Understanding Dimensions 63
- No periods are used after the unit symbols.
- Scale on drawings is to be shown by a ratio (1:1, 1:10, 1:50, etc.).
The preferred method of metric dimensioning is called a soft conversion, in which common metric
modules are used. Thus, 2-x-4 lumber is 40 x 90 mm using soft conversion. This method is far more con-
venient when drawing plans and measuring in construction. When measuring plywood thickness in met-
Figure 4.5B A drawing showing scales in metric (1:50).