. Cyclopedia of architecture, carpentry, and building; a general reference work .. . e drawn along the Hne of the first column, as shown for the triangle inFig. 8, and for thehexagon in Fig. Fig. 10 isshown a diagramfor finding degreeson the square. Forexample, if a pitchof 35 degrees is re-quired, use 8^Y oiltongue and 12 onblade; if 45degrees,use 12 on tongueand 12 on blade; Fig. 11 is shown the relative length of run for a rafter and ahip, the rafter being 12 inches and the hip 17 inches. The reason, asshown in this diagram, why 17 istaken for the run of the hip, in-stead of 12 a
. Cyclopedia of architecture, carpentry, and building; a general reference work .. . e drawn along the Hne of the first column, as shown for the triangle inFig. 8, and for thehexagon in Fig. Fig. 10 isshown a diagramfor finding degreeson the square. Forexample, if a pitchof 35 degrees is re-quired, use 8^Y oiltongue and 12 onblade; if 45degrees,use 12 on tongueand 12 on blade; Fig. 11 is shown the relative length of run for a rafter and ahip, the rafter being 12 inches and the hip 17 inches. The reason, asshown in this diagram, why 17 istaken for the run of the hip, in-stead of 12 as for the commonrafter, is that the seats of the com-mon rafter and hip do not runparallel with each other, but di-verge in roofs of equal pitch at anangle of 45 degrees; therefore, 17inches taken on the run of the hipis equal to only 12 inches whentaken on that of the commonrafter, as shown by the dottedline from heel to heel of the twosquares in Fig. 11. In Fig. 12 is shown howother figures on the square may befound for corners that deviate from the 45 degrees. It is shown that. Fig. 9. Use of Square to Find Miter ofHexagon. 346 THE STEEL SQUARE 7 for a pentagon, which makes a 36-degree angle with the plate, thefigure to be used =-,on the square for Trun is 14| inches;for a hexagon,which makes a30-degree anglewith the plate,the figure will be13| inches; andfor an octagon,which makes anangle of 22^ de-grees with theplate, the figureto use on thesquare for runof hip to corre-spond to tne run pig_ jg. Diagram for Finding Pitches of Various Degrees2 ,1 by Means of the Steel Square. or the common rafters, will be 13 inches. It will be observed that the height in each case is 9 inches. Fig. 13 illustrates amethod of finding therelative height of a hipor valley per foot run tothat of the common raf-ter. The square is shownplaced with 12 on bladeand 9 on tongue for thecommon rafter; andshows that for the hip therise is only 6y\ inches. The Steel Square asApplied in Roof Fram= Fig. 11
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Keywords: ., bo, bookcentury1900, booksubjectarchitecture, booksubjectbuilding
