1. Orthographic Projection & Line Types
Mr. Fisher

2. Essential Question
-What are the drawing techniques that are needed for orthographic projection?
-What are the views needed for this drawing style?

3. Orthographic Projection
A drawing that contains 3 views of the object
Contains projection lines
Shows the 3 principles of dimension
Width
Height
Depth

4. Top View Top View Most important view
Shows the width and depth
Most important view
Avoid showing hidden lines in this view
It is located directly above the front view

5. Front View
Shows the length and height

6. Right Side Shows the Depth and Height of object
Positioned to the right of the front view

7. Position of Views
All of the views must be in line to create the projection lines.

8. Line Types
Hidden
Center
Coinciding
Construction

9. Hidden Lines
Shows the hidden aspects of the object

10. Center Lines
Used to show where the circle is located on the image

11. Coinciding Lines Visible and hidden lines Hidden and center lines
the visible line is shown
Hidden and center lines
the hidden line is shown