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IBC Table 1805.5(5) Foundation Wall Reinforcing Conflicts with ACI-318

IBC Table 1805.5(5) Foundation Wall Reinforcing Conflicts with ACI-318

IBC Table 1805.5(5) Foundation Wall Reinforcing Conflicts with ACI-318

(OP)
IBC Table 1805.5(5) indicates vertical steel requirements for foundation walls, based of various wall height and unbalanced fill height combinations.  Steel bar sizes vary from #5 to #7, and spacings from 30" to 48".

Per ACI318-08 Section 14.3.5, vertical steel shall not be spaced farther apart than three times the wall thickness, nor farther apart than 18 in.  For the three sizes included in the IBC Table, that translates to spacings of 22.5", 28.5", and 34.5", all of which exceed the other maximum allowable criteria of 18", per ACI.  All of these spacings appear to conflict with ACI.

Are there perhaps some other code sections IBC or ACI, that justify or allow these discrepencies/differences?
 

RE: IBC Table 1805.5(5) Foundation Wall Reinforcing Conflicts with ACI-318

Check out ACI 318, Section 1.1.2 for the "technical" out when ACI conflicts with the IBC.

 

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