1. Orthographic Projection

2. Review Isometric Drawings
to appear three dimensional, a 30 degree angle is applied to its sides
Dimensions still stay the same

3. Review contingued Oblique Drawings (for a cube)
Draw the front (is parallel to you) or side view of the object.
All measurements drawn backwards are half the original measurement.
45 degrees is the angle for all lines drawn backwards

4. Orthographic Projections
Ortho – Greek word meaning perpendicular
Show the views of an object projected in 2-D
Usual views are the top, front and right side of the object

5. Imagine the following If object were surrounded by a glass cube
We could see on each of the cube’s faces a projection of the object within view

6. Orthographic projections
Unfold the cube so all the views lye in one plane
The three views are now on a single sheet

7. The three views Front view Top view Right view Height and width
Width and depth
Right view
Depth and height

8. Make sure your views are aligned (and to scale)

9. Make sure to include details

13. Do your orthographic drawings with a Title Block Border
Instructions:
All drawings must be on a clean blank, not 3-hole punched sheet of 215mm x 279mm paper (8-1/2” x 11”). The template must have a border and a title block. When you draw a part you must also include the title, scale, date and your full name in block letters within the title block. Refer to included diagram.
To Create The Border:
Draw a rectangle 10mm inside all four sides of the sheet.

14. Instructions continued
To Create The Title Block:
Draw a horizontal line between the left and right borders 7mm above the bottom border.
Draw a horizontal line between the left and right borders 3mm above the first line.
Draw a horizontal line between the left and right borders 5mm above the second line.
Draw a vertical line between the bottom border and the third line 75mm from the left border.
Draw a vertical line between the bottom border and the third line 125mm from the left border
Draw a vertical line between the bottom border and the third line 100mm from the right border.
Write the title, scale, date and your full name 5mm from the left vertical lines within the title block.

15. Example

16. Should be similar to

17. Draw an orthographic drawing for the following using the following dimension
1.5 cm
1.5 cm
1.5 cm
4.5 cm
6 cm
4.5 cm

18. Drawing #2 This one has a scale in mm