Anchor depth

68gtxman said
No vapor barrier on the walls - just the bottom. 1/2” rebar is fine. The control joint is most likely just a saw cut that is 1” deep (1/4th the depth of the slab). Just cut right through that joint (put your saw blade right in it and saw the rest of the way through the slab) and dig it out. If the joint is really an expansion joint, there will be a filler board in it. In that case, cut the filler out inside your new hole and butt the new concrete directly against the existing concrete. You don’t need to recut the control joint in the new interface. That interface will already be the weak spot that will crack before the uncut slab will crack. Control joints are used to direct where the slab will crack.

It is a 1in control joint. Cut when the concrete was still wet.

So if it is placed in the orientation shown with the lift columns being placed 6” from where the edge of the new slab is poured. Would this be a problem? Since the interface where the new concrete meets the old is 6” from the lift columns? If a crack forms