130 



ABt OF THE STEEL SQUARE 



to it, as shown in Fig. 91, with the length of the 

 end rafter on the blade and the run of the side 

 rafter on the tongue. Space off 2, 4, 6, 8 and 

 10 in. on the tongue after marking along both 

 blade and tongue. The lines, AA, BB, CC, 



Pig. 91. 



T)D, EE, will give the length of the jacks, as 

 well as the side cut to fit the side of the hip, 

 the square being moved down along tongue line, 

 while the run of the end rafter on blade and 

 its rise on tongue will give the seat and plumb 

 cuts. For the side jacks, Fig. 9 gives the 

 same method, only that the length of the side 

 rafter is taken on the blade and the run of the 

 end rafter on the tongue. If it is so desired, 

 the length of the jack rafter A 1 A 1 may be 



