Florida FEMA specs. state 200mph max wind load. Because of the shelters design of a hexagon design shape the wind load is greatly deflected by the angle of the sides and ends. (FEMA's wind load specs are for flat surfaces) The 29,000 pounds plus, per square inch of tensile yield strength of the material is much greater that the wind load spec. of 252# per sq foot for 5 seconds.
Please visit this link to view all of the FEMA 361 specs. http://www.fema.gov/fima/fema361.shtm
MISSILE TEST SPEC.