ASME B30.17:2015 pdf download

ASME B30.17:2015 pdf download.Cranes and Monorails (With Underhung Trolley or Bridge)
Volume B30.17 includes provisions that apply to the construction, installation, operation, inspection, testing, and maintenance ofhand-operated and power-operated overhead cranes and monorail systems with an under- hung trolley and/or bridge. These cranes and monorail systems shall support one or more hoists used for verti- cal lifting and lowering of freely suspended, unguided loads, and include top running and underhung bridge cranes, gantry cranes, traveling wall cranes, jib cranes, polar gantry cranes, portable gantries, other cranes hav- ing the same fundamental characteristics, and monorail systems including trolleys (carriers) and end trucks. Track sections and their support systems for monorail systems, runways and their support systems for under- hung cranes, and runway rails for top running cranes are also within the scope of this Volume. Provisions for similar equipment used for a special purpose, such as, but not limited to, nonvertical lifting service, lifting a guided load, or lifting personnel, are not included in this Volume.
abnormal operating conditions: environmental conditions that are unfavorable, harmful, or detrimental to or for the operation of the crane or trolley, such as excessively high or low ambient temperatures, exposure to weather, corrosive fumes, dust- or moisture-laden atmospheres, and hazardous locations. below-the-hook lifting device: a device used for attaching loads to a hoist. The device may contain components such as slings, hooks, and rigging hardware addressed by other ASME B30 Volumes or other standards. brake: a device, other than a motor, used for retarding or stopping motion by friction or power means. braking, hydraulic: a method of controlling or reducing speed by means of displacement of a liquid. braking means: a method or device used for stopping/ holding motion by friction or power.braking, mechanical: a method of controlling or reducing speed by friction. braking, pneumatic: a method of controlling or powering a brake by means of compressed gas. bridge: the part of an overhead crane consisting of one or more girders, trucks, and (if applicable) a drive mech- anism that carries the trolley(s). bridge girder: a crane member on which a trolley or trol- leys travel horizontally, mounted between and sup- ported by the end trucks. bridge travel: the crane movement in a direction parallel to the crane runway. bumper (buffer): a device for reducing impact when a moving crane or trolley reaches the end of its permitted travel, or when two moving cranes or trolleys come into contact. This device may be attached to the bridge, trolley, or runway stop. cab: an operator’s compartment attached to a crane or trolley. cab, normal: an operator’s compartment used for control- ling a cab-operated crane or trolley. cab, skeleton: an operator’s compartment used for occa- sional cab operation of, normally, a floor- or remote- operated crane or trolley. 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. chain, load: the load-bearing chain in a hoist. clamp, hanger: a type of suspension fitting used to sup- port tracks from an overhead structure which is fastened to the structure by mechanical means rather than by welding or direct bolting. clearance: the distance from any part of the crane to the nearest obstruction. collectors, current: contacting devices for conducting cur- rent from runway or bridge conductors.conductors, bridge: the electrical conductors located along the bridge structure of a crane that transmit control sig- nals and power to the trolley(s). conductors (electrification): the system by which the mov- ing equipment receives its electrical power (see Fig. 17-0.2-1). conductors, runway (main): the electrical conductors located along a crane runway that transmit control sig- nals and power to the crane. controller: a device by means of which the operator con- trols the speed, acceleration, torque, and/or direction of motor-driven equipment.