108 A B C OF THE STEEL SQUARE 



length of a line, from the corner of the pitch 

 board squared from its top edge. This bevel 

 will be understood better by placing the pitch 

 board on the line 2-4 and applying the small 

 triangle to it with its base on the line 4-x, and 

 its point even with the top edge of the pitch 

 board. It will then be at right angles to the 

 top edge of the pitch board. 



In practice, a parallel mold is generally used, 

 and the wreath piece is cut out; both thickness 

 of plank and width of molding being equal to 

 the diameter of a circle that will contain a sec- 

 tion of finished rail. 



Jacques Denioux, Winnipeg, Man., wants to 

 know how to lay out braces, regular and irreg- 

 ular by the use of the Steel Square. 



Answer: Braces and trusses are something 

 like rafters and when the run is known, there 

 should be no difficulty in getting the- lengths and 

 proper bevels. 



In the first place it is always best to make a 

 pattern and then mark out the timber work 

 from the pattern. Suppose we want braces hav- 

 ing a "four-foot run" that is, the brace is to 

 form & diagonal from points four feet from the 

 post and four feet from the girt. Take a piece 

 of stuff already prepared, six feet long, four, 



