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The floating barge-crane, originally named Marine Boss, was built for Murphy Pacific Marine.The barge was assembled by Zidell Explorations from scrapped ship steel in Oregon [2] in 1966 and fitted in San Francisco with a heavy 500-ton revolving crane made by Clyde Iron Works [3] to perform the heavy girder and deck-section lifts for construction of the 1967 San Mateo-Hayward Bridge.
USS Lewis B. Puller (ESB-3), (formerly USNS Lewis B. Puller (T-ESB-3), and (T-MLP-3/T-AFSB-1) prior to that) [17] [18] is the first purpose-built expeditionary mobile base vessel (previously classified as a mobile landing platform, and then as an afloat forward staging base) for the United States Navy, and the second ship to be named in honor of Chesty Puller.
Harbor Freight Tools, commonly referred to as Harbor Freight, is an American privately held tool and equipment retailer, headquartered in Calabasas, California. It operates a chain of retail stores, as well as an e-commerce business. The company employs over 28,000 people in the United States, [5] and has over 1,500 locations in 48 states. [6] [7]
The polyspastos, when worked by four men at both sides of the winch, could readily lift 3,000 kg (6,600 lb) (3 ropes x 5 pulleys x 4 men x 50 kg or 110 lb = 3,000 kg or 6,600 lb). If the winch was replaced by a treadwheel, the maximum load could be doubled to 6,000 kg (13,000 lb) at only half the crew, since the treadwheel possesses a much ...
The Ford continued in this duty until 2006 when the JAW Iglehart, former fleet mate of the Ford, was retired from service and took over the Ford's duties in Superior. [4] Wooden Nameboard from Steamship J. B. Ford on display at the Buffalo Harbor Museum in Buffalo, N.Y. The Ford was moved to a storage dock awaiting orders to scrap the vessel.
The tools operate on the basis of the hydraulic fluid pressure of up to 720 bars (10,400 psi; 72 MPa), which must be provided from a power source. At present, there are three different means of generating pressure. The most commonly used source is a separate power unit, small petrol (gasoline) engine connected to a hydraulic pump.
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