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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] Usually jib arms are attached to a vertical mast or tower or sometimes to an inclined boom.
Jib: the jib, or operating arm, extends horizontally from the crane. A "luffing" jib is able to move up and down; a fixed jib has a rolling trolley car that runs along the underside to move loads horizontally. Counter jib: holds counterweights, hoist motor, hoist drum and the electronics. [65]
A jib can be used for getting high or low shots which are difficult for a hand-held camera operator to get, or shots which need to move a short distance horizontally or vertically, without the expense and safety issues of putting a camera operator on a crane for a crane shot or laying track for a camera dolly. A jib can even be mounted on a ...
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 crane could be used in a limited capability, although it was not until 1919 that replacement screws of sufficient quality were acquired. [1] Titan was completed on 3 December 1919. [2] On completion, the crane was handed over to the RAN. [3] Titan ' s cantilever-jib arm could reach 190 feet (58 m) above the surface at maximum extension. [4]
I have even considered getting those arm sleeves that are intended for gardeners to avoid being cut up by branches or thorns but are now used as accessories. They’re available in a wide range of ...
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