Richey's guide and assistant for carpenters and mechanics : a work of practical information, giving almost every geometrical and practical problem likely to arise in the work of the carpenter, and quick and easy methods for their solution : the use of the steel square, etc., tables showing strength and weight of materials, methods of framing, useful recipes, etc., etc. (1894)
Richey, H. G. (Harry Grant), b. 1868 · New York : W.T. Comstock · leaf 25
the rafter, with a rise of 4 feet 2^ inches. In a quarter pitchroof the rise of the rafter to each foot is 6 inches, so wetake 12 on the blade of the square and 6 on the tongue andplace it on tlie rafter as shown in Fig. 12, taking the length i8 GUIDE AND ASSISTANT as many times as feet in the run,… … fig 13 as shown, thus giving the length and top cut of the rafter.For hips and valleys for square roofs use 17 on the bladeinstead of 12. Hip rafters may be laid out in the same manner byusing 17 instead of 12 for the run. This rule applies onlyto retangular roofs. 12—To Get the Lengths and Cuts of…
Carpentry
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