Bending Reinforcement bars
Bending Reinforcement bars
(OP)
Hello All,
Is there any standard or specification available for bending reinforcement bars? Is it OK to use welding torch? Is there any damaged to the material?
The material is CSA G30.18 Gr. 400 Mpa. Pictures from field indicates that welder has used the torch and darkened (black) areas appear in the bended region
Thanks in advance
Is there any standard or specification available for bending reinforcement bars? Is it OK to use welding torch? Is there any damaged to the material?
The material is CSA G30.18 Gr. 400 Mpa. Pictures from field indicates that welder has used the torch and darkened (black) areas appear in the bended region
Thanks in advance





RE: Bending Reinforcement bars
http://www.arcreo.com.au/bending-reinforcement-sha...
Hoping this helps,
http://www.welding-advisers.com/
RE: Bending Reinforcement bars
There are reasons hot bending could be used, but it not common, and can negatively affect the mechanical properties of the steel. It also adds significant cost to an inexpensive process. Bend diameters are limited by codes (ACI 318 in the US). There are also bend diameters/radii in the relevant ASTM standards for our market here, however these are for bend testing bars for acceptance and should never be used for fabrication.
RE: Bending Reinforcement bars
Is there any damage to the material - almost certainly YES. Heating re-bar is one thing, but without proper control over the cooling, which is very unlikley, extreme brittleness / hardness can develop and the re-bar just snaps. To get it soft enough to bend by hand - otherwise I asusme they wouldn't have done it - needs red hot metal.
Sounds like time to fire the person responsible and then cut the affected bars off and start again or you risk collapse of your structure - your call.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Bending Reinforcement bars