?? weld process/certs for metal wall studs 16 ga. galv. ??

By 803056

Date 05-01-2017 14:02

D1.3 Structural Welding Code / Sheet Steel

By welderbrent (*****)

Date 05-01-2017 16:49

Al gave you the applicable code to go by. You need to check it out for everything else because there are lots of variables you have not given us.

Brent

By jwright650 (*****)

Date 05-01-2017 17:13

For load bearing and braced frames made out of Cold Formed Metal Framing (CFMF), I have seen SMAW used, and self- shielded FCAW. Personally, I think the FCAW had the best looking welds. Like Al stated, the usual code is AWS D1.3

By welderbrent (*****)

Date 05-01-2017 21:58

I agree John. The self shielded flux core does the best job for good consistent welds in MOST applications and positions. But, the welder sure has to know what they are doing. I have seen some really PRETTY (LOL) welds that weren't fused to base metal. Didn't burn through the zinc. They were slightly bonded at the zinc level, but no depth into the steel.

He Is In Control, Have a Great Day, Brent

By 123weld (*)

Date 05-02-2017 13:42

thank you, do you remember what rods youv'e seen w/ smaw?

By jwright650 (*****)

Date 05-02-2017 18:10

They had to use 70,000 rods on that project, so they elected to use 3/32" Φ E7018's. I had to get them to come back and repair all of the places where they burned through and left a hole in the studs.

Like I said earlier, I thought that the .035" Φ self-shielding FCAW did a much better job and looked a lot nicer, but that was on another project.

By Lawrence (*****)

Date 05-02-2017 20:10

I would agree with the self shielded FCAW for field welds

For manufacturing .035 solid wire and globular transfer will do the best on primer or G90 unless you spend a TON on cored wire (which I can't see any justification for)

By 123weld (*)

Date 05-03-2017 00:53 Edited 05-03-2017 00:56

i bet they burned holes w/ that. Recently I used 3/32 7014, it does a nice job, but you need to be very, very, very, in tune. there is no margin for not having the perfect, start, angle, arc length,motion etc. I found it difficult, the slag is also tricky
ive used nr211 .030 a couple times before, but had reasons not to on this job. thanks everyone for the time being, i may come back later for more advice

By TimGary (****)

Date 05-03-2017 20:40

http://www.hobartbrothers.com/product-details.html?name=FabCOR%26reg%3B+F6

Use where weld quality / reliability counts when welding over zinc.

By 357max

Date 05-03-2017 15:18

What about resistant spot welding (RSW)?

By jwright650 (*****)

Date 05-03-2017 15:42

All of the structural stud jobs that I have inspected had the studs welded at the toes of the channel or if there were a 3 or 4 gang post, they could be welded at the toes and also at the heels when the studs are back to back. I've seen 6"" up to 12" continuous welds at the top and bottom, with 2" every 12" in between. Then the braced frames have the studs welded to the top and bottom tracks and also gusset with 4" wide x bracing made from flats, all welded continuous at the ends to the gusset.