Rafter Tools for Android

With Quad Tetrahedra Analytic Algorithm Technology
Helping carpenters on their journey to becoming master carpenters with Certification in roof framing. We are the professionals for the future of the craft of carpentry.
Current version 2.62, with Automatic Updates

Rafter Tools

Rafter Tools is an android app with functions to calculate complex roof framing angles that other roof framing calculators don't offer. Calculating common rafters with a construction calculator is fairly easy, but to be a master carpenter you need more roof framing angle information then the construction calculators offers. With the Rafter Tools android app you'll be able to calculate all of the complex angles for roof framing. As an American Carpenter & Builder I've written this roof framing calculator as a roof framing geometry and trigonometry learning tool as well as a roof framing rafter calculator that can be used to build simple gable roofs to the most complex unequal pitched roofs with roof eave angles greater than 90°. The Rafter Tools app has Quad Tetrahedra Analytic Algorithm Technology to help prevent unconstructable user input. The Rafter Tools app has support for any roof eave angle from 30° to 180° as well as irregular hip roofs. All of the roof framing functions are case studies from my book "Holy Grail of Roof Framing Geometry & Trigonometry" .

The app's main screen uses a left swipe motion to display all of the different calculators.

Rafter Tools

Calculations in Metric or Imperial Units or Base 10

Imperial/English uses the American standard rise over 12"
Metric Millimeters uses the rise in mm over 300mm
Decimal Inch base 10 uses the rise in decimal fractions over 10

    User Input Menu Mode
  1. Imperial/English Inch base 12 —— default.. uses American standard pitches over 12.
  2. Metric 300mm base —— 300mm is 11.81102 inches, similar usage to the American framing squares printed in inches.
  3. Decimal Inch base 10 —— use this option when working with tangents or using the Chappell Master Framing Square
    multiply the tangent of the angle by 10
  4. Degrees

The output mode selection can be completely different from the input mode

    Output Menu Mode
  1. Imperial/English Inch base 12 —— default.. uses American standard pitches over 12.
  2. Metric 300mm base —— 300mm is 11.81102 inches, similar usage to the American framing squares.
  3. Decimal Inch base 10 —— use this option when working with tangents or using the Chappell Master Framing Square

No Metric to Inches Conversions are required. Enter the pitch in inches and see the results in Metric. French Compagnon charpentiers can work right along side of American carpenters or Australian and British chippys without worring about coverting between Metric, Imperial or Base 10.

Rafter Tools

Current version 2.62 functions supported:

  1. Frieze Block Angles
  2. Purlin Rafter Angles
  3. Square Tail Fascia Angles
  4. Bay Window Roof Rafters
    Rafter Tools
  5. Hexagon Rafter Angles & Lengths
  6. Octagon Rafter Angles & Lengths
  7. Dodecagon Rafter Angles & Lengths
  8. Polygon Rafter Angles & Lengths

  9. Rafter Tools
  10. Timber Framing Angles
    Rafter Tools
  11. Hawkindale Angles
    Use SS or S with DD or D to find the rest of the angles Timber Framing Angles or Hawkindale Angles.
    Rafter Tools
  12. Hip/ Valley Rafter Roof Angles for equal and unequal roof pitches for any plan angle
    • Hip Rafter Backing Angles
    • Hip Rafter Plumb Backing Angle
    • Hip Rafter Side Cut Angles
    • Jack Rafter Side Cut Angles
    • Roof Sheathing Angles
    • Hip Rafter Purlin Housing Angles
    • Hip Rafter Diamond Post Miter & Saw Blade Bevel Angles
    • Plywood Roof Sheathing Offset Cut Line
    • Valley Sleeper Miter & Saw Blade Bevel Angles
    • Dormer Square Tail Miter & Saw Blade Bevel Angles
    • Purlin Rafter Miter & Saw Blade Bevel Angles
    • Purlin Layover cut perpendicular to roof surface plane
    • Purlin Layover cut in the plane of the roof surface
  13. Irregular Hip roof Rafters
    Rafter Tools
  14. Irregular Hip roof Rafters With Equal Overhang
    Rafter Tools
    Rafter Tools
  15. Rake walls.
    Rafter Tools
  16. Hip Rake walls rotated into roof surface plane.
    Rafter Tools
    Rafter Tools
  17. Carpentry Certification in roof framing Trigonometry and Geometry.
  18. Tetrahedron Angles Calculator and Tetrahedron Framing Square Usage
    Rafter Tools
  19. Dihedral Angles
  20. French Compagnon Roof Framing Kernel Angles and Framing Square Usage to geometrically draw out a bastard hip using a framing square.
  21. Crown Molding Miter and Bevel Angles Calculator for Compound Miter Saw Settings and Rake Crown Molding Miter and Bevel Angles,Polygon Crown Molding Miter and Bevel Angles, Radius Bullnose Crown Molding Miter and Bevel Angles and width, Horizontal to Rake Crown Molding Miter and Bevel Angles .
  22. Hopper Angles
  23. Jack Rafter Plumb Layout Marks on Hip Rafter
  24. Unequal Pitched Gable Rafters with Unequal Plate Heights
    You can use it as a simple equal pitched gable rafter calculator or use it to calculate unequal pitched gable roofs with unequal plate heights.
  • Alhambra Granada Ad Quadratum Ground Plan Roof Rafters
  • Rafter Tools
  • Clipped Hip Rafter Octagon Roof Framing
  • Prow Rafter Roof Framing Angles
  • Octagon Roof Framing 4 Butt Hip Rafter Method
  • Octagon Roof Framing 4 Butt Hip Rafter Method with Purlin Structural Ring
  • Octagon Roof Framing With Hip Rafters Mitered
  • Octagon Roof Framing with Gazebo Cupola
  • Law of Sines Formulas Reference Sheet
  • Rectangular Pyramid Hip Roof Geometric & Trigonometric Roof Framing Development for Bastard Hip Roofs
  • Rafter Tools
  • CutIn Dormer Shed Roof Rafter Calculator
  • Pitch Break Shed Roof Rafter Calculator
  • Dormer Shed Roof Rafter Calculator
  • devers de pas for Skewed Rafters rotated into the roof surface plane
  • Circular Stairs
  • Spiral - Helical Stairs
  • Tangent Hand Railing
  • Trapezoid With Unequal Overhang
  • Trapezoid With Equal Overhang
  • Platonic Solids
  • Archimedean Solids

    Rafter Tools App current version 2.62

    Functions that will be added soon:

    Rafter Bevel Angles App current version 1.06

    1. Jack Rafter Plumb To Earth Bevel Angles.
    2. Jack Rafter Plumb To Earth Offset Bevel Angles.
    3. Jack Rafter Plumb To Roof Surface  Offset Bevel Angles.
    4. Rafter Plumb To Earth  Offset Bevel Angles.
    5. Crossing Jack Rafters Plumb To Roof Surface Bevel Angles.
    6. Saint Andre Cross Rafters Plumb To Roof Surface Bevel Angles.
    7. Purlin Rafter Plumb To Roof Surface Bevel Angles
    8. Witches Cut on Hip Rafter with Square Tail Rafters Berechnung der Hexenschnittschmiegen,
    9. Hip Rafter Edge Bevel Angles, Backing Angles, Dihedral Angle
    10. Devers De Pas for Jack Rafters Plumb To Roof Surface
    11. tréteau à dévers... Trestles with tilt... Hip Rafters Rotated into the Roof Surface Plane.
    12. Claw Lines for the Draw Down Layout Technique

    All bevel angles are referenced from the traditional layout method used by the French and Germans carpenters.
    This app is for the WorldSkills Carpentry Competition training. With this app the carpenter can verify their geometric layout method while using the traditional layout geometry. It has seat lip cut angles at the hip rafter for all of different types of rotated rafters as well as Hexenschnitt Gratsparren.
    Use with the French Rabattement de Surface method (folding) or the German Flachenklappung method.Basiswissen Schiften or Charpente Les Traces.

  • SBE Builders
    www.sbebuilders.com

    American Carpenter & Builder Rafter Tools

    Greek geometry in mathematics: Apollonius
    Those problems solvable by means of conic sections are called solid geometry.
    Those problems solvable by means of circles and lines only (as assumed in Euclid's Elements) are called planar geometry.

    Advanced Timber Framing by Steve Chappell ."Exploring the Seven Planes of Compound Joinery"

    Roof Framing Geometry Blog
    sbebuilders.blogspot.com

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