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crack width check

crack width check

(OP)
Dear experts

i was designing a big tank with very high straining actions , and i FACED a problem in the check of the crack width should i commit with the following table and equations in ACI224R-01 or only the maximum steel stress and spacing mentioned in ACI350-06



Thank you

RE: crack width check

Whichever ends up with more steel.
If it's a round tank limit your working stress to 16,000 psi. If it's rectangular use 6 inch spacing and limit the stress to 24,000 psi. I'm simplifying some stuff from the old ACI 350-89.

RE: crack width check

(OP)
thanks JedClampett , u are right more reinforcement and more thickness.
your suggested near to ACI350-06 for check on the stresses and spacing depend on type of exposure and type of element (one way and two way) also as per the commentary in the same code [b](R10.6.4 — This section replaces the z factor requirements of the 2001 code edition. The maximum allowable stresses are now specified directly as a function of bar spacing),so all above equations which are depend on (Z) are replaced in the last code .

Thank you

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