What is FEMA 320?
FEMA 320 is a directorate written by engineers working with the US Government to provide the minimum standards acceptable for construction of storm shelters in a residential structure. It is currently one of two guidelines that are used for tornado and hurricane shelters, the other is the NSSA. FEMA also published the 361 directorate that gives similar construction guidelines for community shelters. Details can be found at www.fema.gov.