Parallel Line Pattern Development

17 Off Centre 90 Degree Tee

  1. Draw a full front elevation view and end elevation view.
  2. Draw profiles on the tee in both views and divide into 6 equal parts (see Divide a Circle Into 12 Equal Parts). Include all labeling. Remember that the labeling will flip with the view.
  3. Draw in the element lines from the profile divisions.
  4. Where the element lines hit the pipe in the end view, project them horizontally into the front view.
  5. Following the labeling, draw in the miter line in the front view.
  6. Draw the tee stretch-out and divide into 12 equal parts (see Divide a Line Using a Ruler on an Angle). Label the stretch-out to match the elevation view.
  7. Transfer/project the corresponding points from the front elevation view to the stretch-out.
  8. Circle the points and use a flexible curve to complete 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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