HSS wind girt with web holes 1

[GarBow]

I have a HSS 203x203x9.5 wind girt with a HSS 89x89x9.5 vertical brace running through the wind girt. The center line of the brace is offset from the wind girt (see sketch). My plan is to have the HSS89x89x9.5 fabricated approximately 600 long with end plates welded on each end to splice the vertical brace. This short piece would be fitted to the wind girt in the shop.
My question is how to reinforce the web holes in the wind girt? The wind girt is a class 3 in bending and I was looking at following the method for web holes in W-sections, but I don't think this method is applicable for this situation.

 

[271828]

How sure are you that the girt needs to be reinforced?

Could you run a gusset plate through the HSS203x203 instead of running an entire HSS89x89 through it? With only a gusset, the HSS203x203 loses only a very small part of its section. If the HSS203x203 is in tension, then this would almost certainly work. If it's in compression, it still might work depending on the situation.

 

[GarBow]

This particular wind girt may not need to be reinforced but there are similar girts with the brace located near the center of the span that will need to be reinforced.
The vertical brace is designed for tension and compression. The specified brace section is actually a HSS 152x152x6.4. I reduced the splice member to the smaller size to pass through the girt.
If I used a through gusset I would have to check for buckling and I expect the size of the plate would be wider than the splice member.

 

[KootK]

I like 271828's through gusset. I'm guessing his version was intended to run perpendicular to what I've shown.

 

[KootK]

If you're set on reinforcement, I feel that some welded side plate would do the trick so long as they are sized to:

1) Replace the Zy/Zy and Ix/Iy of the original member.

2) Pay homage to tension lag in getting loads into, and out of, the reinforcing plates.

Handily, the brace stub itself will probably do a good job of bracing the top and bottom of the girt against local buckling.

 

[GarBow]

Thanks 271828 and KootK. I will run with this gusset type connection.

 

[GarBow]

KootK, I just saw your latest post. I like the reinforcing plates to strengthen the girt.