Fig. 21. Corner of Square Building, Showing
Plan Lines of Plates and Hip
Fig. 22. Corner of Square Building, Showing
Plan Lines of Plates and Valley.
The additional length for the fractional 4 inches run can also be found by taking 4 inches on blade and 3 inches on tongue of square, and stepping one time; this, in addition to the length obtained by stepping 10 times along the rafter timber with 12 on blade and 9 on tongue, will give the full length of the rafter for a run of 10 feet 4 inches.
Fig. 23. Use of Square to Determine Heel Cut of Valley.