Octagon Roof Framing Calculator
Use it to calculate your gazebo layout.
Octagon roof framing calculator. Select and re calculate to display. Very simple to use. 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. 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. Supported octagon roof framing dimensions octagon 4 butt hip rafter dimensions. 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.
Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results.