Roof Rafter Layout Framing Square

Framing square guides are small inexpensive metal attachments to the framing square that are locked in position on the square s edges at the pitch and run dimensions to define the roof angle and make the repeated marking of the rafters much more efficient.

Roof rafter layout framing square.

The standard two foot framing square also referred to as a carpenter s square and historically as a steel square is an l shaped tool that is used to mark angles for cuts used in building framing particularly roof rafters stair stringers and many other cuts or angles other than 90. 18 12 roof slope rafter lengths let s figure the rafter length for an 18 in 12 roof. I marked it in red to make it easier to spot.