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ASME B30.11-2004 pdf download

ASME B30.11-2004 pdf download.Monorails and Underhung Cranes.
SECTION 11-0.1 SCOPE OF B30.11 Within the general scope defined in Section I of the introduction, ASME B30.11 applies to underhung cranes and monorail systems where load-carrying members, such as end trucks or carriers (trolleys), travel either on the external or internal (see Fig. 9) lower flange of a runwaytracksection, single monorailtrack,crane bridge girder, or jib boom (see Fig. 1), including all curves, switches, transfer devices, lift and drop sections, and associated equipment. This Volume includes provisions of both power-driven and hand-operated equipment on which the carriers are independently controlled. This equipment is grouped together because of the similarity of construction and because of common considerations which are peculiar to this type of equipment. Systems usedfortransportingpersonnelrequire specialconsider- ations and are not included in this Volume. Also excluded from this Volume are conveyor systems, including power and free conveyors. SECTION 11-0.2 DEFINITIONS abnormal operating conditions: environmental conditions that are unfavorable, harmful, or detrimental to or for the operation of the crane or carrier, such as excessively high or low ambient temperatures, exposure to weather, corrosive fumes, dust- or moisture-laden atmospheres, and hazardous locations. administrative or regulatory authority: governmental agency or the employer in the absence of governmental jurisdiction. appointed: appointed by a duly constituted administra- tive or regulatory authority. brake: a device, other than a motor, used for retarding or stopping motion by friction or power means. bridge (crane) girder: crane member on which carriers travel, horizontally mounted between and supported by the end trucks. bridge (crane) travel: crane movement in a direction paral- lel to the crane runway. 1 cab: an operator’s compartment attached to a crane or carrier. cab, normal: operator’s compartment used for controlling a cab-operated crane or carrier. cab, skeleton: operator’s compartmentused for occasional cab operation of, normally, a floor- or remote-operated crane or carrier. carrier: (also known as trolley) a unit that travels on the bottom flange of a monorail track, jib boom, or bridge girder to transport a load. carrier, automatic dispatch: a carrier that, when activated, operates through a preset cycle or cycles. carrier, cab-operated: a carrier controlled by an operator in a cab attached to the carrier (see Fig. 2).
carrier, hot molten material: an overhead carrier used for transporting or pouring molten material. carrier, manually operated: a carrier whose travel mecha- nism is driven by pulling an endless chain or by manu- ally moving the load. carrier, power-operated: a carrier whose mechanism is driven by electric, pneumatic, or hydraulic means. carrier, pulpit-operated: a carrier operated from a fixed operator station not attached to the carrier. carrier, remote-operated: a carrier that is controlled by any method other than a means suspended from the carrier and operated by an operator not in a pulpit nor in the cab attached to the carrier. chain, hand: the chain grasped by a person to apply force required for lifting, lowering, or traveling motion. NOTE: Hand chain properties do not conform to those shown in ASME B30.9. chain, load: the load-bearing chain in a hoist. NOTE: Load chain properties do not conform to those shown in ASME B30.9. clamp: a type ofsuspension fitting used to support tracks from an overhead structure which is fastened to the structure by mechanical means rather than by welding or direct bolting. conductors (electrification): the system by which the mov- ing equipment receives its electrical power (see Fig. 3). conductors, guarded: barorwire used to transmitelectrical power, guarded to minimize inadvertent contact with the conductor. 2 conductors, open: bar or wire, not guarded, used to trans- mit electrical power. controller: a device or group of devices that govern, in a predetermined manner, the power delivered to the apparatus to which it is connected. crane: a machine for lifting and lowering a load and moving it horizontally. Cranes, whether fixed or mobile, are driven manually, by power, or by a combination of both. crane, automatic: a crane that, when activated, operates through a preset cycle or cycles. crane, cab-operated: a crane controlled by an operator in a cab attached to the bridge or carrier (see Fig. 4). crane, cantilever gantry: a gantry or semigantry crane in which the bridge girders or trusses extend transversely beyond the crane runway on one or both sides. crane, double-girder: a crane having two bridge girders mounted between, and supported from, the end trucks. crane, floor-operated: a crane that is controlled by a means suspended from the crane or carrier, or controlled from a wall-mounted station and operated by an operator on the floor or on an independent platform (see Fig. 5). crane, gantry: a crane similar to anoverhead crane, except that the bridge for carrying the carrier(s) is rigidly sup- ported on two or more legs running on a fixed rail or other runway.

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