Civil engineer guide to fighting positions, shelters, obstacles

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AFH 10-222 Volume 14 1 August 2008 82 4.4.5. Earth-Filled Obstacles. Field expedient methods for constructing obstacles such as log cribs can be very effective and necessary, particularly when a unit is on the move or simply does not have access to other types of materials. However, these methods can be labor-intensive and timeconsuming. If available, prefabricated materials can also be filled with earth and used as obstacles. Examples of some prefabricated objects that can be used along with sand, soil, rocks, or other natural materials include wire mesh containers, sandbags, and 55-gallon drums (Figure 4.10). If available, they can be earth-filled and used as obstacles for various purposes (i.e., block roads and entry points, establish standoff, reinforce perimeters, control vehicle traffic, etc.). In an austere environment, individuals are limited only by their imagination in how readily available fill material can be used in conjunction with prefabricated structures and materials to construct effective obstacles. In addition, some of the same structures and materials that can be used to create obstacles can also be stacked and used as revetments, which will be covered in Chapter 5. Figure 4.10. Earth-Filled Obstacles.
AFH 10-222 Volume 14 1 August 2008 83 4.4.6. Urban Rubble. In the urban environment, large chunks of concrete, junked vehicles, and damaged equipment are a few examples of items that can be used as obstacles (Figure 4.11). Built-up areas can naturally restrict movement due to the amount of existing structures. These areas are normally not used to beddown personnel deployed to overseas locations. However, they may exist nearby and could be used as a staging area for enemy forces to attack the base. Security personnel may use these areas as part of the base defense. The use of urban rubble as obstacles can be further enhanced by cratering streets, demolishing walls, and overturning or derailing heavy vehicles or railroad cars. Roadblocks can be built from rubble or construction materials. Barbed wire can be used to surround urban rubble for increased effectiveness as obstacles. In this environment, personnel are only limited by their imagination. Figure 4.11. Urban Rubble.
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Civil engineer guide to fighting positions, shelters, obstacles

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