Civil engineer guide to fighting positions, shelters, obstacles
Civil engineer guide to fighting positions, shelters, obstacles
Civil engineer guide to fighting positions, shelters, obstacles
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AFH 10-222 Volume 14 1 August 2008 35<br />
Figure 2.9. Illustration of Unsupported Span and On-Center Spacing.<br />
2.5.1.8.3. Dustproof Layer. Once the stringers are properly placed, put a<br />
dustproof layer over the base logs/stringers (Figure 2.10). The dustproof<br />
layer could be 4-feet by 4-feet sheets of 3/4-inch plywood. Nail the plywood<br />
dustproof layer <strong>to</strong> the stringers. This layer will also help <strong>to</strong> keep water from<br />
leaking through the overhead cover in<strong>to</strong> the <strong>fighting</strong> position.<br />
Figure 2.10. Dustproof Layer.
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