IS ABC OF THE STEEL SQUARE' 



as there are many occasions when the "only 

 method" he possesses cannot be applied. Heno 

 I submit the foregoing, at your request. 



W. H." 



All this is very true, and right as far as H 

 goes, but it so happens that man}^ workmen de 

 not have the necessary learning to work out thess 

 problems in footing on the lines laid down by W. 

 H., but, in order to meet conditions of this kind 

 I have prepared a series of tables which is in- 

 serted in the larger volumes, giving the length of 

 rafters for any building having a width of from 

 five to sixty feet and a rise of roof of from 

 one to eighteen feet to ridge. This will cover 

 the whole ground, and form a ready table for 

 the estimator to take his quantities from. 



I may" be pardoned for again showing the 

 common and' simplest method of laying out an 

 ordinary rafter, for notwithstanding all I have 

 said and described and explained on this subject, 

 there will always be some persons who will not 

 be able to grasp the method, unless it is put to 

 them in some other light. I am sure of this 

 from the long experience I have had in the 

 answering of questions of this kind through the 

 columns of different building journals. This is 

 tto doubt owing to some constitutional peculiar- 

 ities of both the person who makes the inquiry 



