92 



A B C OF THE STEEL SQUARE 



follows: The run of the long way of the build- 

 ing is 14, and 9 for the narrow way, which we 

 take on the blade and tongue respectively, as 

 shown on square No. 1, and to this apply square 

 No. 2, as shown. AD equals the run of the hip.' 



Fig. 60. 



AE equals the rise and ED equals the length of 

 the hip. The reader will notice that the letters 

 A, B, C, D form a parallelogram, with side and 

 ends equal to the runs of the common rafters. 



