Trèteaux Angles: D-DP
D-DP = Horizontal Plane Rotation Angle for Tilted Hip Rafter on DP Line from Eave Line to Hip Rafter Footprint
Hip-Valley Roof Ratios Angle Formulas
- D-DP = Adjacent Plan Angle - R9
- D-DP = D - R9
The Trèteaux Angles Formulas for Hip Rafters Rotated into the Roof Surface Plane were developed by Sim Ayers and Joe Bartok.