Civil engineer guide to fighting positions, shelters, obstacles

AFH 10-222 Volume 14 1 August 2008 67
3.3.2.5. Overhead Cover. After installing the waterproof membrane, the next
step is to put the overhead cover in place. This requires 24 sections of containers,
2 feet high, 2 feet wide, and 4 feet long. Place the units as illustrated
in Figure 3.13, making sure the sandbags are beneath the edges of the units
to prevent soil from leaking through and on to roof. Fill each unit with loose
soil and lightly compact. Once this is complete, place approximately 2 feet of
soil in the center of the roof. Once this is completed, refer to Table 3.3 and
do a quick visual check to make sure the structure is intact.
Figure 3.13. Overhead Cover – ISO Bunker.
Table 3.3. Visual Checklist – ISO Bunker.
1 Make sure there is no excessive deflection of the roof (up to 1 ½
inches is acceptable)
2 Make sure the roof supports are centered on the sidewalls
3 Make sure sheet pilings are fully supported by the roof supports
4 Make sure all walls are straight
5 Make sure there is no excessive settlement of the walls