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IES Río Cabe 2º ESO

TECHNOLOGY


Naturalizaci贸n t茅cnica


6.1. Types of lines Continuous thick line Edge of the object

Continuous thin line Dimensions of the object

Dashed line

Dash-dot line

Hidden edges

Axis of an object


6.2. Dimensions

Acotaci贸n

To dimension is to indicate the long measurements of an object.

The measurement are placed around the drawing, so we can read them easily.


How to draw the dimensions 1. Draw the auxiliary line that indicates the edge that we want to measure.

2. Draw parallels to the edges of the figure. The end of this line will be an arrow.

3. Write dimension: Number shows the real measurement


Elements to dimension Auxiliary dimension line It shows the measurements from one line to the other.

Dimension line A line parallel to the edge we want to measure

Dimension

Number that shows the real measurement of the object

Symbols at the edge of the dimension line Arrows, sloping lines or dots


Elements to dimension

Auxiliary dimension line Dimension

Dimension line

Arrow


Rules to dimension 1

Dimension lines must be parallel to the edge we want to measure

2 Dimension lines must be placed outside the drawing (separate 8 mm )

3

Dimension lines should never be cut


4

5

Dimension lines can not coincide with other lines

Don´t repeat dimensions

6.a Dimensions (numbers) are placed above the dimension line, if it is horizontal

6.b Numbers are placed to the right of the dimension line and rotated 90Âş , if it is vertical

Graphic Expression: Dimensions  
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