Fillet Weld Minimum Fusion Face 1

[Trenno]

Hi all,

Just a quick and simple one.

Consider the steel connection below, where the edge of the plate and the flange of the SHS are flush. Can you achieve a sufficient/practical fillet weld as shown in red?

Or do you need to extend the width of the plate such that it creates an effective 90 deg junction? A minimum length of fusion face as such.

Thanks in advance.

 

[desertfox]

Hi
Either extend the plate or put a chamfer on the box section and make it a butt weld.

 

[KootK]

As desert fox said, it's either extend the plate or use partial penetration welds which are costly. Unless the column is galvanized, it's usually unnecessary to weld the entire section down. I imagine you're trying to fit in a wall or something.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[Trenno]

Yeah pretty much what I was thinking, extend the plate not less than the weld size - ie 6mm.

 

[KootK]

I'd say weld size + 6 mm. I think there's actually a rule in AISC but I can't remember where.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[tbuelna]

To maximize the weld strength it would be best to widen the plate by 2x the tube thickness on each long side so that you can make a sufficiently sized fillet weld around the entire tube perimeter without undercutting the plate edge. Of course this assumes the base plate has adequate thickness.

If you can't widen the base plate more than the width of the column, then a fillet weld is not possible along the sides. You should use a bevel weld, and it would probably be best to bevel the part edge which is thicker. Which in your case would seem to be the base plate edge.

 

[Trenno]

Thanks for the responses guys. I'll see what the shop detailer wants to do and go from there.

 

[KootK]

should use a bevel weld, and it would probably be best to bevel the part edge which is thicker

Why is that Tbuelna? Just because the thicker part is more likely to be partial penetration?

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.