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

Sloped Frustum of Pyramid Calculations for Polygons or Cones Roof Framing Geometry
based on Complex Roof Geometry Discussed at JLC-Online.

Major Rafter Pitch	Or Major Pitch Angle	Minor Rafter Pitch	Or Minor Pitch Angle	Polygon Radius	Intercept Point (inches)
				feet inches frac
Polygon Sides	Or Enter Cone O.C. Spacing	Or Enter Cone Rotation Angle	Rotate Polygon	Draw Ellipse	Show Feet Inches

Download Sloped Frustum of Pyramid Geometry DXF
Sloped Frustum of Pyramid Geometry Framing.dxf -- auto generated DXF CAD file of Sloped Frustum of Pyramid of Polygon or Cone geometry drawing each time script is run

Layout a rectangle the size of the ellipse cord length and ellipse arch height.
Snap blue lines from left to right using the Ellipse X Axis dimensions.
Snap red lines from top to bottom of the rectangle using the Ellipse Y Axis dimensions.
Snap black lines for the cutting plane hips where the blue & red lines progressively intersect.
Snap black lines between the end points of the cutting plane hips to form the valley of the ellipse.

Layout a rectangle the size of the ellipse cord length and cone radius length.
Snap blue lines from left to right using the Station On X Axis dimensions.
The last blue line snapped should be the Arch Height Run of the Ellipse.
Snap red lines from top to bottom of the rectangle using the Station On Y Axis dimensions.
Snap black lines for the cutting plane hips where the blue & red lines progressively intersect.
Snap red lines between the end points of the plan view hips to form the spline of the valley curve.

SBE Builders

Holy Grail of Roof Framing Geometry & Trigonometry

Book I & Book II. These roof framing books were written to make complex roof framing simple..

The Art of the Line for Carpentry

The book includes step by step instructions on developing stereotomic drawings on Art du Trait de Charpente, Trestles, Tréteau à devers, Canted Trestles, Louis Mozerolles' Joiners Table, Sawhorses, and the Saint Andrews' Cross, twisted crosses. You'll also find theories on hip rafter shift-offset, standard roof framing kernel trait drawings, German Schiften DP-Shadow Line techniques, folding net roof surface and net plane geometric development, when hip rafters collide, the Warlock Cut, and developing upper and lower claws on rafters using Axioms.

HG IV Circular Work in Carpentry

The book includes step-by-step instructions on developing stereotomic double curvature drawings for circular work in carpentry. Some of the techniques presented in this book are thousands of years in the making. As carpenters, we shouldn't have to re-invent the wheel each time we are faced with new challenges. There is a likely hood that someone, that came before us, has already refined a technique that we can use today. The tools might have changed, but the piece of wood that it is twisting and turning remains the same piece of wood.

Rafter Tools+ for iPhone

Rafter Tools+ is a rafter calculator for complex roof framing angles that other roof framing calculators don't offer.

Stair Tangent for iPhone

This iPhone app is for rough frame carpenters that don't build stairs everyday, but could use an stair app calculator to check their stair building calculations.
Build a set of stairs that you are gonna be proud of.
With Stair Tangent you can elimenate cumulative math errors when building - constructing stairs.

stairtangent.com

Crown Molding Tools
crownmoldingtools.com

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