A B C OF THE STEEL SQUARE 



101 



hip on tongue, length of hip on blade, and 

 tongue gives bevel. These figures will cover all 

 bevels for cutting, cornice and sheathing. For 

 bed moulds for gable to fit under cornice, take 

 half width of building on tongue, length of 

 common rafter on blade ; blade gives cut. To 

 cut planceer to run up valley, take height of 

 rafter on tongue, length of rafter on blade; 

 tongue gives bevel. For plumb cut, take height 

 of hip on tongue, length of hip on blade ; 

 tongue gives bevel. 



These figures were specially prepared for a 

 hip roof having a one-third pitch, but will suit 

 other pitches equally well if the difference in 

 height of ridge is considered. 



For a hopper the mitre is cut on the same 

 principle. To make a butt joint, take the width 

 of side on blade, and half the flare on tongue ; 

 the latter gives the cut. You will observe that 

 a, hip-roof is the same as a hopper inverted. The 

 cuts for the edges of the pieces of a hexagonal 

 hopper are found this way. Subtract the width 

 of one piece at the bottom from the width of 

 same at top, take remainder on tongue, depth 

 of side on blade ; tongue gives the cut. The cut 

 on face of sides: Take 7-12 of the rise on 

 tongue and the depth of side on blade ; tongue 

 gives cut. The bevel of top and bottom : Take 

 rise on blade, run on tongue ; tongue gives cut. 



