Carpenter . same 1, 2, 3, 4, as indicated, produce throughB-F and D-G, cutting the circumference atF and G. Divide B-F and B-G into thesame number of parts as A-B, which, beingjoined, will give intersecting points throughwhich the circular arc D-4 may be similar operation must be gone throughfor the curve over C-A, or the pattern maybe reversed for the left-hand side. Shouldthe curve be a large, long sweep, it is ad-visable to use plenty of points and bend astrip around them. Making the Side-Cut on Jack Rafter. (By Wm. Innes, L. U. 461.)Editor The Carpenter: The rule suggested by Brot
Carpenter . same 1, 2, 3, 4, as indicated, produce throughB-F and D-G, cutting the circumference atF and G. Divide B-F and B-G into thesame number of parts as A-B, which, beingjoined, will give intersecting points throughwhich the circular arc D-4 may be similar operation must be gone throughfor the curve over C-A, or the pattern maybe reversed for the left-hand side. Shouldthe curve be a large, long sweep, it is ad-visable to use plenty of points and bend astrip around them. Making the Side-Cut on Jack Rafter. (By Wm. Innes, L. U. 461.)Editor The Carpenter: The rule suggested by Brother Edmundsin the December, 1910, Journal, is a first-class rule. This is a first-class rule as far as it goes,but it is not a general truth, as he instance, he states that by applying theangle of 45 degrees on the seat of a rafterand marking the two sides, we can then getthe top edge mark. We cannot get the side-cut that way when-ever the seat deviates from the angle of 45. degrees, which may happen on many kindsof roofs, a triangular and trapezium roofbeing the furthest from the 45-degTee ap-plication. The following is not difficult and alwaystrue: Here A-C is length of rafter, and levelwall is A-B, and C-D is length of hip orvalley, and the true bevel is seen at C atFig. 1. To find it by steel square, hold the squareon plan, as shown at C, noting the figuresOn blade and tongue, then transfer it tojack or cripple, as shown at A-C in Fig. broken line shows jack or cripple. 45 THE CARPENTER
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Keywords: ., bookauthorunitedbr, bookcentury1900, bookdecade1910, bookyear1911
