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Definitions

 

load block

sheave


load block: the assembly of hook or shackle, swivel, bearing, sheaves, pins, and frame suspended by the hoisting rope or load chain. This shall include any appurtenances reeved in the hoisting ropes.

lockout/tagout: the placement of a lock/ tag on the energy isolating device with an established procedure.

main hoist: the primary hoist mechanism provided for coasting. lifting and lowering the rated load.

main trolley: a trolley having an operator's cab attached to it.

noncoasting mechanical drive: a drive that automatically results in decelerating a trolley or bridge when power is not available.

normal operating conditions (of cab-operated cranes): conditions during which a crane is performing functions within the scope of the original design. Under these conditions, the operator is at the operating control devices, and there is no other person on the crane.

normal operating conditions (of floor-operated cranes): conditions during which a crane is performing functions within the scope of the original design. Under these conditions, the operator is at the operating control devices that are attached to the crane but operated with the operator off the crane, and there is no person on the crane.

normal operating conditions (of remote-operated cranes): conditions during which a crane is performing functions within the scope of the original design. Under these conditions, the operator is at the operating control devices that are not attached to any part of the crane,

overload: any load greater than the rated load (see para. 2-3.2.1.1).

parts of line: the number of lines of rope supporting the load block.

pendant station: controls suspended from the crane for operating the unit from the floor.

primary upper-limit device: the first device that, when actuated, limits hoisting motion in the upward direction.

qualified person: a person who, by possession of a recognized degree in an applicable field or a certificate of professional standing, or who by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work.

rail sweep: a device attached to the crane and located in front of the crane's leading wheels to remove obstructions.

rated load (capacity): the maximum load designated by the manufacturer for which a crane or individual hoist is designed and built.

reeving: a system in which a rope travels around drums or sheaves.

runway: an assembly of rails, beams, girders, brackets, and framework on which the crane travels.

service platform: a means provided for workers to perform maintenance, inspections, adjustments, and repairs of cranes.

shall: this word indicates that a rule is mandatory and must be followed.

sheave: a grooved wheel or pulley used with a rope to change direction and point of application of a pulling force.