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ACI section 12.10.5 - Cutoff

ACI section 12.10.5 - Cutoff

ACI section 12.10.5 - Cutoff

" — Stirrup area in excess of that required
for shear and torsion is provided along each terminated
bar or wire over a distance (3/4)d from the termination
point. Excess stirrup area shall be not less than
60bws/fyt. Spacing s shall not exceed d/(8βb)."

Could anyone tell me what does it mean?, the extra stirrups should be put above the terminated bar or in a region beyond the cutoff point?


RE: ACI section 12.10.5 - Cutoff

It reads "along the the terminated bar", so I would assume that it is "above" the terminated bar (as you state). But why not just extend the bards to the compression zone?

RE: ACI section 12.10.5 - Cutoff

The code does not permit flexural reinforcement to be terminated in a tension zone unless one of the three conditions in 12.10.5 is satisfied. The stirrups per section are required before the cut-off point and not after. The intention is to restrain diagonal cracks by closely spaced stirrups. Although providing extra stirrups(over and above the regular stirrups) over 3/4d would be acceptable, I would design the stirrup spacing to suit this section requirement in the first place.    

RE: ACI section 12.10.5 - Cutoff

Thanks I got it

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