About the author  ⁄ Robert T. Ratay, Ph.D., P.E.

Robert T. Ratay, Ph.D., P.E., is a structural engineer in private practice in New York, and an Adjunct Professor at Columbia University. He has been an expert consultant/witness on some 200 cases of structural failures, some of which resulted in changes to codes, regulations and practices. He is the Editor-in-Chief of three books: Handbook of Temporary Structures in Construction, 3rd Edition, Forensic Structural Engineering, 2nd Edition, and Structural Condition Assessment. He can be reached at Structures@RobertRatay.com.

This is Part 3 of a series of articles introducing illustrative examples of changes in design and construction codes, standards, regulations and practices that have followed catastrophic failures of construction cranes. Part 1, in the December 2010 issue of STRUCTURE®, focused on bridges, Part 2 in the April 2011 issue focused on buildings, and Part 3 is devoted to construction cranes.

It is a credit to our structural and construction engineering professions that failures have been and continue to be used to improve design, construction and regulatory practices. We do not just pay up, rebuild and walk away – we delve, we learn, and we improve.

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