Dimension of Beam, Posts and Roof Beams

[Fredrik Rutberg]

Hi,

I am planning to build a roof (lean-to) of 15 m2 (5 in length and 3 in width) and I'm choosing between glass and polycarbonate sheets. Regardless of the choice, it will be a cassette system with either 3 or 4 rows and thus CC 75 or CC100 between the roof beams. At the front, there will be two posts 3 meters apart and at the back, the roof beams will rest on a load-bearing beam. On one long side, there will also be an extra post allowing us to easily build a trellis. What dimension is reasonable for the load-bearing beam, posts, and roof beams in the different cases? At the hardware store, they couldn't calculate it and thus suggested that the posts be glulam pillars 115mm*115mm and the roof beams be glulam beams 66mm*315mm.

I live in snow zone 2.

I appreciate any help I can get.
Fredrik

 

[ToreJ01]

Hello,

I am going to build a lean-to roof of 15 m2 (5 in length and 3 in width) and am deciding between glass and channel plates. Regardless, it will be a cassette system with either 3 or 4 rows and then CC 75 or CC100 between the rafters. In the front, there will be two posts with a 3-meter distance, and at the back, the rafters will rest on a beam. On one long side, there will also be an extra post which allows us to easily build a trellis. What dimension is reasonable for the beam, posts, and rafters in the different cases? At the building supply store, they couldn't calculate it and then suggested going bigger with glue-laminated posts 115mm*115mm and rafters as laminated beams 66mm*315mm.

I live in snow zone 2.

Grateful for all the help I can get.
Fredrik

This is probably how it should be.
Max between the purlins is 1000mm