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132
SHEET METAL DRAFTING
point 1 of the plan, the extension line is traced to the miter line, and thence to a correspondingly numbered line in the stretchout. In like manner, all points of intersection can be located in the stretchout. A curved line passing through these points will give the miter cut. The pattern is completed by an extension line drawn from the
Figs. 182–185.Roof Flange to Fit Over Ridge and Hips of Roof.
top of the pipe. A lock is added to each side of the pattern. A flange (not shown) should be added to the miter cut.
The Apron.—The exact spacing of points 10, 11, 12, 1, 2, and 2½, as shown on the center line of Fig. 183 by lines a, b, c, d, and e, are set off upon any straight line, Fig. 185. These points also
