1. Technical Drawing

2. A Picture is Worth 1000 Words:
A graphic language
Pictures are used to construct buildings, machines, highways, products and systems of our world.
Why are pictures so useful?

3. Freehand Sketches

4. Technical Drawings

7. Computer-Aided Design

8. Who Uses the Drawings Architects Contractors Designers Engineers
Technicians
Trades People

9. Types of Pictures: Freehand sketches Technical Drawings Drafted-Design
Computer-Aided Design

10. How does Technical Drawing Differ from Freehand Sketch?
Many simple projects can be made from a freehand sketch.
More complex projects require accurate, detailed plans.
More complex projects often require many different plans-building, electrical, assembly, that are used by many different people.

11. Freehand Drawings First stage of development of a drawing
Quick way to gather ideas
Only on pencil and paper
Getting lines where you want them is important- use dots or construction lines as a guide.

12. Drafting
Refers to all the drawing techniques that are used to describe actual size, shape and structure of an object.

13. Technical Drawing Instruments
T-Square
Triangle
Compass
Drawing Boards
Rulers

14. Isometric Drawing
Object are drawn at 30 degrees and tilted forward 30 degrees so 3 sides are shown.

15. Orthographic Drawing Objects are draw from 4 different view points
Top View
Side View
Front View
Back View