Dome-roofed shelter can withstand 300 mph winds

A 63-foot-wide tornado shelter in Missouri boasts an inflatable, 1/4-inch-thick plastic roof membrane that acts as a dome. It sits atop several inches of insulating foam, four inches of concrete and steel reinforcement. The circular design of the structure is said to be safer in tornadoes since wind goes around the building's surfaces.

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Springfield News-Leader (Mo.) (tiered subscription model)

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