Hello,
We are drafting a pergola that will be attached to the house on one side.
We would prefer to avoid a post that would otherwise be natural on one of the long sides, which will be about 6m.
The question is whether it is possible with a 6m glulam beam and if so, what dimension?
I have tried the wood guide but am no wiser: https://www.byggbeskrivningar.se/dimensionering/vidbyggd-carport/
No roof, but a metal mesh on parts of the pergola.
Snow zone 1.5
Grateful for help here!
We are drafting a pergola that will be attached to the house on one side.
We would prefer to avoid a post that would otherwise be natural on one of the long sides, which will be about 6m.
The question is whether it is possible with a 6m glulam beam and if so, what dimension?
I have tried the wood guide but am no wiser: https://www.byggbeskrivningar.se/dimensionering/vidbyggd-carport/
No roof, but a metal mesh on parts of the pergola.
Snow zone 1.5
Grateful for help here!
It becomes a variant of the Indian rope trick, which neither you nor I likely believe in. The outer beam needs another support. If you don't want a pole, you can try with a cable attached to the facade a bit higher up. Or you can make a pylon that holds up the roof at Nya Ullevi.
Thanks for the reply! I should have been clearer, I realize. The side with 4577mm will be attached to the house facade. The question is whether a glued laminated timber beam of about 6m (in the sketch the side with 6244mm) is sufficient, or if there needs to be an extra post between the outer post in the sketch and the house wall?J justusandersson said:
Haha, that was a bit of an unusual situation! If it's just a pergola, i.e., no roofing arrangement, the beam only needs to support its own weight and some cross beams. In that case, a glulam beam in minimum dimension, i.e., 42x180 mm, will suffice. If you reduce the length to 6 meters, you can use stock lengths; otherwise, you'll need to place a special order (no big deal9.
Sure, it will be a bit different 
The weight that is beyond the frame will, as you said, be the cross-bracing. Possibly a metal mesh or perforated plate over half. Not sure about the exact weight, but maybe 100kg.
If we go up to 56*225, do you think it can span 6m?
The weight that is beyond the frame will, as you said, be the cross-bracing. Possibly a metal mesh or perforated plate over half. Not sure about the exact weight, but maybe 100kg.
If we go up to 56*225, do you think it can span 6m?
It is a matter of very low loads. What to keep in mind is both that the outdoor environment requires overdimensioning and that you also need to take aesthetic considerations into account, meaning it should look nice over a long period. This is difficult to assess. I would probably choose 90x225.