Does anyone know if there is a common nuber that I can use to cut hip rafters that sit on a 22 1/2 degree angle? just as 45 degree hips are cut on 17 instead of 12.
Any imput would be appreciated
Thanks
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Replies
Must be a regular octagon.
12 ÷ cos 22.5° = 12.98871 ... generally rounded off to 13.
For a really irregular roof, with unequal pitches meeting at any corner angle:
Roof Framing and Joinery Angle Calculator
The calculators have brief descriptions and diagrams of the angles most commonly used.
Joe Bartok
Edited 7/18/2007 1:31 pm ET by JoeBartok
thanks for the info Joe, very helpful.