Suka2

This task model was suppose to be a study of the under purlin rafter with lip cut, lower claw, intersecting a valley rafter. Well, now it's grown into a study of mortise and tenons as well. After looking at the last two Timber Framing Guild projects I decided I needed to add a mortise or two to the task model. The task model now has 12 mortises. The ridges, post, knee braces and jack rafters now have mortises with tenons. Nothing special about the mortises at the ridges, post and knee braces. However, the jack rafters have a square cut tenon. The only thing I really knew about the square cut tenon on the jack rafters was from reading " When Roofs Collide" by Will Beemer of the Timber Framing School of Heartwood in Washington, Massachusetts. www.heartwoodschool.com In Will's article he explains how to develop the jack rafter tenon on the folding roof surface and goes onto explain how to use the Hawkindale Angles , P2, P5 and A9 for the mortise tenon layout on the hip