Today we spent the whole day on an oblique roof which was done as a class. The roof wasn't as big as some of the others we have done but there was still quite a bit in it. To start off with we leveled 2 benches and then set out plate for rafters to sit on. The plates made a shape that was square at one end and at about 15 degrees on the other end. Once that was done we made sure the whole thing was square and that the 2 longer sides were parallel.
After that we then measured the length of all the sides one of which gave us the half span and wrote them done on the board. We then used those lengths to determine the offsets for the long and short side. The formula to work out the offset on the short side is (short side add Oblique end) take long side divide by 2 and the formula to find out the long side is the same except the long side and short side are swapped around.
Once that was done and the working out was done the cutting was pretty straight forward because we had all the bevels but it was annoying because some needed to be cut on an angle greater than 50 degrees and our saws cant do that. After i got past that the only thing i had trouble with was the creeper shortening but after a bit of problem solving i came up with my own way that was easier and quicker for me to do.
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