Introduction to Sectional Views
[COM, CA, CF]
An orthographic projection of a product will show the exterior surfaces. Interior details are hidden and are represented with the hidden-line symbol. If the hidden features are complex, these hidden lines do not show them clearly. In such cases, a sectional view is drawn.
A sectional view is made by passing an imaginary cutting plane through the product. One part is removed, exposing the interior details to view. The location of the imaginary cut is shown on a drawing with a cutting-plane line.
A sectional view frequently replaces one of the regular views. For example, a regular front view is replaced by a front section (see below).