Underground bunkers became extremely popular during the Cold War era. Today, a backyard bunker can still be a valuable asset for protecting your family from unforeseen dangers. To ensure your underground shelter is effective, cover it with at least 2 feet of dirt. This layer of earth will protect against gamma radiation in the event of a nuclear attack. Remember, the deeper the bunker, the better.

Air quality can deteriorate quickly underground, so invest in a good air exchanger and filtration system. Ensure that the door opens inward so you can exit if something falls and blocks the door. Additionally, having a second emergency exit is recommended.

Shipping Container Shelter

Shipping containers, available in various sizes (e.g., 20ft and 40ft), can be repurposed into effective shelters. Many large companies sell used containers at discounted prices. Reinforcement is crucial as containers are designed to bear loads on their corners, not on their tops or sides. For a larger shelter, combine several containers to house more people and provide additional storage.

1. Dig a hole at least 2 feet deeper than the height of the shipping container.
2. Pour concrete stairs leading down to the bunker.
3. Use I-beams to support the entryway roof.
4. Place corrugated steel across the top of the container as a base for the concrete roof.
5. Weld a rebar frame around the stairs.
6. Add blocks to the rebar and fill with concrete.
7. Install air vents and PVC pipes for utilities.
8. Pour a 6-inch layer of concrete over the top to insulate and strengthen the roof.
9. Backfill with topsoil to plant grass and bushes, camouflaging the bunker.
10. Add food storage, bunk beds, and a gun rack if desired.

Tube Survival Shelter

Tube shelters require less reinforcement as they are designed to handle loads on the sides, similar to a submarine. Atlas Survival Shelters offers premade bunkers made from 12-foot diameter galvanized corrugated pipes. These shelters are 11 times stronger than square designs and can last up to 200 years underground. They can even be buried up to 42 feet below the Earth's surface. Here are some tips for building your own tube bunker:

1. Build a frame for the floor using 2x4s, allowing for 3 feet of storage.
2. Add plywood over the frame to create a level floor.
3. Cut holes and add doors in the plywood for access to underfloor storage.
4. Add bunk beds and other comforts of home.
5. Dig a hole large enough to fit the pipe at the desired depth.
6. Place the pipe in the hole.
7. Weld a smaller pipe to the outer door area and add an access ladder to the surface.
8. Connect water and utilities.
9. Install a generator and air filter.
10. Weld an additional small pipe at the back for an emergency exit.