BEAMS AHD PILLARS

451

Pillars may be constructed of solid round bars, tubes, channel bars
riveted back to back, four angle bars riveted together, or of various
built up sections.

Their size depends on whether they are closely or widely spaced,
their height and the weight to be carried. Closely spaced pillars are
an advantage structurally but are very much in the way when stowing

Head'

Fig. 38 —Pillars

Heel

Head

Fig. 39.—Pillare.

Heel

cargo, so the modern tendency is to keep cargo spaces as clear of pillars
as possible in order to avoid broken stowage and loss of space. Centre
line pillars are very useful, however, when erecting midship longitudinal
shifting boards for grain cargoes, some ships are fitted with portable
pillars.
The Figures 38 and 39 illustrate methods of securing the heads and
ixeels of pillars.