Hello I am keen on tearing down a whole corner of our extended house. Unfortunately, those particular walls have a large dormer on the extension. It feels a bit heavy to solve with a laminated beam. Perhaps I should mention that I'm going to knock out the walls to install glass doors on the ground floor, so there isn't more support than in the attachment points and the corner, of course. It is thus a corner where the walls are about 4 x 5 m in each direction. I was considering that maybe an H-Beam could solve the problem as the span that the roof trusses rest on is quite long. It is the longest wall that the roof trusses rest on. The house is on a slab foundation made of concrete, and the walls and floors are made of lightweight concrete. My question, which I hope someone has a good answer to, is what construction one should look closer at & where one can get a calculation on the beam needed. It would be bad if the house tipped over

maybe someone has some tips that could help etc.

I have training as a blacksmith, but it's been 30 years since I built gantries, etc. (time flies when you're having fun, as they say)