while working on a high rise here in the city the erection co. decided to use dual shielded mig with a 3/32 filler wire. this put down so much weld metal so fast it seemed like casting instead of welding. we started with 1/8" back up bars but the filler wire was blowing right through so we went to 1/4" the inspection co. was using ultrasound so if you took your time and chipped real good between passes and preheated to specs. there were hardly any cutouts.
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