Weld basics
Weld basics
(OP)
I'm an RE on a bridge construction project. The contractor field welded some clips in the tension zone of a girder, which they now have to remove and grind down to the base metal. I know that this is an acceptable method, but I don't know why (my background is in soils). I'd like to understand this better.
Does anyone have a link or a simple explanation as to why this is the case?
Thanks in advance.
Does anyone have a link or a simple explanation as to why this is the case?
Thanks in advance.





RE: Weld basics
RE: Weld basics
RE: Weld basics
RE: Weld basics
The depth of the heat affected zone can extend into the base material for up to 3/16", depending on base material chemical composition and welding process. In some cases, all you need to do is to grind flush the base metal where the attachment was welded. If you want to remove some of the heat affected material from welding, you may need to locally remove an additional 1/8" to 3/16" of base material beneath the welded attachment. If the material is structural steel, I would not remove any heat affected material after removing the welded support. I would perform surface NDT to ensure no cracks in the base material at the location where the attachment was welded.
RE: Weld basics
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"