On friday we had to construct a small scale oblique end roof based on the brown paper drawing we had previously drawn up. Each of us had a different pitch, except for Dan and I because my drawing was out of square, it meant that my cuts wouldn't work properly. The pitch i was working at was 30 degrees. From the drawing we could align the bevel and then transfer the bevel onto the corresponding part of the roof, so for example you could get the hip bevel from the drawing and then use it to cut a hip.
We started off with a simple plate system of a roof that had an oblique end and then by using what we had learned about oblique roofs, marked out the half spans and also the positions of the long hip return and the short hip return, and finally on the end, the jack rafter position.
The short hip return (B) is exactly the same length as the Jack positioning (A).
First of all i cut the centring rafters and the other common rafters. I obtained their length by the simple equation of - (Halfspan / Cos(30)) - 12. For this i didn't want any overhang on my rafters so i made a 90mm birdsmouth, which would fit flush with the end of the plate.
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