Title: (Optional) Develop patterns, including radial, parallel line, and triangulation patterns.
Course: Drafting: Mechanical (21102-II) > Section: Performing Mechanical Drafting and Design Operations with Extensive Use of CADD

Development should include

- radial patterns
  - an understanding of the properties of cones and pyramids

- parallel line pattern development (often used to indicate fold or bend lines in flat drawings of sheet metal products [e.g., heating, ventilation, and air conditioning (HVAC) ducts, filing cabinets])
  - an understanding of prisms and cylinders

- triangulation of irregular surfaces.

Process/Skill Questions:

- What industries might use pattern development drawings?
- How are parallel and radial developments different?
- How is a radial pattern developed from a cone?
- When might triangulation be required to develop a surface?