Hello!
I have sketched a simple construction for a 2-car carport.
Approximately 7.5 x 5.5 m, straight roof beams sloping backwards at 10 degrees, supported by two pillars and a laminated beam at the front, and three pillars and a wall plate at the back. The distance between the roof beams will be 4m as the roof extends 0.5m forward and backward. According to the sizing table, 75x220 with cc600 should be sufficient for this roof, snow zone 2.0.
I'm a bit unsure about the laminated beam that will support the roof at the front to avoid a middle post. I've looked in the Swedish laminated wood handbook and calculated as follows:
snow load 1.6kN/sqm (table for snow zone 2) x safety factor 1.3 = 2.08
roof area 7.5 x 5.5 = 41.25 sqm
41.25 / 2 since the roof is supported at the front and back = 20.625
20.625 x 2.08 = 42.9kN
42.9 / 7 (beam spacing for the laminated beam) = 6.13kN/m
According to the table, the value 6kN/m with a span of 7m gives a laminated beam with dimensions 66x450.
Have I calculated correctly? What do you think overall? The idea is to create a simple and inexpensive carport.
Edit: I was thinking of a light roof made of metal or plastic and have not included the weight of the roof as it is so light.
