In preparation for a basement bathroom, I removed a 6' x 7' rectangle
of the concrete slab to run a bunch of drains over to the main stack.
My question is:
Before I re-pour this section with new concrete, should I dowel in
rebar around the perimeter of the existing concrete to keep the new
section from sinking? If so, what length of rebar and how far do I
dowel it in to the existing? Or are there easier methods that would