Because the Survival of your loved ones is your highest priorityUnderground Bunkers come in many different styles and designs. Underground Shelters USA builds and designs both steel and concrete bunkers. During your search, you may also find bunkers made from storage containers, concrete, fiberglass and even dirt and wood. Choose carefully, as your life may depend upon your choice.
Important Shelter Design Requirements for Underground Bunkers:Before purchasing an underground bunker, do a careful 'risk assessment' for your location and design your bunker accordingly. Your assessment of the risk, however, may change due to unforeseen circumstances. We would suggest that you choose a bunker design that covers a full array of hazards. We call this type of bunker 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; EMP, wild fires; and air contamination from fallout and chemical and biological war gasses. It is interesting to note that underground shelters designed for nuclear survival satisfy the entire scope of requirements for 'All Hazard Shelters™', and the cost of purchasing this type of shelter is a small percentage more than purchasing a shelter that is limited in its capabilities.
If you choose to purchase an 'All Hazard Shelter', ask the provider if the shelter design meets the following criteria.
Does the bunker provide critical radiation attenuation properties?
- 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 bunker 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 bunker 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 from 45 psi 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. Learn about Weapons Effects.
- 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.
Utah Shelter Systems can proudly claim an affirmative answer to all of the above requirements.
Contact us for all your shelter needs.
Contact us for all your shelter needs.