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Typical gross rebar to concrete ratios in flat plate slabs

Typical gross rebar to concrete ratios in flat plate slabs

Typical gross rebar to concrete ratios in flat plate slabs

(OP)
Hey everyone,

Just wondering, does anyone have typical steel rebar to concrete ratios that they try to adhere to? For example, a flat plate slab that is 12" thick, if your rebar came out to "x" tons and your surface area of concrete came out to "y", you'd have "z" tons/sq ft. Any typical values people try to meet? It would vary if your slab was say 14", or say if your slab was a transfer slab. But I'm just wondering if there is any sort of common ratio that happens. I have two different transfers slabs that have the same amount of stories above (4), same thickness (14), and got a ratio of 0.004 tons/sq ft.

Any thoughts on this?

Thanks!

RE: Typical gross rebar to concrete ratios in flat plate slabs

EDIT: Sorry, I misread your post. Deleted my content as it was not relevant.

RE: Typical gross rebar to concrete ratios in flat plate slabs

For estimating, I often use 150 lbs/yd, which is a little less than 0.004 tons/ft2. This is for normal flat slabs, not plates, so, 150 might be bumped up to 175 lbs/yd which is equivalent to 0.0038 tons/ft2 (too close). You're not likely far off. Usually for estimating, I break things down to lbs/yd... footings, slabs, walls, columns, beams, etc. have equivalent lbs/yd and it doesn't change much for regular construction. That includes laps, splices, etc.

Dik

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