68 



ABC OF THE STEEL SQUARE 



Fig. 42 is another practical way, which is. 

 simply to lay the square on heel or hip. The 

 illustration explains itself. 



Fig. 42. 



Perhaps the most practical way of all to frame 

 a roof, the simplest to understand, easiest to 

 remember, and most rapid to apply is simply to 

 always take the rise and run, measure across the 

 square which gives length. Rise and run give 

 cuts, so you have it all. 



Fig. 43. 



Fig. 43 illustrates a roof 25 feet wide and a 

 rise 10 feet, 9 inches, run 12 feet, 6 inches. 

 Measuring across the square from 1C ^4 to 121/2 

 gives 16V>, or 16 feet, 6 inches is the length of 

 7;after. 



