The Flow Of Gases In Furnaces

ARCH BRICK WORK 177

2~v ........ (1)

• a 0.5Z
S1Q2=— .......... (2)

,==6.2832rXa(deg.)

360 - ..... (3)
or

= 0.01754rXa(deg.).

'd=r~v .......... (4)

r'=r+t .......... (5)

e=0.01754r'Xa(deg.) ..... (6)

k=c~b ........ - . . (7)

°~e-f- ......... (8)

s»

-= n = total number of brick in span. . ... (9)

k
-== n'=number of taper brick in span. . . (10)
»7
n--72/=n''=number of straight brick in span. . (11)
3P I
Thrust, uniform loading =Tu--~~.
juV
3PI
Thrust, concentrated Io&d=Tc = '-—~.
Pu = uniform load, pounds per square foot.
* Pc = concentrated load in pounds at center of span.
When several concentrated loads are to be considered, reduce
to an equivalent concentrated center load.