1. ES 101 Engineering Graphics
Gaurav Srivastava
Assistant Professor
Civil Engineering
Fall 2017

2. Center Line Center line should be thinner than object/hidden line.
Leave space when meeting object/hidden line
Phantom line
Continuous center line

3. Hidden lines should join other hidden lines.
Hidden line should join object line, except when it appears like an extension of the object line.
Hidden lines should join other hidden lines.

4. Hidden Lines Parallel hidden lines should be staggered.
Hidden lines should join other hidden lines.

5. Curved Hidden lines should join Center line.
Hidden line should join object line, except when it appears like an extension of the object line.
Curved Hidden lines should join Center line.

6. Precedence of Lines
Object Line
Hidden Line
Center Line

7. Example 1
Top View
Front View
Side View

8. Example 2
Top View
Front View
Side View

9. Example 3

10. Example 3

11. Example 4

12. Example 4

13. Example 5

14. Example 5