I'm planning to build myself a boathouse and came across 4 glue-laminated beams in varying sizes, so why not try building with a vaulted roof; however, they are in class GL28cs.
I have:
No.1: 6000x270x77
No.2: 5900x250x55
No.3: 4400x250x55
No.4: 5400x400x60
A 90x405 (preferably 90x450) class GL30c is required according to the drawing.
I thought I would use No.1 77x270 but reinforce it on each side with perhaps a 45x195/220 either finger-jointed 6m or just 5.4m+splice piece.
Option 2 is to nail it together with beam No. 2 with possible additional reinforcement.
Worst case is to install a truss after 3m, but that's not as fun.
It is not within a densely populated area.
Snow load zone 3.5
Sheet metal roof Tp-20 without an inner ceiling but with sheathing.
I have:
No.1: 6000x270x77
No.2: 5900x250x55
No.3: 4400x250x55
No.4: 5400x400x60
A 90x405 (preferably 90x450) class GL30c is required according to the drawing.
I thought I would use No.1 77x270 but reinforce it on each side with perhaps a 45x195/220 either finger-jointed 6m or just 5.4m+splice piece.
Option 2 is to nail it together with beam No. 2 with possible additional reinforcement.
Worst case is to install a truss after 3m, but that's not as fun.
It is not within a densely populated area.
Snow load zone 3.5
Sheet metal roof Tp-20 without an inner ceiling but with sheathing.
The deflection is mostly counteracted by the height of the beam. In terms of strength, what you propose (270+45x220 on the sides) is significantly worse than a 405 beam. In principle, 45x220 probably adds nothing more than weight.
If you're going to add on, do it in height. Gluing and screwing are a must, and glue-screw an 18mm construction plywood on each side of the beam.
If the recommendations come from svenskt trä, then they are quite generous. But considering that you won't get the same strength in homemade constructions, it might even out.
Personally, I would have gone with regular rafters.
If you're going to add on, do it in height. Gluing and screwing are a must, and glue-screw an 18mm construction plywood on each side of the beam.
If the recommendations come from svenskt trä, then they are quite generous. But considering that you won't get the same strength in homemade constructions, it might even out.
Personally, I would have gone with regular rafters.
Hmm surely 45x220 must add more than just weight?
Otherwise, option 2 would be to screw it together with beam no. 2?
With 2x 45g angles in each post🤔
I also think that there is definitely a 25% safety margin from Swedish wood, and it is, after all, a boathouse.
Otherwise, option 2 would be to screw it together with beam no. 2?
With 2x 45g angles in each post🤔
I also think that there is definitely a 25% safety margin from Swedish wood, and it is, after all, a boathouse.