Devers de pas Sloping Ridge Dormer

Sloping Ridge Dormer drawn out using dever de pas for the jack rafter perpendicular to the roof surface. After I developed the geometric drawing I realized I had done a great job developing the trigonometry for devers de pas for my Rafter Tools apps, but never developed the geometry to actually draw out the  rafter. Time to open up Louis Mazerolle's book, Traite Theorique Et Pratique De Charpente again.