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3.4.2 Dimensioning in Orthographic Drawing

A dimensioning drawing should provide all the information necessary. Dimensions

are always drawn using continuous thin lines. Projection lines do not touch the

object and are drawn perpendicular to the dimensioned element. All dimensions

less than 1 should have zero. i.e. ‘.57’ should be written as ‘0.57’.

Figure 3.10 : Dimension writing technique

3.4.2.1 Type of dimension

There are several types of dimensions that can be used in drawing. The

selection of the type of dimension used in the drawing is subjective in

order to produce a complete and proper drawing. Table 3.1 shows types
of dimensions that can be used in technical drawing :

Table 3.1 : Types of dimensioning

Parallel