![]() To be effective, you need the walls of your bunker to be between one and three feet thick, which is going to increase your costs significantly. You can create your own steel bunker using a 48” culvert pipe, but you’ll need a high-quality product if it’s to withstand the weight of the earth you put on top to conceal the bunker.Ī concrete underground bunker offers excellent protection against radiation, fire, and explosive shockwaves. Unfortunately, prices have changed a bit since 1962 and what would have once cost “$150 or less” will now cost around 10 times more. This design uses a pre-fabricated steel culvert, a little like those manufactured by Atlas Survival Shelters. Read more about how to find your nearest fallout shelter. It’s designed to accommodate three people, but at a stretch, could house a family of four for at least a couple of days. This shelter provides “fallout protection” against any radiation following a nuclear attack and is fire resistant. In its entirety, the document contains eight different types of shelter, each of which was designed “for use by families who do not have access to community shelters.” ![]() This plan for an underground steel bomb shelter dates back to 1962 and was created by the US Department of Defense. #3 Below Ground Corrugated Steel Culvert Shelter With a little imagination, you can convert a basic root cellar into an underground or backyard bunker that offers a safe retreat when disaster strikes. You can also find some useful root cellar plans here. Our previous article on root cellars gives lots of useful planning advice and explores the pros and cons of various designs. It’s not only fruit and vegetables that can prosper in a root cellar – humans can also survive down there for months at a time. You can also install a basic plumbing system and lighting to make your underground experience more comfortable. To make the bunker safe, you need to add insulation and ventilation, but both these steps can be completed relatively easily using polystyrene insulation panels and 12v computer fans. While you’ll struggle to transform a septic tank into luxury underground accommodation, you can make it safe and survivable. To give you a clearer idea, this 8’ x 12’ mini bunker carries a price tag of $45,500! The average cost of a 1500-gallon pre-cast concrete septic tank is approximately $1,590, which is a lot cheaper than the average underground bunker. ![]() To make an underground bunker using a concrete septic tank, you can either order a pre-cast tank from a reputable manufacturer or build your own. As you need around 10 square feet per person, this would give you a bunker big enough to house up to six people. The most popular 1,500-gallon septic tank measures around six feet wide by 10 feet wide, giving you approximately 60 square feet of floor space. If your septic tank is already trapping and filtering your toilet waste, you can’t go and live in it, but you could install another one as your purpose-built backyard bunker. Underground Bunker Plans #1 Septic Tank DesignĪ concrete septic tank makes a sturdy base for a basic underground shelter and is cheap and comparatively quick to install.Īround 20% of all the homes in the US already have a septic tank installed, but that doesn’t help. There aren’t a lot of underground bunker plans available for free, but you can get some useful ideas from companies manufacturing bunkers or using the plans for old bomb shelters and root cellars as a basis for your design. Designing and building your own is a cheaper option and one you can achieve relatively easily, provided you can come up with some viable plans. As climate change and global unrest promise more local and global catastrophes so, more people are considering having a subterranean world to escape to.Īlthough you can buy ready-made underground bunkers, these are often prohibitively expensive.
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