Is there any ref standards, welding procedure, electrodes to be used, post welding heat treatment, etc for welding steel bar to be used in reinforced concrete structures ?
Thanks for any suggestion
In Canada, reinforcing steel can be spec'd as weldable, else, it's a matter of doing metallurgical testing to determine if the bar is weldable. There are likely AWS or ASTM standards for this.
A615 is weldable, however the chemical composition of the bar needs to be known prior to welding. A PQR with proper pre-heat requirements listed can then be created. Some jurisdictions limit the max Ce a A615 bar can have for welding.
I understand that welding A615 is not preferable, but sometimes necessary. Like reinforcing an existing wall. I've never had to do it, but like sandman and bridgebuster, I thought it just took some special care.