Can someone give me some guidance on what timber size I should use for a felt roof with the following measurements :- Span - 2.5m Length - 4m Angle - nominally 10 degrees Covering - Sterling board and felt + insulation.
I'm assuming 600mm between centres.
Many thanks Rob
Total guess but I'd use 6x3..or bigger
4x2 seems to sag under its own weight at that sort of span..
Assuming access for maintenance only, and assuming you're at less than
100m above sea level:At 600mm C/C: 38mm x 147mm C16, 63mm x 122mm C16, or 47mm x 122mm C24.
At 400mm C/C, 47mm x 122mm C16's will span 2.48m.
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