Electrical conduit is proposed inside a 6 in. thick structural slab before the concrete pour. Which ACI dimensional limit is the key check for conduit outside diameter in that member?
Correct Answer
C) It may not exceed one-third of the slab thickness
ACI 318 limits embedded pipe or conduit outside dimension to not more than one-third the overall thickness of the slab, wall, or beam in which it is embedded; in a 6 in. slab that cap is 2 in. Other choices: material alone does not remove the limit, one-half thickness is too large, and a universal 1 in. cap is not the ACI dimensional rule.
Why This Is the Correct Answer
ACI 318 limits embedded pipe or conduit outside dimension to not more than one-third the overall thickness of the slab, wall, or beam in which it is embedded; in a 6 in. slab that cap is 2 in. Other choices: material alone does not remove the limit, one-half thickness is too large, and a universal 1 in. cap is not the ACI dimensional rule.
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