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Crane Glossary
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LATERAL FORCES:
horizontal forces perpendicular to the axis of the member being considered.
LIFT:
Maximum safe vertical distance through which the hook, magnet, or bucket can move.
LIFT CYCLE:
Single lifting and lowering motion (with or without load).
LIFTING DEVICES:
Buckets, magnets, grabs and other supplemental devices, the weight of which is to be considered part of the rated load, used for ease in handling certain types of loads.
LIMIT SWITCH:
A device designed to cut off the power automatically at or near the limit of travel for the crane motion.
LINE CONTACTOR:
A contactor to disconnect power from the supply lines.
LIVE LOAD:
A load which moves relative to the structure under consideration.
LOAD BLOCK:
The assembly of hook, swivel, bearing, sheaves, pins and frame suspended by the hoisting ropes.
LOAD CARRYING PART:
Any part of the crane in which the induced stress is influenced by the load on the hook.
LOAD CYCLE:
One lift cycle with load plus one lift cycle without load.
LONGITUDINAL STIFFENERS:
Horizontal members attached to the web of the bridge girder to prevent web buckling.
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