Pictured below are three new low-profile cranes that Mitsui Engineering & Shipbuilding Co. Ltd (MES) recently delivered to Tokyo Port Terminal (TPT), which is currently operated by the Tokyo Port Authority.
With an outreach of 63m for handling a 22-row-wide vessel, and with a rail gauge of 43.5m, the cranes are the largest lowprofile units built to date. They have a lift height of 40/18m under the spreader above/below the waterside rail, and a maximum structural height of 52.35m above the waterside rail. Lifting capacity under the spreader is 65t for twin lift operations.
Low-profile cranes on a 100ft (30.5m) gauge with a 62m outreach would be extremely heavy, but, with a 43.5m outreach, MES has been able to keep the total crane weight to 2,100t. The cranes have eight wheels per corner, and feature a moving E-house and a seismic isolation system, which MES has developed for ports with a high seismic risk, and used at several terminals in Japan and elsewhere.
Operational speeds are 90/180 m/min for the hoist, 240 m/min for the trolley, and 45 m/min for the gantry. The boom traverse system operates at 20 m/min.
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This complete item is approximately 300 words in length, and appeared in the November 2017 issue of WorldCargo News, on page 1. To access this issue download the PDF here.
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