Quote:
Originally Posted by HardDrive
If its a pergola, and won't be subject to load bearing forces from rain/snow, couldn't you just build it on top of the existing slab?
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This ^
Here is a 10 ft. x 12 ft. pergola at HmDep. It weighs under 800lbs. That makes for 200lbs per corner.
Ask, will the slab crack if a 200lb man stands on a corner? --read: shouldn't be a problem.
The slab isn't built on a swamp, is it? (I would expect that it's on solid ground)