Civil engineer guide to fighting positions, shelters, obstacles

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AFH 10-222 Volume 14 1 August 2008 74 4.4.2. Log Obstacles. During initial beddown, logs can be used to construct different types of obstacles and expedient barriers. The following paragraphs describe some of the different ways logs can be used to restrict movement around and throughout a deployed location. These are considered temporary measures. Once contingency operations begin to stabilize and material and equipment are more readily available (locally or through supply channels), these types of barriers should be complemented or replaced with more effective means of impeding, blocking, or disrupting movement. Some of these methods will be covered later in this chapter. 4.4.2.1. Log or Lumber Wall. A log wall, as illustrated in Figure 4.3, can be constructed to block access to certain areas or to protect critical assets. This type of barrier construction consists of short sections of 4- to 6-inch logs or lumber stacked together between posts of the same size as the wall sections. The posts are fastened together at the top and further held in place by guy wires or ropes fastened to stakes. Several 10- to 12-foot wall sections should be constructed toward the front of the position and placed in a staggered fashion rather than building one long wall which could be destroyed by a single detonation from enemy weapons. Figure 4.3. Log Wall.
AFH 10-222 Volume 14 1 August 2008 75 4.4.2.2. Log Hurdles. Log hurdles are used to form barriers approximately 18 inches high across a road. Individual logs may be as small as 10 inches in diameter if they are lashed or wired together and staked in place. Once log hurdles are wired together, stagger shorter logs (6- to 7-foot lengths) along the path in 10 to 12-foot segments, and place full width logs as illustrated in Figure 4.4. Hurdles can slow vehicles enough to allow security forces to engage an intruder or cause a vehicle to lose control. For more effectiveness, hurdles can be used in conjunction with other obstacles such as ditches and log cribs. Figure 4.4. Log Hurdles.
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Civil engineer guide to fighting positions, shelters, obstacles

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