Replacing these 2 windows with a 3m garage door on the gable end of my premises. I have now opened up the wall on the inside, having 4 layers of gypsum and 2 layers of exterior gypsum under the paneling on the outside. The space is 6.5m long and has a glulam beam at the top instead of regular trusses, unsure what this construction is called. The 2 studs in the middle go up to the glulam beam at the ridge. I now need to place a glulam beam above the garage door as well as double 120 x 45 studs on each side. I am trying to Google which dimension I should have for the glulam beam, but it doesn't work with my construction (Checking Svenskt Trä, building descriptions). Perhaps someone can help me calculate it. Roof pitch 27 degrees, metal roof and snow zone 2.5.
Apparently, I hadn't understood the B1 and B2 dimensions correctly, entered the wrong widths there, hence the error. I now get a glulam beam of 115×270 GL30c.
With the measurements you provide and what one can guess from the picture, it looks like you have a roof area of about 40 sqm. Which should give a total weight of 10 - 12 tons. Half of it rests on the ridge beam, and half of the ridge beam's load should be transferred down to your new beam, which would then have a point load of about 3 tons in the middle.
But if you've put the right numbers into the calculation, you should probably be able to trust it.
Yes, it's about 40m2 of roof. The calculation on Svenskt trä doesn't consider what type of roof it is, for the sake of weight. If I need to go up in dimension, is it better in width or height then? A 120 wide would fit, and I can decide the height freely.
The width is usually standard for glulam. It is mainly the height that is important for the beam's strength. Therefore, beams are usually narrow and tall, not, for example, square.
Beijer has a 115 x 315, that'll do, the next size is over 400, seems like overkill.
Svenskt Trä recommends 90 x 90 laminated wood for the side posts, (Utilization rate 30% it says, does that mean 30% of the strength of the post is used?), I was thinking of using double 120 x 45. Will that work? I thought that I'm removing 4 120 beams, so I'll replace with 4. I can also install 3 double posts, there's room. Is laminated wood also stronger as posts?
Now the intervention is presumably a building permit-required change, so if you have applied for a building permit, the beam should be calculated. But if not, I would have gotten the largest beam that can be placed there without major issues.
I did something similar and used a type 160*360, don't remember exactly, but the carpenter who helped me thought it was very large...
Same with the columns, place as much as you can.
Glulam beams aren't expensive when it's just one, I think mine was under 2000.
Personally, I would use 3 pcs 245x45, screwing them together and additionally gluing them with boatbuilding glue for wood
I can't get 245 in there, space is 120, max is 165 if I also cut the horizontal 45 x 45 on the outside. But I can get 3 in there though, glue is good, I'll do that.
Oh, you mean instead of the "limträbalk" (don't know the english word for it). I was thinking about the poles holding it up. I already bought one now, 315 x 115, but thanks anyways.
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