Panels for a new high-tech shelter created at the University of Alabama at Birmingham have passed the National Association's test. In the NSSA test, 15-pound two-by-fours fired from a pressure cannon were unable to penetrate the panels, made of recycled materials, in a dozen attempts. The wooden missiles hit the panels at 100 mph, the speed at which typically exit a tornado spinning at more than 200 mph. Such a storm would rate EF5 on the Enhanced Fujita scale and be capable of leveling well-built homes.

Source: Researchers successfully test advanced tornado and hurricane shelter panels (Youtube).

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