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Page 1 of 12  SP6 Bomb Shelter
Bomb Shelter Drawings: The SP6 underground disaster shelter
Bomb Shelter Photos: The SP6 underground bomb shelter
For more information about the Radius Engineering Nuclear, Biological and Chemical terrorism-protection underground shelter systems please contact Walton McCarthy here
 The SP6 contains a battery bank power supply Design
The SP6 is a third generation disaster shelter designed and developed by Walton W. McCarthy, M.E., author of PRINCIPLES of PROTECTION, U.S. Handbook of NBC Weapon Fundamentals and Shelter Engineering Standards, Fifth Edition 2002 which is the United State's bible on shelter engineering. He is the principle engineer of Radius Engineering Inc., with over 25 years experience designing "high- tech" disaster shelters. The book is distributed by The American Civil Defense Association (TACDA) in Starke, Florida, and is known in the industry as P.O.P.
The SP6 was designed using CAD (computer aided drafting), CAE (computer aided engineering), and FEAM (3-dimensional finite element analysis and modeling). The paraboloid shape of the SP6 allows it to be a true pressure vessel for resistance to high external pressure and full height water tables. The SP6 shelter system is based on 14 years field experience with McCarthy's successful TBC6, ES10 and larger sisters, P6 and P10 fiberglass underground shelters. The hatch at ground level of the SP6 is available in several different levels of threat resistance.
Shelter Construction
The paraboloid shelter and entranceway are made of structural fiberglass manufactured to underground storage tank standards of Underwriters Laboratory, American Society of Testing and Materials, and shelter engineering standards of PRINCIPLES of PROTECTION. Fiberglass was chosen as the optimum material because of its extremely high resiliency and corrosion resistance plus its ability to be shaped into a compound curved structure. The 15 psi (pounds per square inch) external pressure resistance, with no earth arching, is constant over 100 years and does not have to be de-rated each year like steel due to corrosion. Fiberglass also forms a complete vapor barrier which provides a dry atmosphere when placed below ground, and it has proven to be sound in the underground storage tank industries. In addition, one of the greatest characteristics of fiberglass is its ability to "remain intact" if overstressed. The inside of the shelter is smooth, curved, and white to create maximum brightness with minimal light. All of these facilities function without outside electricity through the use of 12-volt, deep-cycle sealed batteries. The inside surface is easily cleaned with common detergents and is easily repaired.
For more information about the Radius Engineering Nuclear, Biological and Chemical terrorism-protection underground shelter systems please contact Walton McCarthy here
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