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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

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

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


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


COMMON ERROR # 1

KA-POW!


COMMON ERROR #2

BOOM!


COMMON ERROR #4

DON'T BE BEHIND THE

EIGHT BALL!


COMMON ERROR #5


THE CORRECT CHOICE!!!


LAYOUT EXAMPLE


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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