Cap plate welds

[mlzahn]

If I have an HSS4x4x1/4 that needs a cap plate, what weld should I use and what cap plate thickness should I use?

I'm used to specifying a cap plate thickness that matches the HSS wall thickness.

I'm used to specifying a partial pen weld because I don't want to require inspection. But partial pen welds have min root thickness of 1/8" and have have an effective weld thickness equal to the thickness of the weld that is called out (S) minus 1/8". I should mention that I would prefer to not call out a particular welding procedure.

Is there another weld that I should specify? Do I need to increase the thickness of the cap plate or the hss wall?

 

[ToadJones]

Fillet wont work?

 

[connectegr]

If the cap plate is slightly larger than the cross section of the HSS, use a fillet weld and mentioned by Toadjones. If welding in the proper positions with FCAW or GMAW processes, you can use BTC-P4-GF with allows S = E (no 1/8 loss).

http://www.FerrellEngineering.com

 

[Teguci]

If this is a nonstructural weld, indicate an all around fillet and in the note area, indicate a seal weld. As for the cap plate thickness, do you care if the plate is light guage (ie leave this up to the fabricator)?

 

[hokie66]

Just saying "cap plate" doesn't tell us much. In my nomenclature, a cap plate is an end plate on a column, and at least one beam bears on it. In that case, I would never use anything less than a 3/8 or 1/2" plate, with a 3/16 or 1/4" fillet weld all around and 4 bolts to the beam. If this cap plate is just for sealing off the top of a post, then most any competent welding arrangement will do.