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ORTHOGRAPHIC PROJECTION PowerPoint PPT Presentation


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ORTHOGRAPHIC PROJECTION. HOW TO LAYOUT YOUR DRAWING VIEWS. 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. THIRD- ANGLE PROJECTION.

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ORTHOGRAPHIC PROJECTION

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Orthographic projection l.jpg

ORTHOGRAPHIC PROJECTION

HOW TO LAYOUT YOUR DRAWING

VIEWS


First angle projection l.jpg

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.


Third angle projection l.jpg

THIRD- ANGLE PROJECTION

THIS IS THE LAYOUT USED IN THE UNITED STATES & CANADA.


Selecting a front view l.jpg

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


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COMMON ERROR # 1

KA-POW!


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COMMON ERROR #2

BOOM!


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COMMON ERROR #4

DON'T BE BEHIND THE

EIGHT BALL!


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COMMON ERROR #5


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THE CORRECT CHOICE!!!


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LAYOUT EXAMPLE


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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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