This purlin ridge to king post example shows a ridge connecting to the top of a king post, if you are using purlins in your roof framing system. It may look hard to cut but trust me it looks harder than it is. The simplest way to beaver out this joint it is to use a mortiser to cut the tenon, then cut the roof pitch angle on the king post. After that a little clean up with a chisel is all that is needed. It is held together with two pegs, allowing a nice clean looking joint. If the tenon is not needed or wanted you can attach the ridge to the king post with a couple of structural screws.