Roof Rafter Layout Framing Square

Square guides are available at most hardware and home improvement centers. 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. On the framing square blade face using the common rafter length per foot run line in the table look along the blade under the inch number 18 we see 21 63.