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Usually jib arms are attached to a vertical mast or tower or sometimes to an inclined boom. In other jib-less designs such as derricks, the load is hung directly from a boom which is often anomalously called a jib. A camera jib or jib arm in cinematography is a small crane that holds nothing but the camera. [4]
Plan of the crane. The Beardmore Crane had two opposite cantilevered jibs, both equipped with moving winches, for a total length of 233 feet (71 m). [1] From the jib to the ground extended a tapering lattice, which was enclosed by a lattice tower.
The "hammerhead", or giant cantilever, crane is a fixed-jib crane consisting of a steel-braced tower on which revolves a large, horizontal, double cantilever; the forward part of this cantilever or jib carries the lifting trolley, the jib is extended backwards in order to form a support for the machinery and counterbalancing weight. In addition ...
The original goods shed was much longer than it is today, extending northward almost to the end of the railway station platform, where the carpark is now, and utilizing the jib crane. [5] [1] The original 1875 plans for the station arrangement for Orange show that the Orange precinct was intended to service more than just passenger trains.
A level-luffing crane is a crane mechanism where the hook remains at the same level while luffing: moving the jib up and down, so as to move the hook inwards and outwards relative to the base. [1] Usually the description is only applied to those with a luffing jib that have some additional mechanism applied to keep the hook level when luffing.
The large girders provided runways for a pair of 10-ton overhead cranes above each way and lighter 5-ton jib cranes from the sides. Along the centre line ran a light Titan crane, with a reach of 135 feet and able to carry a 3-ton load at full radius, and 5 tons closer in. The cranes were electrically-powered and built by Stothert & Pitt of Bath ...