Weld Studs

[LSPSCAT]

A consulting engineer has specified 3/4" DIA headed studs welded at a 45 DEG angle to a flat plate. I have searched and called around to our stud suppliers and they do not seem to have studs and ferrules available for this application. They suggest welding straight and then bending over. The other alternative is to grind standard studs at 45 DEG to get a decent fitup and then fillet weld. Obviously production would like to be able shoot these rather than fillet weld each one individually. Any thoughts or recommendations?

Thanks

 

[WillisV]

How long are they? Can you use a deformed bar anchor with an angle bend in it instead? DBA's up to 1/2" can also be welded 45 degrees directly.

 

[LSPSCAT]

No, deformed bar is not allowed. All materials (base,stud) are stainless steel. (3/4" DIA. - 6"-9" long headed studs)

 

[slickdeals]

Did you try contacting Nelson? I have seen 45 degree angle studs, but at the corners of steel angles. I haven't seen one on a flat plate.

But I think the more important question is why a 45 degree weld to a flat plate? What is forcing the stud from being straight?

 

[ishvaaag]

You can also drill through at 45º, set inside the stud and weld thoroughly (application permitting) both well and fillet, or fillet both sides.

 

[LSPSCAT]

Plate is embedded close to a corner, therefore the plane face of the concrete parallels the stud in the depth direction. There is approximately three inches of cover for the stud at the base. Owner drawings show the stud at 45 DEG angle with the plate, therefore it gains depth with respect to the perpendicular wall face as you move along the length of the stud.

We submitted drawings showing the stud moved back on the plate and straight, with approximately 5" of cover which would have placed it just inside the first wall mat. We have had no luck negotiating or submitting changes. Loads are not quantifiable, mainly a corner guard for lack of a better term. I will post a sketch showing detail after hours. I believe our best alternative is to grind the studs to a 45 DEG angle and then fillet weld by hand.

Nelson can make it work for 1/2" DIA but they have not gotten back to me with the 3/4 stud problem. Problem is the stud base on the 3/4" anchor does not come close to the base material at 45 DEG.

 

[dik]

Typically they would weld at 90 degrees and bend it so that the shear force would force the concrete onto the plate.

YOu bend it to test the weld to see if OK. I've never seen one welded at 45 degrees and have never seen a stud with a bevelled base.

Dik

 

[Ron]

Agree with Dik and others....weld then bend. Have done thousands of bend tests on studs...most can do 45 deg with no problem.

 

[LSPSCAT]

Thanks for the responses.