132 



A B C OF THE STEEL SQUARE 



The rules and diagrams, given herewith will 

 apply to valley as well as hip rafters, and may 

 he relied upon as being accurate if closely 

 followed. 



RULE See Fig. 87. 

 Tongue. Blade. 



12" 16" gives run of hip. 



10" 12" gives length of side rafter. 



10" 16" gives length of end rafter. 



10" 20" gives length of hip rafter. 



RULE See Fig. 91. 

 Blade. Tongue. 



Common End Rafter 19" 12' 



Longest Jack " 15 10/12" 10' 



fth " 12 8/12" 8' 



3d " " 9 6/12" 6' 



2d " " 6 4/12" 4' 



Shortest " 3 2/12" 2' 



Blade gives Side Cut of Jacks. 



