ASME B30.19-2016 pdf download
ASME B30.19-2016 pdf download.Cableways.
head tower (mast): a vertical support structure, guyed or counterweighted for stability, whose purpose is to support the track cable and operating ropes. The head tower is the tower located closest to the load hoist and inhaul-outhaul hoist. inhaul-outhaul (rope): the rope system that pulls the trol- ley and load toward the head tower (inhaul), or pulls the trolley and load away from the head tower (outhaul). inhaul-outhaul hoist (trolley hoist): a hoist having two drums, one of which winds on rope while the other drum simultaneously unwinds rope; or a single drum hoist from which the rope winds on one end while the rope unwinds from the other drum end (see Figs. 19-0.2.2-1, 19-0.2.2-2, and 19-0.2.2-3). The hoist is powered by a prime mover. lazy guy: fixed length member(s) of rope that prevents luffing the tower(s) (mast) beyond the distance estab- lished by the luffing hoist. load, maximum design: the forces in a particular compo- nent of the cableway resulting from the loading condi- tion that causes the highest stress in that component. load, working: the external load applied to the cableway lower load block, including the weight of load-attaching equipment such as shackles, slings, etc. load block, lower: the assembly of hook or shackle, swivel, sheaves,pins, andframesuspendedbythehoistingrope. loadblock, upper: the assembly ofsheaves, pins, and frame from which the hoisting rope suspends the lower load block. The block may be an integral part of the trolley or suspended from the trolley. load hoist: a hoist drum and rope reeving system used for hoisting and lowering loads. load ratings: working load rating in pounds (kilograms) or tons established by the designer. luffing: the tilting of the cableway towers to achieve movement of the load block transverse to the center line of the cableway. luffing hoist: the hoist drum and rope reeving system used for luffing a cableway tower (mast) (see Fig. 19-0.2.2-4). manufacturer: a firm that produces fabricated or assem- bled segments of the cableway. The segments include, but are not limited to, towers, ropes, track cable, trolley, hoists, and load blocks. messenger line: an auxiliary rope suspended between the towers of the cableway to intermittently support electric power cables or other cables. The messenger line is nor- mally at the very top of the towers, above and clear of the button line. 2 minimum breaking force: the minimum load at which a new and unused wire rope will break when loaded to destruction in direct tension. operating ropes: wire ropes attached to a hoist for the purpose of pulling or lifting. overhaul: the action of pulling on a rope or set of falls to remove slack and unwind the rope from the hoist drum. pitch diameter: the diameter of a sheave or rope drum measured at the center line of the rope. qualified person: a person who, by possession of a recog- nized degree in an applicable field, or certificate of pro- fessional 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. rope: refers to wire rope unless otherwise specified. rotation-resistant rope: a wire rope consisting of a layer of strand laid in one direction covered by a layer of strand laid in the opposite direction. This has the effect of counteracting torque and reducing the tendency of the finished rope to rotate. shall: indicates that the rule is mandatory and must be followed. should: indicates that the rule is a recommendation, the advisability of which depends on the facts in each situation. slack carrier: a device that travels on the track cable to support the operating ropes when they are slack. tail tower (mast): a vertical support structure, guyed or counterweighted for stability, the purpose of which is to support the track cable and operating ropes. The tail tower is the tower located furthest from the load hoist and inhaul-outhaul hoist. thrust track: as support for a traveling tower, a rail(s) designed and constructed to withstand the horizontal and vertical resultant cableway forces perpendicular to the direction of tower travel. ton, long: 2,240 lb. ton, short: 2,000 lb. trackcable: the rope(s), spanningbetweenthe towers, that supports the trolley, load blocks, slack carriers, and load. trolley: see carriage. two-blocking: the condition in which the lower load block or hook assembly comes in contact with the upper load block.
