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    The loads on a structure which remain in a fixed position relative to the structure. On a crane bridge such loads include the girders, footwalk, cross shaft, drive units, panels, etc.

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    Displacement due to bending or twisting in a vertical or lateral plane, caused by the imposed live and dead loads.

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    A plate or partition between opposite side plates of a box girder, serving a definite purpose in the structural design of the girder.

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    A crane which runs on two bridge girders mounted between and supported by end trucks at each runway.

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    The girder on which the bridge drive machinery is mounted.

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    The cylindrical member around which a rope is wound for lifting or lowering the load.

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    Two speed travel control, with the second speed at one half or one third of main speed.

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    An operator’s compartment or platform on a pendant or radio controlled crane, having no permanently-mounted electrical controls, in which an operator may ride while controlling the crane.

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    A method of control by which the hoist motor is so connected in the lowering direction, that when it is over-hauled by the load, it acts as a generator and forces current either through the resistors or back into the line.