Download Development of Tetrahedron for Square Tail Fascia Geometry DXF
Square Tail Fascia Material Cut Laying Flat (Side of Fascia, Perpendicular to Roof Surface) Main Common Fascia Miter Angle = arctan (sin (Main Roof Pitch Angle) ÷ tan( Adjacent Plan Angle)) Main Common Fascia Saw Bevel Angle = arcsin (cos (Adjacent Rafter Pitch Angle) * cos(Main Plan Angle)) Square Tail Fascia Material Cut On Edge (Top Of Fascia, in the Plane of the Roof Surface) Main Common Fascia Miter Angle = arctan (cos (Main Roof Pitch Angle) ÷ tan( Main Plan Angle)) Main Common Fascia Saw Bevel Angle = arctan (sin (Hip Rafter Angle) ÷ tan(Adjacent Plan Angle))  Deck Angle = 90.00000 Main Plan Angle = 51.34019 Adjacent Plan Angle = 38.65981 Main Roof Pitch Angle = 33.69007 Adjacent Roof Pitch Angle = 39.80557 R1 Hip Rafter Angle = 27.50055 Main Jack Rafter Side Cut Angle = 33.64933 Adjacent Hip Rafter Backing Angle = 29.99339 90°  P2m Roof Sheathing Angle = 56.35067 Adjacent C5a Hip Rafter Backing Angle = 29.99339 90°  Adjacent C5a Hip Rafter Backing Angle = 60.00661 Square Tail Fascia Material Cut Laying Flat (Side of Fascia, Perpendicular to Roof Surface) Main Common Fascia Miter Angle = arctan (sin (Main Roof Pitch Angle) ÷ tan(Adjacent Plan Angle)) = 34.73648° Main Common Fascia Saw Bevel Angle = arcsin (cos (Adjacent Roof Pitch Angle) * cos(Main Plan Angle)) = 28.67914° Main Common Fascia Miter Angle = arctan (sin (33.69007) ÷ tan(38.65981)) = 34.73648° Main Common Fascia Saw Bevel Angle = arcsin (cos (39.80557) * cos(51.34019)) = 28.67914° or Square Tail Fascia Material Cut Laying Flat (Side of Fascia, Perpendicular to Roof Surface) Main Common Fascia Miter Angle = arctan (tan (90°  Adjacent Hip Rafter Backing Angle) * sin(90° Main Jack Rafter Side Cut Angle)) = 34.73648° Main Common Fascia Saw Bevel Angle = arcsin (sin (90°  Adjacent Hip Rafter Backing Angle ) * cos(90° Main Jack Rafter Side Cut Angle)) = 28.67914° Main Common Fascia Miter Angle = arctan (tan (90°  29.99339 ) * sin(90° 33.64933)) = 34.73648° Main Common Fascia Miter Angle = arctan (tan (60.00661) * sin(56.35057)) = 90 55.26349 = 34.73651° Main Common Fascia Saw Bevel Angle = arcsin (sin (90°  29.99339 ) * cos(90° 33.64933)) = 28.67914° Main Common Fascia Saw Bevel Angle = arcsin (sin (60.00661) * cos(56.35057)) = 28.67914° Square Tail Fascia Material Cut On Edge (Top Of Fascia, in the Plane of the Roof Surface) Main Common Fascia Miter Angle = Main Jack Rafter Side Cut Angle Main Common Fascia Saw Bevel Angle = Adjacent Hip Rafter Backing Angle Main Common Fascia Miter Angle = arctan (cos (33.69007) ÷ tan( 51.34019)) = 33.64934° Main Common Fascia Saw Bevel Angle = arctan (sin (27.50055) ÷ tan(38.65981)) = 29.99339°
Development of Tetrahedron Geometry
based on Joe Bartok's Tetrahedron Developmental Geometry
Development of Tetrahedron Geometry
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Development of Tetrahedron using Hip Rafter Backing Angle
Canadian & American Geometric Roof Framing Development Tetrahedron Calculator & DXF File
Development of Tetrahedron for Square Tail Fascia Geometry
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 SBE Builders 5305 Laguna Ct. Discovery Bay, California 94505 (925) 6346022 • Fax: (925) 6346022
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Roof Framing Geometry

Rafter Tools for Android
With Quad Tetrahedra Analytic Algorithm Technology.
Helping apprentice carpenters on their journey to becoming master carpenters with Certification in roof framing.
Crown Molding Tools
crownmoldingtools.com
Canadian & American Geometric Roof Framing Development
using a Steel Framing Square
Geometric Roof Framing Development for Irregular Hip Roof Calculations
using a Steel Framing Square
Geometric Development of Tetrahedron
using a Steel Framing Square
Hip Rafter Backing Bevel Angles from 1565 to 2013