Civil engineer guide to fighting positions, shelters, obstacles

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AFH 10-222 Volume 14 1 August 2008 62 3.3.2. ISO Bunkers. ISO bunkers are constructed using ISO containers hardened with earth-filled protective barriers (Figure 3.7). The following paragraphs briefly describe construction of an ISO bunker. There are several different types of bunkers that can be constructed using earth-filled containers. For additional information on ISO bunkers and other types of bunkers that can be constructed using ISO containers, refer to the manufacturer’s instructions and TCMS. The next few paragraphs describe construction of an aboveground 20-foot ISO bunker. NOTE: When building these types of bunkers, keep in mind the ISO containers cannot be load-bearing structures. Steel framing or other structural support approved by an engineer with experience in structural analysis must be used to support the top cover. Before attempting to construct this bunker, planners must ensure the resources are available to complete all phases of the project. These resources include bunker kits; heavy equipment such as bulldozers, vibratory rollers, dump trucks, cranes, forklifts, and front-end loaders; and technical guidance. Once a site is selected, follow the guidance in Chapter 2 for site selection and preparation. Construction can begin once planners are satisfied all resource requirements have been met. Figure 3.7. ISO Bunker. Earth-Filled Containers ISO Container
AFH 10-222 Volume 14 1 August 2008 63 3.3.2.1. First Layer. The first layer of wire mesh containers for the ISO bunker requires three sections of containers equal to nine bays. Begin by collapsing one of the nine-bay sections to make a section that is eight bays long. Next, break down another nine-bay section into two units with four bays each. Align the bays as illustrated in Figure 3.8, ensuring the flaps at the bottom of the units are folded out. Once the layout is complete, begin filling the units in 9-inch lifts (approximately). Start from the center of the bays and fill the bays in a uniform manner, ensuring some bays are not being filled faster than others. Lightly compact the fill material after each lift using manual hand tampers or by foot – do not use compacting equipment for this purpose. Continue this process until all bays are filled. Compact the last layer in preparation to construct the second layer of the ISO bunker. For more guidance on infill procedures, refer to Chapter 2, the manufacturer’s instructions, or TCMS. Figure 3.8. First Layer – ISO Bunker.
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Civil engineer guide to fighting positions, shelters, obstacles

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