Built a 38x36 garage in 2012 and not a single crack in my floor, but I also poured the floor 7” thick. I used 3/8 rebar at 2’ apart and drill the rebar into the pony walls. I just built my MIL a garage 2 yrs. ago and poured the floor 10” thick with the same rebar setup and no cracks to date. I also went with 18” x 8” pony walls with pilings every 6’ and went 4’ deep. I built cages to drop in the holes and tied the wall rebar into these. Adding fibreglass helps as well with the strengthening of the concrete.
Last edited by ram crazy; 10-21-2018 at 06:57 AM.
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