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Off The Grid™ Survival Bunkers by SAS

The Survive-a-Storm Off The Grid™ Underground Survival Bunker is a versatile, practical, and economical underground survival bunker. These underground survival bunkers are available starting $19,995 and, with an innovative modular design, can be configured in a nearly unlimited number of length and width configurations.

SAS customers range from security conscious customers to Fortune 500 companies to the United States Military. That’s right! The United States Armed Forces utilize the same bunkers that we market and sell directly to the public. Our affordable underground bunkers simply keep your family, friends and loved ones safe in case of an emergency situation.

No matter what size you need, or how many people you wish to protect, we’ve got the under ground bunker for you.


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6-Wide Off The Grid Bunker Specs

Available Underground Bunker Dimensions

  • 6-Feet Wide x 20-Feet Long (Standard Cost is $19,995 and does not include delivery or installation prices.  Please call for your personalized quote today!)

Standard Survival Bunker Structural Specifications

  • Streamlined and stealth installation-all records are sealed and installation is absolutely confidential and delivered with company-owned trucks
  • Shelter is buried 1-foot deep
  • 10-Gauge half octagonal design
  • Structural angle and channel reinforcements
  • Sherwin Williams epoxy powder coating, for maximum corrosion resistance.
  • Sacrificial cathodic anodes buried with bunker for extended life
  • 6′ wide x 6′ tall x 20′ long with two bulkheads

Bunker Door Specifications

  • Triple locking gasketed system with dual rods and paddle lock.  Exit allowed even if exterior is locked.
  • Ergonomical 45 degree entry system with staircase for Nuclear and ballistic protection
  • Secondary emergency escape hatch with ladder
  • 6,000 pound emergency jack on main entrance

Bunker Electrical Wiring

  • DC Battery-Powered lighting in every room of the bunker

Interior Features

  • Four bunk beds **“22 1/2 “ mattress not included”**
  • Shelves and storage lockers per plan
  • Carpeted floor

12-Foot Wide Off The Grid Bunker Specs

Available Underground Bunker Dimensions

  • 12-Feet Wide x 20-Feet Long  (Standard Cost is $59,995 and does not include delivery or installation prices.  Please call for your personalized quote today!)
  • 12-Feet Wide x 40-Feet Long  (Standard Cost is $89,995 and does not include delivery or installation prices.  Please call for your personalized quote today!)
  • 12-Feet Wide x Custom Length and Custom Number of 12-Foot Wide Modules

Standard Survival Bunker Structural Specifications

  • Streamlined and stealth installation-all records are sealed and installation is absolutely confidential and delivered with company-owned trucks
  • Shelter is buried 3-Feet deep
  • 1/4″ Steel rectangular tank-twice as thick as other offerings
  • Structural channel and tubular exoskeleton 24″ on center Sher-tar coal tar expoxy coating for cathodic protection-applied at 30 wet mills
  • Sacrificial cathodic anodes buried with bunker for extended life
  • Sher-tar coal tar expoxy coating for cathodic protection-applied at 30 wet mills
  • 12′ wide design-20% larger than square offerings and 50% larger than pipe offerings

Bunker Door Specifications

  • Triple locking gasketed system with dual rods and paddle lock.  Exit allowed even if exterior is locked.
  • Ergonomical 45 degree entry system with staircase and double door entry for Nuclear and ballistic protection
  • Secondary door at main entrance with sliding gun port
  • Hidden emergency escape tunnel system positioned in hidden room at 45 degree angle with 1/4″ door
  • Both entrances and ventilation hidden under resin rock
  • 6,000 pound emergency jack on main entrance

Air Filtration System

  • NBC (nuclear, biological, chemical) filtration system-60 CFM filtered and 235 CFM unfiltered with HEPA filter, 4″ hidden intake and exhaust, adjustable overpressure valve, emergency hand crank and 101 PSI blast valve.
  • Valve is lockable to ensure waterproofing and air proofing.

Plumbing & Electrical Systems

  • 250 Gallon potable water tank
  • Shurflo 1 GPM 60 PSI on-demand potable water pump
  • Nature’s Head composting toilet with 12 volt exhaust fan
  • Double bowl stainless kitchen sink
  • Porcelain lavatory with undersink storage
  • 36″ corner shower with walls and door
  • 12 volt lights in each room110 volt receptacles in each room
  • Twin 255 watt solar panels with mount
  • Xantrex 1800 charging hub with four 100 Amp Hour deep cycle batteries
  • Parallax 30 amp 110 volt/12 volt distribution panel
  • Marine Air Origo 3000 alcohol cooktop with 6,800 BTU burners
  • 3.5 cubic foot Energystar mini refrigerator2.5 gallon point of use water heater for shower
  • FLIR camera system with automatic notifications
  • 50″ Hitachi 1080 LED TV

Interior Features

  • 12×40 sleeps up to ten people and 12×20 sleeps up to four people
  • Best in class 96″ head height
  • Sectional sofa (83″ x 68″) neutal color
  • Residential cabinets with overhead cabinets
  • Hidden storage room with bookcase providing access to gun and food lockers and mechanical area
  • Queen bed with hinged storage compartment beneath
  • Four bunkbeds with storage beneath each bed
  • Shelves for 12 months of food storage
  • Carpeted interiorFour relocatable dining tables
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