Utah Shelter Systems - Because Survival Is The Highest Priority

About Our NBC Shelters


© 1987 - 2014 Utah Shelters Inc. All rights reserved.



There are essential design elements you should consider before purchasing an "All Hazard Shelter™".

‘All Hazard Shelters’ must withstand violent earth movement from severe earthquakes; high velocity winds from tornados and hurricanes; invasion from mobs; heavy overpressures from nuclear blast; all types of radiation; wild fires; and air contamination from fallout and chemical and biological war gasses.   It is interesting to note that NBC shelters satisfy the entire scope of requirements for 'All Hazard Shelters™'.

Before purchasing a shelter, do a careful 'risk assessment' for your location (see 'getting started'), and design your shelter accordingly.

If you choose to purchase an 'All Hazard Shelter™', your shelter design must meet the following criteria:

  • Does the shelter provide critical radiation attenuation properties for NBC shelters?
    • Small diameter entrances.
    • Entrances with both vertical and long horizontal components connected with a 90-degree turn, assuring the proper attenuation of gamma radiation.
    • Long horizontal runs providing an area in the entrance for the required 6 feet of shielding assuring protection from initial radiation.
    • Shielding over the shelter chamber equivalent to 4 feet of dirt cover for gamma radiation, and at least 8 feet of dirt cover in blast areas, for shielding against initial radiation.

  • Is the shelter constructed of a material and geometry that will provide proper blast and earthquake protection?
    • Proper depth of cover for MAXIMUM blast protection (depth of overhead cover equal to the diameter of the shelter) assuring blast protection from overpressures to 200 psi.
    • Proper depth of cover to achieve stable and comfortable interior air temperatures, assuring survival from extreme weather conditions.
    • Arched ceilings that will provide ‘Earth arching’, assuring protection from catastrophic failures associated with soil burdens and high blast overpressures.
    • Construction material that will MOVE and BEND with earth motion, assuring protection from catastrophic failure associated with earthquakes and ground shock from nuclear blasts.

    • Interior storage of primary water supplies and septic systems (no water or septic tanks at or near ground level), assuring protection from ground slap associated with nuclear blast .
    • Steel air pipes and doors, assuring protection from wild fires, thermal pulse, high winds & flying objects.
    • Blast valves for all penetrations (Air pipes, Exhausts, Wiring, Antennas, etc.) assuring blast protection and continual positive air pressure in the event of chemical or biological attack.

  • Does the shelter provide adequate ventilation and air filtration capabilities?
    • Both electrical and manual (backup) functionality, assuring continual air supply in long term power failures.
    • Adequately sized air vents (4” – 6” diameter), assuring adequate supply of air and temperature control.
    • Metered air volume, assuring critical residence time within the high efficiency particulate (HEPA) filter when processing chemical and biological war gasses.
    • Pre-filters placed in line prior to processing of NBC contaminates, assuring protection of the HEPA filter from contaminates such as smoke, dirt, insects and larger radioactive particles.
    • Ventilation and air filtration systems that have been tested and documented by a nationally recognized facility, assuring proper filter densities, air volumes, metering devices, blast protection, thickness of hose materials and metals and interior paints of the gas canister.

  • Can this shelter be customized to your needs (localized threat, water tightness, size, depth of cover, interior furnishings)?
    • Customized entrances and floor plans suited to your personal needs and desires.
    • Handicap entrances where needed.
    • Ample interior room for the storage of food, water and other supplies.
    • Sufficient volume to 'shut down' air supplies for 5 hours, during fires.

  • Has this shelter design been tested and approved by the Federal Government?
    • Will the manufacturer provide documentation of tests?


© 1987 - 2014 Utah Shelters Inc. All rights reserved.