Custom elevator gauges alimak hek, a leading provider of vertical access equipment, needed a custom gauge for elevator wire rope and sheave inspections that included only a select range of sizes. The elevator industry has wasted a lot of time and money pursuing the false notion that the big problems with elevator rope are necessarily rope related. Williamsport, pa 17701 usa tel 5703265146 fax 5703274274. Some of the thinking has been that ropes are just not manufactured as well as they used to be. The low carbon wire used on traction grade wire ropes may provide better fatigue life than a higher carbon ehs wire. However, some fiber core ropes, when lightly loaded, may continue to display a degree of constructional stretch over a considerable portion of its life. One rope lay is the distance necessary to complete one turn of the strand around the diameter of the rope. Before bringing the rope into operation on the appliance, the user shall ensure that all the devices associated with the wire rope operation are set and functioning correctly. Pdf condition monitoring technologies for steel wire. A hand lamp with a special clamp which can be anchored with the lift rope may be used for inspection purposes. In addition to guidance on storage, handling, installation and maintenance, this document provides discard criteria for those running ropes which are subjected to multilayer spooling, where both.
A number of operations of the crane shall be carried out at ap proximately 10 % of the normal load to stabilize the wire rope. Therefore the wires and the ropes are galvanized unless otherwise demanded. This document is intended to assist wire rope inspectors and supervisors. Periodic inspections careful and detailed wire rope inspections, including diameter measurements, conducted by a person who has extensive knowledge, training, and experience in the inspection of wire ropes and related equipment. Product catalogs and informational brochures alps wire rope corporation is your favorite provider of general purpose, elevator, specialty crane, oilfield, marine and industrial cables. Bekaert elevator rope wire meets the standard en102642 specifications. Testing locale of tck wire rope nondestructive defectoscope for elevator. Construction the main components of wire rope are shown below.
The inspection is completed during production, thus leading the two processes of production and inspection combined into one, effectively improving the utilization rate of equipment. May 04, 2020 as an elevators means of propulsion is through its steel wire ropes or cables, asme a17. Guidelines for handling, installation and maintenance of wire ropes. Wire rope inspection and maintenance for your underhung hoist duration. Drako will of course continue to supply its customers with such solutions. Used for both lifting and stabilizing, bethlehem wire rope products are used in a wide variety of applications ranging from crane and elevator hoist ropes to bridge suspension and anchoring offshore platforms. A simple hemp rope lies at the center of one of the bestknown elevator stories elisha graves otis demonstration of his improved safety device at the 1854 crystal palace in new york city.
Wire rope inspection and maintenance for your underhung hoist. The fiber core dries up and cannot provide the 100 maynard st. Due to liftpacs compacted strands, its slightly flattened crown appearance should not be miscon. Stranded carbon steel wire ropes aramid fiber ropes noncircular elastomericcoated steel suspension members each part of the standard includes the material properties, design, testing, inspection, and replacement criteria for these means. This article reports the condition monitoring of a steel wire rope from a hoisting elevator with broken wires as a result of corrosive environment and fatigue. In elevator rope, rouging begins with a lack of core support. Galvanized wire ropes are available for special applications requiring additional levels of corrosion protection that cannot be fully accomplished through the lubrication of the wire rope. We stock large quantities of different varieties to be available for whatever type job you may have. Trained personnel should inspect wire rope on hoists. Use 8x19 seale traction steel ropes for most drum and counterweight ropes.
Draka elevator is the cable manufacturer and component distribution source to the vertical transportation industry. European and international elevator rope standards en 123855 2 also 4344 3 have coined the term rope grade to describe rope strength. The ends of the wire ropes attach to the platform at two or more hitch points. The above table is to be seen only as a guideline for rope inspection and the decision for rope discard.
Elevator wire rope inspection device luo yang wire rope. The quality of the lubricant in a wire rope is just as important as the quality of other rope components wire and core. Meanwhile, steel cores low the elongation of elevator wire ropes under same loads compared with fiber core. Suspension ropes, bigger in diameter than 16 mm 58 with 6 to 9 outer strands should have at least filler wire strands because of better flexibility. Wire rope inspection this fact sheet describes the inspection requirements of subpart cc cranes and derricks in construction, as specified in 29 cfr 1926. Any contact between the steel prongs of the fork lift. If synthetic rope may be subjected to damage such as from welding or cutting operations, a csaapproved 38 diameter wire rope lifeline may be used, provided a csa approved rope grab that is matched to the wire rope is also used. Checklist elevator or dumbwaiter inspection continuation unit id.
The inspection must consist of observation of wire ropes running and standing. Finite element analysis was conducted as a baseline to study guided wave propagation in wire ropes and plot dispersion curves. Along with the bethlehem elevator rope catalog, these bulletins will discuss, in further detail, those items and questions in which our customers are most interested. When an elevator hoist rope is in operation, each wire is in contact over its entire length with other wires, sheaves and drums. Prestretching some wire rope manufacturers promote prestretched rope at a premium price.
Exposure to the sun may damage or weaken synthetic lifelines. Water weights with over 25 years experience in the crane industry possess extensive knowledge of customer requirements. All of the following statements are true before starting an elevator, except. The procedures used, and the inspection frequency for each wire rope, will vary.
For a long time, due to the lack of reliable inspection equipment, wire rope safety. This second edition includes standards for three technologies for elevator suspension, namely. This is the core used in the wire rope slings provided on site. Wire ropeinspection birdcaging look for strands opening up in cagelike clusters. Module 10 final exam elevator preventive maintenance. Custom elevator gauges wire rope and sheave gauges. Wire rope installation guide prysmian group north america. This fact sheet describes the inspection requirements of subpart cc cranes and. In addition to inspecting wire rope itself, wire rope inspections should also include rope. This is especially true of elevator ropes because of their relatively long service lives. We offered them two options a stylized star gauge below and a custom set of a modified version of our stock wire rope and sheave gauges in anodized. Discard a wire rope if you find any of the following conditions. Wire rope replacement criteria prysmian group denmark as. For more information on wire rope stretch, contact draka elevator.
The elevator service bulletin series addresses the howtos of wire rope usage and is directed specifically to field service and maintenance personnel. However, any warranty, expressed or implied as to quality, performance or fitness for use of wire rope. In addition, the operator is responsible to complete visual inspections before each shift and before lifting a load. Wire rope products will break if abused, misused or overused. Maintenance, inspection, and testing of electric and. This information will also be useful in discussing future bulletins. The quality of the steel wires used for elevator cores has a substantial impact on the service life of the rope. Core protrusion replace rope when inner core starts poking through strands. Understanding problems of suspension means elevator. Six of these strands are formed around a central core to make a wire rope. Standard for elevator suspension, compensation and governor systems asme a17.
The first service bulletin provides a guideline for investigating elevator problems believed to be wire rope related. Elevator rope investigation transportation learning center. Elevator hoist rope with steel core iwrc steel core elevator hoist ropes are used where additional strength is required without increasing the diameter of the wire rope. Independent wire rope core effectively increases the metallic crosssection of elevator wire ropes and reduce tensile stress in individual wires. Consult industry recommendations and asme standards before using. In addition, the operator is responsible to complete visual inspections before each shift and. A brief history of elevator wire ropes, part one elevator.
How often should you inspect the brushes and the commutator of a dc motor. Passenger elevators and automatic operation freight elevators shall be provided. The wire ropes unless properly protected against oxidation tend to corrode fast and result in fatigue failures. Ced can provide you with the highest quality elevator wire rope in the industry. Laboratory testing has shown that standard gustav wolf natural fiber core rope sold by draka elevator exhibits comparable elongation to commonly used brands of. Mependent wire rope iwrc this is a separate wire rope. The wire hoist ropes were replaced 2 years later as recommended by accepted practices. Detection of broken wires in elevator wire ropes with.
Our elevator ropes come with a bright selfcolored finish and a lubricant designed to enhance the traction process. This research project tested the old wire hoist ropes to help verify the ndt testing results and physical strength of some rope sections. If the drum and sheave material of the existing elevator is softer than that required for traction steel, the use of iron. The first bulletin is intended to help in the basic terminology of the product. Give particular attention to where the wire rope passes over sheaves, such as in relation of the position of the wire rope over sheaves with the car at terminal landings. If there is anything in this manual that is not clear or which you. In order to reduce friction, wire ropes are well lubricated the lubrication requirement is dependent on the application of the wire rope. The safety of these elevators is an ongoing concern of reclamation. It defines the nominal tensile strengths of the outer and inner wires. The key to the success of bethlehem wire rope is the total commitment ww makes to the elevator industry. Draka elevator offers an everexpanding product range as well as supplier integration capabilities for the elevator industry. This is usually due to a lack of proper field lubrication. In running ropes wound on drums or passed over sheaves, 6 or more broken wires in one rope lay length. Service life determination of wire hoist ropes using.
Some information for this manual was taken with permission from the installation manual. Our global team of experts can also help customize the properties to your specific requirements. In steel wire ropes manufactured today, however, a great percentage of the metallic area cannot be visually inspected at all. When using nonrotating python compac 35, lift, or hoist constructions you may want to install a swivel between the rope end connection and the crane. Replacement, alteration or emergency repair complete all information in box 6 above and any items in box 8 that are changing as part of this project. However, in some highrise highspeed, most mrl and certain hydraulic applications, the use of steelreinforced natural fiber or full steel core iwrc ropes is becoming more common.
Normally, an elevator wire rope is composed of six, eight or nine strands with fc or iwrc as. Utilizing a common investigative procedure ensures the investigator certified inspector. Regular inspection permits the correct time for changing the rope to be. It can reduce energy consumption of the equipment used for wire rope detection, save energy and reduce consumption significantly. Please select one of our product brochures below for more information regarding each individual product. The procedures used, and the inspection frequency for each wire rope, will vary depending on operating conditions, anticipated rope life, and critical nature of service. Checklist and report for inspection of hydraulic elevators. Usually constructional stretch will cease at an early stage in the rope s life. Wire ropes we coss1srenr trm in of by usha martin iso 14001. An applicant must have five 5 years experience in wire rope manufacture, installation, maintenance andor inspection. Overview of tck elevator wire rope testers wire rope is a very important, but highrisk component of elevator equipment as it directly concerns the safety of passenger life and property. Rational field dressing along with other programs and conditions are required and recommended to obtain optimum hoist rope service life.
If the elevator system contains plastic sheaves, refer to german safety instructions for elevators sr kunststoffrollen, as ropes in such systems tend to show internal rather then external wire fractures. A brief history of elevator wire ropes, part one the humble hoisting rope occupies a unique place in the history of vertical transportation. Download an application form pdf get the free adobe acrobat reader 4. In the example above, each individual wire is arranged around a central wire to form a 7 wire strand. The glossary of terms relating to wire ropes are covered in the indian standard is 2363. The lubricating compounds in new wire rope have been rigorously selected, carefully and thoroughly applied, but will not endure and function the entire useful life of the elevator hoist rope.
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