Photo Courtesy of Washington State Dept. of Transportation Much like a gigantic tooth extraction, Mammoet's lifting device pulled up Bertha's cutterhead. Related Links: At Last, Highway 99 TBM Rescued in Seattle Lifting Bertha, the Worlds Largest Tunnel Boring Machine Engineers never planned to lift "Bertha"—at 57.5 ft in dia, the world's largest active tunnel-boring machine—out of its bored tunnel. But when it came time to remove for repair her 2,000-ton cutter-drive unit from 120 ft below downtown Seattle, heavy-lift specialist Mammoet created a custom gantry system for the job.Due to the site constraints and soft waterfront soil conditions, Mammoet didn't
This week we look at a reflectorless total station from Topcon Positioning Systems and a compact track loader from Caterpillar. Click to begin the slide show.
Photo by Tudor Van Hampton / ENR Sany's SCC8500 crawler crane was on display at Conexpo 2014. Related Links: Manitowoc Gains Edge in Sany Patent Case Manitowoc-Sany Lawsuit Pivots on Crane Counterweights The U.S. International Trade Commission on April 16 ruled that China-based equipment maker Sany Heavy Industries violated patents and trade secrets held by Manitowoc related to the crane manufacturer's counterweight system. The complaint was first lodged with the ITC in July 2013, after Sany had introduced its SCC8500 crawler crane the previous year. The crawler crane has a movable counterweight tray that is similar to the ones used
Photo Courtesy of Link-Belt Construction Equipment Co. A mobile crane lifts steel. New crane standard no longer allows users to exceed the rated capacity, even for load tests. Related Links: Crane-Age Limits: Anti-Dumping Bans Disguised as Safety? Link-Belt Gives Crane Owners Telematics Data The latest revision of the American national standard for mobile cranes, ASME B30.5-2014, brings major changes to the rules governing how crane users are to work within a lifting machine's capacity range, or load chart, and offers new guidance for inspection, maintenance and testing procedures.Mobile cranes today are designed to a finer edge than in 1968, when
Motorbooks The book costs $45 and contains many photos from historian Keith Haddock. Related Links: Caterpillar Is Quick on the Uptake Caterpillar's New Global Headquarters Takes Shape Right off the bat, veteran equipment writer Frank Raczon admits that the Caterpillar family tree, including the extended family of its capable dealer network, contains too many branches to appear in one book. However, he captures many of the earthmoving giant’s iconic machines in “Caterpillar: Modern Earthmoving Marvels.”Published by Motorbooks, priced at $45 and containing many photos from historian Keith Haddock, the new 224-page hardbound book begins with the pedigree’s namesake: the tracked
The American Institute of Steel Construction continues to drill deep into the steel sector's supply chain to improve both e-commerce and steel deliveries to fabricators.
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