Parallel Line Pattern Development

14 Pipe on a Miter

  1. Draw a full plan (top) and elevation view (front) of the project, complete with the miter line.
  2. Divide the plan view into 12 equal parts (see Divide a Circle Into 12 Equal Parts) and label it. It is common practice to label a round object with numbers.
  3. Project the plan view divisions down into the elevation view.
  4. Draw the stretch-out directly to the right of the elevation view and divide it into 12 equal parts (see Divide a Line Using a Ruler on an Angle). Label it to match the plan view and make sure to start the labeling where you want the seam. Add any required seam allowances outside of the stretch-out.
  5. At the points where the element lines cross the miter line, project them into the stretch-out.
  6. Following the labeling, circle the intersection points on the stretch-out. Don’t put a dot over the points, but circle around them.
  7. Using a flexible curve, join the points to draw in the miter line, completing the pattern.



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Pattern Development: Sheet Metal Level 1 Copyright © 2021 by Brian Coey is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

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