Octagon Roof Framing Calculator

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

Octagon roof framing calculator.

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. Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same.

The hip rafter pitch is the common rafter pitch over 13 in like 8in 13in for an 8in 12in roof pitch. 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. Use it to calculate your gazebo layout. Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results.

Very simple to use.