Octagon Roof Framing Calculator

Supported octagon roof framing dimensions octagon 4 butt hip rafter dimensions.

Octagon roof framing calculator.

Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. 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. The octagon layout calculator is a handy carpenter s tool for laying out a perfect octagon. The hip rafter pitch is the common rafter pitch over 13 in like 8in 13in for an 8in 12in roof pitch.

Octagon tower ring dxf auto generated dxf cad file of rafter drawing each time script is run. Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results. Very simple to use. Select and re calculate to display.

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.