Section Lines

In a section view, the object is shown as if it were cut along the cutting plane line.  To illustrate where solid material be exposed by such a cut, section lining is used.  The most general form of section lining consists of parallel thin lines drawn at an angle.

Section lines are thin.  Do not confuse section lines with cutting plane lines.

Section lines illustrate where material would be exposed if the object were cut along the cutting plane line.