Bomb shelters you can buy now, from Popular Mechanics.
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Here's a company based in Texas:Home:
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They've got several offerings. The smallest can withstand a 10KT nuclear air blast and protect ten people for a really long time. Here's the basic model:Drawing:
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Full specs:
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Some features: Air blower life ............................................................ 60,000 hours (continuous 2,500 days) Air blower type ..........................................................8-in dia. Reverse curve centrifugal 12-V, 7.5 watt Air blower volume .....................................................
40cfm @ 1 in S.P. Air filter ...................................................................... HEPA
99.99% @ .3 u Antenna Fittings .........................................................
1.5 in and 1 inch NPTF accessible internally Assembly time ............................................................
1 man-hour Backfill material required .......................................... gravel or ¾- in. crushed stone (160 yards) Batteries.....................................................................
18-130 amp hour deep cycle marine Capacity-adults ...........................................................
10 Connector port to other shelters ................................. 36-inch diameter with cap Duration-blower + light 24hr/day - 6 adults .............. 30 days Emergency escape ..................................................... hydraulic cylinder 14,000 lb force@2000 psi Entranceway diameter ................................................
48inch Excavated hole size .................................................... 14 ft. x 30 ft. x 19 ft. deep (296+ yds) Fire resistance............................................................. ASTM E-119 1 hr @ 1700 F. mechanical Floor .......................................................................... Fiberglass fixed Floor material ............................................................. molded structural fiberglass Floor space ................................................................. 152 ft Hatch cover ................................................................
48 x 64 in. Hatch dome -angle of incidence ................................ 30 degrees Hatch dome material .................................................. Combat Composite Hatch exterior lock .....................................................remote transmitter Hatch interior latch ..................................................... remote transmitter Hatch manhole .......................................................... 28 x 40 inch Hatch pressure resistance ........................................... 40 psi positive, 5 psi negative Head room ..................................................................
7'-4" to 9'-4" Hull material............................................................... structural fiberglass HEPA Filter ................................................................
60 cfm, 99.99% @ 0.3u Hydrostatic pressure (buoyancy) ................................ 107,550 lbs Implosion type ............................................................ non-catastrophic Installation time ..........................................................
2 days Interior color............................................................... white, flame spread of 25-50 Type II, ASTM E84 Lighting ...................................................................... 6 element white LED (2) 12 volt Max .wind ..................................................................
150 -350 mph class 0-IV Overpressure - allowable ........................................... 40 psi with no earth-arching effect Protection Factor Gamma .......................................... 131,072 @
93.5 inches of earth Protection Factor Neutron ..........................................
1,048,576 @ 94 inches of earth