Basic Lines and Views

Basic Lines

Object Line A heavy, dark line which identifies the visible edge or surface of an object.

Hidden Line Broken line, medium thickness. Used to show edges not visible.

Center Line Fine, broken line made of alternating short and long dashes. Used to show the center of an object.

Dimension Line / Extension Line Dimension Lines - used to show the extent of a dimension. Extension Lines - Used to extend a point from an object.

Leader Fine line used to define a point or area. Grind Surface

Cutting Plane Line Used to indicate where an imaginary cut is made through the object.

Section Lines Steel Cast Iron Copper, Bronze, Brass Lead, Zinc, Alloys

Break Lines Short Break Line Long Break Line

Used to show a part has been reduced in length on the drawing to conserve space. 3” 250 feet

Basic Views Pictorial Orthographic

Pictorial Oblique Isometric

Orthographic Back View Front View Top View Side Views Bottom View

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