58 



A B C OF THE STEEL SQUARE 



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the extreme length of the 

 brace from point to point, 

 and by marking along the 

 blade at one end of this 

 length and along the tongue 

 at the other end we also get 

 the bevels. This is easy and 

 simple enough, and without 

 further refinement will give 

 the lengths and bevels ex- 

 actly for a flat-footed brace- 

 When the run is different 

 than the rise, as in the ex- 

 ample shown at Fig. 31, the 

 square is applied in a some- 

 what different manner. Here 

 we have a run of three feet 

 and a rise of four feet. To 

 get the proper length and 

 bevels for a brace to fit in 

 this situation we must use 

 12 inches on the tongue and 

 16 inches on the blade, then 

 the bevel of the upper end 

 of the brace will be found 

 along the line of the tongue, 

 * v ' and the line of the blade will 

 bevel for the foot of the brace. In this 



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