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Concrete Code Interpretation

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In ACI-318, section 10.5, if flexural steel ratio provided is less than
200/fy, you can only use 75% of the computed moment capacity. However, in
paragraph 10.5.4, a lower minimum steel ratio is provided for slabs and
footings per section 7.12. My question is this, can you ignore the 200/fy
requirement and still use the full computed moment capacity for a slab on
grade as long as you meet the minimums in 7.12? I am reviewing an existing,
lightly-reinforced thick concrete pad for possible mounting of some heavy
equipment. It computes if I can avoid taking the discount for the low steel

Jim Lutz, P.E., S.E.
Earth Tech, Inc.

10800 NE 8th Street - 7th Floor
Bellevue, WA 98004
(425) 455-9494
(425) 453-9470 FAX

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