San Francisco : Architect and Engineer, Inc · leaf 50
This Armco iron air-raid shelter is 50 ft. long and 7A, ft. high and will accommodate 50 persons. Four unskilled work-men can erect the shelter with simple tools in a few hours. ARMCO AIR RAID SHELTER TYPE 90-A … joints with a special mastic An escape tunnel is pro-tected by a gas-tight hatch while a gas-tight steel doorguards the entrance. Occupants may leave through the 30-inch escapetunnel if debris blocks the entranceway. A canopyshields the door from falling debris while explosionwalls shield the…
Architecture · Building
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