How To Use Framing Square For Roof Pitch

Roof framing rafter layout from one end of the rafter material using a speed square or framing square mark an x in 12 angle on the rafter and cut it.

How to use framing square for roof pitch. On both the long and short arms of the framing square are marked various framing tables giving rafter lengths roof slopes and the proper angle of cuts for various roofing connections such as a rafter end abutting the ridge board the birds mouth cut at the rafter segment that rests atop a wall plate hip and valley rafter cuts and other information. The skinny length is called the tongue. Determine the slope or pitch of the roof by referring to your building plans. 204 x number on framing square 228.

13 412 is the unit rise in inches per foot of our example roof run. This will the first point of the rafter measurement line. I go over a. The thicker longer section is called the blade.

You are looking at the face of the framing square. Number on framing square 228 204 x 12in. Place the pivot point against the shingles. The pitch is defined as the vertical distance a roof.

The length of the plumb cut is determined by the width of the fascia board. Layout the plumb cut and level cut for the rafter tail. How to build roof rafters using a framing square. Lay a framing square flat on the board to be used as a rafter near one end.

More project and tips. The trick here is understanding the number on the framing square is the unit rise per foot of run. The horizontal blade should align with the bottom edge of the board at 12 inches and the vertical tongue should align at the roof pitch. Then place a torpedo level on the fat base of the rafter square and adjust the square until the level is level.

Place the framing square on a table with the skinny length pointing right. Place a 2 by 6 board on sawhorses to lay out the first full length or common rafter. Measure down y height from the long point of the rafter cut and make a mark. 228 204 x 12 13 412.