Can reinforcement bars be bent twice? Can reinforcement bars be bent twice? ofthesea (Structural) (OP) 19 Feb 09 13:18 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? sdz (Structural) 19 Feb 09 20:17 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? hokie66 (Structural) 19 Feb 09 22:38 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? csd72 (Structural) 5 Mar 09 13:57 look up the onesteel website, I am sure they have advice on this.