Pre-Engineering Introduction to CADD Scales.

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Presentation transcript:

Pre-Engineering Introduction to CADD Scales

OBJECTIVE Reading and using a scale

Types of Scales Classified as open-divided scales and full-divided scales. Architect’s scale Civil Engineer’s scale Mechanical engineer’s scale Combination scale Metric scale

Architect’s Scale Used for architectural and structural drafting. Divided into feet and inches. Triangular instruments include 11 different scales.

Architect’s Scales

Civil Engineer’s Scale Also called decimal scale. Used in Civil engineering and manufacturing. Divided into units representing decimal parts of inch. Divisions may represent ay measuring unit.

Mechanical Engineer’s Scale Used for drawing machine parts. Used for measuring in inches or fractional inches. Also called “size” scales.

Metric Scales Referred to as “size” scales. Commonly referenced on drawings as ratios. Scale divisions based on number 10.

Drawing to Scale

Reading the Architect’s Scale

Reading the Mechanical Engineer’s Scale

Reading the Civil Engineer’s Scale

Reading the Metric Scale