I recently helped a friend build a 12x16 storage shed and as we were putting up the rafters, I did a few "dips" between the rafters and realized the angle was perfect.
I have a Body Solid dip station and it has always been a little uncomfortable when using so I decided to give it a 5/12 pitch angle....not sure what angle that is!? I just used a framing square to mark it out on the risers.
This was a pretty easy fix using my swivel bandsaw and the 250EX Tig.