SQUARE CUT FASCIA : Models of Hip Rafter Foot

Formulas and Example Calculations
Drawings of Square Cut Fascia Models

Main Span Pitch = 7 ÷ 12 , Adjacent Span Pitch = 12 ÷ 12
Total Deck Angle or Angle in Plan between Hip Eaves = 90°

Models of Hip Roof and Reciprocal Pitch Square Cut Fascia Planes
Model of Hip Roof Planes and
Square Cut Fascia Reciprocal Pitch Planes
Sketches of Hip Roof and Square Cut Fascia Planes

Worm's-Eye View of Reciprocal Pitch Square Cut Fascia Planes
Worm's-Eye view of Square Cut Fascia Model
Square Cut Fascia Miter and Bevel Angles

Hip Rafter Foot : Major (7/12) Span compound angle for SQUARE CUT FASCIA
Compound Angle on Major Span (7 ÷ 12)
Miter = 7.29001° , Bevel = 25.80013°

Hip Rafter Foot : Minor (12/12) Span compound angle for SQUARE CUT FASCIA
Compound Angle on Minor Span (12 ÷ 12)
Miter = 36.51558° , Bevel = 37.64621°

Hip Rafter Foot : Line of Intercept between planes of compound angles for SQUARE CUT FASCIA
Line of Intercept between planes of the Compound Angles
on the Hip Rafter and the planes of the Square Cut Fascia

Valley Rafter Peak : Valley meets Valley and Main Purlin
Valley Peak meets Main Purlin :
Main Pitch = 10 ÷ 12 , Adjacent Pitch = 10 ÷ 12
Total Deck Angle or Angle in Plan between Hip Eaves = 90°
This is intercept of planes and lines is exactly equivalent to
Hip Foot meets Square Cut Fascia and Plumb Fascia

Joe Bartok