Rope Traction Theory & Practice Course
Author: GEORGE GIBSON
Format: CEU (CONTINUING EDUCATION)
Click here to order Rope Traction Theory & Practice Presentation (Digital Video). (Not included with course)
This course is the first offered by Elevator World where the study material is a digital video presentation. You can earn 3 contact hours (.3 CEU's) by viewing the presentation and completing the assessment exam online.
Approved for Continuing Education by NAEC for CET/CAT, and by the States of Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Kentucky, Mississippi, Montana, Oklahoma, Pennsylvania, Virginia, Washington, West Virginia, Wisconsin.
Learning Objectives - After reviewing the video, you should:
- Have developed a basic understanding of the principles of rope traction, specifically, that the amount of available traction between the suspension (hoist) ropes and grooves must always exceed the required traction to move the hoistway masses in a controlled and safe manner.
- Have developed a basic understanding that the amount of available traction between the drive sheave grooves and suspension ropes is a function of the actual coefficient of friction between them, the groove shape, and the arc of contact that the ropes make as they wind over the drive sheave between their entry and exit points.
- Understand that the major inherent safety feature of a traction drive is its ability to lose traction if either the car or counterweight bottoms on its buffer.
- Understand that the type of rope lubricant is important, and that it affects the available traction between the suspension ropes and drive sheave grooves.
- Have developed a basic understanding of the construction, terminology and characteristics of suspension (hoist) members, primarily steel wire ropes, and to a lesser degree, non-metallic ropes and coated steel belts.
- Understand that the number and size of hoist ropes on any elevator is a function of the strength of the ropes and the factor of safety, and that the groove pressures developed between the ropes and groove surfaces is influenced by several parameters.
- If you do not already have an account on elevatorbooks.com, you will need to create one. NOTE: the name of the person purchasing must be the same name as the person who will take the exam.
- For articles, click the "Read Article" tab above to download and study the article. For other courses, be sure to purchase the corresponding book.
- Include your full name when purchasing the exam.
- Follow the instructions on the purchase confirmation page to log in to the Online Testing Center.
- If you scored 80% or above, you can immediately print your certificate of completion. If you fail the exam, you will be given instructions on how to pay a re-take fee and take the exam again.
George W. Gibson is the president of George W. Gibson & Associates, Inc., an elevator consulting firm specializing in elevator technology, strategic technical planning, codes and standards, product safety, and technical support of litigation. Prior to founding his own company, Gibson had a 37-year career with Otis, where he held several design engineering, engineering management and corporate management positions. He is the chairman of the Advisory Board of NAESA International, a past regent of the Elevator Escalator Safety Foundation, a member of the Board of Executives of the International Association of Elevator Engineers, and a member of the board of directors of Elevator World, Inc. He is a founding member of the OEI Standards Committee. He is a member of the American Society of Mechanical Engineers (ASME), where he has served as chairman on a number of committees and on its board of directors. In his role as chairman of the ASME A17 International Standards Committee, he has been the head of the U.S. delegation to the International Standards Organization Technical Committee 178 on Elevators and Escalators since 1981. In 1997, he was the recipient of the ASME Codes and Standards Medal, and was awarded the ASME grade of fellow, and the ASME Dedicated Service Award in 2007.