Tack-welding on A706 rebar
Tack-welding on A706 rebar
(OP)
Hi!
Can I use tack welding on A706 rebar, not A615?
Which code/spec refers to this problem?
Thanks!
Can I use tack welding on A706 rebar, not A615?
Which code/spec refers to this problem?
Thanks!






RE: Tack-welding on A706 rebar
Where I've run into this was contractors wanting to tack-weld the rebar instead of tying it, but the ones wanting to do that also didn't have weld procedures qualified, etc.
RE: Tack-welding on A706 rebar
RE: Tack-welding on A706 rebar
RE: Tack-welding on A706 rebar
So, is tack-welding not allowed for both A615 and A706?
That's my question.
Thanks again!
RE: Tack-welding on A706 rebar
RE: Tack-welding on A706 rebar
I guess there is confusion between structural welding and tack welding.
RE: Tack-welding on A706 rebar
I vote no. The issue with tack welding is the embrittlement that results from rapidly heating a small portion of the rebar cross section and then allowing it to rapidly cool. While this might apply less to A706 owing to it's improved ductility, I think that it still applies.
The localized embrittlement business could be resolved by applying appropriate D1.4 preheat but it's hard to imagine anyone going to the trouble of preheating and inspecting just so that they can tack weld.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.