IRWIN Rafter Square Reference Guide

← Back to document page

cut: Using the tail length (our example: 1' 113⁄ 8"), measure down the rafter from the seat plumb mark and make the bottom plumb mark the same as in Step 1. If the mark is too close to the end of the lumber, turn the square over to the bottom edge of the rafter, and still using the number 7, make the bottom plumb mark. You may wish to

  Using