Line types GC

A thick, dark continuous line shows visible edges

• Outline

• Construction

• Hidden detail

• Cutting plane

A thin, lightly drawn continuous line is used for projection

• Construction lines

• Hidden detail

• Fold line

• Outlines

A thin broken line

• Outline

• Hidden lines

• Centre line

• Hatching

A thin chain line (long dash, dot, long dash)

• Outline

• Centre line

• Hatching

• Fold line

A thin double dash chain line

• Cutting plane

• Outline

• Centre line

• Fold line

A thin chain line with thick edges

• Cutting plane

• Outline

• Construction line

• Hidden edge

Thin 45 degree cross lines show the cut surface

• Hatching

• Cutting plane

• Fold line

• Construction lines