Civil engineer guide to fighting positions, shelters, obstacles

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AFH 10-222 Volume 14 1 August 2008 88 4.5. Prefabricated Obstacles. The remainder of this chapter focuses on those obstacles that are usually prefabricated and moved into place as needed, and those obstacles that are not usually considered expedient due to the time and materials needed for construction. 4.5.1. Chain Link Fencing. Chain link fencing can be used to form a continuous obstacle around a site. Although they are considered obstacles to pedestrian traffic, fences are not very effective unless reinforced using cables or other methods to prevent them from being easily breached. This can be accomplished with cable at least ¾-inch in diameter. The cable is strung at 30 inches and 35 inches above the ground (Figure 4.15). Fences can also be used in conjunction with other security measures such as berms, earth-filled containers, surveillance cameras, motion detectors, etc. Once constructed, they should be inspected frequently to detect evidence of breaches and to ensure any maintenance needed is identified. For additional details on designing security fencing, reference MIL-HDBK-1013/10, Design Guidelines for Security Fencing, Gates, Barriers, and Guard Facilities (will be republished as UFC 4-022-03). If it is determined that fence construction should be accomplished via local contract, the specifications in UFGS-32 31 00.00 10, UFGS-32 31 13.00 20, and UFGS-32 31 13.00 40 can be used in developing the contract Performance Work Statement (PWS). This document, along with any other UFGS documents, can be downloaded from the Whole Building Design Guide (WBDG) website at http://www.wbdg.org. Figure 4.15. Fence Reinforced With Cable.
AFH 10-222 Volume 14 1 August 2008 89 4.5.2. Obscuration Screens. Perimeter obscuration screens are used to block direct lines of sight to sensitive areas or facilities from outside the perimeter of a site in an effort to reduce targeting opportunities from direct-fire weapons. This can be done in various ways using trees, dense vegetation, chain link fences with slats, wooden fences, camouflage netting, etc. Obscuration screens are not usually designed or constructed to provide protection against direct fire. If installed around facilities, place obscuration screens on the side(s) facing the site’s perimeter to reduce exposure. Obscuration screens can also be placed on perimeter fences to block lines of sight into the camp area (Figure 4.16). When using obscuration screens on fences, make sure personnel inside the site or facility are still able to see outside and observe any suspicious activities. Figure 4.16. Obscuration Screen on Perimeter Fence.
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Civil engineer guide to fighting positions, shelters, obstacles

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