Thanks for the comments and quick feedback. Yes, it is matched wall tube so two fillets and two flare groove butts would be a correct description. The GM's idea was to implement some sort of press jig to implement ERW at the tee weld. I have 0 experience with ERW. But first thought is that it is not compatible with tee joints.
I have as much information as you do at this point. I would assume it's commercial work, no code. Also, any ERW/GTAW equipment would need to be purchased.
This is baby steel when we work daily with jumbo i-beams and girders. I'm pretty sure they just want to know which way to go for the estimate.
Thanks for the help!
Mike