Study of Chamfer Cut or Shelf Cut
at intersection of
Valley Rafter Foot with Principal Common Rafter

Model of Principal Common Rafter housing to accommodate Valley Rafter Foot

Model of Valley Rafter Foot with Shelf Cut, Tenon and Layover Extension
Valley Rafter Foot intersects Principal Common Rafter
Chamfer Cut extracted from the Valley Foot
Compound Angle and Shelf Cut at the Valley Rafter Foot
Compound Angle at the Valley Rafter Foot ... Parallel Square Cuts
Compound Angle at the Valley Rafter Foot ... exploded view of Parallel Square Cuts
Tetrahedron extracted from Compound Angle modeling the Shelf Cut at the Valley Rafter Foot
Development of Tetrahedron modeling the Shelf Cut

Development of General Tetrahedron composed of Right Triangles
Overview of Tetrahedra and Triangles defining a Hip or Valley Roof

Joe Bartok