Hello, I have just bought a 70s single-story house with a basement and am planning to move the kitchen to create an open floor plan with the kitchen and living room. The roof has a 15-degree slope with concrete tiles and snow zone 2.0-2.5.

Now to my question, I want to demolish the load-bearing interior wall that the red arrow points to and would need help with determining the dimension I should use for a laminated beam.

I would preferably like to open up the entire wall with a span of 4538, I am considering 115x270 or 140x270, is that too weak?
 
  • Blueprint of a 1970s house plan showing structural details, with a red arrow indicating a load-bearing wall to be removed for open layout renovation.
  • Blueprint of a 1970s single-story house with basement, featuring a red arrow pointing to a load-bearing wall proposed for removal in kitchen renovation project.
You need to do it the right way. A konstruktör can be a good start.

Don't forget bygglov/anmälan

Good luck!
 
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BirgitS
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Beijer byggmaterial has on its website a program for dimensioning glulam beams. Google it. There you fill in several measurement variables such as house width and roof pitch, etc. Then you get a suggestion for a beam. That's what I did and increased a dimension because there was too much deflection. You can print it out and then inquire from the supplier you wish to purchase from.
 
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