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"This family is building a basement compact shelter of sand-filled concrete blocks. Solid concrete blocks are used for the roof shielding. This type of shelter also could be built of brick or structural tile.

"This backyard plywood shelter can be built partially above ground and mounded over with earth, or be built totally below ground level. A gravel drain under the shelter and a ditch outside help keep it dry. The family blocks the entrance with…

"This four-person basement-corner shelter is made of curved asbestos-cement sheets which are covered with sandbags. Materials cost about $125."