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Technical Library

Technical Library PaperPatrick J. Welch "Weighing Elevator Moderization" Building Operating Management, May 2010 (PDF: 1.63MB)

Technical Library Paper Amy K. Bomberger "VTX® Celebrates Its 10th Anniversary" Elevator World, April 2010 (PDF: 625KB)

Technical Library Paper"George Washington Bridge Bus Station" Elevator World, January 2007 (PDF: 1.43MB)

Technical Library PaperAmy K. Bomberger "WMATA Escalator Modernization" Elevator World, March 2006 (PDF: 412KB)

Technical Library PaperAmy K. Bomberger "World Trade Center Temporary PATH Station" Elevator World, March 2005 (PDF: 793KB)

Technical Library Paper"Baltimore Metro" Elevator World, October 2005
(PDF: 1.08MB)

Technical Library Paper"Phoenix Sky Harbor International Airport" Elevator World, November 2004 (PDF: 1.08MB)

Technical Library PaperPatrick J. Welch "Recommended Grounding Practices for Modern Elevator Drives" Elevator World, April 2001 (PDF: 234KB)

Technical Library Paper Patrick J. Welch "APTA Heavy Duty Escalator Guidelines" APTA Rail Conference, June 2001 (PDF: 54KB)

Technical Library Paper Patrick J. Welch "Remote Monitoring of Elevators and Escalators: Managing the Alarms and the Maintenance" APTA Rail Conference, June 2001 (PDF: 58KB)

Technical Library Paper Patrick J. Welch "Escalator Modernization Versus Escalator Replacement" Elevator World, August 2000 (PDF: 195KB)

Technical Library Paper Patrick J. Welch "Elevator Guidelines for Emergency Generators" Elevator World, March 1998 (PDF: 106KB)

Cleveland Park Station Looking up an elevator shaft