HSS Corner Weld Detail
HSS Corner Weld Detail
(OP)
I've attached two options for welding square HSS members of the same size together. I'm wondering which, if either, of the two options I show is most common. If neither, what's another option? In both options, you weld the first tube to the one I show in cross section using a flare-bevel weld. Now when you attach the third one you can no longer use a flare-bevel on the inside corner because you've welded shut your bevel. With option A you would do a bevel weld at the inside corner. This seems the most robust design but more difficult for the shop. With option B, the tube would simply be square cut and you would make a fillet weld on the inside corner. This is easier but it makes for strange goings on in the world stress right there.





RE: HSS Corner Weld Detail
Dik
RE: HSS Corner Weld Detail
It was a PDF and the sketch is right at the bottom of the page, you have to scroll down to find it.
B.E.
You are judged not by what you know, but by what you can do.
RE: HSS Corner Weld Detail
Dave
Thaidavid
RE: HSS Corner Weld Detail
RE: HSS Corner Weld Detail
RE: HSS Corner Weld Detail
I think the load in option B still goes where you think it does. I generally prefer the more direct load path of option A. I don't like welding on top of another weld but I'd make an exception here. But I'm ok with either choice.
In this case I'd call for a flat profile for the first weld in either option. If fatigue is an issue, grind your weld(s).
RE: HSS Corner Weld Detail
Oh, you know what I just realized? You would need to do something like fig. 8-19 from the AISC 14th ed. to make those flare-bevel welds. I think if you used the weld build out that they are showing, you would get a continuous load path in that inside corner in both direction (vertical and horizontal).
As far as the knife plates, maybe you've got something else in mind, but what I'm thinking would interfere with each other. Besides, I'm trying to keep the cost low. I would think that would be a more expensive option.
I think option B would be OK for relatively low loads. Have any of you ever actually detailed this type of joint?