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The distance between the rafters in the roof construction usually decides the size of the windows if cutting them and install- ing trimmers is not an option. Therefore, first check whether the position chosen and size of the roof windows fit into the existing roof construction or if rafters will...

Ah yes sorry The. 8x2 combo beam is against a wall however not attached. It is supported by two columns of the same make up, at each end. These columns are attached to the front (low end ) beam by diagonal braces. The structure is a free standing timber frame with a lean to roof. The low...

Hi I'm currently building an extension with a lean to. The rafters will be spanning 3.3m at an angle of 18 degrees. The high end of the rafters will sit on a beam spanning 6.5m. I intend to combine 8x2 s to form an 8x8. Fully pinned with coach bolts at 400mm centres. The roof will be Kent...