Been looking at this myself.
http://www.concretenet.com/HomePage/WOCHomePage/1,1156,problem_clinic~pclinic^J960582B,00.asp
says:
<snip>
"Section 7.5.4 of Building Code Requirements for
Structural Concrete (ACI 318-95) says welding of
crossing bars shall not be permitted for assembly of
reinforcement unless authorized by the engineer. Tack
welding can seriously weaken a bar at the point welded
by creating a metallurgical notch effect (see Figure)
according to the code commentary."
<snip>
I found this by searching on Altavista for the
phrase "weld rebar".
Coincidentally, as I typed this, my local steel
supplier called me to tell me my rebar order is ready.
73 Mike N2MG
On Wed, 22 August 2001, w7xu wrote:
> Can someone please remind me why it is that, at least in
> general, you aren't supposed to weld rebar? I was thinking
> of just tacking together the corners of a rebar cage to
> make is a bit easier to handle (as compared to just wired
> together).
>
> Thanks & 73,
>
> Arliss W7XU
>
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