TM 55-07/NAVSEA OP 3221 Rev 2
(4) Nonheat securing structures can be installed in lower holds through which the shaft alley extends.
Construction details are shown in figure 7-17. Uprights of 2by 4-inch lumber on 36-inch centers are cut level with the top
of the shaft alley, over which flooring may be laid to provide additional stowage space. Double uprights, as illustrated,
are not required unless obstructions on the shaft alley protrude from the surface.
7-5. Partition Bulkheads
Partition bulkheads are constructed when military explosives must be separated by type or weight or
Figure 7-17. Construction details for nonheat securing structures against the shaft alley.