Special Acknowledgment Special acknowledgment is given to Dennis Alan Schwartz for his extensive review and support for the revision of this textbook using the ASME Y14.5-2009 standard. Dennis is the Director of Engineering Services at Wright Medical Technology, Inc. in Arlington, Tenn. Wright Medical Technology is a global manufacturer and distributor of orthopedic products. Dennis is responsible for all U.S. engineering drawings and CAD models and manages engineering changes required on drawings. Dennis has more than 35 years of mechanical design and drafting experience. Dennis is an American Design Drafting Association (ADDA) Certified Drafter, and an American Society of Mechanical Engineers (ASME) Certified Senior Level GD&T Professional. Dennis is a member of the ADDA Board of Directors. Dennis holds a Master of Science degree in Operations Management from the University of Arkansas, and a Bachelor of Science degree in Management from Christian Brothers University in Memphis, Tenn. About the Authors David A. Madsen is the president of Madsen Designs Inc. (www.madsendesigns.com) David A. Madsen is the president of Madsen Designs Inc. ( www.madsendesigns.com David A. Madsen is the president of Madsen Designs Inc. ( and an Authorized Autodesk Author. David is Faculty Emeritus of Drafting Technology and the Autodesk Premier Training Center at Clackamas Community College in Oregon City, Oregon. David was an instructor and department Chairperson at Clackamas Community College for nearly 30 years. In addition to community college experience, David was a Drafting Technology instructor at Centennial High School in Gresham, Oregon. David is a former member of the American Design Drafting Association (ADDA) Board of Directors and was honored by the ADDA with Director Emeritus status at the annual conference in 2005. David has extensive experience in mechanical drafting, architectural design and drafting, and building construction. David holds a Master of Education degree in Vocational Administration and a Bachelor of Science degree in Industrial Education. David is the coauthor of Architectural AutoCAD, Architectural Desktop and its Applications, Architectural Drafting Using AutoCAD, AutoCAD and Its Applications: Basics, Advanced, and Comprehensive, AutoCAD Essentials, and other textbooks in the areas of architectural drafting, mechanical drafting, engineering drafting, civil drafting, architectural print reading, and mechanical print reading. David P. Madsen is the president of Engineering Drafting & Design, Inc., the vice president of Madsen Designs Inc. (www.madsendesigns.com), an Authorized Autodesk Author, and a SolidWorks Research Associate. Dave provides drafting and design consultation and training for all disciplines. Dave has been a professional design drafter since 1996 and has extensive experience in a variety of drafting, design, and engineering disciplines. Dave has provided drafting and computer-aided design and drafting instruction to secondary and postsecondary learners since 1999 and has considerable curriculum, program coordination, and development experience. Dave holds a Master of Science degree in Educational Policy, Foundations, and Administrative Studies with a specialization in Postsecondary, Adult, and Continuing Education a Bachelor of Science degree in Technology Education and an Associate of Science degree in General Studies and Drafting Technology. Dave is the author of Inventor and its Applications and coauthor of Architectural Drafting Using AutoCAD, and AutoCAD and Its Applications: Basics and Comprehensive, and other textbooks in the areas of architectural drafting, mechanical drafting, engineering drafting, civil drafting, architectural print reading, and mechanical print reading. 7