Crane Raise with Zero Downtimeby William L. Casper, Casper, Phillips & Associates, Tacoma, United States,
Alex Surko, Casper, Phillips & Associates, Tacoma, United States,
Abstract: Massachusetts Fort Authority (MPA) was faced with a dilemma. Its Conley Terminal tenants needed higher cranes but could not relinquish the cranes for more than a few days at a time. No substitute cranes were available. Trucking to Elizabeth, NJ was possible, but the cost would have been about $300,000 per week. This paper describes MPA's solution. The crane raise was accomplished by use of a self-jacking scheme that allowed the cranes to be restored to service whenever needed. Raising a crane 20 feet (6.1 meters) is a common event but this project demonstrated a technique for completing the work within a very limited time frame. We expect future raises will be done in a fraction of the time available for this project.
Subject Headings: Cranes | Rehabilitation | Frames | Trucks | North America | United States | New Jersey | Massachusetts
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