Methods of Dimensions with Example Drawing

To show dimensions of all parts of drawing is mandatory for engineer. All lines in drawing would have length, width or radius to indicate. The use of proper dimensioning method will tends to full marks for correct drawing. Now let us discuss methods of dimensioning in brief.

There are two Methods of Dimensions. (1) Uni-directional System  (2) Aligned System.

(1) Uni-directional System 

Procedure: UNIDIRECTIONAL METHOD OF DIMENSIONING

Step-1 Draw an example drawing as given into the above figure.  Drawing should be drawn as per the given dimensions.

Step-2 In Unidirectional Method of  Dimensioning the dimension line should be cut at center and dimensions should be placed in the middle of dimension lines as shown into the figure.

Step-3 At the ends of dimension lines filled arrow heads should be placed.

(2) Aligned System

Procedure: ALIGNED METHOD OF DIMENSIONING

Step-1 Draw an example drawing as given into the above figure.  Drawing should be drawn as per the given dimensions.

Step-2 In Aligned Method of Dimensioning the dimension line should be continuous and dimensions should be placed in the middle of dimension lines as shown into the figure.

Step-3 At the ends of dimension lines filled arrow heads should be placed.