Copyright Goodheart-Willcox Co., Inc. Unit 6 Section Views 127 section is labeled SECTION A-A and is removed to the side. It could have also been drawn at a different scale to enlarge the view, if desired. If a drawing can be clearly expressed without com- plete section lines, the section lines can be segments drawn only along the visible object lines. This is called an outline section and is only used on large views with a lot of surface area to be section lined. See Figure 6‑14. Large parts are often drawn with outline sections, making the drawing easier to read. Auxiliary views are projected in directions other than the six principal directions. Auxiliary views are discussed in Unit 7. The principles of section views can logically be applied to auxiliary views when the cutting plane is oriented in an auxiliary-view direction, Figure 6‑15. Any type of section found on regular views—full, half, broken-out, etc.—may also be found on auxiliary views. When an auxiliary view is sectioned and the portion of the view extending beyond the section is not fully shown, the view should follow the guidelines for any partial view of an object. Sections in Assembly Drawings When multiple parts are shown assembled in a drawing, the drawing is called an assembly drawing. Assembly drawings are discussed in Unit 16. With respect to assembly drawings of multiple parts, many of the parts may be shown in full section and distinguished by orienting the section lines at dif- ferent angles or spacing. For example, the largest part may feature section lines that slope to the right, the second part may feature section lines that slope to the left, and then additional parts may have section lines at other angles or with closer spacing, Figure 6‑16. Also note in Figure 6‑16 the conventional practice of leaving fasteners and shafts uncut as the cutting plane passes through the assembly. Fasteners and shafts are usually more recognizable by their exterior features. Goodheart-Willcox Publisher Figure 6‑14. The lines of an outline section are drawn only along the visible lines. Large area Goodheart-Willcox Publisher Figure 6‑15. An auxiliary view can also be a section view. Goodheart-Willcox Publisher Figure 6‑16. Fasteners and shafts are not sectioned in assembly drawings. The section lines should have a unique appearance for each part.