Parallel Line Pattern Development

18 Oblique Tee

Note: This is the only tee which requires a full front elevation view.
  1. Draw a full front 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.
  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 to the right and divide it into 12 equal parts (see Divide a Line Using a Ruler on an Angle). Label to match the elevation views.
  7. Using your compass, transfer the corresponding points from the front elevation view to the stretch-out.  Note: The element lines cannot be projected in this case because the stretch-out is not perpendicular to the tee. In the case of a 90° tee, it is at a right angle to the stretch-out. To be able to project an oblique tee, the stretch-out must be draw at an angle equal to the tee angle. This usually takes too much room to justify doing so.
  8. Use a flexible curve to join the points and 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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