When you begin to learn drafting, you have to learn about the different types of lines. Line types are extremely important because they are used to communicate different ideas about an object. In the video below we review the three basic types of lines that are necessary to understand when you are beginning to learn about drafting.

Three types of lines

Visible or Object Lines

Dark thick lines that show the outside edges of an object.

Construction Lines

Light lines that are drawn to help place other lines on a drawing. They eventually get erased.

Hidden Lines

Dashed lines that show parts of an object that cannot be seen from the current viewing angle. Hidden lines exist to show engineers and manufactures that there are features on an object that exist but can’t be shown through another means at the current angle.