or edges — the use of dashed lines on orthographic views could result in a confusing drawing.
The dashed lines could make the drawing difficult to read and thus difficult for the reader to
form a visual image of what the inside of the object looks like. An example of an object with a
complex interior is shown in Figure 16.13. For objects with complex interiors,sectional views
are used. Sectional views reveal the inside of the object. A sectional view is created by making
an imaginary cut through the object, in a certain direction, to reveal its interior. The sectional
views are drawn to show clearly the solid portions and the voids within the object.
Let us now look at the procedure that you need to follow to create a sectional view. The
first step in creating a sectional view involves defining the cutting plane and the direction of the
sight. The direction of the sight is marked using directional arrows, as shown in Figure 16.14.518 Chapter 16 Engineering Drawings and Symbols
Top view
Front view
Sectional view
■Figure 16.13
An object with a complex interior.A A
Cutting plane
Directional
arrowSection A–A Cross-hatching
■Figure 16.14
A sectional view of an object.
Crosshatch patterns also indicate
the type of material that parts are
made from.62080_16_ch16_p504-549.qxd 5/22/10 12:31 AM Page 518
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