By Steve
The scales recommended for use with the metric system are:
Actual Size:
- 1:1
Reduction:
- 1:2
- 1:2.5
- 1:5
- 1:10
Enlargement:
- 2:1
- 5:1
- 10:1
Decimal multiples of these base scales are also used. eg. 1:100, 1:250, 20:1
Indication of Scale
The scale should normally be noted in the title block of a drawing. When more than one scale is used they should be shown close to the views to which they refer, and the title block should read ‘scales as shown’.
If a drawing uses predominantly one scale it should be noted in the title block together with the wording ‘or as shown’.