Scaling & Dimensioning

Simply means that everything in a drawing/model is the same size, proportion and connection as the real object

• Imperial Scale

• Uses ratios of inches to feet

Uses the same units in both ratio terms

• State the scale of the enlargement/reduction as a ratio in the form 1:n

• Multiply n by the length given from the scale drawing

• Write the units

1:1250 (often requested by planners)

1:1000

1:500

1:200

1:100

1:200

1:100

1:20

1:10

1:5

Placing of information on a drawing

Dimension are written in two directions throughout the drawing

Dimensions are placed above and on the right side of a drawing

All figures are oriented to read from the bottom of the drawing

• Dimension Line

• Extension Line

• Center Line

• Leader Line

• Arrowheads

• Numerical Value

• Notes