Doweling into SOG
Doweling into SOG
(OP)
Hi,
I am working on a basement remodel and have recently trenched approximately 120' lf (1' wide) of the existing basement slab for plumbing. Since most of the flooring under the trenched areas will be tile, I had planned on doweling into the existing slab on either side before I pour back.
My question is regarding the type of dowel and spacing I should be using.
- Should be I be using actual dowels, or will rebar suffice? I had hoped to use #3 rebar (partly for the next bullet point)
- I'm worried about spalling the concrete if I drill (4" sog), and with the trench being 12" wide I'm reduced to drilling at a slight angle. Will this be an issue?
- Is #3 bar enough? What should my spacing be?
Thank you for any help!!!!
I am working on a basement remodel and have recently trenched approximately 120' lf (1' wide) of the existing basement slab for plumbing. Since most of the flooring under the trenched areas will be tile, I had planned on doweling into the existing slab on either side before I pour back.
My question is regarding the type of dowel and spacing I should be using.
- Should be I be using actual dowels, or will rebar suffice? I had hoped to use #3 rebar (partly for the next bullet point)
- I'm worried about spalling the concrete if I drill (4" sog), and with the trench being 12" wide I'm reduced to drilling at a slight angle. Will this be an issue?
- Is #3 bar enough? What should my spacing be?
Thank you for any help!!!!






RE: Doweling into SOG
RE: Doweling into SOG
When I am working on a problem, I never think about beauty but when I have finished, if the solution is not beautiful, I know it is wrong.
-R. Buckminster Fuller
RE: Doweling into SOG
RE: Doweling into SOG
Find the shortest bit you can
RE: Doweling into SOG
RE: Doweling into SOG
RE: Doweling into SOG
RE: Doweling into SOG
unless you saw cut the existing concrete, you will have a rough surface that will provide interlock. you should not need dowels and drilling and doweling into 4 inch thick un-reinforced slab is questionable at best. that may create more problems than it solves. leaving a bench of undisturbed material so you have a T-top trench repair as mentioned above is another good method to support your new concrete but might require a wider slab cut.
RE: Doweling into SOG
In addition, the new drain line we install we be near the bottoman of slab in areas, so proper compaction will be difficult for much of the area. Likely the same 3/8th to 1/2" clean gravel will be used for backfill in other area.