2.Hip and Valley Rafter Backing Angles
Hip/Valley Rafter Backing Angle Chart in decimal inches ... Plumb Backing Angle Rise = Backing Angle Rise ÷ cos Hip Pitch Angle...
3.HOMETIME, How-To Decks
The angles for the plumb cut (which you also need at the end of the rafter) and the seat cut are determined by your roof pitch, and they're listed in roof ...