Corner Window Connection

Sokka10 · Feb 9, 2022

Good afternoon, I have a wood-framed residence here with a corner window. I wanted to run my idea past you all here to see what you think. The snow load in this area is large (65 psf roof snow), thus the outriggers shown. Also, the roof framing here are parallel chord trusses where the slope for the bottom and top chords is 2:12. I calculate Header 1 to have a reaction of approximately 13 kip at each end. My idea is to bear Header 1 on top of a 6x6 column in the corner. Then Header 2 would be sloped at the 2:12 pitch and have a concealed flange hanger that hangs into the end of Header 1. My previous experience with corner windows are where the window on each side is small (3' or so). Haven't had one where the openings are this large (combined with a large snow load as well).

- In your experience is this an acceptable way to frame this corner?
- I have concerns about out of plane loadings at the corner since the 6x6 column won't extend up to the top plates. Thoughts on this?

I appreciate any thoughts or comments that you may have.

EcoGen · Feb 20, 2022

Not sure what kind of out plane loads you'll have with the set up that you described. There may be some alternate Simpson connections you could use for a better fit. Can you provide a detail sketch and show the location of the section cut on plan for us to get a better idea?

Sokka10 · Feb 23, 2022

Here is a side and front view of the connection at the corner.

The out of plane loads I'm thinking about are wind loads perpendicular to the faces of the walls. On a normal window opening the wind that hits a big window or door opening would transfer into king studs at the ends of the header. The king studs are then attached into the top plates at the top and the sill plate at the bottom. However, in this situation the 6x6 post that acts as the king stud doesn't go all the way up to the top plates, so it has to be braced by the beam in both directions, right?

So my main question is how would you attach the taller header (the one over the flat transom windows, not the angled ones) to the corner post? Just toenails? Some kind of post cap? Or what about a strap from the top of the beam down the side of the column?

jayrod12 · Feb 23, 2022

In this instance,I'd be ok with your original proposal, however having a beam hanger and a post cap fighting for the same space it tends to get messy.

I'd be more inclined to have a custom fabricated column cap to suit all of the sizes and slopes.

phamENG · Feb 23, 2022

Simpson has a semi-custom line that lets you support both. You have to specify the sizes, angle, pitch, etc. and they fabricated a connector. Or you can design something for a local shop to fab up.

Sokka10 · Feb 26, 2022

Ok great, thanks for the input. Based on your recommendations I've spec'd out a Simpson cap with a seat for the sloped beam. Thanks!

dik · Feb 26, 2022

It appears to work OK... if you have that much snow, then you might find that corner a little on the cool side during the winter.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

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