Octagon Roof Framing Calculator

Fraction precision set 1 8 1 16 1 32 1 64 decimal inch metric all inch inputs and dimensions are actual physical finished sizes unless otherwise noted.

Octagon roof framing calculator.

Very simple to use. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same. This calculator will also calculate the king post radius the king post rise the king post minimum height and the octagon hip rafter to king post length. The hip rafter pitch is the common rafter pitch over 13 in like 8in 13in for an 8in 12in roof pitch.

Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results. Octagon tower ring dxf auto generated dxf cad file of rafter drawing each time script is run. This octagon tower rafter script calculator will return the octagon rafter geometry angles and trigonometry rafter measurements for octagon tower roof framing with a structural ring support. The octagon layout calculator is a handy carpenter s tool for laying out a perfect octagon.

Select and re calculate to display.