Even the smallest tornado can rip objects into the air turning them into projectiles.
They were called fallout shelters in the 1950's and 1960's, underground shelters to provide a level of protection to individuals from tornadoes, sudden storms and the dreaded nuclear menace. These days storm shelters, or 'safe rooms' have come back into vogue as protection from some of the same fears. Many storm shelters are built by individuals or families, some are from kits that are installed on site. Regardless of which option you choose, a storm shelter can be a wise investment. Does this Spark an idea?
Instructions
1. A collapsed roof can keep you trapped in your shelter for days.
Choose an appropriate location for the shelter.
If it is located too close to the house, a collapsed roof can leave you trapped in your shelter for days. If it is too close to a tree you face the same problem. By the same token, it should be close enough to get to without delay. The location should be of sufficient size for the structure you intend building.
2. Check with local building ordinances.
Cities and towns have greatly varying restrictions on underground shelters. Some will even require a licensed contractor to complete the work. Failure to get the right permits may end up with you having to remove a finished shelter and starting again.
3. Choose the type of shelter to build.
Many shelters come in an already assembled form that greatly reduces the effort and cost of creating the form that is necessary to complete the shelter. If you choose one of these prefabricated shelters, make sure it conforms to the area building codes.
4. Measure out the area required for your prefabricated shelter.
The hole will ideally be about one foot wider and deeper than the measurements of the shelter.
5. Gravel will help prevent the interior of your shelter from flooding.
Place a four inch layer of gravel at the bottom of the hole to allow for proper water drainage.
If you live in an area with a relatively high water table, you may end up bailing out your shelter regularly. If this is the case, install a sump pump to help prevent the flooding.
6. A septic tank company can lower your shelter into the hole safely.
Hire a septic tank company to use a crane to lower the shelter into place on top of the gravel.
Center the shelter so that there is a one foot space between the outer walls and the hole.
7. Complete the concrete ramp one section at a time.
Dig out a ramp leading to the front door of the shelter using a bobcat excavator.
You have the option of building steps as some do. However, a ramp will allow you to move large objects in and out of the shelter easily. Create a form for the ramp using 2 by 4 inch support beams and concrete netting. It's usually best to have a professional concrete company do pouring at an angle, but it is possible to do it yourself. Pour the bottom portion first and let it cure overnight. Move up section by section until the top of the ramp meets level ground.
8. Cover the top of the shelter with the dirt that was removed from the hole.
The use of an earthmover will help you do this faster. Flatten the earth and plant sod on the top.
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