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144
SHEET METAL DRAFTING
Fig. 195) is drawn equal in length to line 2–3 of Fig. 193. A perpendicular is erected at the point 2. The length of the slant height (line c–6 of Fig. 194) is set off from this perpendicular. The line
Figs. 193–198.—Register Boxes.
A B is drawn parallel to line 2-3. The point A is located ⅜ in. distance from the perpendicular. A ⅛-inch single edge is added to edges 4–2, 2–3, and 3–B, and a ½-inch flange is added to the top edge of the pattern, mitering the corners at an angle of 45°.
