Finally, cutting away pieces of the shipping container to allow for access, venting, and customization further weakens the flimsy structure. Shipping containers have no such coating therefore, you will find rust, corrosion, mold, and other factors that will risk your safety. DEFCON also uses a special rubberized coating on the outside of its steel bunkers, this coating protects against environmental contaminants and corrosion. Once buried, the thin steel will become evident quickly as the roof will likely bow or collapse. First and foremost, the steel used for shipping containers is thin and weak in comparison to the steel that DEFCON uses for its bunkers. Shipping Containers are a Unsafe Bunker Design. Non-Durable Underground Shipping Container Bunker Aside from shipping containers, there are several other unsafe options as discussed below.Įverything you wanted to know about the durability of our underground bunker, emergency shelter and underground bomb shelter products can be found here. When the need arises, you want to know that your shelter will keep your family safe. Such containers are not made to withstand the underground, moist environment or provide long-term emergency shelter. A shipping/storage container under the ground is a potential death trap. You can’t just put a box into the ground and call it a bunker. Please make sure if you purchase a bunker elsewhere that it is engineered to a safe standard. All live loads, dead loads, and blast load are taken into account. All our shelters are 100% made from structural steel. Since 20 feet is a reasonable limit to excavate and redress, we will assume our design on that depth, other considerations are best left to experts.DEFCON only manufactures durable underground shelters that have been professionally engineered and use quality materials designed to last a generation. Bunker busters, on the other hand, can penetrate many feet (the exact distance, for obvious reasons, is classified), of reinforced concrete. A typical 500 pound bomb has a blast energy of about 10,000 feet per second using high explosives, and if fused for a ground burst or impact detonation, you will want a minimum of 15 feet of energy absorbing material between the ground and your structural roof. Decide what ordinance your structure will need to resist.Since bomb shelters typical are very temporary in nature unless a sustained bombardment is anticipated, you can expect to allow at least 72 square feet of space per person. How many people will it house? This will give you information needed to design the shelter in respect to size and accommodation.Basically, there are four things to keep in mind while designing your shelter. Building on stable, flat, well-drained land is the most direct approach to getting the job done, and that will be what we assume the reader plans to do.ĭetermine the critical factors to consider in your design.Building into the side of a mountain or steep hill is a good choice for people with the resources to do so, and without the depth requirements, the following steps are fairly typical of what needs to be done to successfully complete your bomb shelter project.Building in solid rock, unless you have a suitable cavern to use as a superstructure, will require blasting and drilling, which also will exceed the scope of this page.In areas with poor drainage or a high water table, the option of building deep will require more engineering than this page will offer. Soft soil can offer only limited resistance to bomb energy, so building in soft soil requires a deep excavation with highly reinforced construction.
Develop a site plan for the location you plan on building your bomb shelter at.
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