Hello, I plan on using #3 rebar in an 18″ grid pattern on 2″ chairs for my garage and basement slabs (4000 sq ft @ 3500 psi/Fibermesh) and was wondering if I space the chairs at 18″ or can I go to 36″ spacing?. I can’t seem to get a straight answer from the concrete guys I know, they all use wire mesh and say the rebar is useless, but it seems to me the mesh always ends up in the bottom of the slab.
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Replies
you can space as big as you want as long as the rebar off the ground.
As Brownbag says.
But I always use 'dobes, the little concrete blocks made for the same purpose. Get the ones with the wires. Usually come in 2" or 3".
Those metal chairs are a PITA...often flip over and drop the bar during the pour.
<<Those metal chairs are a PITA...often flip over and drop the bar during the pour.>>
Wire ties are cheap insurance for that problem.
Even with wire. I still prefer the adobes