
521 CMR, the Rules and Regulations of the 
Architectural Access Board, referenced in 
780 CMR 11, and listed in Appendix A. 

1005.7 Egress elements for air movement: Exits 
and exit access corridors shall not be used as supply 
or return air ducts or plenums. 

Exceptions: 

1 The restriction on the use of the space 
between the corridor ceiling and the floor or 
roof structure above as a return air plenum 
shaU not apply where the corridor is not 
required to be of fireresistance rated 
construction or is separated from the plenum 
by fireresistance rated construction or is 
located within a dwelling unit. 
2. This restriction shall not apply to exit 
access corridors located within tenant spaces 
that are 1,000 square feet (92 m^ ) or less in 
area. 



780 CMR 1006.0 TYPES AND LOCATION 
OF MEANS OF EGRESS 

1006.1 General: All approved means of egress, 
including doorways, passageways, corridors, 
interior stairways, exterior stairways, smokeproof 
enclosures, ramps, horizontal exits, bridges, 
balconies, fire escapes and combinations thereof, 
shall be arranged and constructed as provided for in 
780 CMR. 

1006.2 Arrangement: All required exits shall be so 
located as to be discemable with unobstructed access 
thereto. 

1006.2.1 Egress through adjoining spaces: 

Egress from a room or space shall not open into 
an adjoining or intervening room or area, except 
where such adjoining room or area is accessory to 
the area served, is not a high-hazard occupancy 
and provides a direct means of egress to an exit 
A maximum of one exit access shall be permitted 
to pass through a kitchen, storeroom, restroom, 
closet or similar space provided that passage 
through such space is not the only means of 
access to an exit. An exit access shall not pass 
through a room subject to locking Means of 
egress from dwelling units, rooming units, 
guestrooms and dormitory units shall not lead 
through other such units, or through toilet rooms 
or bathrooms. 

1006.2.2 Assembly buildings: All buildings 
occupied for assembly purposes shall front on at 
least one street on which the main entrance and 
exit discharge shall be located. Where there is a 
single main entrance, the entrance shall be 
capable of serving as the main exit and shall 
provide an egress capacity for at least one-half of 
the total occupant load. In addition to having 
access to a main exit, each level of an occupancy 
in Use Group A shall be provided with additional 
exits which shall provide a means of egress 
capacity for at least one-half of the total occupant 
load served by that level. 

1006.2.3 Skating rinks: Places of assembly used 
for skating rinks shall not be located below the 
floor nearest grade. 

1006.2.4 Foyers and waiting spaces: The term 
"foyer" shall mean an enclosed space surrounding, 
or in the rear of, the auditorium of a theater or 
other place of assembly which is completely 
separated from the auditorium and is used as an 
assembly or waiting space for the occupants. In 
Use Group A-1, a foyer, waiting space or lobby 
shall be provided with a net floor area, exclusive 
of stairs or landings, of not less than 1 Vz square 
feet (0.14 m^) for each occupant having access 
thereto. The use of foyers and lobbies and other 
available spaces for harboring occupants until 
seats become available shall not encroach upon 



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THE MASSACHUSETTS STATE BUILDING CODE 



the clear floor area herein prescribed or upon the 
required clear width of front exits. 

1006.2.4.1 Egress: Where the foyer is not 
directly connected to the public street through 
the main lobby, an unobstructed corridor or 
passage shall be provided which leads to, and 
equals the required minimum width of, main 
entrances and exits. A mirror shall not be 
placed so as to give the appearance of a 
doorway, exit or passageway. 

1006.2.4.2 Gradient: The rear foyer shall be 
at the same level as the back of the auditorium 
and the means of egress leading therefrom 
shall not have a steeper gradient than one unit 
vertical in eight units horizontal (1:8). 

1006.2.4.3 Construction: In occupancies in 
Use Group A-1, other than motion picture 
theaters, the fire separation assemblies 
separating the foyer from the auditorium and 
other adjoining rooms and spaces shall be 
constructed with not less than a two-hour 
&eresistance rating. Where opening 
protectives are constructed of noncombustible 
materials, a fireresistance rating of the opening 
protectives is not required. 

1006.3 Exit Discharge: All exits shall discharge 
directly at a public way or at a yard, court or open 
space of the required width and size to provide all 
occupants with a safe access to s. public way. 

1006.3.1 Level of exit discharge protection: In 

all buildings having habitable or occupiable 
stories or basements below grade, the floor/ceiling 
assemblies and supports which are constructed 
below the level of exit discharge shall provide a 
fireresistance rating of not less than one hour. 
Exceptions: 

1 . Occupancies in Use Group R-3 . 

2. Buildings of Type 1 construction. 

3. Where floor/ceiling assembhes and supports 
are constructed of Type 4 construction. 

4. Where the floor areas below the level of 
exit discharge are equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.2. 1 or 906.2.2. 

5. Occupiable stories or basements below 
grade which have exits that discharge directly 
to grade. 

1006.4 Remote location: Wherever more than one 
exit is required from any room, space or floor of a 
building, such exits shall be placed as remote from 
each other as practicable, and shall be arranged and 
constructed to provide direct access in separate 
directions from any point in the area served so as to 
minimize the possibility that both exits will be 
blocked by any one fire or other emergency 
condition. 



1006.4.1 Remoteness: Where two exits or two 
exit access doors are required, each shall be 
placed a distance apart equal to not less than one- 
half of the length of the maximum overall 
diagonal dimension of the building or area to be 
served Where exit enclosures are provided as a 
portion of the required means of egress and are 
interconnected by a corridor conforming to the 
requirements for corridor construction, the exit 
separation distance shall be measured along the 
line of travel within the corridor. In all other 
cases, the separation distance shall be measured in 
a straight line between exits or exit access doors 
Exception: In buildings equipped throughout 
with an automatic sprinkler system in 
accordance with 780 CMR 906.2. 1 or 906.2.2, 
the minimum separation distance shall be Vi of 
the length of the maximum overall diagonal 
dimension 

1006.4.1.1 Three or more: Where three or 
more exits or exit access doors are required, at 
least two exits or exit access doors shall be 
separated as provided for in 780 CMR 
1006.4.1. 

1006.5 Length of travel All exits shall be so 
located that the maximum length of exit access 
travel, measured from the most remote point to an 
approved exit along the natural and unobstructed line 
of travel, shall not exceed the distances given in 
Table 1006.5 

Table 1006.5 
LENGTH OF EXIT ACCESS TRAVEL^ 





Without 


With 


Use Group 


spiinkler system 


sprinkler system 




(feet)' 


(feet)' 


A,B,E,F-1,I-1,M,R, 

S-! 

F-2, S-2 


200 


250 


300 


400 


H-l 


25 


75 


H-2 


50 


100 


H-3 


100 


150 


H-4 


125 


175 


1-2. 1-3 


ISO 


200 



Note a. See the following sections for modification to 
travel distance requirements. 

780 CMR 402.5.1: For the exit access travel distance 

in malls. 

780 CMR 404 7: For the exit access travel distance 

limitation through an atrium space. 

780 CMR 416.6: For the exit access travel distance 

limitation in HPM use facilities. 

780 CMR 1006.5.1: For increased limitation m Use 

Groups F-1 andS-1. 

780 CMR 1006.5.2: For increased limitation m Use 

Group A-5. 

780 CMR 1010.3: For buildings with one exit. 

780 CMR 3104.9: For the exit access travel distance 

limitation in temporary structures. 

Note b. Buildings equipped throughout with an 
automatic sprinkler system in accordance with 780 CMR 
906.2.1 or 906.2.2. 

Notec. 1 foot= 304.8 mm. 



174 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

MEANS OF EGRESS 



1006.5.1 Roof vent increase: In buildings which 
are one story in height, equipped with automatic 
heat and smoke roof vents complying with 
780 CMR 922.0 and equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.2.1, the exit access travel distance 
limitation in Table 1006.5 for occupancies in Use 
Group F-1 or S-1 shall be increased to 400 feet 
(122 m). 

1006.5.2 Use Group A-5: Occupancies in Use 
Group A-5, where all portions of the means of 
egress are essentially open to the outside, shall 
have an exit access travel distance of not more 
than 400 feet (122 m), except that such 
occupancies in buildings and structures of Type 1 
or 2 construction shall not have an exit access 
travel distance limitation. 

1006.6 Elevators, escalators and moving walks: 

Elevators, escalators and moving walks shall not be 
accepted as a required element of the means of 
egress. 

Exception: An elevator conforming to 780 CMR 
1007.3 shall be permitted for an accessible means 
of egress. 

1006.7 Common path of travel: The common path 
of exit access travel distance for occupants to reach 
a point where two separate and distinct paths of 
travel are available to two exits shall not exceed 100 
feet (30480 mm) in occupancies in Use Group 1-3. 

780 CMR 1007.0 ACCESSIBLE MEANS 
OF EGRESS 

1007.1 General: All spaces required to be 
accessible by 521 CMR, the Rules and Regulations 
of the Architectural Access Board, referenced in 
780 CMR 11, and listed in Appendix A shall be 
provided with not less than one accessible means of 
egress that complies with 780 CMR 1007.0. Where 
more than one means of egress is required from any 
required accessible space, each accessible portion of 
the space shall be served by not less than two 
accessible means of egress. Each accessible means 
of egress shall provide a continuous path of travel 
fi-om a required accessible space to a public way 
which is usable by a mobility impaired person and 
shall include accessible routes, ramps, exit 
stairways, elevators, horizontal exits or smoke 
barriers. 

1007.2 Exit stairways: An exit stairway to be 
considered part of an accessible means of egress 
shall have a clear width of at least 48 inches (1219 
nmi) between handrails and shall either incorporate 
an area of refiige within an enlarged story-level 
landing or shall be accessed from an area of refuge 
complying with 780 CMR 1007.5 or a horizontal 
exit. 



Exceptions: 

1. Stairs serving a single dwelling unit or 
guestroom. 

2. Occupancies equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.2.1. 

3. The clear width of 48 inches (1219 mm) 
between handrails is not required for exit 
stairways accessed from a horizontal exit. 

10073 Elevators: An elevator, to be considered 
part of an accessible means of egress, shall comply 
with 524 CMR and standby power shall be provided 
in accordance with 527 CMR 12.00 as listed in 
Appendix A. The elevator shall be accessed from an 
area of refuge complying with 780 CMR 1007.5 or 
a horizontal exit. In buildings where a required 
accessible floor is four or more stories above or 
below a level of exit discharge serving that floor, at 
least one elevator shall be provided and shall serve 
as one required accessible means of egress. 
Exceptions: 

1. In buildings equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.2.1, the elevator shall not be 
required to serve floors which are located at or 
above the level of exit discharge and provided 
with a horizontal exit complying with 780 CMR 
1019.0. 

2. Elevators are not required to be accessed from 
an area of refuge or a horizontal exit in 
occupancies equipped throughout with an 
automatic sprinkler system in accordance with 
780 CMR 906.2.1. 

1007.4 Platform lifts: Platform (wheelchair) lifts 
shall not serve as part of an accessible means of 
egress except within a dwelling unit. 

1007.5 Areas of refuge: Every required area of 
refiige shall be accessible from the space it serves by 
an accessible means of egress. The maximum travel 
distance from any accessible space to an area of 
refiige shall not exceed the travel distance permitted 
for the occupancy in accordance with 780 CMR 
1006.5. Every required area of refuge shall have 
direct access to an exit stairway complying with 
780 CMR 1007.2 or an elevator complying with 
780 CMR 1007.3. "Where an elevator lobby is used 
as an area of refuge, the shaft and lobby shall 
comply with 780 CMR 1015.0 for smokeproof 
enclosures except where the elevators are in an area 
of refiige formed by a horizontal exit or smoke 
barrier. 

Exception: Areas of refuge are not required in 
open parking structures 

1007.5.1 Size: Each area of refuge shall be sized 
to accommodate one wheelchair space of 30 
inches (762 mm) by 48 inches (1219 mm) for 
each 200 occupants or portion thereof, based on 
the occupant load of the area of refuge and all 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



areas served by the area of refuge. Such 
wheelchair spaces shall not reduce the required 
means of egress width. Access to any of the 
required wheelchair spaces in an area of refuge 
shall not be obstructed by more than one 
adjoining wheelchair space. 

1007.5.2 Separation: Each area of refuge shall 
be separated from the remainder of the story by a 
smoke barrier complying with 780 CMR 712.0. 
Each area of refuge shall be designed to prevent 
the intrusion of smoke, except those areas of 
refuge located within a stairway enclosure or 
those areas of refuge where the area of refuge and 
all areas served by the area of refuge are equipped 
throughout with an automatic sprinkler system in 
accordance with 780 CMR 906.2. 1 . 

1007.53 Communication system: Every area of 
refiige in buildings more than four stories in 
height shall be provided with a two-way 
emergency communication system between the 
area of refuge and a central control point. 

In each area of refuge provided with a two- 
way emergency communication system, 
instructions on the use of the area under 
emergency conditions shall be posted adjoining 
the communication system. The instructions shall 
include: 

1 . Directions to other means of egress; 

2. Advice that persons able to use the exit 
stairs do so as soon as possible unless they are 
assisting others; 

3. Information on how to summon planned 
availability of assistance in the use of stairs or 
supervised operation of elevators; and 

4. Directions for use of the two-way 
emergency communication system. 

1007.5.4 Identification: Each door providing 
access to an area of refuge from an adjacent floor 
area shall be identified by a sign complying with 
521 CMR and CABO Al 17.4 listed in Appendix 
A stating "Area of Refuge" and the International 
Symbol of Accessibility. The sign shall be 
illuminated as required for "Exit" signs where 
"Exit" sign illumination is required. Additionally, 
tactile signage complying with 521 CMR listed in 
Appendix A shall be located at each door to an 
area of refiige. 

1007.6 Signage: Signage indicating the location of 
accessible means of egress shall be installed at all 
exits and elevators that serve a required accessible 
space, but which are not an approved accessible 
means of egress. 

780 CMR 1008.0 OCCUPANT LOAD 
1008.1 Design occupant load: In determining 
required facilities, the number of occupants for 
whom exit facilities shall be provided shall be 
established by the largest number computed in 



accordance with 780 CMR 1008.1.1 through 
1008.1.3. 

1008.1.1 Actual number: The actual number of 
occupants for whom each occupied space, floor or 
building is designed. 

1008.1.2 Number by Table 1008.1.2: The 

number of occupants computed at the rate of one 
occupant per unit of area as prescribed in Table 
1008.1.2. 

1008.13 Number by combination: The number 
of occupants of any space as computed in 
780 CMR 1008.1.1 or 1008.1.2 plus the number 
of occupants similarly computed for cdl spaces 
that discharge through the space in order to gain 
access to an exit. 

1008.1.4 Increased occupant load: The 

occupant load permitted in any building or portion 
thereof is permitted to be increased from that 
number established for the occupancies in Table 
1008.1.2 provided that all other requirements of 
780 CMR are also met based on such modified 
number. Where required by the code official, an 
approved aisle, seating or fixed equipment 
diagram to substantiate any increase in occupant 
load shall be submitted. Where required by the 
code official, such diagram shall be posted. 

Table 1008.1.2 

MAXIMUM FLOOR AREA ALLOWANCES 

PER OCCUPANT 





Floor area in 


Occupancy 


square feet per 




occupant 


Assembly with fixed seats See7g0 CMR 1008. 1 .6 


Assembly without fixed seats 




Concentrated (chairs only - not fixed) 


7 net 


Standing space 


3 net 


Unconcentrated (tables and chairs) 


15 net 


Bowling centers, allow 5 persons for 




each lane including 15 feet of 




: runway, and for additional areas 


7 net 


Business areas 


100 gross 


Courtrooms - other than fixed seating 


40 net 


areas 





Educational 

Classroom area 20 net 

Shops and other vocational room 50 net 
areas 

Industrial areas 100 gross 

Ii^stitutional areas 

Inpatient treatment areas 240 gross 

Outpatient areas 1 00 gross 

Sleeping areas 120 gross 

Library 

Reading rooms 50 net 

Stack area 100 gross 

Mercantile, basement and grade floor 30 gross 

areas 

Areas on other floors 60 gross 

Storage stock, shipping areas 300 gross 



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MEANS OF EGRESS 



Occupancy 



Floor area in 

square feet per 

occupant 



Parking garages 200 gross 

Residential 200 gross 

Storage areas, mechanical equipment 300 gross 



Note a. 1 foot = 304.8 inm; 1 square foot = 0.093 in- 

1008.1.5 Maximum occupant load: The 

occupant load of any space or portion thereof 
shall not exceed one occupant per three square 
feet (0.28 m^) of occupiable floor space. 

1008.1.6 Fixed seats; The occupant load for an 
assembly or educational area having fixed seats 
shall be determined by the number of fixed seats 
installed. The capacity of fixed seats without 
dividing arms shall equal one person per 18 
inches (457 mm). For booths, the capacity shall 
be one person per 24 inches (610 mm). 

1008.2 Mezzanine levels: The occupant load of a 
mezzanine level discharging through a floor below 
shall be added to that floor's occupant load, and the 
capacity of the exits shall be designed for the total 
occupant load thus established. 

1008.3 Roofs: Roof areas occupied as roof gardens 
or for assembly, educational, storage or other 
purposes, shall be provided with exit facilities to 
accommodate the required occupant load, but there 
shall not be less than two approved means of egress 
from roof areas of Use Groups A and E. 

780 CMR 1009.0 CAPACITY OF EGRESS 
COMPONEISTS 

1009.1 General: The capacity oi means of egress 
for a floor, balcony, tier or other occupied space 
shall be sufficient for the occupant load thereof 

1009.2 Minimum width: The width of each means 
of egress component shall not be less than the width 
computed in accordance with Table 1009.2 for the 
required capacity of the component, but not less than 
the minimum width as prescribed by 780 CMR for 
each such component. 

Table 1009.2 
EGRESS WIDTH PER OCCUPANT 





Without sprinkler 


With sprinkler 




system (inches per 


system . 


Use group 


person) 


(inches per person) 














Doors 




Doors 




Stairways 


ramps and 
corridors 


Stairways 


ramps and 
corridors 


A, B, E, F, M, 










R,S 


0,3 


0.2 


0.2 


0.15 


H 


0.7 


0.4 


0.3 


0.2 


I-l 


0.4 


0.2 


0.2 


0.2 


1-2 


I.O 


0.7 


0.3 


0.2 


1-3 


0.3 


0.2 


0,^ 


0.2 



Note a. Buildings equipped throughout with an 
automatic sprinkler system in accordance with 780 CMR 
906.2.1 or 906.2.2. 

Note b. 1 inch = 25.4 mm. 

1009.3 Exit design per floor: Where exits serve 
more than one floor, only the occupant load of each 
floor considered individually shall be used in 
computing the required capacity of the exits at that 
floor, provided that the exit capacity shall not 
decrease in the direction oi means of egress travel. 

1009.4 Egress convergence: Where means of 
egress from floors above and below converge at an 
intermediate floor, the capacity of the means of 
egress from the point of convergence shall not be 
less than the sum of the two. 

780 CMR 1010.0 ^fUMBER OF EXITS 

1010.1 General: The general requirements of 
780 CMR 1010.0 apply to buildings of all use 
groups. Where more restrictive requirements are 
provided in 780 CMR, such requirements shall take 
precedence over the general provisions of 780 CMR 
1010.0. 

1010.2 Minimum number: Every floor area shall 
be provided with the minimum number of approved 
independent exits as required by Table 1010.2 based 
on the occupant load, except as modified in 
780 CMR 1010.3. 

Exception: In buildings with occupancies in Use 
Group R having multistory dwelling units, the 
means of egress from a dwelling unit to the 
required exits is permitted to be provided from 
one level only. Within the dwelling unit access to 
the means of egress from the unit shall conform to 
the applicable provisions of 780 CMR 10. 

Table 1010.2 

MINIMUM NUMBER OF EXITS FOR 

OCCUPANT LOAD 



Occupant load 


Minimum number of exits 


500 or less 

501 -1,000 
over 1 ,000 


2 
3 
4 



1010.3 Buildings with one exit; Only one exit shall 

be required in: 

1 . Occupancies in the use groups shown in Table 
1010.3, provided that the building has not more 
than one level below the level of exit discharge. 



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177 



Table 1010.3 
BUILDINGS WriU 0^fE EXIT 




Use Group 


Maximum 
height 
above 
grade 


Max. 
Size 


Max. 
Exit 
access 
travel 
distance 


Minimum fire- 

rcsistance 

rating of exit 

enclosure 


Min. Fire- 
resistance 
rating of 
opening 
protection 


B^ 
S-2* 


2 stories 


3,500 
sq.ft. 
per 
floor 


75 ft. 


1 hour 


1 hour 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

780 CMR 1011.0 EXrr ACCESS 
PASSAGEWAYS AND CORRIDORS 

1011.1 Access passageway: Direct exit access shall 
be provided to required exits through continuous 
passageways, aisle accessways, aisles or corridors 
which are conveniently available to all occupants 
and maintained free of obstruction. In every area 
containing seating, displays, exhibits, counters, 
shelving and other furnishings or fixtures, a path of 
travel that connects with each of the means of egress 
doorways serving the area and which complies with 
the minimum width requirements of aisles, shall be 
provided. 

1011.1.1 Use Groups 1-2 and 1-3: Every 
sleeping room in occupancies in Use Group 1-2 or 
1-3 shall have an exit access door leading directly 
to an exit access corridor. 

Exception: Direct corridor access is not 
required: 

1. Where there is an exit door opening directly 
to the outside from the room at ground level. 

2. In occupancies in Use Group 1-2, where one 
adjacent room, such as a sitting room or 
anteroom, intervenes and all doors along the 
means of egress are equipped with nonlockable 
hardware in accordance with 780 CMR 
409.3.2, and the intervening room is not used 
as an exit access for more than eight patients. 

3. In occupancies in Use Group 1-2, where a 
patient sleeping room is subdivided with 
nonfireresistance rated, noncombustible 
partitions, provided that the arrangement 
allows for direct and constant visual 
supervision by nursing personnel and the suite 
compQes with 780 CMR 1 1 1 . 1 and 780 CMR 
1017.0. Such rooms which are so subdivided 
shall not exceed 5,000 square feet (465 m"). 

4. In occupancies in Use Group 1-3, where a 
dayroom or group activity space intervenes 
between an in dividual occupant sleeping room 
and the access to an exit, provided that the 
sleeping room opens directly to the day space 
and is not separated in elevation by more than 
one story. 

1011.1.2 Turnstiles and gates: Access through 
turnstiles, gates, rails or similar devices shall not 
be permitted unless such a device is equipped to 
swing readily in the direction of exit travel under 
a total force of not more than 15 pounds (73.23 
N). 

1011.1.3 Restrictions: The required width of 
passageways, aisle accessways, aisles and 
corridors shall be maintained free of projections 
and restrictions; except that the minimum clear 
width resulting from doors opening into such 
spaces shall be one-half of the required width. 
When fijlly open, the door shall not project more 
than seven inches (178 mm) into the required 



Note a. For the required number of exits for open 
parking structures, see 780 CMR 1010.5. 

Note b. For the required number of exits for air traffic 
control towers, see 780 CMR 414.0. 

Note c. 1 foot = 304.8 mm. 

1010.4 Emergency escape: Every sleeping room 
below the fourth story in occupancies in Use Groups 
R and I-l shall have at least one operable window or 
exterior door approved for emergency egress or 
rescue. The units shall be operable from the inside 
without the use of special knowledge, separate tools 
or force greater than that which is required for 
normal operation of the window. Where windows 
are provided as a means of egress or rescue, the 
windows shall have the bottom of the clear opening 
not more than 44 inches (1118 mm) above the floor. 
All egress or rescue windows from sleeping rooms 
shall have a minimum net clear opening of 5.7 
square feet (0.53 m^). The minimum net clear 
opening height dimension shall be 24 inches (610 
mm). The minimum net clear opening width 
dimension shall be 20 inches (508 mm). 

Bars, grilles or screens placed over emergency 
escape windows shall be releasable or removable 
from the inside without the use of a key, tool or 
force greater than that which is required for normal 
operation of the window. 

Exceptions: 

1. The minimum net clear opening for grade floor 
windows shall be five square feet (0.47 m^. 

2. An outside window or an exterior door for 
emergency escape is not required in buildings 
where the sleeping room is provided with a door 
to a corridor having access to two remote exits in 
opposite directions. 

3. An outside window or an exterior door for 
emergency escape is not required in buildings 
equipped throughout with an automatic sprinkler 
system in accordance with 780 CMR 906.2.1 or 
906 2.2 

1010.5 Open parking structures: Parking 
structures shall not have less than two exits from 
each parking tier, except that only one exit is 
required where vehicles are mechanically parked. 
Unenclosed vehicle ramps shall not be considered as 
required exits unless pedestrian facilities are 
provided. Interior exit stairways are not required to 
be enclosed. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

MEANS OF EGRESS 



width. Handrail projections are permitted in 
accordance with 780 CMR 1022.2. 1 . 

101L2 Dead ends: exit access passageways and 
corridors in all stories which serve more than one 
exit shall provide direct connection to such exits in 
opposite directions from any point in the 
passageway or corridor insofar as practicable. The 
length of a dead-end passageway or corridor shall 
not be more than 20 feet (6096 mm). 
Exceptions: 

1 . In occupancies in Use Group 1-3 of Occupancy 
Conditions H, ffl or IV (see 780 CMR 308.4), the 
dead end in a corridor, hallway or aisle shall not 
exceed 50 feet (15240 mm). 

2. In occupancies in Use Group B where 
passageways are bounded by furniture, counters, 
partitions or similar dividers not more than six 
feet (1829 mm) in height, the length of a dead-end 
passageway shall not be more than 50 feet (15240 
mm). 

3. Passageways or corridors within spaces with 
one means of egress. 

4. A dead-end passageway or corridor shall not 
be limited in length where the length of the dead- 
end passageway or corridor is less than 2.5 times 
the least width of the dead-end passageway or 
corridor. 

1011.2.1 Common path of travel: In 

occupancies in Use Group B, the length of a 
common path of travel shall not exceed 75 feet 
(22860 nun). 
Exceptions: 

1. The length ofa com/now /TO?/? o/frave/ in an 
occupancy in Use Group B shall not be more 
than 100 feet (30480 mm), provided that the 
building is equipped throughout with an 
automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1. 

2. Where a tenant space in an occupancy in 
Use Group B has an occupant load of not more 
than 30, the length of a common path of travel 
shall not be more than 100 feet (30480 mm). 

1011.3 Width: The minimum required width of 
passageways, aisle accessways, aisles and corridors 
shall be determined by the most restrictive of the 
following criteria: 

1. 44 inches (1118 mm) where serving an 
occupant load of greater than 50. 

2. 36 mches (914 mm) where serving an occupant 
load of 50 or less. 

3. 96 inches (2438 mm) in an occupancy in Use 
Group 1-2 used for the movement of beds. 

4. 72 inches (1829 mm) in an occupancy in Use 
Group E with more than 100 occupants. 

5. The width required for capacity as determined 
by 780 CMR 1009.0. 

Aisles and aisle accessways shall conform to the 
requirements of 780 CMR 1011.0 or 780 CMR 
1012.0. 



1011.3.1 Capacity: The required capacity of a 
corridor shall be determined by dividing the 
occupant load that utilizes the corridor for exit 
access by the number of exits to which the 
corridor connects, but not less than the capacity 
of the exit element to which the corridor leads. 

1011.4 Enclosure: All corridors shall be 
fireresistance rated in accordance with Table 1011 .4 
based on the use group of the space and the total 
required capacity of all of the exits from the 
corridor. The corridor walls shall comply with 
780 CMR 71 1.0. 
Exceptions: 

1 A fireresistance rating is not required for 
corridors in an occupancy in Use Group E where 
each room that is occupied for instruction or 
assembly purposes has at least one-half of the 
required means of egress doors opening directly 
to the exterior of the building at ground level. 
2. A fireresistance rating is not required for 
corridors contained within a dwelling unit or a 
guestroom in an occupancy in Use Group R. 

Table 1011.4 
CORRTOOR FIRERESISTANCE RATING 





Total required 

capacity of all 

exits from 

corridor 


Required fireresistance rating 
(hours) 


Use Group 


Without 
sprinkler 
system 


With spni^er 
system 


H-l,H-2,H-3 
H-4 

A.B,E,F,M, 
S 

!-2 
1-3 


All 
>30 
>30 

>50 
All 
All 


1 
1 
1 

1 

1 

Not permitted 


1 
I 


H 



Note a. For a reduction in the fireresistance rating for 
occupancies in Use Group R, see 780 CMR 1011.4, 
Exception 2. 

Note b. For requirements for occupancies in Use 
Group 1-2, see 780 CMR 409.3. 

Note c. For a reduction in the fireresistance rating for 
occupancies in Use Group 1-3, see 780 CMR 410.7. 

Note d. buildings equipped throughout with an 
automatic sprinkler system in accordance with 780 CMR 
906.2. 1 or 906.2.2. 

1011.4.1 Corridor walls as separation walls: 

Tenant and dwelling unit separation walls which 
are also corridor walls shall comply with 
780 CMR 101 1.0 and the requirements of Table 
602. 

Exception: Tenant separation and dwelling 
unit separation walls which are also corridor 
walls shall not be required to have a 
fireresistance rating greater than that required 
by Table 1011.4 where the building is 
equipped throughout with an automatic 
sprinkler system in accordance with 780 CMR 
906.2.1 or 906.2.2. 



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179 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



1011.4.2 Opening protectives: All door 
assemblies from rooms opening onto a corridor 
that is required to be of fireresistance rated 
construction shall be fire doors complying with 
780 CMR 716.0 

1011.5 Exterior balconies: Exterior exit access 
balconies shall conform to the requirements of 
780 CMR 1011.0 for corridors and shall be 
protected to prevent the accumulation of snow and 
ice in climates subject to those elements. 

1011.5.1 Wall separation: Exterior exit access 
balconies shall be separated from the interior of 
the building by walls and opening protectives as 
required by 780 CMR 1011.4. A fireresistance 
rating for the wall is not required where the 
balcony is provided with not less than two 
approved stairways or other approved means of 
egress elements and a dead end does not require 
travel past an unprotected opening for access to 
the stairway or means of egress element. 

780 CMR 10110 ASSEMBLY AISLES 
AND AISLE ACCESSWAYS 

1012.1 Where required: In occupancies in Use 
Group A which contain seats, tables, displays, 
equipment or other material shall be provided with 
aisle accessways and aisles in accordance with 
780 CMR1012.0. These provisions shall also apply 
to tiered or stepped seating facilities except as 
modified by 780 CMR 1013.0. 

1012.2 Aisle and aisle accessway width: The width 
of aisle accessways and aisles shall provide 
sufiBdent means of egress capacity for the number of 
persons accommodated by the catchment area served 
by the aisle accessway or msle (see 780 CMR 
1012.2.5). The catchment area served by an aisle 
accessway or aisle is the portion of the total space 
which is naturally served by that section of the aisle 
accessway or aisle. In establishing catchment areas 
the assumption shall be made that there is a balanced 
use of all means of egress, with the number of 
persons in proportion to means of egress capacity. 

1012.2.1 Measurement of required minimum 
width of aisles and aisle accessways: Where 
seating is located at a table or counter and is 
adjacent to an aisle or aisle accessway, the 
measurement of required clear width of the aisle 
or aisle accessway shall be made to a line 19 
inches (483 mm) away from the edge of the table 
or counter. The 19-mch (483 mm) distance shall 
be measured perpendicular to the side of the table 
or counter. In the case of other side boundaries 
for aisles or aisle accessways the clear width shall 
be measured to walls, edges of seating and tread 
edges, except that handrail projections are 
permitted. 



1012.2.2 Converging aisles and aisle 
accessways: Where aisle accessways or aisles 
converge to form a single path of means of egress 
travel, the required means of egress capacity of 
such path shall not be less than the combined 
required capacity of the converging aisle 
accessways or aisles. 

1012.2.3 Uniform width of aisles: Those 
portions of aisles where means of egress is 
possible in either of two directions shall be 
uniform in required width. 

1012.2.4 Uniform width of aisle accessways: 

Those portions of aisle accessways having a 
required width exceeding 12 inches (305 mm), 
where means of egress is possible in more than 
one direction, shall be uniform in required width. 

1012.2.5 Capacity of aisles and aisle 
accessways: The width of aisles and aisle 
accessways shall provide sufficient capacity in 
accordance with the following criteria where clear 
width is measured in accordance with 780 CMR 
1012.2.1. 

1. At least 0.3 inch (7.5 mm) of width for each 
person served shall be provided on stairs 
having riser heights of seven inches (178 mm) 
or less and tread depths of 1 1 inches (279 mm) 
or greater, measured horizontally between 
tread nosings. 

2. At least 005 inch (0.1 mm) of additional 
stair width for each person shall be provided 
for each 0.10 inch (2.5 mm) of riser height 
above seven inches (178 mm). 

3. Where a means of egress requires stair 
descent, at least 075 inch (2 mm) of 
additional width for each person shall be 
provided on those portions of stair width not 
having handrails within a horizontal distance of 
30 inches (762 mm). 

4. Level or ramped means of egress with 
slopes less than one unit vertical in eight units 
horizontal (1:8), shall have at least 0.2 inch (5 
mm) of clear width for each person served. 

1012.2.6 Minimum width of aisles: The 

minimum clear width of aisles shall be: 48 inches 
(1219 mm) for stairs having seating on each side; 
36 inches (914 mm) for stairs having seating on 
only one side; 23 inches (584 mm) between a stair 
handrail or guardrail and seating where the aisle 
is subdivided by a handrail (see 780 CMR 
1012.5); 42 inches (1067 mm) for level or ramped 
aisles having theater-style seating on both sides; 
36 inches (914 mm) for all other level or ramped 
aisles; and 23 inches (584 mm) between a stair 
handrail and seating where an aisle does not serve 
more than five rows on one side. 

1012.2.7 Minimum width of aisle accessways: 

Aisle accessways shall conform to the 
requirements of 780 CMR 1012.6 in the case of 
theater-type seating and to the requirements of 



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MEANS OF EGRESS 



780 CMR 1012.7 in the case of all seating at 
tables or counters. 

1012.3 Termination: Each end of a cross aisle shall 
terminate at an aisle, foyer, doorway or vomitory 
giving access to an exit. Dead-end aisles which 
terminate only at one end with a cross aisle, foyer, 
doorway or vomitory giving access to an exit shall 
not be greater than 20 feet (6096 mm) in length. 

Exception: A longer dead-end aisle is permitted 
where seats served by the dead-end aisle are not 
more than 24 seats from another aisle, measured 
along a row of seats having a minimum clear 
width of 12 inches (305 mm) plus 0.6 inch (15 
mm) for each additional seat above seven in the 
row. 

1012.4 Walking surfaces: Aisles with a gradient of 
one unit vertical in eight units horizontal (1:8) or 
less shall consist of a ramp having a slip-resistant 
walking surface. Aisles with a gradient exceeding 
one unit vertical in eight units horizontal (1:8) shall 
consist of a series of risers and treads which extend 
across the full width of aisles and comply with 
780CMRS 1012.4.1 and 1012.4.2. 

1012.4.1 Treads: Tread depths shall be a 
minimum of 1 1 inches (279 mm) and be uniform 
within each aisle. 

Exception: Nonuniformities shall not exceed 
3/16 inch (5 mm) between adjacent treads. 

1012.4.2 Risers: Where the gradient of aisle 
stairs is to be the same as the gradient of adjoining 
seating areas, the riser height shall not be less 
than 4 inches (102 mm) nor more than eight 
inches (203 mm) and shall be uniform within each 
flight. 

Exception: Riser height nonuniformity shall 
be limited to the extent necessitated by changes 
in the gradient of the adjoining seating area to 
maintain adequate sightlines. Where 

nonuniformities exceed 3/16 inch (5 mm) 
between adjacent risers, the exact location of 
such nonuniformities shall be indicated with a 
distinctive marking stripe on each tread at the 
nosing or leading edge adjacent to the non- 
uniform risers. Such stripe shall be a minimum 
of one inch (25 mm) wide and a maximum of 
two inches (5 1 mm) wide. 

1012.5 Handrails: Ramped aisles having a gradient 
exceeding one unit vertical in 15 units horizontal 
(1:15) and aisle stairs shall be provided with 
handrails located either at the side or within the aisle 
width. 

Exceptions: 

1. Handrails are not required if, at the side of the 
aisle, there is a guardrail that complies with the 
requirements for handrails. 

2. Handrails are not required for aisles with 
seating on both sides unless there is more than 



one riser per row of seating. The single riser shall 
be indicated by a distinctive marking stripe on the 
leading edge of the tread. 

1012.5.1 Discontinuous rails: Where there is 
seating on both sides of the aisle, the handrails 
shall be discontinuous with gaps or breaks at 
intervals not exceeding five rows to facilitate 
access to seating and to permit crossing from one 
side of the aisle to the other. These gaps or breaks 
shall have a clear width of at least 22 inches (559 
mm) and not greater than 36 inches (914 mm), 
measured horizontally, and the handrail shall have 
rounded terminations or bends. 

1012.5.2 Intermediate rails: Where handrails 
are provided in the middle of aisle stairs, there 
shall be an additional intermediate handrail 
located approximately 12 inches (305 mm) below 
the main handrail. 

1012.6 Row width: The minimum clear row width 
shall not be less than 12 inches (305 mm) measured 
as the clear horizontal distance from the back of the 
row ahead and the nearest projection of the row 
behind. Where chairs have automatic or self-rising 
seats, the measurement shall be made with the seats 
in the raised position. Where any chair in the row 
does not have an automatic or self-rising seat, the 
measurement shall be made with the seat in the 
down position. Where tablet-arm chair seating is 
used, the measurement shall be made with the tablet- 
arm in the usable position. 

1012.6.1 Dual access: For rows of seating served 
by aisles or doorways at both ends, there shall not 
be more than 100 seats per row. The minimum 
clear width of 12 inches (305 mm) between rows 
shall be increased by 0.3 inch (7.5 mm) for every 
additional seat beyond 14 seats, but the minimum 
clear width is not required to exceed 22 inches 
(559 mm). 

1012.6.2 Single access: For rows of seating 
served by an aisle or doorway at only one end of 
the row, the minimum clear width of 12 inches 
(305 mm) between rows shall be increased by 0.6 
inch (15 mm) for every additional seat beyond 
seven seats, but the minimum clear width is not 
required to exceed 22 inches (559 mm). 
However, the path of travel shall not exceed 30 
feet (9144 mm) from any seat to a point where a 
person has a choice of two paths of travel to two 
exUs. 

1012.7 Aisle accessways for tables and seating: 

Aisle accessways serving arrangements of seating at 
tables or counters, shall have sufficient clear width 
to conform to the capacity requirements of 780 CMR 
1012.2.5, but shall not have less than the appropriate 
minimum clear width specified in 780 CMR 
1012.7.1. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



1012.7.1 Width: In addition to the width required 
by 780 CMR 1012 2, aisle accessways shall 
provide a minimum of 12 inches (305 mm) plus 
0.5 inch (13 mm) of width for each additional 1 
foot (305 mm), or fraction thereof, beyond 12 feet 
(3660 mm) of aisle accessway length measured 
from the center of the seat farthest from an aisle. 

Exception: Portions of an aisle accessway 
having a length not exceeding six feet (1830 
mm) and used by a total of not more than four 
persons. 

1012.7.2 Length: The length of travel along the 
aisle accessway shall not exceed 36 feet (10973 
mm) from any seat to the closest aisle. The path 
of travel shall not exceed 30 feet (9144 mm) from 
any seat to the point where a person has a choice 
of two or more paths of travel to separate exits. 

1012.8 Railings: Railings shall be provided on 
balconies and galleries in accordance with 780 CMR 
1021.4. 

780 CMR 1013.0 GRANDSTANDS 

1013.1 Scope: 780 CMR 1013.0 shall apply to all 
structures with an occupancy in Use Group A which 
provide permanent, temporary or portable tiered or 
stepped seating facilities, such as grandstands, 
bleachers, folding and telescopic seating. Except as 
modified by 780 CMR 1013.0, 780 CMR 1012.0 
shall apply to all such structures. 

1013.2 Smoke-protected assembly seating: 
Assembly seating which is served by a means of 
egress that is not subject to blocking by smoke 
accumulation within or under a structure shall be 
considered smoke protected and shall comply with 
the requirements of 780 CMR 1013.2.1 through 
1013.2.3. 

1013.2.1 Roof height: A smoke-protected 
assembly seating area with a roof shall have the 
lowest portion of the roof not less than 1 5 feet 
(4572 mm) above the highest aisle or aisle 
accessway. 

1013.2.2 Automatic sprinklers: All areas 
enclosed with walls and ceilings in structures 
containing smoke-protected assembly seating 
shall be equipped throughout with an automatic 
sprinkler system in accordance with 780 CMR 
906.0. 

Exception: An automatic sprinkler system is 
not required for either of the following: 

1. The floor area used for a contest, 
performance or entertainment provided that the 
roof construction is more than 50 feet (15240 
mm) above the floor level and the use of the 
floor is restricted to low fire-hazard 
occupancies. 

2. Press boxes and storage facilities less than 
1,000 square feet (9.3 m") in area in 
conjunction with outdoor seating facilities 



where all means of egress in the seating area 
are essentially open to the outside. 

1013.2.3 Smoke control: All means of egress 
serving a smoke-protected assembly seating area 
shall be provided with a smoke control system 
complying with 780 CMR 921.0 or natural 
ventilation designed to maintain the smoke level 
at least six feet (1829 mm) above the floor of the 
means of egress. 

1013.3 Travel distance: The exit access travel 
distance shall comply with 780 CMR 1006.5 except 
that in a smoke-protected assembly seating area, the 
travel distance from each seat to the nearest entrance 
to an egress vomitory portal or egress concourse 
shall not exceed 200 feet (60960 mm). The travel 
distance from the entrance to a vomitory portal or 
egress concourse to an approved egress stair, ramp 
or walk at the building exterior shall not exceed 200 
feet (60960 mm). Where aisles are required, the 
distance shall be measured along the aisles and aisle 
accessways without travel over or on the seats. 

1013.4 Minimum egress widths: The minimum 
clear width of stairways, passageways, doorways, 
ramps and other means of egress shall provide 
sufficient capacity in accordance with the provisions 
of 780 CMR 10, except as modified by Table 
1013.4. 

Table 1013.4 

MINIMUM EGRESS WIDTHS 

SMOKE-PROTECTED ASSEMBLY 

SEATING 





Inches 


of clear width per seat served 








Aisles. 




Number of 

seats in the 

space 


Stairs 

with 
handrails 
within 30 

inches 


Stairs 
without 
handrails 
within 30 

inches 


accessways. 
doorways 
and ramps 
not steeper 
than 1 in 10 
slope 


Ramps 
steeper 
.than 1 in 
10 slope 


2,000 or less 


0.300 


0.375 


0,200 


0,220 


5,000 


0.200 


0.250 


0.150 


0,165 


10,000 


0.130 


0.163 


0.100 


0.110 


15.000 


0,096 


0,120 


0,070 


0.077 


20.000 


0.076 


0.095 


0,056 


0.066 


25,000 or more 


0.060 


0.075 


0,044 


0,048 



Note a. If risers exceed 7 inches in height, the 
minimum clear width of stairs determined from the table 
shall be multiplied by factor A where A = 1 + [(Riser 
Height - 7,0) - 5], 

Note b, 1 inch = 25,4 mm, 

1013.5 Aisles: Aisles shall be provided in all 
seating facilities except that an aisle is not required 
where all of the following conditions exist, 

1 , Seats are without backrests, 

2. The rise from row to row does not exceed six 
inches (152 mm) per row. 



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3. The row spacing does not exceed 28 inches 
(711 mm) unless the seatboards and footboards 
are at the same elevation. 

4. The number of rows does not exceed 16 in 
height. 

5. The first seatboard is not more than 12 inches 
(305 mm) above the ground, floor surface or cross 
aisle below. 

6. Seatboards have a continuous flat surface. 

7. Seatboards provide a walking surface with a 
minimum width of 1 1 inches (279 mm). 

8. Egress from seating is not restricted by rails, 
guards or other obstructions. 

1013.5.1 Termination: Where seats are without 
backrests, dead ends in vertical aisles shall not 
exceed a distance of 16 rows. For smoke- 
protected assembly seating, the dead ends in 
vertical aisles shall not exceed a distance of 2 1 
rows. For smoke-protected assembly seating, a 
longer dead-end aisle is permitted where seats 
served by the dead-end aisle are not more than 40 
seats from another aisle, measured along a row of 
seats having an aisle accessway with a minimum 
clear width of 12 inches (305 mm) plus 0.3 inch 
(8 mm) for each additional seat above seven in the 
row. 

1013.5.2 Row width: For smoke protected 
assembly seating, the maximum number of seats 
in a row that has a minimum clear aisle accessway 
width of 12 inches (305 mm) shall be as specified 
in Table 1013.5.2. 

Where the number of seats per row exceeds 
that specified in Table 1013.5.2, the minimum 
clear aisle accessway width for rows served by 
aisles or doorways at both ends shall be 12 inches 
(305 mm) plus 0.3 inch (7.5 mm) for every 
additional seat beyond that specified in Table 
1013.5.2 and there shall be not more than 100 
seats per row; and for rows served by an aisle or 
doorway at only one end of the row, the minimum 
clear aisle accessway width shall be 12 inches 
(305 mm) plus 0.6 inch (15 mm) for every 
additional seat beyond that specified in Table 
1013.5.2. 

Table 1013.5.2 
ROW LENGTH WITH 12-INCH AISLE 
ACCESSWAY SMOKE-PROTECTED 
ASSEMBLY SEATING 



Total number of 
seats in the 


No. Of seats per row permitted to have a 

mmimum 1 2-inch clear width aisle 

accessway 


space 


Aisle or doorway at 
both ends of row 


Aisle or doorway at 
one end of row 


Less than 4,000 
4,000 
7,000 
10,000 
13,000 
16,000 
19,000 


14 
15 
16 
17 
18 
19 
20 
21 


7 
7 
8 
8 
9 
9 
10 



Note a. 1 inch = 25.4 mm. 

1013.5.3 Single access row: For rows of seating 
served by an aisle or doorway at only one end of 
the row in smoke-protected assembly seating, the 
common path of travel from any seat to a point 
where a person has a choice of two directions of 
egress travel shall not exceed 50 feet (15240 mm). 

1013.6 Bleacher footboards: Bleacher footboards 
shall be provided for all rows of seats above the 
third row or beginning at such a point where the 
seatboard is more than two feet (610 mm) above the 
ground, floor surface or cross aisle below. A 
separate footboard is not required where the same 
platform is used for both seating and the footboard, 
provided that each level or platform is not less than 
24 inches (610 mm) wide. On a horizontally 
projected plane, horizontal gaps between footboards 
and seatboards shall not exceed V4 inch (6 mm). 
Openings between footboards and seatboards which 
are located more than 30 inches (762 mm) above the 
floor or grade below shall be provided with 
intermediate construction such that a sphere with a 
diameter of four inches (102 mm) cannot pass 
through the opening. 

1013.7 Spaces underneath seats: Spaces 
underneath grandstand seats shall be kept free of all 
combustible and flammable materials and shall not 
be occupied or used for other than exits; except that 
where enclosed in not less than one-hour 
fireresistance rated construction, the code official 
shall approve the use of such spaces for other 
purposes, provided that the safety of the public is not 
endangered. 

780 CMR 1014.0 STAIRWAYS 

1014.1 General: All stairways shall comply with 
the provisions of 780 CMR 1014.0. 780 CMR 
1014.11 shall be applicable only to interior 
stairways. 780 CMR 1014.12 shall be applicable 
only to exterior stairways. 

1014.1.1 Walking surface: The maximum slope 
of the walking surface of treads and landings shall 
be one unit vertical in 48 units horizontal (1 :48). 

1014.2 Egress capacity: The egress capacity of 
stairways and doors shall be computed in 
accordance with 780 CMR "^09.0. 

1014.3 Width: All means of egress stairways shall 
not be less than 44 inches (1118 mm) in width. 

Exceptions: 

1. Stairways serving buildings of single-exit 
constrxiction where permitted by 780 CMR 1010.3 
shall not be less than 36 inches (914 mm) in 
width. 

2. Spiral stairways as provided for in 780 CMR 
1014.6.4. 



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3. Stairways serving an occupancy in Use Group 
R-3 shall not be less than 36 inches (914 mm) in 
width. 

4. Stairways serving and contained within a 
single residential dwelling unit shall not be less 
than 36 inches (914 mm) in width. 

5. Stairways serving buildings having a total 
occupant load of 50 or less shall not be less than 
36 inches (914 mm) in width. 

6. Where a stairway Uft is installed on stairways 
serving occupancies in Use Group R-3 or within 
dwelling units in occupancies in Use Group R-2, 
a clear passage width not less than 20 inches (508 
mm) shall be provided. 

1014.3.1 Restrictions: Means of egress stairways 
shall not reduce in width in the direction of egress 
travel. Projections into a required stairway width 
are prohibited, except at and below handrail 
height where, at each handrail, the projections 
shall not exceed 3'/2 inches (89 mm) into the 
required width. 

1014.3.2 Landing width: The least dimension of 
landings and platforms in means of egress 
stairways shall not be less than the required width 
of the stairway, except that the landing dimension 
in the direction of egress travel is not required to 
exceed four feet (1219 mm) where the travel from 
one stair flight to the next stair flight is a straight 
run. 

1014.4 Headroom: The minimum headroom in all 
parts of a stairway shall not be less than 80 inches 
(2032 mm) measured vertically from the tread 
nosing or from the floor surface of the landing or 
platform. 

1014.5 Vertical rise: A means of egress stairway 
shall not have a height of vertical rise of more than 
12 feet (3658 mm) between landings and 
intermediate platforms. 

1014.6 Treads and risers: Maximum riser height 
shall be seven inches (178 mm) and minimum riser 
height shall be four inches (102 mm). Minimum 
tread depth shall be 1 1 inches (279 mm), measured 
horizontally between the vertical planes of the 
foremost projection of adjacent treads and at a right 
angle to the tread's leading edge. 

Exceptions: 

1. Winders in accordance with 780 CMR 
1014.6.3. 

2. Spiral stairways in accordance with 780 CMR 
1014.6.4. 

3. Circular stairways in accordance with 
780 CMR 1014.6.5. 

4. Alternating tread stairways in accordance with 
780 CMR 1014.6.6. 

5. Stairways serving as aisles in assembly seating 
areas where the stairway pitch or slope is set, for 



sightline reasons, by the slope of the adjacent 
seating area. 

6. Any stairway replacing an existing stairway 
within a space where, because of existing 
construction, the pitch or slope cannot be reduced. 

7. Existing stairways. 

8. In occupancies in Use Group R-3 and within 
dwelling units in occupancies in Use Group R-2, 
the maximum riser height shall be 8% inches (210 
mm) and the minimum tread depth shall be nine 
inches (229 mm). A one-inch (25 mm) nosing 
shall be provided on stairways with solid risers. 

9. Stairways in penal facilities serving guard 
towers, observation stations and control rooms not 
more than 250 square feet (23 m^ ) in area shall be 
permitted to have risers not exceeding eight 
inches (203 mm) in height and treads not less than 
nine inches (229 mm) in depth. 

1014.6.1 Profile: The radius of curvature at the 
leading edge of the tread shall not be greater than 
Vi inch (13 mm). Bevelling of nosings shall not 
exceed '/i inch (13 mm). Risers shall be solid and 
vertical or sloped from the underside of the 
leading edge of the tread above at an angle not 
more than 30° (0.52 rad) from the vertical. The 
leading edge of tread shall not project more than 
1 '/2 inches (38 mm) beyond the tread below. 

Exception: Solid risers are not required for 
stairways serving dwelling units which are not 
required to be accessible or adaptable in 
accordance with 521 CMR, the Rules and 
Regulations of the Architectural Access 
Board, referenced in 780 CMR 11, and listed 
in Appendix A, provided that the opening 
between treads does not permit the passage of 
a sphere with a diameter of four inches (102 
mm). 

1014.6.2 Dimensional uniformity: There shall 
not be variation exceeding 3/16 inch (5 mm) in the 
depth of adjacent treads or in the height of 
adjacent risers. The tolerance between the largest 
and smallest riser or between the largest and 
smallest tread shall not exceed % inch (10 mm) in 
any flight of stairs. 

Exceptions: 

1. Where the bottom riser adjoins a sloping 
public way, walk or driveway which has an 
established grade and serves as a landing, a 
variation in the height of the bottom riser shall 
not exceed three inches (76 mm) in every three 
feet (914 mm) of .s-to/rwoy width. 

2. On stairways serving as aisles in assembly 
seating, where necessitated by changes in the 
gradient of adjoining seating areas to maintain 
adequate sightlines, the maximum 
nonuniformity of riser heights within a flight 
and the nonuniformity between adjacent risers 
shall not apply. Where a nonuniformity 
exceeds 3/16 inch (5 mm) between adjacent 
risers, the exact location of the nonuniformity 



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MEANS OF EGRESS 



shall be indicated with a distinctive marking 
stripe on each tread at the nosing or leading 
edge adjacent to the nonuniform risers. 

1014.6.3 Winders: Winders shall not be 
permitted in required means of egress stairways 
except in occupancies in Use Group R-3 and 
stairways serving a single dwelling unit. Such 
winders shall have a tread depth of not less than 
nine inches (229 mm) at a point not more than 12 
inches (305 mm) from the side where the tread is 
narrower and the minimum tread depth shall not 
be less than six inches (152 mm). 

1014.6.4 Spiral stairways: Spiral stairways shall 
not be used as an element of a means of egress 
except: in occupancies in Use Group R-3; within 
a single dwelling unit, from a mezzanine area not 
more than 250 square feet (23.25 nf) in area 
which serves not more than five occupants; and in 
penal facilities from a guard tower, observation 
station or control room not more than 250 square 
feet (23 m^ in area. The minimum width of all 
spiral stairways shall be 26 inches (660 mm) with 
each tread having a 7Vi-inch (191 mm) minimum 
tread depth at 12 inches (305' mm) from the 
narrow edge. AU treads shall be identicaland the 
rise shall not be more than 9'/2-inches (241 mm). 
A minimum headroom of six feet six inches (1981 
mm) shall be provided. 

1014.6.5 Circular stairways: Circular stairways 
shall have a minimum tread depth and a maximum 
riser height in accordance with 780 CMR 1014.6 
and the smaller radius shall not be less than twice 
the width of the stairway. The minimum tread 
depth measured 12 inches (305 mm) from the 
narrower end of the tread shall not be less than 1 1 
inches (279 mm). 

1014.6.6 Alternating tread stairways: 

Alternating tread stairways are permitted as an 
element of a means ofe^ess in buildings from a 
mezzanine area not more than 250 square feet (23 
m^ in area and which serves not more than five 
occupants; and in penal facilities, from a guard 
tower, observation station or control room not 
more than 250 square feet (23 m^ in area. 
Alternating tread stairways are also permitted for 
access to roofs as provided for in 780 CMR 
1027.0. 

1014.6.6.1 Handrails of alternating tread 
stairways: Handrails shall be provided on 
both sides of alternating tread stairways and 
shall conform to 780 CMR 1022.0. 

1014.6.6.2 Treads of alternating tread 
stairways.- Alternating tread stairways shall 
have a minimum projected tread of five inches 
(127 mm), a minimum tread depth of S'/z 
inches (216 mm), a minimum tread width of 
seven inches (178 mm) and a maximum riser 
to the next surface of the alternating tread of 



9'/2 inches (241 mm). The initial tread of the 
stairway shall be^ at the same elevation as 
the platform, landing or floor surface. 
Exception: Alternating tread stairways used 
as an element of a means of egress in 
buildings from a mezzanine area not more 
thm 250 square feet (23 m^ in area which 
serves not more than five occupants shall 
have a minimum projerted tread of 814 
inches (216 mm) with a minimum tread 
depth of 10'/4 inches (267 mm). The rise to 
the next alternating tread surface shall not be 
more than eight inches (203 mm). 

1014.7 Stairway guards and handrails: Stairways 
shall have continuous guards and handrails on both 
sides. Intermediate handrails are required so that all 
portions of the required width of stairs are within 30 
inches (762 mm) of a handrail. On monumental 
stairs, handrails shall be located along the most 
direct path of egress travel. Handrails shall be 
provided for alternating tread stairways in 
accordance with 780 CMR 1014.6.6. 1. Guards shall 
be constructed in accordance with 780 CMR 1021.0. 
Handrails shall be constructed in accordance with 
780 CMR 1022.0. 

Exceptions: 

1 . Stairways with fewer than three risers are not 
required to have handrails where serving a single 
dwelling unit or where such stairways are not in 
an exit access corridor or aisle, exit or exit 
discharge. 

2. Aisle stairs provided with a center handrail or 
serving seating on one side shall be equipped with 
a minimum of one handrail. 

3. Stairways within a dwelling unit shall be 
equipped with a minimum of one handrail. 

4. Spiral stairways shall be equipped with a 
minimum of one handrail. 

1014.8 Egress doors: Means of egress stairway 
doors shall provide an egress capacity of not less 
than the required capacity of the stairway which 
serves the floor or area from which the egress door 
leads. 

1014.8.1 Width: The minimum required width of 
every door to or from a means of egress stairway 
shall be determined by the most restrictive of the 
following criteria: 

1. 29y4-inch (756 mm) clear width within a 
dwelling unit that is not required to be 
accessible or adaptable. 

2. 36-inch (914 mm) minimum width of door 
leaf in an occupancy in Use Group 1-2. 

3. 32-inch (813 mm) clear width in all other 
cases. 

1014.8.2 Direction of swing: All means of egress 
doors shall swing on a landing in the direction of 
egress travel. When opening, egress doors shall 
not reduce the width of landings to less than one- 



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THE MASSACHUSETTS STATE BUILDING CODE 



halfofthe required width. When fully open, means 
of egress doors shall not project more than seven 
inches (178 mm) into the required width. 
Exception: Doors leading from a room or 
tenant space to a stairway in buildings in which 
only one exit is required are not required to 
swing in the direction of egress travel. 

1014.8.3 Door construction: All doorway 
opening protectives shall bejire doors complying 
with 780 CMR 716.0. Labeled means of egress 
fire doors shall have a maximum transmitted 
temperature end point of not more than 450°F 
(232 °C) above ambient at the end of 30 minutes 
of standard fire test exposure. 

1014.9 Stairway construction: All stairways shall 
be built of materials consistent with the types of 
materials permitted for the type of construction of 
the building; except that wood handrails shall be 
permitted for all types of construction. Such 
stairways shall have solid treads and landing 
platforms, and all finish floor surfaces shall be of 
slip-resistant materials. 

1014.9.1 Strength: All stairways, platforms and 
landings in other than occupancies in Use Group 
R-3 shall be adequate to support a live load of 100 
pounds per square foot (488.20 kg/m^) and a 
concentrated load of 300 pounds (136.20 kg). 

1014.10 Discharge identification: Exit stairways 
which continue beyond the level of exit discharge 
shall be interrupted at the level of exit discharge by 
partitions, doors or other effective means of 
preventing persons from continuing past the floor of 
discharge while egressing. 

1014.11 Interior stairway enclosures: Interior exit 
stairways shall be enclosed with fire separation 
assemblies having a fireresistance rating of not less 
than two hours except that such stairways in 
occupancies in Use Group A, B, E, F, H-4, 1, M, R 
or S which connect less than four stories shall be 
enclosed with^re separation assemblies having a 
fireresistance rating of not less than one hour. An 
exit stairway enclosure shall not be used for any 
purpose other than means of egress. Openings in 
exit enclosures, other than unexposed exterior 
openings, shall be limited to those necessary for exit 
access to the enclosure from normally occupied 
spaces and for egress from the enclosure. 

Exceptions: 

1 . Stairways are not required to be enclosed in 
occupancies in Use Group A-5 in which all 
portions of the means of egress are essentially 
open to the outside. 

2. Stairways serving and contained within a 
single residential dwelling unit in occupancies in 
Use Group R-2 or R-3 are not required to be 
enclosed. 



3. Stairways that are not a required means of 
egress element are not required to be enclosed 
where such stairways comply with 780 CMR 
713.3. 

4. Stairways in open parking structures which 
serve only the parking structure are not required 
to be encloed. 

5. Stairways in occupancies in Use Group 1-3 as 
provided for in 780 CMR 410.3.7. 

1014.11.1 Exterior walls: Exterior walls of an 
enclosed exit stairway shall comply with the 
requirements of 780 CMR 705.0 for exterior 
walls. Where nonrated walls or unprotected 
openings enclose the exterior of the stairway, the 
building exterior walls within ten feet (3048 mm) 
horizontally of the nonrated wall or unprotected 
opening shall be constructed as required for 
stairway enclosures, including opening 
protectives, but are not required to exceed a one- 
hour fireresistance rating with %-hour opening 
protectives. This construction shall extend 
vertically from a point ten feet (3048 mm) above 
the topmost landing of the stairway or to the roof 
line, whichever is lower, and down to the ground. 

1014.11.2 Penetrations: Penetrations into and 
openings through an exit enclosure assembly are 
prohibited except for required exit doors, 
ductwork and equipment necessary for 
independent stair pressurization, required 
ventilation sprinkler piping, standpipes and 
electrical conduit serving the stairway and 
terminating at a steel box that does not exceed 16 
square inches (10323 mm^) in area. There shall 
not be any penetrations or communicating 
openings, whether protected or not between 
adjacent stairway enclosures. 

1014.11.3 Door locks: All interior stairway 
means of egress doors shall be openable from 
both sides without the use of a key or special 
knowledge or effort. 

Exceptions: 

1 . Stairway discharge doors shall be operable 
from the egress side and shall only be locked 
from the opposite side. 

2. 780 CMR 1014.0 shall not apply to doors 
arranged in accordance with 780 CMR 403.10 
and 1017.4. 

1014.11.4 Exit signs: Each door to an enclosed 
exit stairway shall be equipped with tactile 
signage reading "Exit" complying with 521 CMR 
listed in Appendix A and installed on the side of 
the door from which egress is to be made. 

1014.11.5 Stairway floor number signs: A sign 
shall be provided at each floor landing in all inter- 
ior exit stairways connecting more than three stor- 
ies designating the floor level above and below 
the level of exit discharge, the identification of the 
stairway and the availability of roof access from 
that stairway. The sign shall be located 



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MEANS OF EGRESS 



approximately five feet (1524 mm) above the 
floor landing in a position which is readily visible 
when the doors are in the open and closed 
positions. 

1014.12 Exterior stairways: Exterior stairways 
shall have openings on at least one side facing an 
outer court, yard oi public way. The openings shall 
have an aggregate width of not less than 20% of the 
stairway perimeter and an aggregate area on each 
level of not less than 12% of the total perimeter wall 
area of each level. In other than occupancies in Use 
Group R-3, treads, platforms and landings which are 
part of exterior stairways in climates subject to snow 
or ice shall be protected to prevent accumulation of 
same. Exterior stairways shall not be accepted as an 
exit in the following cases: 

1. Occupancies in Use Groups 1-2 and 1-3 in 
buildings that exceed four stories or 50 feet 
(15240 mm) in MgA/. 

2. Floors that exceed five stories or 65 feet 
(19812 mm) in height above the level of exit 
discharge. 

1014.12.1 Location: Exterior exit stairways shall 
not project beyond the street lot line. Exterior 
exit stairways shall be located at least ten feet 
(3048 mm) firom adjacent lot lines and from other 
buildings on the same lot unless openings in such 
buildings are protected by 'X-hour opening 
protectives. 

Exception: Noncombustible exterior 

stairways constituting not more than 50% of 
the required means of egress shall be exempt 
from the ten-foot (3048 mm) fire separation 
distance requirement. 

1014.12.2 Protection: Exterior exit stairs shall be 
separated from the interior of the building by 
walls with a fireresistance rating of not less than 
one hour, with fixed or self-closing opening 
protectives as required in 780 CMR 1014.11. 
This protection shall extend vertically from a 
point ten feet (3048 mm) above the topmost 
landing or the roof line, wdiichever is lower, down 
to the ground, and shall extend horizontally ten 
feet (3048 mm) from each side of the stairway. 
Openings within the horizontal ten-foot (3048 
mm) extension of the protected walls beyond the 
stairway shall be equipped with fixed y4-hour 
opening protective assemblies. 

Exceptions: 

1 . Occupancies, other than those in Use Group 
R-1 or R-2, in buildings that are two stories or 
less above grade where the level of exit 
discharge is the first story above grade. 

2. Separation from the interior of the building 
is not required where the exterior stairway is 
served by an exterior exit access balcony that 
connects two remote exterior stairways or 
other approved exits, with a perimeter which is 
not less than 50% open. To be considered 



open, the opening shall be a minimum of 50% 
of the height of the enclosing wall, with the top 
of the openings not less than seven feet (2134 
mm) above the top of the balcony. 
3. Separation from the interior of the building 
is not required for an exterior stairway located 
in a building or structure that is permitted to 
have unenclosed interior exit stairways in 
accordance with 780 CMR 1014.1 1. 

780 CMR 1015.0 SMOKEPROOF 
ENCXOSURES 

1015.1 General: A smokeproof enclosure shall 
consist of an enclosed interior exit stairway that 
conforms to 780 CMR 1014.0 and an outside 
balcony or a ventilated vestibule meeting the 
requirements of 780 CMR 1015.0. Where access to 
the roof is required by 780 CMR 1027.0, such access 
shall be from the smokeproof enclosure where a 
smokeproof enclosure is required. 

1015.2 Where required: In buildings having a 
height of 70 feet above the grade plane, at least one 
exit stairwell shall be protected by a smokeproof 
enclosure serving all floor levels. In buildings 
having exit stairwells more than 30 feet below the 
level of exit discharge, at least one exit stairwell 
shall be protected by a smokeproof enclosure 
serving all floor levels located below the level of exit 
discharge. 

Exception: Occupancies in Use Group 1-2. 

1015.3 Access: Access to the stair shall be from 
every story and shall be by way of a vestibule or by 
way of an open exterior balcony. The minimum 
dimension of the vestibule shall not be less than the 
required width of the corridor leading to the 
vestibule but shall not have a width of less than 44 
inches (1118 mm) and shall not have a length of less 
than 72 inches (1829 mm) in the direction of egress 
travel. 

1015.4 Construction: The smokeproof enclosure 
shall be separated from the remainder of the building 
by not less than a two-hour fireresistance rated fire 
separation assembly without openings other than the 
required means of egress doors. The vestibule shall 
be separated from the stairway by not less than a 
two-hour fireresistance rated fire separation 
assembly. The open exterior balcony shall be 
constructed in accordance with the fireresistance 
rating requirements for floor construction. 

1015.4.1 Door closers: All doors in a smokeproof 
enclosure shall be self-closing or shall be 
automatic-closing by actuation of a smoke 
detector installed at the floor side entrance to the 
smokeproof enclosure in accordance with 
780 CMR 716.5. The actuation of the smoke 
detector on any door shall activate the closing 



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at all levels. Smoke detectors shall be installed in 
accordance with 780 CMR 918.8. 

1015.5 Natural ventilation alternative: The 

provisions of 780 CMR 1015.5.1 through 1015.5.3 
shall apply to ventilation of smokeproof enclosures 
by natural means. 

1015.5.1 Balcony doors: Where access to the 
stairway is by way of an open exterior balcony, 
the door assembly into the enclosure shall be a 
fire door in accordance with 780 CMR 716.0. 

1015.5.2 Vestibule doors: Where access to the 
stairway is by way of a vestibule, the door 
assembly into the vestibule shall be afire door 
complying with 780 CMR 716.0. The door 
assembly from the vestibule to the stairway shall 
have not less than a 20-minute fire protection 
rating complying with 780 CMR 716.0. 

1015.5.3 Vestibule ventilation: Each vestibule 
shall have a minimum net area of 16 square feet 
(1.49 m^) of opening in a wall facing an outer 
court, yard or public way which is at least 20 feet 
(6096 mm) in width. 

1015.6 Mechanical ventilation alternative: The 

provisions of 780 CMR 1015.6.1 through 1015.6.4 
shall apply to ventilation of smokeproof enclosures 
by mechanical means. 

1015.6.1 Vestibule doors: The door assembly 
from the building into the vestibule shall be afire 
door complying with 780 CMR 716.0. The door 
assembly from the vestibule to the stairway shall 
have not less than a 20-minute fire protection 
rating in accordance with 780 CMR 716.0. The 
door from the building into the vestibule shall be 
provided with gaskets or other provisions to 
minimize air leakage. 

1015.6.2 Vestibule ventilation: The vestibule 
shall be supplied with not less than one air change 
per minute, and the exhaust shall not be less than 
150% of supply. Supply air shall enter and 
exhaust air shall discharge from the vestibule 
through separate, tightly constructed ducts used 
only for that purpose. Supply air shall enter the 
vestibule within six inches (152 mm) of the floor 
level. The top of the exhaust register shall be 
located at the top of the smoke trap but not more 
than six inches (152 mm) down from the top of 
the trap, and shall be entirely within the smoke 
trap area. Doors in the open position shall not 
obstruct duct openings. Duct openings with 
controlling dampers are permitted where 
necessary to meet the design requirements, but 
dampers are not otherwise required. 

1015.6.2.1 Engineered ventilation system: 
Where a specially engineered system is used, 



the systems shall exhaust a quantity of air 
equal to not less than 90 air changes per hour 
from any vestibule in the emergency operation 
mode and shall be sized to handle three 
vestibules simultaneously. Smoke detectors 
shall be located at the floor side entrance to 
each vestibule and shall activate the system for 
the affected vestibule. Smoke detectors shall 
be installed in accordance with 780 CMR 
918.8. 

1015.6J Smoke trap: The vestibule ceiling shall 
be at least 20 inches (508 mm) higher than the 
door opening into the vestibule to serve as a 
smoke and heat trap and to provide an upward 
moving air column. The height shall not be 
decreased unless approved and jmtified by design 
and test. 

1015.6.4 Stair shaft air movement system: The 

stair shaft shall be provided with a dampered 
relief opening and supplied with sufficient air to 
maintain a minimum positive pressure of 0.10 
inch of water colunm (24.88 P) in the shaft 
relative to the vestibule with all doors closed. 

1015.7 Ventilating equipment: The activation of 
ventilating equipment required by the altematives in 
780 CMR 1015.6 shall be by smoke detectors 
installed at each floor level at an approved location 
at the entrance to the smokeproof enclosure. When 
the closing device for the stair shaft and vestibule 
doors is activated by smoke detection or power 
failure, the mechanical equipment shall activate and 
operate at the required performance levels. Smoke 
detectors shall be installed in accordance with 
780 CMR 91 8.8. 

1015.7.1 Ventilation systems: Smokeproof 
enclosure ventilation systems shall be 
independent of other building ventilation systems. 
The equipment and ductwork shall comply with 
one of the following: 

1. Equipment and ductwork shall be located 
exterior to the building and shall be directly 
connected to the smokeproof enclosure or 
connected to the smokeproof enclosure by 
ductwork enclosed by two-hour fireresistance 
rated fire separation assemblies. 

2. Equipment and ductwork shall be located 
within the smokeproof enclosure with intake or 
exhaust directly from and to the outside or 
through ductwork enclosed by two-hour 
fireresistance rated fire separation assemblies. 

3. Equipment and ductwork shall be located 
within the building if separated from the 
remainder of the building, including other 
mechanical equipment, by two-hour 
fireresistance rated fire separation assemblies. 



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12/12/97 (Effective 8/28/97) 



780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

MEANS OF EGRESS 

1015.7.2 Standby power: Mechanical vestibule 
and stair shaft ventilation systems and automatic 
fire detection systems shall be powered by an 
approved standby power system conforming to 
780 CMR 403.9.1 and 527 CMR 12.00, the 
Massachusetts Electrical Code, referenced in 
780 CMR 27, and listed in Appendix A. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

MEANS OF EGRESS 



1015.7.3 Acceptance and testing: Before the 
mechanical equipment is approved, the system 
shall be tested in the code official's presence to 
confirm that the system is operating in compliance 
with these requirements. 

780 CMR 1016.0 RAMPS 

1016.1 Capacity: The capacity of a ramp used as a 
means of egress component shall be computed in 
accordance with 780 CMR 1009.0. 

Note: For ramp design requirements related to 
building access issues, refer to 780 CMR 1 1 .00 

1016.2 Minimum dimensions: The minimum 
dimensions of means of egress ramps shall comply 
with 780 CMR 1016.2.1 through 1016.2.3. 

1016.2.1 Width: The minimum width of a means 
of egress ramp shall not be less than that required 
for corridors by 780 CMR 101 1.3. 

1016.2.2 Headroom: The minimum headroom in 
all parts of the means of egress ramp shall not be 
less than 80 inches (2032 mm). 

1016.23 Restrictions: Means of egress ramps 
shall not reduce in width in the direction of egress 
travel. Projections into the required ramp and 
landing width are prohibited except at and below 
handrail height where, at each handrail, the 
projections shall not exceed 3/4 inches (89 mm) 
into the required width. Doors opening onto a 
landing shall not reduce the clear width to less 
than 42 inches (1067 mm). 

10163 Maximum slope: The maximum slope of 
means of egress ramps in the direction of travel shall 
be one tmit vertical in 12 units horizontal (1:12); 
except the maximimi slope shall be: one imit 
vertical in eight units horizontal (1:8) if the rise is 
limited to three inches (76 mm); one unit vertical in 
ten imits horizontal (1:10) if the rise is limited to six 
inches (152 mm). The maximxmi slope across the 
direction of travel shall be one imit vertical in 48 
units horizontal (1:48). 

Exception: Aisles in areas of Use Group A shall 

comply with 780 CMR 1012.0. 

1016.4 Landings: Ramp slopes of one unit vertical 
in 12 units horizontal (1:12) or steeper shall have 
landings at the top, bottom, all points of turning, 
entrance, exit and at doors. Ramps shall not have a 
vertical rise greater than 30 inches (762 mm) 
between landings. The maximum slope of landings 
shall be one unit vertical in 48 units horizontal 
(1 :48). The least dimension of a landing shall not be 
less than the required width of the ramp except that 
the landing dimension in the direction of travel is not 
required to exceed four feet (1219 mm) where the 



travel from one ramp to the next ramp is a straight 
run. 

Exception: Aisles in areas of Use Group A shall 

comply with 780 CMR 1012.0. 

1016.5 Guards and handrails: Guards shall be 
provided on both sides of the ramp and shall be 
constructed in accordance with 780 CMR 1021.0. 
Handrails conforming to 780 CMR 1022.0 shall be 
provided on both sides of every ramp having a slope 
greater than one unit vertical in 20 imits horizontal 
(1 :20). Handrails are not required on ramps where 
the vertical rise between landings is six inches (152 
mm) or less. 

Exception: Handrails in aisles in occupancies in 
Use Group A shaU comply with 780 CMR 1012.0. 

1016.5.1 Drop-offs: The sides of ramps and 
landings with a drop-off shall have a curb with a 
minimimi four-inch (102 mm) height above the 
walking surface or shall be provided with a 
guardrail. 

1016.6 Ramp construction: Ramps used as an exit 
shall conform to the applicable requirements of 
780 CMR 1014.9 as to materials of construction and 
enclosure. 

1016.6.1 Surface: For all slopes exceeding one 
unit vertical in 20 units horizontal (1:20) and 
where the use is such as to involve danger of 
sUpping, the ramp shall be surfaced with approved 
slij)-resistant materials. 

1016.6.2 Exterior ramps: Exterior ramps and 
landings shall be designed and constructed to 
prevent water from accumulating on the walking 
surface. 

780 CMR 1017.0 MEANS OF EGRESS 
DOORWAYS 

1017.1 General: The requirements of 780 CMR 
1017.0 shall apply to all doorways serving as a 
component or element of a means of egress, except 
as provided for in 780 CMR 1014.8, 1014.12.2, 
1015.5.1.1015.5.2 and 1015.6.1. 

1017.1.1 Floor surface: The floor surface on 
both sides of a door shall be at the same elevation. 
The floor surface over which the door swings 
shall be at the same elevation as the floor level at 
the threshold and shall extend from the door in the 
closed position a distance equal to the door width. 

Exception: This requirement shall not apply 

to: 

1. Exterior doors, as provided for in 780 CMR 
1005.6, which are not on an accessible route. 

2. Variations in elevation due to differences in 
finish materials, but not more than Vi inch (13 
mm). 



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THE MASSACHUSETTS STATE BUILDING CODE 



Thresholds at doorways shall not exceed V* 
inch (19 mm) in height above the finished floor 
surface for exterior residential sliding doors or '/i 
inch (13 mm) for all other doors. Raised 
thresholds and floor level changes greater than Vi 
inch (6 mm) at doorways shall be beveled with a 
slope not greater than one unit vertical in two 
units horizontal (1;2). 

1017.2 Number of doorways; Each occupant of a 
room or space shall have access to at least two exits 
or exit access doors from the room or space where 
the occupant load of the space exceeds that listed in 
Table 1017.2, or where the travel distance from any 
point within the space to an exit or exit access door 
exceeds that listed in Table 1017.2. Where the 
occupant load of a room or space is between 501 and 
1,000, a minimum of three exits or exit access doors 
shall be provided. Where the occupant load of a 
room or space exceeds 1,000, a minimum of four 
exits or exit access doors shall be provided. 
Exceptions: 

1 . Boiler, incinerator and flimace rooms shall be 
provided with two egress doorways where the 
area exceeds 500 square feet (47 m^) and 
individual fiiel-fired equipment exceeds 400,000 
Btuh (117 kW) input capacity. Door ways shall 
be separated by a horizontal distance equal to not 
less than one-half of the diagonal dimension of 
the room. Where two doorways are required by 
this exception, a fixed ladder access out of the 
room shall be permitted in lieu of one doorway. 

2. In an occupancy in Use Group 1-2, any room 
and any suite of rooms as permitted in 780 CMR 
1011. 1.1, Exception No.3, of more than 1,000 
square feet (93 m^), shall have at least two exit 
access doors remote from each other. 

Table 1017.2 
SPACES WITH ONE MEANS OF EGRESS 



Use Group 


Maximum 
occupant load 


Maximum travel 
distance (feet) 


A, B, E. F. M 

H-l^H-2,H-3 

H-4 

S 


50 

3 

!0 
iO 
30 


75 
25 
75 
75 
100 



Note a. For requirements for areas and spaces in Use 
Group H-1, see 780 CMR 418.2.2. 
Noteb. 1 foot = 304.8 mm. 

1017.2.1 Entrance and egress doorways: Where 
separate doors are provided for entrance and 
means of egress, the entrance door shall be clearly 
marked "Entrance Only" in letters not less than 
sbc inches (152 mm) in height and legible from 
both inside and outside. 

1017.2.2 Location of doors: The required 
doorways opening from a room or space within a 
building and leading to an exit access shall be 
located as remote as practicable from each other 



and shall conform to 780 CMR 1006.4.1. The 
distance of exit access travel from any point in a 
room or space to a required exit door shall not 
exceed the limitations of 780 CMR 1006.5. 

1017.2.3 Door arrangement: The space between 
doors in series shall not be less than seven feet 
(2134 mm) as measured when the doors are in the 
closed position. 

Exception: Power-operated doors and 
occupancies in Use Giroups I-l and R-3. 

1017.3 Size of doors: The minimum width of each 
door opening shall be sufiBcient for the occupant 
load thereof and shall provide a clear width of not 
less than 32 inches (813 mm). Where 780 CMR 
1017.0 requires a minimum clear width of 32 inches 
(813 mm) and a door opening includes two door 
leaves without a mullion, one leaf shall provide a 
clear opening width of 32 inches (813 mm). The 
maximum width of a swinging door leaf shall be 48 
inches nominal. Means of egress doors in an 
occupancy in Use Group 1-2 used for the movement 
of beds shall be at least 44 inches (1118 mm) wide. 
The height of doors shall not be less than 80 inches 
(2032 mm). 

Exceptions: 

1. Pi. means of egress door serving a storage area 
of not more than 800 square feet (74 m^ and 
which is normally unoccupied shall have a 
maximum width often feet (3048 mm). 

2. The minimum and maximum width shall not 
apply to doors that are not required for means of 
egress in occupancies in Use Groups R-2 and R-3. 

3. Door openings to resident sleeping rooms in 
occupancies in Use Group 1-3 shall have a clear 
width of not less than 28 inches (711 mm). 

4. Door openings to storage closets less than ten 
square feet (0.93 m^) in area shall not be limited 
by the minimum width. 

5. Width of door leafs in revolving doors that 
comply with 780 CMR 1018.0 shall not be 
limited. 

6. Door openings within a dwelling unit shall not 
be less than 78 inches (1981 mm) in height. 

7. Exterior door openings in dwelling units, other 
than the required exit door, shall not be less than 
76 inches (1930 mm) in height. 

8. Interior egress doorways within a dwelling unit 
not required to be adaptable or accessible shall 
have a minimum clear width of 29%-inches (755 
mm). 

1017.4 Door hardware: Door handles, pulls, 
latches, locks and other operating devices shall be at 
a maximum height of 48 inches (1219 mm) above 
the finished floor. The operating devices shall be 
capable of operation with one hand and shall not 
require tight grasping, tight pinching or twisting of 
the wrist to operate. All means of egress doors shall 
be of a side-swinging type All doors shall swing in 
the direction of egress where serving an occupant 



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MEANS OF EGRESS 



load of 50 or more persons or where serving a high- 
hazard occupancy. The opening force for interior 
sideswinging doors without closers shall not exceed 
a five-pound (24 N) force. For all other side- 
swinging, sliding and folding doors, the door latch 
shall release when subjected to a 15-pound (73 N) 
force. The door shall be set in motion when 
subjected to a 30-pound (146 N) force. The door 
shall swing to a full-open position when subjected to 
a 1 5-pound (73 N) force. Forces shall be applied to 
the latch side. 
Exceptions: 

1 . Doors to private garages, factory and storage 
areas with an occupant load often or less. 

2. Horizontal sliding-type doors complying with 
780 CMR 4 10.4.2 shall be permitted in a means of 
egress in occupancies in Use Grroup 1-3 . 

3 . Doors within or serving a single dwelling unit 
which is not required to be accessible or adaptable 
by 780 CMR 1 1, are not required to be provided 
with lever handled operating devices. 

4. Revolving doors conforming to 780 CMR 
1018.0. 

5. Horizontal sliding doors complying with 
780 CMR 1017.4.4 shall be permitted in a means 
of egress in areas of refuge as described in 
780 CMR 1007.5 and areas, other than high- 
hazard occupancies, that serve an occupant load 
of less than 50. 

1017.4.1 Locks and latches: All means of egress 
doors shall be readily openable fi-om the side from 
which egress is to be made without the use of a 
key or special knowledge or effort. Refer to 
M.G.L c 143 § 3Rfor locking devices on the 
exterior doors of apartment houses. 
Exceptions 

1. Key operation shall be permitted fi-om a 
dwelling unit provided that the key cannot be 
removed fi-om the lock when the door is locked 
from the side from which egress is to be made. 

2. Locking devices conforming to 780 CMR 
409.3.2 shall be permitted in occupancies in 
Use Group 1-2. 

3. Locks conforming to 780 CMR 410.4 shall 
be permitted in occupancies in Use Group 1-3 . 

4. Means of egress doors from individual 
dwelling units and guestrooms of occupancies 
in Use Group R having an occupant load often 
or less shall be permitted to be equipped with 
a night latch, dead bolt or security chain, 
provided that such devices are openable from 
the inside without the use of a key or tool and 
are mounted at a height not to exceed 48 inches 
(1219 mm) above the finished floor. 

5. Special locking arrangements conforming 
to 780 CMR 1017.4.1.2 or 780 CMR 
1017.4.1.3. 

6. In occupancies in Use Groups B, F, M and 
S, the main exterior means of egress door is 
permitted to be equipped with a key-operated 
locking device from the egress side where in 



compliance with the following three 
conditions: 

6. 1. The locking device is of a type that is 
readUy distinguishable as locked. 

6.2. A readily visible, durable sign is posted 
on the egress side on or adjacent to the door 
stating "This Door To Remain Unlocked 
When This Building Is Occupied." The sign 
shall be in letters not less than one inch (25 
mm) high on a contrasting background. 

6.3. The main exterior door is a single door 
or a pair of doors which, when unlocked, the 
door or both leafs of a pair of doors swing 
free. 

7. Locking arrangements conforming to 
780 CMR 1017 4.5. 

8. In occupancies in Use Group I-l and 1-2 
locks shall be permitted under the following 
conditions: 

a. Patient sleeping room doors may be 
provided with key locking devices that 
restrict access to the room from the 
corridor and that are openable only by 
staff from the corridor side, provided such 
device shall not restrict egress from the 
sleeping room, 

b. All other means of egress doors may be 
provided with key locking devices where 
the clinical needs of the patients require 
specialized security measures for their 
safety, or for the protection of the public, 
provided keys are carried 24 hours per day 
by staffing at all times, who have been 
trained in emergency evacuation 
procedures. 

1017.4.1.1 Flush and surface bolts: Manually 
operated edge or surface-mounted flush bolts 
and surface bolts are prohibited. Where means 
of egress doors are used in pairs and approved 
automatic flush bolts are used, the door leafs 
having the automatic flush bolts shall not have 
a door knob or surface-mounted hardware. 
The unlatching of any leaf shall not require 
more than one operation. 

1017.4.1.2 Special locking arrangements: In 

buildings that are equipped throughout with an 
automatic sprinkler system installed in 
accordance with 780 CMR 906.2.1 or with an 
automatic fire detection system, doors in a 
means of egress serving occupancies in Use 
Group B, E, F, I, M, S or R, shall be unlocked 
or shall be equipped with approved egress 
control devices which shall unlock in 
accordance with items 780 CMR 1017.4 1.2.1 
through 7. A building occupant shall not be 
required to pass through more than one door 
equipped with a special locking device before 
entering an exit. 

1. Actuation of the automatic sprinkler 
system or automatic fire detection system. 



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2. Loss of power to the egress control 
device. 

3. Loss ofpower to the building. 

4. Capability of being unlocked manually 
by a signal from an emergency control 
station. 

5. The initiation of an irreversible and 
automatic process that will release the latch 
within 15 seconds when a force of not more 
than 15 pounds (73 N) is apphed for one 
second to the release device and not relock 
imtil the door has been opened and returned 
to the closed position for not less than 30 
seconds. Any reopening of the door shall 
restart the 30-second relocking cycle. Any 
attempt to exit which exceeds one second 
shall render the door openable. The time 
delay and the minimum relocking cycle time 
shall not be field adjustable. 

Exceptions: 

1. An increase in the time delay to 30 
seconds shall not be permitted except as 
approved by the code official. 

2. An increase in the relocking cycle 
time to 45 seconds shall not be permitted 
except as approved by the code official. 

3. In Use Group B buildings where one 
tenant occupies the entire floor and the 
building has a security station staffed 24 
hours each day, the installation of a 
door release device described in 
780 CMR 1017.4.1.2, item 5, may be 
omitted on egress doors in elevator 
lobbies provided that all other items in 
780 CMR 1017.4.1.2 are met, and in 
addition, the following items are met: 

a. The building is equipped 
throughout with both a supervised 
automatic fire sprinkler system and a 
supervised automatic fire alarm 
system. 

b. The supervised automatic fire 
sprinkler system and the supervised 
fire alarm system shall interface with 
the access control system to unlock the 
doors automatically upon activation of 
either system. 

c. The elevator lobby shall be 
equipped with a telephone connected 
directly to the staffed security station 
and a sign having block letters one 
inch in height shall be provided 
directly above the telephone and shall 
state: "In case of emergency, pick up 
telephone You will be connected 
directly to security personnel". 

6. Initiation of the irreversible process shall 
activate an audible alarm in the vicinity of 
the door. 

7. A sign having block letters of one inch 
(25 mm) in height shall be provided on the 



door above and within 12 inches (305 mm) 
of the release device stating "Push until 
alarm sounds. Door can be opened in 15 
seconds." 

1017.4.1.3 Security locking arrangements in 
penal facilities: In occupancies in Use Groups 
A-3, A-4, B, E, F, 1, M and S within penal 
facilities, doors in means of egress serving 
rooms or spaces occupied by persons whose 
movements must be controlled for security 
reasons shall be permitted to be locked if 
equipped with egress control devices which 
shall unlock manually and by at least one of 
the following means. 

1 Actuation of an automatic fire 
suppression system required by 780 CMR 
904.1. 

2 Actuation of a key-operated manual 
alarm station required by 780 CMR 917 4. 

3 A signal from a central control station. 

1017.4.2 Panic hardware: All doors equipped 
with latching devices in occupancies in Use 
Groups A and E or portions of buildings occupied 
for assembly or educational purposes and serving 
rooms or spaces with an occupant load greater 
than 1 00, shall be equipped with approved panic 
hardware. Acceptable panic hardware shall be a 
door latching assembly incorporating a device 
which causes the door latch to release and the leaf 
to open when a force of 15 pounds (73 N) is 
applied in the direction of egress to a bar or panel, 
the activating portion of which extends not less 
than one-half of the width of the door leaf and is 
applied at a height greater than 30 inches (762 
mm) but less than 44 inches (1118 mm) above the 
floor. The force shall be apphed at the lock side 
of the door or 30 inches (762 mm) from the 
hinged side, whichever is farther from the hinge. 
Where fire door assemblies are required to have 
panic hardware, approved fire exit hardware shall 
be used. 

1017.4.3 Power-operated doors: Where means 
of egress doors are operated by power, such as 
doors with a photoelectric-actuated mechanism to 
open the door upon the approach of a person, or 
doors with power-assisted manual operation, the 
design shall be such that in the event of power 
failure, the door is capable of being opened 
manually to permit means of egress travel or 
closed where necessary to safeguard means of 
egress. The forces required to open these doors 
manually shall not exceed those specified in 
780 CMR 1017.4 except that the force to set the 
door in motion shall not exceed 50 pounds (244 
N). The door shall be capable of swinging from 
any position to the full width of the opening in 
which such door is installed when a force is 
applied to the door on the side from which egress 
is made. 



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Exceptions: 

1. Occupancies in Use Group 1-3. 

2. Horizontal sliding doors complying with 
780 CMR 1017.4.4. 

1017.4.4 Horizontal sliding doors: In other than 
occupancies in Use Group H, horizontal sliding 
doors that are considered a component of a means 
of egress shall comply with all of the following 
criteria: 

1 . The door serves an occupant load of less 
than 50; 

2. The door shall be power operated and be 
capable of being operated manually in the 
event of power failure; 

3. The door shall be openable from both sides 
without special knowledge or efiFort; 

4. The force required to operate the door shall 
not exceed 30 pounds (146 N) to set the door in 
motion and 15 pounds (73 N) to close the door 
or to open such door to the minimum required 
width; 

5. The door shall be openable with a force not 
to exceed one ounds (73 N) when a force of 
250 pounds (12220 N) is applied perpendicular 
to the door adjacent to the operating device; 

6. The door assembly shall comply with the 
applicable fire protection rating and, where 
rated, shall be self-closing or automatic-closing 
by smoke detection, shall be installed in 
accordance with NFiPA 80 listed in Appendix 
A, and shall comply with 780 CMR 716.0; 

7. The door assembly shall have a standby 
power supply; 

8. The door shall open to the minimum 
required width within ten seconds after 
activation of the operating device; and 

9. The door assembly power supply shall be 
electrically supervised at a constantly attended 
location. 

1017.4.5 Access-controlled egress doors: The 

entrance doors in a means of egress in buildings 
ith an occupancy in Use Group A, B, E, M, R-1 or 
R-2 and entrance doors to tenant spaces in 
occupancies in Use Groups A, B, E, M, R-1 and 
R-2 are permitted to be equipped with an 
approved entrance and egress access control 
system which shall be installed in accordance 
with items 780 CMR 1017.4.5. 1. through 6. 

1. A sensor shall be provided on the egress 
side arranged to detect an occupant 
approaching the doors. The doors shall be 
arranged to unlock by a signal from or loss of 
power to the sensor. 

2. Loss of power to that part of the access 
control system which locks the doors shall 
automatically unlock the doors. 

3. The doors shall be arranged to unlock from 
a manual unlocking device located 40 inches 
(1016 mm) to 48 inches (1219 mm) vertically 
above the floor and within five feet (1 524 mm) 



of the secured doors. Ready access shall be 
provided to the manual unlocking device and 
the device shall be clearly identified by a sign. 
When operated, the manual unlocking device 
shall result in direct interruption of power to 
the lock - independent of the access control 
system electronics - and the doors shall remain 
unlocked for a minimum of 30 seconds 

4. Activation of the building fire protective 
signaling system, if provided, shall 
automatically unlock the doors, and the doors 
shall remain unlocked until the fire protective 
signaling system has been reset. 

5. Activation of the building automatic 
sprinkler or fire detection system, if provided, 
shall automatically unlock the doors The 
doors shall remain unlocked until the fire 
protective signaling system has been reset. 

6. Entrance doors in buildings with an 
occupancy in Use Group A B, E or M shall not 
be secured from the egress side during periods 
that the building is open to the general public. 

1017.5 Security grilles: Horizontal sliding or 
vertical security grilles which are part of a required 
means of egress shall be openable from the inside 
without the use of a key or special knowledge or 
effort during periods that the space is occupied. The 
grilles shall remain secured in the fijU-open position 
during the period of occupancy by the general 
public. Grilles shall not be brought to the closed 
position when there are more than ten persons 
occupying spaces served by a single exit or 50 
persons occupying spaces served by more than one 
exit. Where two or more exits are required, not more 
than one-half of the exits shall be equipped with 
horizontal sliding or vertical security grilles. 

1017.6 Level of exit discharge doors: Where 
glazed, doors at the level of exit discharge shall be 
glazed with approved safety glazing. Approved 
doors having one or more unframed edges shall be 
constructed of safety glazing not less than V2 inch 
thick. (Also see 780 CMR 2405) 

780 CMR 1018.0 REVOLVING DOORS 

1018.1 General: All revolving doors shall comply 
with 780 CMR 1018.2 through 1018.5. In other than 
occupancies in Use Group H, revolving doors that 
are considered a component of the means of egress 
shall comply with 780 CMR 1018.2 through 1018.6. 

1018.2 Collapse: Each revolving door shall be 
capable of collapsing into a book-fold position with 
parallel egress paths having an aggregate width of 
not less than 36 inches (914 mm). The revolving 
door shall collapse when a force of not more than 
180 pounds (880 N) is applied within 3 inches (76 
mm) of the outer edge of a wing. 



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THE MASSACHUSETTS STATE BUILDING CODE 



is reduced to not more than 130 pounds (635 N) 
when: 

1. There is a power failure or power is 
removed to the device holding the wings in 
position. 

2. There is an actuation of the automatic 
sprinkler system where such system is 
provided. 

3. There is an actuation of an automatic fire 
detection system installed in accordance with 
780 CMR 918.0 for all areas within the 
building which are within 75 feet (22860 mm) 
of the revolving doors. The collapse of the 
door(s) shall not be delayed by the alarm 
verification required by 780 CMR 918.7. 

4. There is an actuation of a manual control 
switch which reduces the holding force to not 
more than the 130-pound (635 N) force level. 
Such switch shall be in an approved location 
and shall be clearly identified. 

1018.3 Dispersal area: A revolving door shall not 
be located within ten feet (3048 mm) of the foot or 
top of stairways or escalators A dispersal area shall 
be provided between the stairways or escalators and 
the revolving doors. 

1018.4 Speed control: The revolutions per minute 
for a revolving door shall not exceed the speeds 
indicated in Table 1018.4. 





Table 1018.4 




REVOLVING DOOR SPEED 


Inside diameter 


Power-dnven type 

speed control 

(rpm) 


Manual-type speed 
control (rpm) 


6'6" 


11 


12 


7'0" 


10 


11 


7'6" 


9 


11 


8'0" 


9 


10 


s'e" 


8 


9 


9'0" 


8 


9 


9'6" 


7 


8 


lO'O" 


7 


8 



Note a. 1 foot = 304.8 mm; 1 inch = 25 4 mm 

1018.5 Adjacent area: Each revolving door shall 
have a conforming side-hinged swinging door in the 
same wall as, and within ten feet (3048 mm) of the 
revolving door. 

Exception: The adjacent swinging door is not 
required for street floor elevator lobbies if a 
stairway, escalator or door fi^om other parts of the 
building does not discharge through the lobby and 
the lobby does not have any occupancy other than 
as a means of travel between the elevators and 
street. 

1018.6 Means of egress: A revolving door to be 
considered as a component of a means of egress 
shall comply with 780 CMR 1018.2 through 1018.5 
and the following conditions: 



1 . Revolving doors shall not be given credit for 

more than 50% of the required exit capacity of the 

building. 

2 Each revolving door shall not be credited with 

more than a 50-person capacity. 

3. Each revolving door shall be capable of being 

collapsed when a force of not more than 130 

pounds (635 N) is applied within three inches (76 

mm) of the outer edge of a wing. 

780 CMR 1019.0 HORIZONTAL EXITS 

1019.1 General: Horizontal exits shall be accepted 
as an approved exit element of a required means of 
egress. The cormection between an area of a 
building which the horizontal exit serves and the 
area of refiige as herein required shall be 
accomplished by protected openings in a 
fireresistance rated wall, or by an open-air balcony 
or bridge. 

1019.2 Separation: The separation between 
buildings or areas of refuge connected by a 
horizontal exit shall be provided by at least a two- 
hour fireresistance rated ^/-e wall ox fire separation 
assembly with approved opening protectives 
complying with 780 CMR 7 and Table 602. 

1019.2.1 Doors: All doors shall swing in the 
direction of egress travel. Where the horizontal 
exit serves as an exit from both sides of the wall, 
there shall be adjacent openings with swinging 
fire doors opening in opposite directions. 

Exception: Horizontal sliding doors 

complying with 780 CMR 1017.4.4 where 
serving an occupant load of less than 50. 

1019.3 Area of refuge: The discharge area of a 
horizontal exit shall be either public areas or spaces 
occupied by the same tenant, and each such area of 
refuge shall be adequate to hold the total occupant 
load of both connected areas. The capacity of areas 
of refuge shall be computed on a minimum net floor 
area allowance for each occupant to be 
accommodated therein, not including areas of 
stairways, elevators and other shafts or courts, as 
follows: 

1 . 30 square feet (2.8 m^ per patient for hospitals 
and nursing homes. 

2. Six square feet (0.56 m^) per occupant on 
stories not housing patients confined to a bed or 
litter in an occupancy in Use Group 1-2. 

3. Six square feet (0.56 m^) per occupant in an 
occupancy in Use Group 1-3 . 

4. Three square feet (0.28 m^) in all other cases. 

1019.4 Egress from area of refuge: The path of 
egress travel from the horizontal exit through the 
area of reflige to another exit shall be continuously 
available. In other than occupancies in Use Group 
1-3, there shall be at least one exit on each side of the 
horizontal exit which is not a horizontal exit Any 



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MEANS OF EGRESS 



area of refuge not having access to an exit, other 
than a horizontal exit, shall be considered as part of 
an adjoining area of refuge with such exit. In the 
area(s) served by the horizontal exit, the length of 
exit access travel distance to the horizontal exit or 
another exit shall not exceed the requirements of 
780 CMR 1006.5. Occupancies in Use Group 1-3 
shall conform to 780 CMR 410.3.3. 

780 CMR 1020.0 LEVEL OF EXIT 

DISCHARGE PASSAGEWAYS USED 

AS AN EXIT ELEMENT 

1020.1 Passageways: Every required interior and 
exterior exit element which does not adjoin a. public 
way shall be directly connected to the public way or 
to an open court leading to the public way by an 
enclosed passageway at the level of exit discharge, 
constructed in accordance with the requirements for 
the enclosure of the exit it serves, or through lobbies 
or vestibules as provided for in 780 CMR 1020.0. 
Building areas below the level of exit discharge 
shall be separated from the passageway in 
accordance with the requirements for the enclosure 
of exits 

1020.2 Vestibule: Where an exit discharges into an 
interior vestibule, the vestibule shall be used for 
ingress and means of egress only, and the vestibule 
shall comply with 780 CMR 1020.2.1 and 1020.2.2. 

1020.2.1 Depth and width: The vestibule depth 
from the exterior of the building shall not be 
greater than ten feet (3048 mm) and the width 
shall not be greater than 20 feet (6096 mm). 

1020.2.2 Separation: The vestibule shall be 
separated from the remainder of the level of exit 
discharge by self-closing doors and the equivalent 
of %-inch-thick wired glass in steel frames. 

1020.3 Lobby: Where an exit discharges into an 
interior lobby located at the level of exit discharge, 
the story containing the lobby shall be equipped 
throughout with an automatic sprinkler system 
installed in accordance with 780 CMR 906.2. 1 or 
906.2.2. Opening protectives shall be required in 
accordance with Table 716. 1 at the point in which an 
enclosed exit stairway discharges into a lobby. 

Exception: An automatic sprinkler system is not 
required in areas that are separated from the lobby 
by fire separation assemblies (see 780 CMR 
709.0) having a fireresistance rating of not less 
than that required for exit enclosures. 

1020.4 Width and height: The clear width of the 
passageway shall not be less than the width required 
for the capacity of the exit stairways leading thereto 
and all required exit doorways opening into the 
passageway. Such passageway shall have a 
minimum width of 44 inches (1118 mm) and a 



minimum clear ceiling height of eight feet (23438 
mm). 

1020.5 Maximum stairway limitations: Not more 
than 50% of the required stairways shall discharge 
through the same passageway. Multiple lobbies 
constructed in accordance with 780 CMR 1020.3 
located adjacent to one another shall be separated 
from each other in accordance with the requirements 
for enclosure of exits. 

780 CMR 1021.0 GUARDS 

1021.1 General: Where required by the provisions 
of780 CMR 406.5, 408.3.2, 1005.5, 1014.7, 1016.5 
and 1825.5, guards shall be designed and 
constructed in accordance with the requirements of 
780 CMR 1021.0 and 780 CMR 1615.5. A guardrail 
system is a system of building components located 
near the open sides of elevated walking surfaces for 
the purpose of minimizing the possibility of an 
accidental fall from the walking surface to the lower 
level. 

1021.2 Height: The guards shall be at least 42 
inches (1067 mm) in height measured vertically 
above the leading edge of the tread or adjacent 
walking surface. 

Exceptions: 

1. In other than occupancies in Use Group E, 
guards shall not be less than 34 inches (864 mm) 
in height above the leading edge of the tread 
along stairs which are not more than 20 feet (6096 
mm) in height or which reverse direction at an 
intermediate landing with 12 inches (305 mm) or 
less measured horizontally between successive 
flights. 

2. Guards along open-sided floor areas, 
mezzanines and landings in occupancies in Use 
Group R-3 shall not be less than 36 inches (914 
mm) in height. 

1021.3 Opening limitations: In occupancies in Use 
Groups A, B, E, H-4, I-l, 1-2, M and R, and in 
public garages and open parking structures, open 
guards shall have balusters or be of solid material 
such that a sphere with a diameter of four inches 
(102 mm) cannot pass through any opening. Guards 
shall not have an ornamental pattern that would 
provide a ladder effect. 

Exception: The triangular openings formed by 

the riser, tread and bottom rail at the open side of 

a stairway shall be of a maximum size such that a 

sphere six inches (152 mm) in diameter cannot 

pass through the opening. 

In occupancies in Use Groups 1-3, F, H- 1 , H-2, H- 

3 and S, other thanpublic garages and open parking 

structures, balusters, horizontal intermediate rails or 

other construction shall not permit a sphere with a 

diameter of 21 inches (533 mm) to pass through any 

opening. 



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IHE MASSACHUSETTS STATE BUTLDE^G CODE 



1021.4 Railings: Metal or other approved 
noncombustible railings shall be provided on 
balconies and galleries as prescribed in 780 CMR 
1021.4.1 through 1021.4.3. 

1021.4.1 At fascia: Railings shall be provided: 
at the fascia of boxes, balconies and galleries and 
shall not be less than 26 inches (660 mm) in 
height; at the end of aisles extending to the fascia 
for the fiill width of the aisle and shall not be less 
than 36 inches (914 mm) in height; and at the foot 
of steps for the full width of the steps and shall 
not be less than 42 inches (1067 mm) in height. 

1021.4.2 At cross aisles: Railings shall be 
provided along cross aisles, and shall not be less 
than 26 inches (660 mm) in height except that 
railings are not required where the backs of the 
seats along the front of the aisles project 24 inches 
(610 mm) or more above the floor of the aisle. 

1021.4.3 Successive tiers: Where seatings are 
arranged in successive tiers, and where the height 
of rise between platforms exceeds 18 inches (457 
mm), railings not less than 26 inches (660 mm) in 
height shall be provided along the entire row of 
seats at the edge of the platform. 

780 CMR 1022.0 HANDRAILS 

1022.1 General; Where required by the provisions 
of780 CMR 1012.5, 1013.0, 1014.6.6.1, 1014.7 and 
1016.5, handrails shall be designed and constructed 
in accordance with 780 CMR 1022.0 and 780 CMR 
1615.5. A handrail is a horizontal or sloping rail 
grasped by hand for guidance or support, and for 
arresting falls on the adjacent walking surface. 

1022.2 Handrail details: Handrail-gripping 
surfaces shall be continuous, without interruption by 
newel posts, other structure elements or 
obstructions. A handrail and any wall or other 
surface adjacent to the handrail shaU be free of any 
sharp or abrasive elements. The clear space between 
the handrail and the adjacent wall or surface shall 
not be less than Wi inches (38 mm). Edges shall 
have a minimum radius of Vs inch (3 mm). 

1022.2.1 Projection: Handrails shall not project 
more than 314 inches (89 mm) into the required 
passageway, aisle, corridor, stair or ramp width. 

1022.2.2 Height: Handrails shall not be less than 
34 inches (864 mm) nor more than 38 inches 
(965 mm), measured vertically, above the leading 
edge of the treads or above the finished floor of 
the landing or walking surfaces. 

Exceptions: 

1 Handrails that form part of a guard shall 

have a height not less than 34 inches (864 mm) 

and not more than 42 inches (1067 mm). 

2. Handrails within individual dwelling units 

shall not be less than 30 inches (762 mm) nor 

more than 38 inches (965 mm), measured 



vertically, above the leading edge of the treads 
or above the finished floor. 

1022.2.3 Handrails in guards: Handrails that 
form part of a guard shall comply with 780 CMR 
1021.3. 

1022.2.4 Handrail ends: At locations where 
handrails are not continuous between stairway 
flights, including the top and bottom of a 
stairway, the handrails shall extend horizontally 
at least 12 inches (305 mm) beyond the top riser 
and continue to slope for the depth of one tread 
beyond the bottom riser. The handrail ends shall 
be returned to a wall or post. 

Where handrails are not continuous between 
ramp segments, including the top and bottom of a 
ramp, the handrails shall extend at least 12 inches 
(305 mm) beyond the top and bottom of the ramp 
segment and shall be parallel with the floor or 
ground surface. The handrail ends shall be 
returned to a wall or post. 

Exception: Within a dwelling unit, the 
horizontal extension beyond the top riser of the 
stairway ih^t or top of the ramp segment, and 
the extension beyond the bottom riser of the 
rfozrway flight or bottom of the ramp segment, 
is not required. 

1022.2.5 Handrail grip size: All stairway 
handrails shall have a circular cross section with 
an outside diameter of at least IVi-inches (32 mm) 
and not greater than two inches (51 mm) 

Exceptions: 

1 . Any other shape with a perimeter dimension 
of at least four inches (100 mm), but not 
greater than 6'A inches (158 mm) with the 
largest cross-sectional dimension not 
exceeding 2'A inches (57 mm) 

2. Approved rails of equivalent graspability. 

1022.2.6 Handrails of alternating tread 
stairways: Stair handrails of alternating tread 
stairways shall be of such a configuration as to 
provide an adequate hand-hold for a person 
grasping the handrail to avoid falling. A 
minimum distance of six inches (152 mm) shall 
be provided between the stair handrail and any 
other object. A minimum distance of 12 inches 
(305 mm) shall be provided between the stair 
handrails of adjacent alternating tread stairways. 
Handrails on alternating tread stairways shall be 
spaced a minimum width of 17 inches (432 mm), 
not to exceed 24 inches (610 mm), between the 
handrails. 

780 CMR 1023.0 EXIT SIGNS AND UGHTS 
1023.1 Location: In all buildings, rooms or spaces 
required to have more than one exit or exit access, 
all required means of egress shall be indicated with 
approved signs reading "Exit," visible from the exit 
access and, where necessary, supplemented by 
directional signs in the exit access corridors 



196 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

MEANS OF EGRESS 

780 CMR 1028.0 MAINTENANCE OF EXITS tie directly into the building structural system, all 

1028.1 Obstructions: It shall be unlawful to ■'"'"^ ^'"^" *^ ^^'^^^' '^ necessary, to prevent 

obstruct, or reduce in any manner, the clear width of ^'^^'' f''"'" '''"n<'8'"g or corroding structural 

any doorway, hallway, passageway or other means elements. 

of egress required by the provisions of 780 CMR. 

1028.3 Testing and Certification: All exterior 

1028.2 Maintenance: All exterior stairways and '"'^Ses, steel or wooden stairways, fire escapes and 
fire escapes shall be kept free of snow and ice. ^^ress balconies shall be examined and/or tested. 
Exterior stairways and fire escapes constructed of "'"' certified for structural adequacy and safety 
materials requiring the application of weather every five years, by a Massachusetts registered 
protecting products, shall have these products P'^ofesswnal engineer, or others qualified and 
appUed in an approved manner and shall be applied "eceptable to the building official; said engineer or 
as often as necessary to maintain the stairways and "'^^^ ^^'^^ *'*^" *"*'"'' "« lO^""'' *" the building 
fire escapes in safe condition where corrodible "fficiaL 

structural parts of such stairways and fire escapes 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 

NON-TEXT PAGE 



"°° 780 CMR - Sixth Edition 2/7/97 (Effective 2/28/97) 



CHAPTER 11 

ACCESSIBILITY 

(780 CMR 11 is Entirely Unique to Massachusetts) 

780 CMR 1101.0 MG.L a 22, ^ ISA provides that Architectural Access Board, Executive Office of 

all public buildings shall be designed to be Public Safety. 

accessible to, fitnctional for and safe for the use by In accordance with M.G.L c. 143, § 3 and 

physically handicapped persons, in conformance 780 CMR 106.1, said regulations shall be enforced 

with the Massachusetts Architectural Access by the municipal building code enforcement 

Board's Rules and Regulations (521 CMR 1. 00) official or state inspector, as applicable 

listed in Appendix A and promulgated by the 



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780 CMR: STATE BOARD OF BULLDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUELDING CODE 

NON-TEXT PAGE 



202 780 CMR - Sixth Edition 2/27/97 (Effective 2/28/97) 



CHAPTER 12 



INTERIOR ENVIRONMENT 



780 CMR 1201.0 GENERAL 

1201.1 Scope: The provisions of 780 CMR 12 shall 
govern the means of light, ventilation, sound 
transmission control and rat-proofing required in all 
buildings. 

1201.2 Buildings on same lot: Where more than one 
building is hereafter placed on a lot, or where a 
building is placed on the same lot with existing 
buildings and the several buildings are treated as a 
single structure for the purposes of 780 CMR 12, 
equivalent uncovered lot area or other adequate 
sources of light and ventilation shall be provided for 
all occupied buildings. 

780 CMR 1202.0 DEFINITIONS 
1202.1 General: The following words and terms 
shall, for the purposes of 780 CMR 12 and as used 
elsewhere in 780 CMR, have the meanings shown 
herein. 

Attic: The space between the ceiling beams of the 
top story and the roof rafters. 

Court: An open, uncovered and unoccupied space 
on the same lot as a building where such space is 
enclosed wholly or partly by buildings, walls or 
other enclosing devices (see 780 CMR 1212.0). 
Inner: Any court enclosed wholly by buildings, 

walls or other enclosing devices. 
Outer: A court extending to and opening upon a 

street, public alley or other approved open 

space that is not less than 15 feet (4572 mm) 

wide, or upon a required yard. 

Court height: The vertical distance from the lowest 
level of the court to the mean height of the top of 
the enclosing walls. 

Court width: As applied to an inner court, means 
the least horizontal dimension. As applied to an 
outer court, means the shortest horizontal 
dimension measured in a direction substantially 
parallel with the principal open end of such court. 

Habitable space: Space in a structure for living, 
sleeping, eating or cooking. Bathrooms, toilet 
compartments, closets, halls, storage or utility 
spaces and similar areas are not considered 
habitable spaces. 

Occupiable space: A room or enclosed space 
designed for human occupancy in which 
individuals congregate for amusement, 



educational or similar purposes, or in which 
occupants are engaged at labor; and which is 
equipped with means of egress and light and 
ventilation facilities meeting the requirements of 
780 CMR. 

Vapor retarder: A material having a perm rating of 
1.0 or less, such as foil, plastic sheeting, or 
insulation feeing, installed to retard the passage of 
water vapor or moisture through the exterior 
envelope. 

Ventilation: The natural or mechanical process of 
supplying conditioned or unconditioned air to, or 
removing such air from, any space. 

Yard: An unoccupied open space other than a court 
(see 780 CMR 1212.0 and 1213.0). 

780 CMR 1203.0 CONSTRUCTION 
DOCUMENTS 

1203.1 General: Construction documents for all 
buildings and structures that are designed for human 
occupancy, other than buildings with occupancies in 
Use Groups I-l, R-2 and R-3, shall designate the 
number of occupants to be accommodated in the 
various rooms and spaces; where means of artificial 
lighting and ventilation are required, the application 
shall include sufficient details and description of the 
mechanical system to be installed as herein required 
or as specified in the mechanical code listed in 
Appendix A. 

780 CMR 1204.0 ROOM DIMENSIONS 
1204.1 Ceiling heights: Habitable (spaces) rooms 
other than kitchens shall have a ceiling height of not 
less than seven feet sbc inches (2286 mm). 
Hallways, corridors, bathrooms, toilet rooms, 
kitchens, laundry rooms and habitable basements 
that are only used as recreation rooms shall have a 
ceiling height of not less than seven feet (2134 mm) 
measured to the lowest projection from the ceiling. 

Exception: In occupancies in Use Group R-3, the 
maximum projection below the required ceiling 
height of beams and girders spaced not less than 
four feet (1219 mm) on center shall be six inches 
(152 mm). 

1204.1.1 Use Groups A, B, E and M: A clear 
height from the finished floor to the finished 
ceiling or lowest projection of not less than seven 
feet six inches (2286 mm) shall be provided in all 
exit access and occupiable rooms of structures of 
Use Groups A, B, E and M. 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 
THE MASSACHUSETTS STATE BUILDING CODE 



1204.1^ Sloping ceilings: If any room in a 
building has a sloping ceiling, the prescribed 
ceiling height for the room is required in one-half 
the area thereof Any portion of the room 
measuring less than five feet (1 524 mm) fi'om the 
finished floor to the finished ceiling shall not be 
included in any computation of the minimum area 
thereof 

1204.U Furred ceilings: If any room has a 
furred ceiling, the prescribed ceiling height is 
required in two-thirds of the area thereof, but the 
height of the furred ceiling shall not be less than 
seven feet (2134 mm). 

1204.2 Floor area: Habitable rooms, except 
kitchens, shall have an area of not less than 70 
square feet (6.51 m^). 

12043 Width: A habitable room other than a 
kitchen shall not be less than seven feet (2134 mm) 
in any dimension. 

780 CMR 1205.0 UGHT AND VENTILATION 
REQUIRED 

1205.1 Light required: Every room or space 
intended for human occupancy shall be provided 
with natural or artificial light. 

1205.1.1 Bathroom and toilet room lighting: 

Every bathroom and toilet room shall be provided 
with artificial light. The illumination shall have 
an average intensity of three footcandles (32.29 
lux) measured at a level of 30 inches (762 mm) 
above the floor. 

1205.2 Ventilation required: Every room or space 
intended for human occupancy shall be provided 
with natural or mechanical ventilation. 

1205.2.1: Every bathroom containing a bathtub 
and/or shower shall be equipped with a 
mechanical exhaust fan and associated 
ductwork with the fan exhausting, at such rates 
as specified in the BOCA National Mechanical 
Code/1993 as referenced in Appendix A. Passive 
ventilation methods such as openable windows 
shall not substitute for ventilation. Such 
bathroom exhaust shall vent directly to the 
outside and no exhaust vent shall terminate in 
attics or other interior portions of the building. 
Note: See also 105 CMR 410.000 

780 CMR 1206.0 NATURAL UGHT 

1206.1 General: Should natural lighting be chosen 
as a lighting option, in the application of the 
provisions of 780 CMR 12, the standard of natural 
light for all habitable and occupiable rooms, unless 
otherwise specifically required by the provisions of 
780 CMR 4 for special occupancies, shall be based 
on 250 footcandles (2691 lux) of illumination on the 



vertical plane adjacent to the exterior of the light- 
transmitting device in the enclosure wall and shall 
be adequate to provide an average illumination of six 
footcandles (64.58 lux) over the area of the room at 
a height of 30 inches (762 mm) above the floor 
level. 

1206.2 Minimum glazing area: Every room or 
space intended for human occupancy shall have an 
exterior glazing area of not less than 8% of the floor 
area. Natural light shall be provided by glazing 
areas that open onto courts or yards which comply 
with the requirements of 780 CMR 1212.0, or by 
other approved means. 

1206.2.1 Adjoining spaces: Where natural light 
for rooms or spaces without exterior glazing areas 
is provided through an adjoining room, the 
unobstructed opening to the adjoining room shall 
be at least 8% of the floor area of the interior 
room or space, but not less than 25 square feet 
(2.33 m^). The exterior glazing area shall be 
based on the total floor area being served. 

1206.3 Stairways: Interior stairways shall be 
provided with an exterior glazing area of not less 
than ten square feet (0.93 m^) on every floor through 
which the stairway passes. 

1206.4 Hallways: Natural light shall be capable of 
penetrating the full length of the hallway. 

780 CMR 1207.0 ARTIFICIAL UGHT 
1207.1 General: Should artificial lighting be 
chosen as a lighting option, artificial light shall be 
capable of providing the minimimi illumination 
specified for natural light. 

780 CMR 120&0 NATURAL 
VENTILATION 

1208.1 General: Should natural ventilation be 
chosen as a ventilation option, natural ventilation of 
an occupied space shall be through windows, doors, 
louvers or other natural openings to the outdoor air. 

Exception: All occupancies shall have 
mechanical ventilation in bathrooms and toilet 
rooms as specified in 780 CMR 1205.2.1. 

1208.2 Ventilation area requiriftd: The minimum 
openable area to the outdoors shall be 4% of the 
floor area being ventilated. 

1208.2.1 Adjoining spaces: Where rooms and 
spaces without openings to the outdoors are 
ventilated through an adjoining room, the 
unobstructed opening to the adjoining room shall 
be at least 8% of the floor area of the interior 
room or space, but not less than 25 square feet 
(2.33 m^). The ventilation openings to the 
outdoors shall be based on the total floor area 
being ventilated. 



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INTERIOR ENVIRONMENT 



1208.2.2 Openings below grade: Openings 
below grade shall be acceptable for natural 
ventilation provided that the outside horizontal 
clear space measured perpendicular to the opening 
is 1 '/j times the depth below the average adjoining 
grade. 

1208J Contaminants exhausted: Contaminants in 
the breathing atmosphere shall be exhausted to the 
outdoor air in accordance with the mechanical code 
listed in Appendix A . 

1208.4 Openings onto yards or courts: Natural 
ventilation shall be provided by openings onto yards 
or courts which comply with the requirements of 
780 CMR 1212.0, or by other approved means. 

780 CMR 1209.0 MECHANICAL 
VENTILATION 

1209.1 General: Should mechanical ventilation be 
chosen as the ventilation option, mechanical 
ventilation shall conform to the requirements of the 
mechanical code listed in Appendix A. 
Note: Also see 780 CMR 1205.2.1 

780 CMR L210.0 VENTILATION OF 
SPECIAL SPACES 

1210.1 Roof spaces: Enclosed attics and enclosed 
rafter spaces formed where ceilings are applied 
directly to the underside of roof rafters, shall have 
cross ventilation for each separate space by 
ventilation openings that are protected against the 
entrance of rain and snow. The openings shall be 
covered with corrosion-resistant mesh not less than 
Vt inch (6 mm) nor more than '/z inch (1 3 mm) in any 
direction. 

1210.1.1 Ventilating area: The minimum 
required net free ventilating area shall be 1/150 of 
the area of the space ventilated, except that the 
minimum required area shall be reduced to 1/300, 
provided that: a vapor retarder having a 
permeance not exceeding one perm is installed on 
the warm side of the ceiling; or at least 50%, and 
not more than 80%, of the required ventilating 
area is provided by ventilators located in the 
upper portion of the space to be ventilated at least 
three feet (914 mm) above eave or cornice vents, 
with the balance of the required ventilation 
provided by eave or cornice vents. 

1210.2 Crawl spaces: Crawl space areas, other than 
those used as an underfloor plenum, shall be 
ventilated by an approved mechanical means or by 
openings in cxtcnor foundation walls. Openings 
shall be located as close to comers as practicable and 
shall provide cross ventilation on at least two 
approximately opposite sides. The openings shall be 
covered with corrosion-resistant mesh not less than 
% inch (6 mm) nor more than 14 inch (13 mm) in any 
direction. 



1210.2.1 Opening size: Openings shall have a net 
area of not less than one square foot (0.093 m*) 
for each 1 50 square feet (1 3 .95 m') of foundation 
space. Where an approved vapor retarder is 
installed over the ground surface, the required net 
area of openings shall be reduced to 0.1 square 
foot (0.093 m^) for each 150 square feet (13.95 
m^) and vents shall have manually operable 
louvers. 

1210J Alteraative mechanical ventilation: 

Enclosed attic, rafter and crawl spaces which are not 
ventilated as herein required shall be equipped with 
a mechanical ventilation system conforming to the 
requirements of the mechanical code listed in 
Appendix A. 

780 CMR 1211.0 ACCESS TO CRAWL 
SPACES AND ATTICS 

1211.1 Access to crawl spaces: Access shall be 
provided to crawl spaces by an opening not less than 
1 8 inches (457 mm) by 24 inches (610 mm). Such 
access, if common to conditioned space, shall be 
weatherstripped and shall close tightly. 

1211.2 Access to attics: An opening not less than 22 
inches by 30 inches (559 mm by 762 mm) with 
ready access thereto shall be provided to any attic 
area having a clear height of over 30 inches (762 
mm). Such access, if adjoining conditioned space, 
shall be weatherstripped, and close tightly. All 
such access opening framing joints shall be 
caulked, gasketed, weatherstripped, foamed or 
otherwise sealed to limit infiltration/exfUtration. 
Where doors or other openings are installed in attic 
draftstopping, such doors shall be self-closing and 
be of approved materials as specified in 780 CMR 
1211.0, and the construction shall be tightly fitted 
around all pipes, ducts or other assemblies piercing 
the draftstopping. 

780 CMR 121Z0 COURTS AND YARDS 

1212.1 General: All courts and yards required to 
serve rooms for natural light or ventilation purposes 
shall comply with the requirements of 780 CMR 
1212.0. 

1212.2 Minimum width: Every such court or yard 
shall have a minimum width of three inches (76 nun) 
for each one foot (305 mm) of height or fraction 
thereof, but not less than five feet (1524 mm) for 
outer courts and twice these values for inner courts. 

1212.2.1 Irregular court or yard width: In the 

case of irregular or gore-shaped courts or yards, 
the average width shall not be less than the 
required width of a court in accordance with 
780 CMR 1212.2, but shall not be less than five 
feet (1 524 mm) at any point. 



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THE MASSACHUSETTS STATE BUILDING CODE 



12123 Area of court: The cross-sectional area of a 
required court shall not be less than 114 times the 
square of its width; nor shall the length of any court 
be more than twice its width. 

1212.4 Access to court: A door or other means of 
access shall be provided at the bottom of every court 
that is not otherwise provided with convenient 
access for purposes of cleaning. 

1212.5 Air intakes: Every court which serves one or 
more habitable rooms and which does not open for 
its fill! height on one or more sides to a street or 
legal yard, shall be connected at or near the bottom 
with a street or yard by a horizontal intake or 
passage of fireresistance rated construction. Such 
intake or passage shall have a cross-sectional area of 
not less than 21 square feet (1.95 m^) and shall 
remain fiilly open at both ends and unobstruaed for 
its flill size and length, except that grilles of 
noncombustible construction are permitted at the 
ends of the intake. 

1212.5.1 Fireresistance rating: The walls, floors 
and ceilings of such intakes or passages shall have 
a fireresistance rating of not less than two hours in 
buildings of Type 1, 2, 3 or 4 construction and not 
less than a one-hour fireresistance rating in 
buildings of Type 5 construction. 

1212.6 Court walls; Where, in the opinion of the 
code official, windows facing on courts do not 
receive adequate direct light by reason of peculiar 
arrangement or orientation, the code official shall 
require the walls to be constructed of light-colored 
masonry, or to be painted and maintained a light 
color to furnish additional reflected light, or shall 
require other approved means of providing 
additional light. 

1212.7 Court drainage: The bottom of every court 
shall be properly graded and drained to a public 
sewer or other approved disposal system complying 
with the plumbing code listed in Appendix A; and 
shall be paved with concrete or other non-absorbent 
material where required by the code official. 

780 CMR 1213.0 OBSTTRUCnON OF 
COURTS AND YARDS 

1213.1 Permissible projections: Every required 
court and yard shall remain unobstructed for its 
required area and fiill height, except for the 
projections permitted in 780 CMR 1213.2 through 
1213.7. 

1213.2 Maximum encroachment: A part of any 
building or structure shall not extend into side 
courts, inner courts or yards required for light and 
^'entilation oi habitable and occupiable rooms by the 
zoning law or other statutes controlling building 



construction. The encroachment shall not exceed 
20% of the legal area of the yard or court which is 
required for light and ■ventilation purposes. 

1213 J Accessories: In Use Groups R and I, clothes 
poles, arbors, garden trellises and other such 
accessories shall not be prohibited in the open 
spaces at ground level. 

1213.4 Roof eaves: Roof eaves shall not project 
more than three feet (914 mm) beyond the face of 
the wall. 

1213.5 Steps and architectural features: Steps, 
window sills, belt courses and similar architectural 
features, as well as rain leaders and chimneys, shall 
not project more than two feet (610 mm) beyond the 
face ofthewa//. 

1213.6 Exterior stairways and fire escapes: 

OvAsxde stairways, smokeproof tower balconies, fire 
escapes or other required elements of a means of 
egress shall not project more than four feet (1219 
mm) beyond the face of the wall. 

1213.7 Motor vehicle parking: Where approved, 
required court and yard areas for automobile parking 
spaces or private garages not exceeding one story in 
hei^t where accessory to and only for the occupants 
of a Use Group R occupancy are permitted, provided 
that required windows for light and ventilation are 
not obstructed thereby. 

780 CMR 1214.0 SOUND TRANSMISSION 
CONTROL IN RESIDENTIAL BUILDINGS 

1214.1 Scope: 780 CMR 1214.0 shall apply to all 
common interior walls, partitions and floor/ceiling 
assemblies between adjacent dwelling units or 
between dwelling units and adjacent public areas 
such as halls, corridors, stairs or service areas in all 
occupancies in Use Group R. 

1214.2 Air-borne noise: Walls, partitions and 
floor/ceiling assemblies separating dwelling units 
fi-om each other or from public or service areas shall 
have a sound transmission class (STC) of not less 
than 45 for air-borne noise when tested in 
accordance with ASTM E90 listed in Appendix A. 
This requirement shall not apply to dwelling unit 
entrance doors, however, such doors shall be tight 
fitting to the frame and sill. 

1214.3 Structure-borne sound: Floor/ceiling 
assemblies between dwelling units or between a 
dwelling unit and a public or service area within the 
structure shall have an impact insulation class (IIC) 
rating of not less than 45 when tested in accordance 
with ASTM E492 listed in Appendix A. 



780 CMR - Sixth Edition 



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780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS 

INTERIOR ENVIRONMENT 



780 CMR 1215.0 RATPROOFING 

1215.1 Ratproofing: All buildings or structures and 
the walls enclosing habitable or occiipiable rooms 
and spaces in which persons live, sleep or work, or 
in which feed, food or foodstuffs are stored, 
prepared, processed, served or sold, shall be 
constructed in accordance with the provisions of 
780 CMR 1215.0. 

1215.2 Grade protection: Buildings not provided 
with a continuous foundation shall be provided with 
protection against rodents at grade in accordance 
with either 780 CMR 1215.2.1 or 1215.2.2. 

1215.2.1 Apron; Where an apron is provided, the 
apron shall not be less than eight inches (203 mm) 
above, nor less than 24 inches (610 mm) below 
grade. In all cases the apron shall not terminate 
below the lower edge of the siding material. The 
apron shall be constructed of an approved 
nondecayable, water-resistant and ratproofing 
material of required strength and shall be installed 
around the entire perimeter of the building. 
Where constructed of masonry or concrete 
materials, the apron shall not be less than four 
inches (102 mm) in thickness. 

1215.2.2 Grade floors: Where continuous 
concrete grade floor slabs are provided, open 



spaces shall not be left between the slab and 
walls, and all openings in the slab shall be 
protected. 

1215.3 Opening protection: Openings shall be 
protected in accordance with 780 CMR 1215.3.1 
through 1215.3 3. 

1215.3.1 Wall openings: Openings in the wall or 
apron required for ventilation or other purposes 
shall be guarded with corrosion-resistant ratproof 
shields of not less than nominal 0.034-inch 
perforated steel sheets, or No. 20 B&S Gage 
aluminum (0.032 inch) or nominal 0.064-inch 
expanded steel or wire mesh screens, with not 
more than Vi-inch (13 mm) mesh openings. 

1215.3.2 Slab openings: Access openings in 
grade floor slabs shall be protected with concrete, 
masonry, metal or other corrosion-resistant 
noncombustible cover of adequate strength to 
support the floor loads. 

1215.3.3 Pipe and conduit openings: All openings 
for pipe, conduit, cable and similar purposes at or 
near grade shall have snugly fitted collars to 
eliminate all open spaces. 



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THE MASSACHUSETTS STATE BUILDING CODE 
NON-TEXT PAGE 



208 780 CMR - Sixth Edition 2/7/97 (Effective 2/28/97) 



CHAPTER 13 



ENERGY CONSERVATION 

(This Chapter is entirely unique to Massachusetts) 

NOTE: The provisions of Chapter 13 specified herein apply to projects for which permit applications are made after 
January 1, 2001. 

Exception 1 : Between January 1 , 2001 and June 30, 2001 , projects may utilize either the provisions of Chapter 1 3 as 
specified herein, or the provisions of Chapter 13 specified in 780 CMR Sixth Edition effective 2/28/97. 
Exception 2: Tables 1305.3.3a through f (HVAC equipment performance requirements) do not take effect until 
October 29, 2001. 

780 CMR 1301.0 ADMINISTRATION provided otherwise specifically by 780 CMR 13. 



1301.1 Scope: 780 CMR 13 sets forth requirements 
for the effective use of energy in structures other 
than low rise residential buildings, which shall be 
designed and constructed to comply with the 
requirements of 780 CMR APPENDIX J. 

Exception: For the purposes of energy 
conservation, Use Group R-1 buildings are to be 
treated as commercial buildings. 

1301.2 Compliance: Buildings shall be deemed to 
be in compliance with 780 CMR 13 when built to 
the provisions of 780 CMR 1301 and 1303, and 
either: 

1. 780 CMR 1303 through 1308; or 

2. 780 CMR 1309. 

Exception: As an alternative to the provisions 
of 780 CMR 1304, buildings with total floor 
area not greater than 10,000 square feet may be 
designed and constructed using the envelope 
requirements of 780 CMR APPENDIX J. 

1301.2.1 Heating, Pumping, Process Piping and 
Refrigeration Systems: Heating, pumping, 
process piping and refrigeration systems shall be 
installed by contractors and personnel 
appropriately licensed in the Commonwealth of 
Massachusetts (Installing Contractor). Engineered 
designs and specifications prepared by Registered 
Professional Engineers shall identify systems 
requiring compliance with appropriate sections of 
M.G.L. c. 146 and 528 CMR. Shop drawings and 
design layout prepared by licensed installing 
contractors shall note the name(s), license 
number(s) and license expiration date(s) of the 
contractor(s) installing the heating, pumping, 
process piping and refrigeration systems. (See 
Installing Contractor Defmition 780 CMR 202.0). 

13013 Other Regulations: 780 CMR 13 is not 

intended to abridge any safety or health provisions 
required under any other applicable codes or 
ordinances. 

1301.4 Existing BuDdings: Nothing in 780 CMR 13 

shall require the removal, alteration, or abandon- 
ment, or prevent the continuance of the use and 
occupancy of, a lawfully existing building, unless 



130U Additions to Existing Buildings: Additions 
to existing buildings or structures shall be made 
without making the entire building or structure 
comply. The new construction shaU conform to the 
provisions of 780 CMR 13 as they relate to the 
addition only. 



1301.6 Alterations to Existing Buildings: 

780 CMR 3407. 



See 



1301.7 Exempt Buildings: The following buildings 
are exempt from the further provisions of 780 CMR 
13, with the exception of 780 CMR 1308.0 dealing 
with lighting requirements: 

1. Buildings and structures or portions thereof 
whose peak design rate of energy usage is less 
than one watt per square foot or three and foiu 
tenths (3.4) Btu/h per square foot of floor area for 
all purposes; 

2. Buildings and structures or po