ORTHOGRAPHIC PROJECTION

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ORTHOGRAPHIC PROJECTION
HOW TO LAYOUT YOUR DRAWING VIEWS
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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.
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THIRD- ANGLE PROJECTION
THIS IS THE LAYOUT USED IN THE UNITED STATES
CANADA.
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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