7 9 8 or coffin by brotherhood

This is the 7-9-8 cut or coffin cut.  In my opinion the best way to open a roof in a sequence.  We use this method but with two saws if possible.  If the second sawyer comes up on the roof and sees a 7 he starts on the 9 and so on with out any communication.  If you run into a lot of built up roofs like we do you have to do a step cut (see below) because the saw will not go deep enough to cut all the way through.  If you want the final hole to be 4x8 then you make the first cut through half the material 5x9.  Then you cut inside that cut loosing some real estate and make it through the rest of the material.  You finish with a 4x8 hole.

Thanks Brotherhood Instructors, good video.