1. Basic Lines and Views

2. Basic Lines

3. Object Line
A heavy, dark line which identifies the visible edge or surface of an object.

4. Hidden Line
Broken line, medium thickness. Used to show edges not visible.

5. Center Line
Fine, broken line made of alternating short and long dashes. Used to show the center of an object.

6. Dimension Line / Extension Line
Dimension Lines - used to show the extent of a dimension.
Extension Lines - Used to extend a point from an object.

7. Leader
Fine line used to define a point or area.
Grind Surface

8. Cutting Plane Line
Used to indicate where an imaginary cut is made through the object.

9. Section Lines
Steel
Cast Iron
Copper, Bronze, Brass
Lead, Zinc, Alloys

10. Break Lines
Short Break Line
Long Break Line

11. Used to show a part has been reduced in length on the drawing to conserve space.3”
250 feet

12. Basic Views
Pictorial
Orthographic

13. Pictorial
Oblique
Isometric

14. Orthographic
Back View
Front View
Top View
Side Views
Bottom View

15. BACK TO DRAFTING LESSONS