Posted by cvengr on August 15, 2003 at 21:09:05:
In Reply to: Concrete and Steel posted by noodle on August 06, 2003 at 15:34:33:
Crudely speaking, no less than 1-1/2" and generally 2"-4".
Column design with reinforced concrete by code is governed by several ACI publications. The explicit answer will depend upon the loading, height, concrete mix, coatings, ratio of steel to concrete, column stiffness, buckling and torsional loading and interior conduits, if any. The exact answer needs to be determined by a professional engineer or if performing an academic exercise, review ACI Reinforce Concrete Column Design practice.
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