Hello! I am planning to build a mono-pitched roof on my house. It will have a 13.2-degree slope and will be laid on a concrete frame from Skanska. There is about 8.1 meters between the outer walls, and on that span, I will place 11 SJ90 Hunton I-beams, which are 500mm high, with a center-to-center distance of 1200mm and a length of 9.5m (the wall thickness is 37cm). Then there will be inner panel/plastic, outer panel/plastic/batten/roof tile plate and such according to standard building regulations. To support the middle, I plan to place glulam beams measuring 42x225mm (maximum span of 6.4 meters at the longest point) horizontally - three supports in total. These will have notches in the concrete elements to sit extra stable. Loose-fill insulation will then be blown into the "compartments" formed between the beams.
Do you think that could be sufficient? I have tried to decipher Hunton's span tables, but it’s all Greek to me.
I live in Gotland with a snow zone of 2.5...
Grateful for input on the matter.
