Safe Rooms: Construction StandardsSafe rooms vary in style and construction materials. There are isolated concrete forms, steel and plywood construction, steel construction, and manufactured units. Many builders use plans and specifications for constructing safe rooms from FEMA’s publication 320, “Taking Shelter from the Storm.”
Texas Tech University is the primary testing facility for safe rooms, which should withstand 100 mph winds and be undamaged by falling or flying debris. The National Storm Shelter Association has set industry standards for safe room construction.
Your area Homebuilders Association can provide information on builders who construct safe rooms.