Engineers Design Tornado Proof Home 189
Hugh Pickens DOT Com writes "Emily Badger writes at the Atlantic that it's not too hard to build a tornado proof home but it's pretty difficult to design one that's liveable. "If you made a perfect earthquake structure, it would be a bunker with 24-inch walls and one small steel door for you to get in," says architect Michael Willis. That structure would be based on the empirical measurements of structural engineers. "You could design it to be perfectly resistant. But it would not be a place you'd want to live." The task behind the "Designing Recovery" competition (PDF): was to design a liveable tornado proof home in a part of the country where the geology makes it impossible to build tornado cellars or basements. Q4 Architects designed a safe space within a home instead of a shelter underneath it, a kind of house inside of a house. The result is an idea that could be replicated anywhere in tornado alley: a highly indestructible 600 square-foot core of concrete masonry, hurricane shutters and tornado doors where a family could survive a tornado and live beyond it, with several more flexible (and affordable) rooms wrapped around it. "It's going to do it's best to fight the tornado," says Elizabeth George." "Part of your house might get torn away, but the most important parts of the house are safe. After the disaster, everything is not lost. You're able to keep the most valuable things, which are the people, the functions of the house, and maybe your valuables." The genius of this idea is that while it would be significantly more expensive to build out the same tornado precautions for the entire home, the CORE house is meant to be constructed for under $50,000."
Re:Holy stupid ideas, batman (Score:5, Informative)
FEMA has instructions on how to build a safe-room into your home..
http://www.fema.gov/safe-rooms [fema.gov]
It's been up for years, and the instructions are clear enough for a do-it-yourselfer to do, or to hand off to a contractor to build.
How big you make the room(s) is up to you. If you're in a tornado area, it wouldn't be a bad idea to make effectively a studio apartment. That could be a bedroom, bathroom, and kitchen pantry. That way, if your house was completely blown away, you'd still have somewhere to live.
If you can afford a $50k room for something statistically rare, you can make a nice home theater (aka "man cave"). A theater room is better without windows, and soundproof from the rest of the house. With independent emergency power, you could camp out in it, and watch movies through the apocalypse, and come out sometime after its done.
We've been discussing making our safe room here. Unfortunately, most of Florida is not only a tornado risk, but a flood zone. You get both risks during hurricanes. So you may be in the totally safe shelter room from the house falling down around you, but if your exits are blocked, you may end up drowning in the same room.
Re:Bad idea. (Score:5, Informative)
For hurricanes and floodings, which could devastate large areas in a single event, I see your point. However, a single tornado usually impacts only a small area. The probability of an individual house in Tornado Alley being struck by an F4 or F5 tornado seems to be 10^(-7) per year [flame.org]. Economically, it makes more sense to insure the risk than to build an F4-tornado-proof house. I couldn't find probabilities for F3 tornadoes, but I could imagine that a similar argument holds there.