Wondering about procedure certification

By - Date 04-27-2000 00:13

I'm managing quality on a rebar job that involves welded rebar cages for a tunnel. The welds are on a lap joint one side only. The testing involves exerting pressure to 9000 lbs on test specimens in a hydraulic testing jig we've tooled. The welds are performed with .045 e70s2 using gmaw,co2 mix on a 4, 5 bar overlap (weldable mild steel bar).
I guess my question is, how do we qualify our procedure? The cages are being built on jig fixtures and shipped from our plant, and the weldors
will be tested on a weekly basis.
Any and all comments, suggestions are appreciated. This is a sudden change of carreers for me. I was formerly a tig welder for an aluminum truck tank manufacturer, so I was up to par on the new dot regs and such but this is unfamiliar ground.
bushman

By R. Johnson (**)

Date 04-27-2000 13:22

You need to obtain a copy of D1.4 from the American Welding Society. This is the Structural Welding Code-Reinforcing Steel and it will give you guidance in qualification of welding procedures and welders. A weekly qualification of the welder is overkill and should only have to be performed once unless there is some reason to doubt the abilities of the welder.