ALPHABETS OF LINES

It refers to the different style of line used in drafting to show different features.

• Technical Drafting

• Alphabets of Lines

• Lettering

• Mechanical Drafting

A thick line which represent the

outline of the real object

• center line

• horizontal line

• visible line

• section line

It represent the center axis of a

circle, triangle or cubes

• center line

• horizontal line

• visible line

• section line

A thin line that extends from the

object in order to show

dimension limits

• extension line

• long break line

• short break line

• dimension line

A thin line with an arrowhead in

one end to indicate the

measurement of the object

• extension line

• long break line

• short break line

• dimension line

Thin line used to show the

surface that has been cut

• extension line

• long break line

• section line

• dimension line

A medium thick dashes which

represent the hidden part of the

object

• hidden line

• long break line

• section line

• short break line

A medium thick line consisting

of broken and straight lines

drawn alternately. It is also

known as the limiting line, it

limits the length of an elongated

object without changing the size

of its view

• hidden line

• long break line

• section line

• short break line

A thick line drawn in freehand to

show details that a part has

been cut off or broken out

• hidden line

• long break line

• section line

• short break line

It is the other term for dimension

• hidden line

• long break line

• section line

• measurement