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March 5, 2008

• Trade ¼” / 1/8”-scale worksheet with a partner. Check each other’s measurements –

– Put a check next to the # if correct– Put an “X” next to the # if incorrect

• Fix any incorrect answers.

• You have ~8 minutes

DESIGN DRAWINGS

• An engineer designs an object.

• How many drawings are needed to communicate the design to the manufacturer (people who make it)?

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3-VIEW DRAWINGS

• Orthographic Projections– What other words use the prefix ORTHO?

• Orthodontist, Orthopedic, Orthogonal, Orthodox– Orthographic refers to looking straight at an

object• Top View• Front View• Right Side View• Bottom View• Back View• Left Side View

Top ViewFront ViewRight Side View

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3-VIEW DRAWINGS

TOP VIEW

FRONT VIEW RT SIDE VIEW

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• Why use orthographic projections?– They are sufficient for correctly manufacturing

an object as the designers intended.

3-VIEW DRAWINGS

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3-VIEW DRAWINGS

TOP VIEW

FRONT VIEW RT SIDE VIEW

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3-VIEW DRAWINGS

1

7

3 2

45

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Orthographic Projections

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3-View Worksheet #1

Orthographic Projections

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Orthographic Projections

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Orthographic Projections

Orthographic Projections

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Homework• Complete the front and back of both

orthographic projection worksheets• Have steps 2 and 3 COMPLETE in your

group notebook for Monday’s class• Your design drawings in Step 2 should

have dimensions: how big is each object?

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Sources

• ITEA “Colonizing the Moon Challenge” Draft Document curriculum

• Wright, R. Thomas. Technology. Muncie: G-W, 2008.

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