Slab-on-Grade control joints under load bearing walls

[kingpenn3]

Does anyone have any bad experiences with placing Slab-on-Grade control joints under load bearing walls? Should this be avoided?

I know Slab-on-Grade control joint placement has been discussed before, but I don't see where this particular issue has.

 

[jayrod12]

My first questions are, what supports the load bearing wall? Is it the slab directly, or some sort of foundation below the slab?

 

[kingpenn3]

There will be a footing (not thickened slab) under the load bearing walls.

 

[WARose]

Does anyone have any bad experiences with placing Slab-on-Grade control joints under load bearing walls?

Directly under the wall? If it's a saw cut joint, how can you (physically) do that? For any kind of joint, I'd have it adjacent to the wall.

 

[jayrod12]

Then I wouldn't be concerned personally that they put a construction joint below the wall. Generally though, I tend not to have my slab on grade rest directly on the footing and it tends to cause cracks in the slab at the edges of the footing. I typically have two possible details, 1) top of footing is top of slab and there is a construction joint at the transition between footing and slab, 2) if footing bearing is some distance down from slab elevation I'll pour a curb from the footing up to the top of slab and have the wall rest on that. Both details do not have the slab run under the wall.