Octagon Roof Framing Calculator

Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results.

Octagon roof framing calculator.

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. 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. Very simple to use.

The hip rafter pitch is the common rafter pitch over 13 in like 8in 13in for an 8in 12in roof pitch. The octagon layout calculator is a handy carpenter s tool for laying out a perfect octagon. 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. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same.

Select and re calculate to display.