A half-section is a view of an object showing one-half of the view in section, as in
figure 19 and 20.
| Figure 19 - Full and sectioned isometric views |
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| Figure 20 - Front view and half section |
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The diagonal lines on the section drawing are used to indicate the area that has been
theoretically cut. These lines are called
section lining or
cross-hatching.
The lines are thin and are usually drawn at a 45-degree angle to the major outline of the
object. The spacing between lines should be uniform.
A second, rarer, use of cross-hatching is to indicate the material of the object. One
form of cross-hatching may be used for cast iron, another for bronze, and so forth. More
usually, the type of material is indicated elsewhere on the drawing, making the use of
different types of cross-hatching unnecessary.
| Figure 21 - Half section without hidden lines |
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Usually hidden (dotted) lines are not used on the cross-section unless they are needed
for dimensioning purposes. Also, some hidden lines on the non-sectioned part of the
drawings are not needed (figure 12) since they become redundant information and may
clutter the drawing.
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