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Strange welding rod

3

300jk

Well-known Member
Ok this was on the big bridge job I have been working on today. All the bridge I beams are set. Today a company
came in and welded steel studs perpendicular to the beams on top of them. Then they took aluminum angle iron
and welded them to the steel studs. The welder was a Miller Bobcat. These angles support steel pans which the
bridge deck is poured on. I didn’t have a chance to talk to the welders. So what rod would weld the aluminum angle
to the steel studs ?
 
Are you sure it wasn't galvanized angle ? Hot- dipped can be shiny . If it is aluminum it's something I never heard of in 35 years of metal work .
 

He is talking about shear studs. I would expect the angle was galvanized or stainless. I'm not quite following the description of the angle welded to the studs to support the pans; as normally the pans would be at or below the top of the beams where the studs are, from what I am experienced with.

mvphoto58487.jpg
(Picture from the internet)
 
Miller Bobcat?

Always thought that Capacitor Discharge or Drawn Arc Stud welders were used to weld studs to iron beams.

Cant weld aluminum to iron. May have welded steel to iron then threaded an aluminum nut or sleeve over the stud if aluminum was actually used.
 

Duh, I should have known they were stud anchors for concrete.
I have drafted dozens of fab drawings with such being used.
We called them headed anchors or HA's.
Even thou shear anchors may have been ordered.
 
If you run an engine with no oil or water, I have seen where the aluminum piston would weld itself to the cast iron block! No rods needed!
 
Apparently it can be done. Here is what I found on the net. https://www.midsouthsupply.com/welding-aluminum-to-steel/ Don't look like something I would want to do.
 
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