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DIY garage floor storm shelter

Posted on 1/20/20 at 12:46 pm
Posted by AtticusOSullivan
Member since Mar 2016
3005 posts
Posted on 1/20/20 at 12:46 pm
Anyone ever install one of these yourself? Seems like you could rent a saw and a mini ex to cut out and remove slab section. Do you backfill in concrete around enclosure? If so what's that process like? Thinking of tackling this. Any tips are welcomed. Just had a tornado go through the neighborhood a week and a half ago and old lady is really on me to get one of these.
Posted by Cracker
in a box
Member since Nov 2009
19262 posts
Posted on 1/20/20 at 1:56 pm to
Build it somewhere else if your house caves in you many not be found for a while clearance to the ceiling will make excavation hell and it will take a while.
Pay someone to dig a hole in your yard
Posted by Carnifex
Member since Oct 2016
184 posts
Posted on 1/20/20 at 1:56 pm to
No experience with the below ground install per your question.

I had an above ground one installed by survive a shelter last year.

They manufacture one just like you are talking about.
Their prices include the install fee too.

I had looked at it, and those seem like you could get trapped in there very easily if you took a direct hit. Debris could be blocking the exit. (i know the larger ones have 2 entrance/exits)

The above ground ones they make are F5 rated and the door swings inwards if there is debris blocking the door. So you wont be as trapped. You could always crawl out of the rubble or get air and daylight with this solution.
Posted by AtticusOSullivan
Member since Mar 2016
3005 posts
Posted on 1/20/20 at 2:18 pm to
I originally was looking at the above ground steel ones. But the F5 rating I saw was based on 2x4's hitting it at certain wind speeds. 2x4s are one thing but a car is another. Getting tapped is obviously an issue with the garage one but you will be alive and I live an a populous neighborhood it wouldn't take long for someone to notice us. I also like that you don't have to go outside at 3 am when you hear the sirens.
Posted by OysterPoBoy
City of St. George
Member since Jul 2013
44726 posts
Posted on 1/20/20 at 2:33 pm to
quote:

Pay someone to dig a hole in your yard


That's a good plan but then you have to be willing to kill them so they don't come back to kill you and take your stuff when the world ends.
Posted by Carnifex
Member since Oct 2016
184 posts
Posted on 1/20/20 at 2:46 pm to
The one I have exceeds the nssa, icc-500, and fema 320/361 guidelines.
They have pics of those things still standing after the Joplin F5.

Mine is build inside the house so no need for going outside. If you had room you could also install it in the garage.

But totally, if you were really set on the below ground one, I’d def recommend survive a shelter as a rec. They have the one like you are talking about. They come out and do everything. Also, they have a service that calls you after a tornado warning is issued for your address to be sure you are ok. Sort of nice added feature. hope it helps you in your search!
Posted by NASA_ISS_Tiger
Huntsville, Al via Sulphur, LA
Member since Sep 2005
8242 posts
Posted on 1/20/20 at 4:17 pm to
I know in Alabama you can (maybe required to) register where your in ground shelter is. Like GPS coordinates blank is on the form. Also the ones they wanted to sell us with our house we bought have a hydraulic jack for the door and a back up jack. We didn't get one so I don't know the lifting capacity of the jacks. Entrapment was one reason I was concerned. However I also saw a benefit of in ground as far as doing oil changes while standing on the stairs headed down into the shelter.
Posted by CheEngineer
Louisiana
Member since Aug 2019
4234 posts
Posted on 1/20/20 at 4:52 pm to
Had a friend drop in concrete septic tank then build a small sheet metal shed over it to basically keep the water out of it and if it fell down he would be able to get out. It was cheap and sturdy never used it he was from Oklahoma so he felt he needed it.
Posted by gumbeaux
Member since Jun 2004
5325 posts
Posted on 1/22/20 at 6:55 am to
I thought about a below ground shelter in the garage when I built my house 4 years ago. But what are you going to do when a tornado is bearing down on you? Find the car keys and take the time to move the vehicle outside? Or if you park outside the garage, take the time to move all the junk that is blocking the access?
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