![]() Set the door frame into this opening and bolt it to the foundation using concrete anchors or screws. Measure the width of the door frame you will be placing in the shelter and mark that area on the foundation with a snap line or carpenter's chalk. Building the Shelter Step 1Ĭhoose one side of the foundation that will serve as the front of the shelter. You'll need several tons of concrete for this project without access to a large mixer, doing this portion by yourself would take a very long time. ![]() Make it clear, when you do, that the foundation will be for a storm shelter as that will require different lengths and amounts of rebar reinforcement. (see Reference 6)Ĭontact a professional to frame and build the foundation and pour the concrete. According to FEMA recommendations, you should plan for five square feet of floor space for each person in a tornado shelter and twenty square feet for a hurricane shelter, with added allowances for any occupants who may be wheelchair-bound or bedridden. The point in the center of the structure where each of the corners meets should be the exact middle of the shelter: Place a small stake in that spot as well. The distance between each of the opposite corners should be the same. Tie a carpenter's string to each of those stakes and stretch across the length between them. ![]() Measure the space needed for the shelter using tape measures, and drive a small wooden stake into each of the four corners, making sure the area is level by measuring between the stakes on opposite corners. Look for trees in neighboring yards that may fall on top of the shelter, and avoid those areas. You don't want the shelter to be in the path of a felled tree or to be rendered a prison if the house should collapse onto it. Examine the layout of the area in which you want to put this shelter. ![]()
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