I am planning to demolish a load-bearing wall and replace it with posts and a laminated beam. I visited a site where I could calculate this (though I had to choose a 1 1/2-story house) and got dimensions for the columns and the beam. I chose the highest loads except for snow, where I selected my own zone.
In my case, there is only a loft above (though it is used for storage). The drawings are in poor condition, extracted from old originals at the building department, with the wall to be removed circled in red.
Am I in the right ballpark, or is there a risk it will be too weak? I think that since it is for 1 1/2 stories and I only have a loft, there should be some margin. Or are there pitfalls depending on the house's construction that could make these standard calculations incorrect?
For your information, I ended up with 90x90 for the columns and chose 90 x 270 for the beam from the available options.
I believe that the calculation apps work fairly well when it comes to more modern houses, although I would never use one myself. However, I am doubtful about their suitability in your case. Depending on which snow zone your house is in, 90x270 might be on the flimsy side. However, 90x90 glulam posts would certainly work.
If it's building descriptions/Swedish wood, I would feel more than confident. If it's some odd site, I would check out the aforementioned. I also think that 90x270 for an estimated 3m opening is realistic.
I can't imagine there being anything unforeseen causing issues. The roof truss should absolutely be load-bearing on the outer walls, and then it's just the lofts.
Yes, these are construction descriptions for Swedish wood.
Blurry pictures, yes. There's a support on each side. Visible with a little imagination on the left half.
The supports rest on a cross plank since the trusses and the floor joists have different centers.
The span I want to alternate is about 2.6m
Snow zone 1.5 (Gothenburg).
