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.

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

Select and re calculate to display. Use it to calculate your gazebo layout. The hip rafter pitch is the common rafter pitch over 13 in like 8in 13in for an 8in 12in roof pitch. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same.

Very simple to use.