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ASME B30.17-2003 pdf download.OVERHEAD AND GANTRY CRANES (TOP RUNNING BRIDGE,
SINGLE GIRDER, UNDERHUNG HOIST).
crane, gantry: a crane similar to anoverhead crane, except that the bridge for carrying the trolley or trolleys is rigidly supported on two or more legs running on fixed rails or other runway (refer to Fig. 4). crane, hot molten material-handling: an overhead crane used for transporting or pouring molten material. crane, manually operated: a crane whose hoist mechanism is driven by pulling an endless chain or whose travel mechanism is driven in the same manner or by manually moving the load. crane, outdoor: an overhead or gantry crane that operates outdoors and for which provisions are not available for storage in an area that provides protection to the crane from weather conditions. An indoor crane that may operate outdoors on a periodic basis is not classified as an outdoor crane. crane, overhead: a crane with a movable bridge carrying a movable or fixed hoisting mechanism and traveling on an overhead, fixed runway structure (refer to Figs. 1 and 3 for the types covered by this volume). crane, power-operated: a crane whose mechanism is driven by electric, pneumatic, hydraulic, or internal combustion means. crane, pulpit-operated: a crane whose movements are con- trolled by an operator through the use of controllers located in a control room, a fixed or movable cab, or a platform that is independent of the crane. crane, remote-operated: a crane whose movements are con- trolled by an operator through the use of controllers contained in a portable operating station not attached to the crane.
overload: any load greater than the rated load. pendant station: controls suspended from the crane for operating the unit from the floor. qualified person: a person who, by possession of a recog- nized degree in an applicable field or certificate of pro- fessional standing or by extensive knowledge, training, and experience, has successfully demonstrated the abil- ity 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 push aside loose obstructions. rope: refers to wire rope unless otherwise specified. runway: an assembly of rails, beams, girders, brackets, and framework on which the crane travels. serviceplatform: a meansprovidedforworkers to perform maintenance, inspections, adjustments, and repairs of cranes. shall: use of this word indicates that a rule is mandatory and must be followed. should: use of this word indicates that a rule is a recom- mendation, the advisability of which depends on the facts in each situation. side pull: the component of the hoist pull acting horizon- tally when the hoist lines are not operated vertically. sills: horizontal structural members that connect the lower ends of two or more legs of a gantry crane on one runway. span: the horizontal distance, center to center, between runway rails.ASME B30.17 pdf download.