PRIN. OF DRAFTING AND SHOP DRAWINGS - OD1641 - LESSON 1/TASK 5
(4) Drawing Zones. Large drawings are divided into zones similar to those used
on a map. Letters are used to define the horizontal zones and numbers are used to
define the vertical zones.
Figure 93 (on the previous page) illustrates a zoned
drawing.
Zone numbers are usually written in boxes with the letter over the
number.
(5) Drawing Notes.
Drawing notes are written instructions that are included as
part of a drawing.
They are written because they cannot be drawn (for example,
heat treating or finishing instructions). Figure 88 (on page 101) includes a note
that defines the torquing requirements of the assembly.
d. A Drawing Detail. A drawing detail is a special kind of partial drawing. It
is used to enlarge a specific part of a drawing that is too small or too
complicated to be completely understood if only shown in its actual size. Figure
94 is an example of a drawing that includes a drawing detail.
FIGURE 94.
AN EXAMPLE OF A DRAWING
DETAIL.
105
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