Recently bought a house and am planning to take down part of a load-bearing wall. The opening will be about 6m. It's a single-story villa from Boro built in 1991. I believe it has W trusses Attic construction showing wooden trusses and insulation material on the floor, related to discussion on removing a load-bearing wall in a house. Attic space with wooden beams and floorboards, part of a roof structure in a single-story house, showing insulation material and angled beams under a light.

The wall I want to take down is marked in red according to the picture. Floor plan showing a red-marked wall between the kitchen and living room, indicating a load-bearing wall removal within a single-story house.

According to the construction drawing, it is load-bearing Technical blueprint with diagrams and measurements, labeled "Boro," on a wooden surface. Includes a ruler and black case at the top corner. Architectural drawing showing a structural plan of a one-story house, with highlighted bearing wall in red, indicating proposed wall removal and beam insertion.

Do I need a beam dimension? And what is the easiest way to install it? I've seen one solution is to place it up in the attic between the outer wall and the truss where there's a stud in the wall under the truss?

Grateful for answers.
Best regards,
Hampus
 
The type of trusses you have are self-supporting between the exterior walls. Therefore, no interior walls are load-bearing. Cross walls can additionally have a stabilizing function. To be safe, you can check that the upper and lower chords of the trusses have the correct dimensions considering the snow load zone and span.
 
As others have written on the forum, one hopes that you will be the one to respond, Thank you!

I will go up to the attic and measure the under and upper arm..
The span is 8m and the snow zone is 3.0.
45x170 O, 45X145 U. Have I checked correctly then?

What do you think about putting a glulam beam on top of the under arm of the truss?
For safety reasons, I think.
 
You don't need a beam. These dimensions are completely in accordance with what is recommended with regards to snow zone and span. However, it assumes that you don't load too much junk in the attic.
 
Okay.

Thank you for your answers!
 
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