Unit 2 Vizualizing Shapes 15 Copyright Goodheart-Willcox Co., Inc. Therefore, the fi rst-angle projections are as follows: ■ Top view projects to the bottom of the box. ■ Bottom view projects to the top of the box. ■ Front view projects to the back of the box. ■ Rear view projects to the front of the box. ■ Right side view projects to the left side of the box. ■ Left side view projects to the right side of the box. As the global market expands, print readers, assemblers, machinists, and fabricators are experiencing more fi rst-angle projection drawings. Both methods of projection are acceptable in modern drawings. However, caution should be taken when drafting and reading drawings. The drafter or designer should never mix different projection methods, which can lead to confusion. It is equally important for the reader to recognize the two types of projections in order to interpret details correctly. Understanding the basic principles of projection will allow you to identify the contours and lines that defi ne a part. Arrangement of Views Carefully study the top view in Figure 2-2, which is directly above and aligned with the front view by projectors. The right side view also has a direct relationship to the front view through projected lines. As stated earlier, the standard layout of views is the top, front, and right side. In the design industry, however, there are exceptions. Although the right side view is preferred, using the left side view is acceptable if it describes the object more clearly. Another exception occurs if the left side has fewer obstructing lines than the right side. Figure 2-7 shows the standard layout of top, front, and right side views for a third-angle projection, along with their basic dimensions. Figure 2-8 shows the standard layout of top, front, and left side views for a fi rst-angle projection. Goodheart-Willcox Publisher Six principal view surfaces of a first-angle drawing are flattened, like a two-dimensional drawing. Figure 2-6 First-angle projection symbol