Trèteaux Angles: R9-DP
R9-DP = Horizontal Plane Rotation Angle for Tilted Hip Rafter on DP Line from Footprint to Hip Rafter Run Line
Hip-Valley Roof Ratios Angle Formulas
- R9-DP = arctan( sin ( Hip Rafter Slope Angle) × tan (Hip Rafter Backing Angle ))
- R9-DP = arctan( sin ( R1 ) × tan ( C5m ))
The Trèteaux Angles Formulas for Hip Rafters Rotated into the Roof Surface Plane were developed by Sim Ayers and Joe Bartok.