. Cyclopedia of architecture, carpentry, and building; a general reference work .. . with the will cut the blade in7 as shown; and from 7to m, the heel of thesquare, will be the lengthof the side. From 6 ontongue, erect a line tocut the degree line in c; and with c as center, describe a circle havingthe radius of c 7; and around the circle, complete the hexagon bytaking the length 7 m with the compass for each side, as shown. In Fig. 7 the same process is shown applied to the octagon. Thedegree line in all the polygons is found by dividing 360 by the numberof sides in the figure: 360
. Cyclopedia of architecture, carpentry, and building; a general reference work .. . with the will cut the blade in7 as shown; and from 7to m, the heel of thesquare, will be the lengthof the side. From 6 ontongue, erect a line tocut the degree line in c; and with c as center, describe a circle havingthe radius of c 7; and around the circle, complete the hexagon bytaking the length 7 m with the compass for each side, as shown. In Fig. 7 the same process is shown applied to the octagon. Thedegree line in all the polygons is found by dividing 360 by the numberof sides in the figure: 360 H- 8 = 45; and 45 -^ 2 = 22^ gives the degree line for the octagon. Complete the process aswas described for the other polygons. By using the following figures for the various polygons, the miterlines may be found; but in these figures no account is taken of therelative size of sides to the foot as in the figures preceding:Triangle 7 in. and 4 11 8 Hexagon 4 « « 7Heptagon 12| 6 Use of Steel Square to Find Miter and Sideof Octagon. 345 THE STEEL SQUARE. Fig. 8. Use of Square to Find Miter of EcLuilateral Triangle. Octagon 17 in. and 7 22^ 9Decagon 9^ 3The miter is to be 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 co
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Keywords: ., bo, bookcentury1900, booksubjectarchitecture, booksubjectbuilding
