civil drafting technology

Seventh EditionBy David A. Madsen,

Terence M. Shumaker, and David P. Madsen

Civil Drafting Technology

Chapter 2

Computer-Aided Design and Drafting (CADD)

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.2

Figure 2–1: Model files contain the individual elements that make up the final drawing, such as the property lines, buildings, utilities, dimensions, and various drawing features on their own layers.

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.3

Figure 2–2: A sheet file brings the model files together to create the composite drawing, and it includes the border and title block.

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.4

Figure 2–3: A file structure for organizing drawing files.

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.5

Figure 2–4: A variety of line types are included in the U.S. National CAD Standard.

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.6

Figure 2–5: The text fonts recommended by the standard are the basic monotext font and a variety of forms of the Romans font.

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.7

Figure 2–6: a) Standard drawing sheet sizes (ASME Y 14.1). b) Standard metric drawing sheet sizes (ASME Y 14.1M).

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.8

Figure 2–7: A simplifies pictorial representation of a CADD layering system, showing how information is shared among drawing components. Typically, each group of items is drawn on its own layer.

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.9

Figure 2–8: The location of the insertion points on mapping symbols.

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.10

Figure 2–9: When you enter sheet layout, a real-size sheet of paper is placed over the top of the model drawing. Border line, title blocks, and notes are also found on the real-size paper layout. The model drawings and the layout sheet are put together for plotting.

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.11

Figure 2–10: An ergonomically designed workstation.

Civil Drafting Technology, Seventh EditionDavid A. Madsen, Terence M. Shumaker, David P. Madsen

© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights Reserved.12

Figure 2–11: Exercises that can help reduce workstation-related problems. You should consult with your doctor for further advice and recommendations before using any of these practices.