Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 436
run, which, as was shown in previous figures,will always be 17 inches in roofs of equal pitch, where the plan linesstand at 45 degrees to the plates and square to each other. The 19J taken on the blade represents the actual length of a hipor valley that will span over a run of 17 inches. The bevel… … Bevel to fit back,of jacks againsthip or valley Steel Square Applied to Jack Rafter to Find Bevel forFitting against Side of Hip or Valley. 359 IS THE STEEL SQUARE *> ^ S* i/Ti 2 Run of RafterFig. 26. Finding Length to ShortenRafters for Jacks per Footof Run. In Fig. 25 is shown the steel square…
Architecture · Building
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