Online Roof Framing Rafter Tools & Calculators


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. 

Rafter Tools for Android Help Files


Crown Molding Tools 

Roof Framing Geometry Blog


World Skills International Competition Roof Design


Hip Rake Walls Rotated Into The Roof Surface
Tim Uhler framed a house with a hip rake wall that was rotated into the roof surface. This hip rake wall can be calculated using Rafter Tools, Plan A Calculator. To use this Rake Wall Calculator scroll left in Rafter Tools until the Rake Wall Angles calculator is displayed. 

Segmental Arches  Gothic Arches  Lofting Ellipses  Groin Vaults


Hip Rafter Offset for Hexagon and Octagon Roof Framing


Roof Framing Polygon Angles


Unconstructable Irregular Roof Framing and My Android App
Here's a screen shot of my Android Frieze Block Miter Angle & Saw Blade Bevel Angle app showing Minor Tetra Angle = 22.99236°. This is another good example of the different math functions on different platforms and different devices calculating different angles when the roof is unconstructable to begin with. The Minor Tetra Angle is from an function that I wrote that tries to draw the 2 tetrahedrons for the 2 different pitches. If the 2 tetrahedrons don't align with the hip rafter than the roof is unconstructable.


Apprentice Carpentry Roof Framing Geometry Part 1


Apprentice Carpentry Roof Framing Geometry Part 2


Chappell Master Framing Square and the Purlin Lip Cut Angle


Chappell Master Framing Square Unequal Pitched Roof Review


Ad Quadratum  Seed of Life  Ad Triangulum Router Templates


Hexagon and Octagon Roof Framing Geometry


Eyebrow & Barrel Roof Dormer Structural Design


Eyebrow & Barrel Roof Dormer Structural Design


Google SketchUp Plugin  Roof Framing Geometry Version 1.1


Skewed Rafter Saw Blade Bevel Angle
The Trapezoidal Timber generated from the Roof Framing Geometry plugin based on the Skewed Rafter on page 52 in "Traité Théorique et Pratique de Charpente" by Louis Mazerolle. 

Tetrahedron Extracted From Jack Rafter Side Cut At Hip Rafter


Tetrahedron Trigonometric Identity Formulas
The Tetrahedron Trigonometric Identity Formulas by Joe Bartok are what I consider the most important roof framing document developed over the last 100 years. The Timber Framing Hawkindale Angle Formulas developed by Rees Acheson from the Martindale Hip and Valley Roof Angles and edited by Ed Levin of the Timber Framers Guild was the first Tetrahedron development for roof framing angles, but Joe Bartok's Tetrahedron Trigonometric Identity Formulas gave us the ability to find the roof framing angles in any type of Tetrahedron. 

Steps To Extract a Tetrahedron In Google SketchUp


Timber Porn
Billy Dillon called my copy of "Traité Théorique et Pratique de Charpente" by Louis Mazerolle Timber Porn and it pretty much stayed a porn book on Stereotomy geometry until I read through Tim Moore's blog on Stereotomy. The Trapezoidal Ground Plan on page 52 was meant to be an exercise in Theorie des dévers de pas et des niveaux dévers. level cant ?? or level slope?? 

Traité Théorique et Pratique de Charpente
Tim Moore's blog on Stereotomy. The art of representing objects in section, elevation and plan in order to cut them out.  Louis Mazerolle Tim has some excellent graphic image drawings of devers de pas. The DP line or the angle of projection line and he has done a great job of explaining how to develop the devers de pas. 

X Marks the Spot
This drawing was developed from Chris Halls series X marks the spot. The hip rafter foot print was developed from the typical dihedral angle geometry. 

Dormer Shed Roof Rafter Calculator 

CutIn Dormer Shed Roof Rafter Calculator 

Pitch Break Shed Roof Rafter Calculator 

Barrel Roof Dormer Framing Calculator 

Eyebrow Roof Dormer Framing Calculator 

Chappell Master Framing Square Review The only Stainless Steel framing square Made in USA 

Tangent Hand Railing Trigonometric Development 

Tangent Handrailing Section Planes and Tetrahedron Angles 

Developments of Hip and Valley Roof Angles based on the Roof Lines , by Joe Bartok 

Compound Saw Miter and Saw Blade Bevel angles for building the 5 Platonic Solids out of wood Wood polyhedron or Wooden Polyhedra The 5 Platonic solids: The Tetrahedron (3 equilateral triangles at each vertex) The Hexahedron (3 squares at each vertex, cube) The Octahedron (4 equilateral triangles at each vertex) The Dodecahedron (3 pentagons at each vertex) The Icosahedron (5 equilateral triangles at each vertex)
Archimedean Solids with Jack Rafter Side Cut Angles & Hip Rafter Backing Angles & Dihedral Angles
Platonic Solids or Archimedeans Solids Tetrahedron Geometric Development Calculator Tetrahedron Jack Rafter Side Cut & Hip Rafter Angle Development Calculator 

Hip Rake Wall Calculations For Plan A
Polygon Rafter Tables
Use of the Framing Square for Octagonal Roofs
Polygon Rafter Tables all in one PDF file
Eagle Square Manufacturing Co., (South Shaftsbury, Vt.),the Octagon Framing Square that real
roofers used !


A lesson in Applied Geometry and Euclidean Geometry Medieval Gothic Cathedral Table Medieval Gothic Cathedral Elliptical Cross Vault Drawings Medieval vaulting research links, keywords Treatise On Those Parts of Geometry Needed by Craftsmen 

Compound Miter and Bevel Calculator, To cut compound angles on the edge of the material instead of laying flat in the compound miter saw 

Hopper Miter and Saw Bevel Angles Calculator


Bosch DAF220K Miter finder Digital Angle Finder Helper This script will return crown molding miter and bevel settings for the given corner angle. It is not for checking the Bosch DAF220K Miter finder Digital Angle Finder, it is to check the user's ability to use the Bosch DAF220K Miter finder Digital Angle Finder correctly. 

Elliptical Hip Rafter Calculations For X Axis Plotting for radius rafter tails Curved Hip Rafters and Flared Eaves that are common on Witched Gambrel houses, Dutch Colonial, Flemish Colonial and French Huguenot Colonial houses. Also, on Mansard roofs from France that had a eave kick out. "coyautage" in French or flying gutter by the Flemish. 

Eyebrow Roof Dormer Design and Geometry based on Billy's Dillons Eyebrow Roof Dormer Class 

Canadian & American Geometric Roof Framing Development using a Steel Framing Square 

Roof Framing Kernel drawing for visualization posterboard cut out model 

Roof Framing Kernel drawing for visualization posterboard cut out model with edge fold 

Canadian & American Geometric Roof Framing Development Tetrahedron Calculator & DXF File 

Tetrahedron drawings for 8:12 pitch 

Tetrahedron drawings for Crown Molding with 38° Spring Angle 

Sloped Frustum of Pyramid Calculations for Polygons or Cones Roof Framing Geometry Sloped Frustum of Pyramid Calculator 

Octagon Roof Framing and Crown Molding Angles Development 

Build it Green Advanced Wall Framing Compliance Calculator 

Advanced Rake Wall Framing Compliance Calculator  
Irregular Hips Geometry based on Billy Dillon's article in the Sept. 2007 JLC, On Complex Roof Geometry Irregular Hips Geometry Calculator 

Irregular Hips Geometry based on Joe Fusco's Hip Roof Developmental Geometry Irregular Hips Geometry Calculator 

Unequal Pitch Roof With Unequal Height Plate Line Rafters Unequal Pitch Roof With Unequal Height Plate Line Calculator 

Unequal Pitched Roof Gable Rafters Unequal Pitched Roof Gable Calculator 

Development of Tetrahedron Geometry based on Joe Bartok's Tetrahedron Developmental Geometry Development of Tetrahedron Geometry Development of Tetrahedron and Dihedral Angle for Polygons Development of Tetrahedron for Compound Angles Geometry Development of Tetrahedron for Purlin Geometry Canadian & American Geometric Roof Framing Development Tetrahedron Calculator & DXF File Development of Tetrahedron for Square Hung Fascia Geometry Development of Tetrahedron for Hawkindale Formulas Geometry Development of Tetrahedron for Crown Molding Geometry Using Spring Angle and Corner Wall Angle Development of Tetrahedron for Crown Molding Geometry Using Slope Angle and Corner Plane Angle Development of Tetrahedron for Crown Rake Molding Geometry 

Hip Roof Developmental Geometry for Polygons Polygon Geometry Calculator 

Development of the 6 Tetrahedrons for Crown Molding Angles Crown Molding Angles Fully Developed Trigonometric Crown Angle Formulas for Horizontal Plane Crown Molding Angles Trigonometric Crown Angle Formulas for Vertical Plane Crown Molding (cathedral/vaulted ceilings/rake gables)Angles 

Crown Moulding Miter Angle and Bevel Angle Settings Crown Spring Angle = 52° Crown Spring Angle = 45° Crown Spring Angle = 38° Wall Angle Settings Rake Crown Spring Angle = 38° Rake to Horizontal Crown Spring Angle = 38° Polygon 2 Cord Exterior Rake Gable Crown Molding Miter Angle and Bevel Angle Settings Polygon 2 Cord Interior Rake Gable Crown Molding Miter Angle and Bevel Angle Settings Polygon Crown Molding Angles Development & Calculator 



Height Above Plate Matching Rafter Calculator  
Height Above Plate Rafter Calculator  
Height Above Plate Hip Rafter Calculator  With Equal or Unequal Pitchs  
Bowed Bay Window Rafter Calculator with Unequal Overhang Runs  
Circular Tower Structural Ring Rafter Calculator  
Octagon Tower Structural Ring Rafter Calculator  
Natural Trigonometric Functions Natural Trigonometric Functions to 5 Decimal Places for Pitch or Angle for Trace Geometry Development  
Natural Trigonometric Functions Table Natural Trigonometric Functions to 5 Decimal Places Table for Trace Geometry Development  
Developmental Geometry for a Pyramid with an (5 sided) Polygonal Base ... pentagon  
Developmental Geometry for a Pyramid with an (6 sided) Polygonal Base ... hexagon  
Developmental Geometry for a Pyramid with an (7 sided) Polygonal Base ... heptagon  
Developmental Geometry for a Pyramid with an (8 sided) Polygonal Base ... octagon  
Developmental Geometry for a Pyramid with an (9 sided) Polygonal Base ... enneagon  
Developmental Geometry for a Pyramid with an (10 sided) Polygonal Base ... decagon  
Developmental Geometry for a Pyramid with an (11 sided) Polygonal Base ... hendecagon  
Developmental Geometry for a Pyramid with an (12 sided) Polygonal Base ... dodecagon  
Developmental Geometry for a Pyramid with an (16 sided) Polygonal Base ... hexadecagon  
Developmental Geometry for a Pyramid with an (24 sided) Polygonal Base  
Developmental Geometry for a Pyramid with an (36 sided) Polygonal Base  
Developmental Geometry for a Pyramid with an (96 sided) Polygonal Base 
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 SBE Builders 5305 Laguna Ct. Discovery Bay, California 94505 (925) 6346022 • Fax: (925) 6346022
Commercial & Residential Framing Contractor Build it Green Framing Contractor American Carpenter and Builder California Licensed General Building Contractor CA LIC.# 546126 Expert Witness for Construction Structural defects 
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