5 f, A B C OF THE STEEL SQUARE 



very simple as illustrated in Fig. 37. If tire first 

 jack was one foot from corner apply the square 

 same as for common rafter, and it gives length 

 and cut (mark the length for starting point on 

 next), and if it is 17 inches from the other move 

 the square up to 17, if the next is 15 move up fo 

 15 and so on. 



37. 



Fig. 38. The side cut of jack to fit hip, if 

 laid down level would, of course, be square miter, 

 but the more the hip rises the sharper the angle. 



Measure across the square from 8 to 12, and it i* 

 nearly 14%, which is the length of rafter to 

 one foot of run. Length and run, cut on length, 

 gives the cut. 



