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Hello Everyone: I'm getting ready to pour my 3 bay garage slab and had a few questions.I plan on pouring 4000lb mix and 5"thick in two of the bays and 6"-or 7" in the 3rd bay.The third bay will have a 2 post 10,000lb car lift in it. The lift specs say 4" minimum sounds a little thin to me. Also I'm adding # 3 rebar 18"on center criss crossed with fiber mesh.Garage is approximently 26'x36 with a sand base. Questions are:I want to install 2"foam board to give me a thermal break from the ground does that sound ok even though I'm not going to use radiant in the floor?Should the rebar be pinned to the side walls?And should I replace the sand base with 3/4" stone. I live in CT.Any help will be appreciated.