Fallout Shelters

Fallout shelters are not necessarily blast shelters and are not usually designed to protect against all weapons effects. They are designed to protect shelter occupants against gamma radiation associated with fallout. Gamma radiation is the most far reaching of any of the weapons effects. Utah Shelter Systems does not build shelters to only a fallout shelter standard, unless specifically requested to do so. Steel fallout shelters if designed to only a fallout standard, must have a minimum of 4 feet of dirt cover over the shelter body. Please note, however, that prompt gammas, are not associated with fallout and the shielding material for prompt gammas is of a different type.

Small concrete shelters have the following design requirements (always consult a civil engineer, as your shelter size may not meet these requirements):

Shelter Type

Ceiling Thickness
15 psi

Wall Thickness
15 psi

Ceiling Thickness
45 psi

Wall Thickness
45 psi

Above ground Shelters
31"
22"
48"
34"
Below ground Shelters
22"
10"
34"
10"
Basement Shelter with building overhead
14"
10"
22"
10"
Basement Shelter with interior walls
14"
20"
22"
26"
Basement Shelter with outside exposed wall
14"
32"
22"
48"

All nuclear bomb shelters built by Utah Shelter Systems are carefully engineered against fallout and all other nuclear weapons effects.
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