. Cyclopedia of architecture, carpentry, and building : a general reference work .... Fig. 136. Fig. 137. view from 1 to 4. From these intersections parallel to II lines indefinitely intersecting 1 L from 1 to 4. At rightangles to N L produced draw the line at c d^ on which a truesection must be obtained at right angles to the line of the gussetsheet. Measuring from the line A D in end view, take the vari-ous distances to points 2, 3, and 4 and place them on correspond-ing lines measuring from the line c d on either side, thus obtaining 19b SHEET METAL WORK 127 the intersections 1^ to 4

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. Cyclopedia of architecture, carpentry, and building : a general reference work .... Fig. 136. Fig. 137. view from 1 to 4. From these intersections parallel to II lines indefinitely intersecting 1 L from 1 to 4. At rightangles to N L produced draw the line at c d^ on which a truesection must be obtained at right angles to the line of the gussetsheet. Measuring from the line A D in end view, take the vari-ous distances to points 2, 3, and 4 and place them on correspond-ing lines measuring from the line c d on either side, thus obtaining 19b SHEET METAL WORK 127 the intersections 1^ to 4°, a line traced through these points willbe the true section. In (Y) on any line as O P lay off the stretch-oat of the true section as shown from 4, 1, 4^^. • As the gussetsheet only covers a portion equal to a half circle, add the distance4° e equal to -| of 7 times the thickness of the metal in use and

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