Wow, you guys are really overthinking it. This is buying the guy 1.5-2" to fit a dog door in a space less than 16" between the studs on the right and trimmer/king stud on the left.
I was just about rolling on the floor over the steel post idea. Might as well get a building permit and hire a general contractor to complete this major renovation.
This really isn't that big of a deal. But, yes, be sensible when cutting structure - ask the question. Be safe. I'm guessing the stud at the left edge was put there 16" over from the exterior corner and the studs on the right were added for an additional load coming down at the corner. The trimmer and king stud next to the window and the multiple studs on the right are doing just about all the work on this short wall section.
ps2cho, the only exception is if you have some major load coming down from above on the right side of the window to the left of the hole, this would be if you cut back the sheetrock and saw solid studs all the way over to the window; or seismic holdown hardware. Then I would suggest finding a different place for the doggie door. Removing a little more sheetrock will reveal all, you're already in to repairing it, what's a little more?
Source:
I've been drawing houses and doing gravity calcs for 28 years.
I don't know why you'd be rolling on the floor about my steel post idea. You may very well be a good house designer (you didn't mention being an architect) but your drawings are not always followed to a T. Anything over 3 members supporting a beam is not good framing. E.g., a vertical stack of 2 x's will never be as stable as a post. If it's a 6 x beam above, it should have a 4 x 6 or 6 x 6 under it with kings on either side to prevent rolling. I've seen double kings, of course, just as I've seen double trimmers (or jacks depending on where you live). Who knows what's behind that wall? Only the OP and he's not here anymore.
But a steel column will do more work in less space than a gaggle of lumber and it has better attachment features than any piece of wood short of using hold downs (that you mentioned) and a saddle at the top. Now do I tend to do things right? Yes. And it was just one idea of many presented here. Some will work and some are ludicrous.
(Speaking of
saddles, they are a ***** to retro fit whereas a column slides right in with no work to be done above the ceiling.)
You say, " The trimmer and king stud next to the window and the multiple studs on the right are doing just about all the work on this short wall section." What is "
just about?" Do you see some other structure in there that we don't see? Is there a shear panel?
No one here knows anything until the OP opens the wall up. Going to the bullnose corner bead just makes good sense at least to the height of the dog door. Much better patch.
Building permit? Well, if you ask an inspector, he/she will tell you that a permit is a requirement. But here one is needed to change out a water heater. And there's good reason for that since we live in seismic city.
BTW, since I'm on a rant, when we had the "Northridge" earthquake there were many 2 story failures. Turns out most of the buildings that came apart were 'short nailed'. It's always a good idea to improve on a situation especially if it needs improvement.
And that *********** in that wall is a candidate.