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Can reinforcement bars be bent twice?

Can reinforcement bars be bent twice?

I have a contractor who bent a #5 bar 90 degrees and now needs to bend it back up.  Does the bar undergo some diminished tensile capacity when bending it multiple times?

RE: Can reinforcement bars be bent twice?

Is this in Australia/New Zealand? AS 3600 has provisions for rebending bars but that is for Australian reinforcing only.

RE: Can reinforcement bars be bent twice?

We often use "rebox" or similar where bars are bent at 90 degrees inside a rebate in a wall, then bent out into a floor.  The bars need to be the appropriate grade, which as sdz says, are defined by AS3600.  Australian produced reinforcing is generally very tolerant of rebending.

RE: Can reinforcement bars be bent twice?

look up the onesteel website, I am sure they have advice on this.

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