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This specific example uses a level luffing mechanism to maintain the load at approximately the same vertical height as the jib moves through its range of travel. A jib or jib arm is the horizontal or near-horizontal beam used in many types of crane to support the load clear of the main support. [1] [2] An archaic spelling is gib. [3]
wooden jib crane, 20-foot mast, 15-foot boom, 4.5-ton capacity, C&P; punch & shear, 30-inch throat (used for rivet holes) Car shop. The car shop would build the wooden parts of the engine, such as the cab. 18-inch rip saw; Lowell drill press; Tice shaper/molder; Blacksmith shop. Fulton 500-pound power hammer (for forging)
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 "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 ...
EN 1993-6 gives principles and application rules for the structural design of crane runaway beams and other crane supporting structures including columns and other member fabricated from steel. This part is intended to be used with Eurocode EN 1991-1 and it covers overhead crane runaways inside buildings and outdoor overhead crane runaways.
The concrete wall appears to be constructed of pre-fabricated panels. The T433 jib crane was constructed in 1886 and sits on a solid concrete pedestal/platform and is operational. The coal stage was constructed in 1949 out of timber bearers supported on steel beams on steel uprights made from rail tracks on the site of the original 1886 coal stage.
In August 1878 the crane had been completed and tested, at a cost of £3,600 for the machinery, plus the masonry foundations. The jib has a radius (reach) of 35 feet (11 m) and a height of 40 feet (12 m). The crane weighs 120 tons.
The crane was powered by a semi-portable steam engine in a small cabin at the rear of the jib, also helping as a counterweight. 1871 timber queen post truss jib, for the North Sea Canal. Construction of the Dutch Noordzeekanaal from 1865 to 1876 used a variety of cranes, including two significant examples of the Hercules type. Having little ...