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Mastering Orthographic Projection Layout in First-Angle & Third-Angle

Learn how to correctly layout your drawing views using first-angle or third-angle projection, with a focus on selecting the optimal front view. Avoid common errors and ensure a stable, clear representation of your design.

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Mastering Orthographic Projection Layout in First-Angle & Third-Angle

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  1. ORTHOGRAPHIC PROJECTION HOW TO LAYOUT YOUR DRAWING VIEWS

  2. FIRST-ANGLE PROJECTION The U.S. and Canada uses Third-Angle Projection. The rest of the world uses first-angle projection. All countries start with a FRONT VIEW.

  3. THIRD- ANGLE PROJECTION THIS IS THE LAYOUT USED IN THE UNITED STATES & CANADA.

  4. SELECTING A FRONT VIEW THE CRITICAL PART OF LAYING OUT YOUR DRAWING IS SELECTING YOUR FRONT VIEW. • MINIMAL HIDDEN LINES • STABLE - SO HEAVIEST PART IS ON BOTTOM • USE THE MOST BASIC PROFILE

  5. COMMON ERROR # 1 KA-POW!

  6. COMMON ERROR #2 BOOM!

  7. COMMON ERROR #4 DON'T BE BEHIND THE EIGHT BALL!

  8. COMMON ERROR #5

  9. THE CORRECT CHOICE!!!

  10. LAYOUT EXAMPLE

  11. SUMMARY: THE U.S. AND CANADA USE THIRD-ANGLE PROJECTION FOR DRAWING LAYOUT. THE MOST CRITICAL PART OF THE LAYOUT IS THE SELECTION OF THE FRONT VIEW FRONT VIEW SHOULD SHOW: • THE MOST BASIC PROFILE • THE FEWEST HIDDEN LINES • THE MOST STABLE POSITION

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