Chapter 9 Multiview Drawings 217
associated with it, the seven distances are
each measured one time and then projected
between the views.
When projecting points, width measure-
ments are projected between the front
and top views. Height measurements are
projected between the front and side views.
See Figure 9-17. Depth distances are projected
between the top and side views with a 45°
projection angle or a compass, Figure 9-18. Of
the two, the projection angle method is prob-
ably more accurate than the compass method
for most beginning drafters. However, if
careful and precise compass placement and
adjustment is followed and the compass is
kept properly sharpened, both methods work
very effectively.
All projection lines are drawn as construc-
tion lines. If these lines are drawn correctly,
they are very easily erased with a quality
eraser and erasing shield. Projection lines are
generally erased after all lines are darkened
to the proper line weights. Occasionally a
drafting instructor may require the student to
leave projection lines on a drawing to check
for proper usage.
Centering a Multiview
Drawing
In previous chapters of this text, you
have learned that the keys to high-quality,
efficient fi work are accuracy, neatness, and
speed. A drawing looks neater and more
professional if the views are evenly spaced
and centered on the drawing sheet. Centering
the views on a sheet is not diffi cult if one of
two basic methods is used. These methods
are discussed in the following sections.
Centering the Drawing with
Construction Lines
1. Examine the object to be drawn. Observe
its width, depth, and height dimensions,
Figure 9-19. Determine the orientation in
which the object will be drawn.
2. Measure the working area of the sheet
after drawing the border and title block. It
Figure 9-17
R2
45°
R1
Figure 9-18 Two accepted methods used to transfer the depth of the top view to the side view.