![]() ![]() If you purchase these poles, instead of chopping them down yourself, you're looking at an average cost of about $20 per log, or $400 for 20 logs. The poles should over-hang the edges by at least a foot in order to help support the soil on top. Step 4: Once you've dug your trench, lay your wooden poles over top of it. A basic 3-by-11 foot waterproof tarp should run you between $20-$40. Step 3: When completed, place waterproof material over each end of the shelter to form an overhead canopy - this should keep your shelter dry as well as catch any dropping fallout. It should be about two feet wide by three and a half feet deep - it's basically a crawl space and can double as an emergency exit for smaller individuals. ![]() Dig this trench just under the ground's surface with an opening to the surface at the end of it. the effects of radioactive fallout in the belowgrade. At the other end of the trench, dig a five-foot-long ventilation trench to help circulate air. In building any of the shelters, modifications may have to be made to sult local building codes. Pour concrete stairs leading down to the bunker. Step 2: Next, dig a five-foot-long entrance with steps or a slope down into the main area. Dig a hole a least 2 feet deeper than the height of the shipping container. Account icon An icon in the shape of a person's head and shoulders.
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