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-   -   Building on existing 4" slab (http://www.diychatroom.com/f19/building-existing-4-slab-186911/)

workdog 09-12-2013 05:47 PM

Building on existing 4" slab
 
Hello to all first timer here!
I have an existing 10'X14 'floating cement slab only 4" thick though out, reinforced with wire, with some sand add for a base. I would like to build a shed/yard tractor garage the same size on it here in Michigan.
My questions are:
6" Blocking on top of slab around perimeter ? or
Dig around & under perimeter for more thickness & some sort of footing than place blocking on new pour at outer perimeter ?
There is a existing 10'x10' shed on the slab now with its own wood flooring that will be removed & I don't think there is any cracks in the slab.
I would like to think that just mortaring & using re-bar the 6" blocks on top around the perimeter would be fine for such a small build.
Any input would be helpful.

joecaption 09-12-2013 05:52 PM

Should be fine to just add the block on the slab for that small a building.
There's just no way to dig out for a proper footing once the slabs been pored.
Good Idea to add a row of block though to get the siding up off the slab and above grade.

woodworkbykirk 09-12-2013 07:50 PM

some rebar into the slab wher the block is would be a good idea to tie it togehter

workdog 09-14-2013 07:59 PM

Thanks Joecaption thinking the same, might even add other course of blocks.


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