The types of lines used in technical drawing are perhaps the most important thing in technical drawing practice, especially because they illustrate how shapes and sizes of objects or objects would appear in real life after they have been constructed.
The types of lines used on technical drawings help viewers communicate, understand, and easily pass over important information. A free PDF copy on the following types of lines in technical drawing and their respective uses can be downloaded at the end of this page:
1. Break line
2. Center line (or, long/short-dashed thin line)
3. Chain line
4. Construction line
5. Continuous thick line
6. Continuous thin line
7. Cutting plane line (viewing plane or section line)
8. Dimension line
9. Extension line
10. Freehand break line (or continuous narrow irregular line)
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11. Hatching line (or section line)
12. Hidden line
13. Leader line
14. Long break line (or continuous thin straight line with zigzags)
15. Match line
16. Miter line (inclined projection line)
17. Phantom line
18. Stitch line
19. Symmetry line
20. Visible line
Download PDF: Types of Lines in Technical Drawing and Their Uses
MoTEnv — MTE 