Orthographic Projections, Continued
First-angle
projections
First-angle projection places the object on the profile plane with the vertical
plane on the left and the horizontal plane on the bottom and is used
throughout Europe. This position locates the top view below the front view,
the right-side view on the left side of the front view, and the bottom view
above the front view. Because the positioning of the views initially seems
illogical, first-angle projections is not taught or practiced in the United
States.
Figure 6-24 shows how the principal views are hinged in first-angle
projection.
Figure 6-24.—Principal views in first-angle projection.
Continued on next page
6-29
