Purlin intersects Valley
Development of Compound Angle
8/12 and 12/12 Slopes
Ridge Lines intersect at 90° in Plan
Tetrahedral Model of Compound Angle extracted from the Stick
Development of Purlin Compound Angle
Development of Purlin Compound Angle
Tetrahedron extracted from the Adjacent Face of the Purlin
Development of Purlin Compound Angle
Joe Bartok 1