wire rope failure causes pricelist

Safety should be the top concern of anyone employed in rigging. When working a job where so many lives could be cut short due to carelessness, there is no excuse for laziness or distraction. Rigs should be inspected thoroughly for any potential areas of breakage. It is important for employees to gain a fluency in the causes of wire rope damage and failures so they can spot areas of weakness and fix them before they grow into a dangerous problem.

Corrosion issues in wire ropes are one of the most difficult causes of wire rope damage and failures to identify, which is why it is one of the most dangerous. Wire rope failures due to corrosion are typically the result of poor lubrication. You can measure some amount of the lubrication by looking at the pitted surface of every individual rope, but this tells us little of the damage done to the core. Since it is difficult to identify the full spectrum of corrosion, this break stands apart as mysterious and deadly.

Abrasion-caused failure occurs when the wire rope has been damaged by irregular contact with hoist sheaves and drums or when it awkwardly rubs against an object such as shelving or a crane girder. It is also often caused by poorly grooved drums and sheaves. You know the wire ropes have experienced abrasions when the wire ends are worn thin.

When hoist ropes go through repetitive bending over sheaves, cracks will eventually develop in the individual wires. Sections of the wire that move over the sheaves develop the worst fatigue. The damage can often be seen by the naked eye. Whenever one broken wire appears due to fatigue, more will follow. Since these issues are essentially the result of wear and tear on the rope wire, they are considered a normal part of operating a crane.

Being fluent in safety measures is just as valuable to an employer as competency with cable rigging hardware. People who know how to spot areas for potential failures can keep themselves and their coworkers secure, which saves time, money, and even lives.

Wire rope isa type of cablewhich is made up of several strands of metal wirelaid or twisted into a braid or helix.Do you know how often your wire rope needs to be inspected? Wire rope inspections are vital to industries that use wire rope.

One of the most important purposes of carrying out wire rope inspections or testing is to oversee the process of depreciation in the wire rope. When any depreciation or deterioration is identified these wire ropes can cease to be used immediatelybefore it becomes a hazard. A great advantage of conducting these examinations is to analyse and identify if there is unexpected corrosion and destruction.

Commonly, there is a constant increase rate in the amount of wire rope breaks, during the lifespan of that wire rope. Wire ropes need to be inspected and tested as they have a limited life, like all consumable products. Early in the life of the wire rope (when it is starting to be used), the wires and strands of the rope settle into position and the breaking strength increases. Once it has hit its maximum, the breaking strength then decreases rapidly.

Wire rope inspections should only be carried out by highly trained professionals. There are 2 ways that these inspections are carried out on crane wire rope: Visual and Non-Destructive. Visual and no-destructive examinations are equally as important but a non-destructive wire rope test is a lot less frequent than a visual wire rope inspection. Destructive testing only takes place when specifically required by a company to find out what type of wire rope something is that has not been labelled and is not common practice in the general testing/inspections.

Visual inspection of wire ropeThe visual method is a simple yet effective method to check for external damage to a crane wire rope. Visually inspecting the entire length of rope is very important. The rope should be inspected 2 to 3 feet at a time and examined carefully at each stop. Whilst inspecting the wire rope it also cleaned with Lanotec and a wire brush.

Although tedious, it can determine many visual signs of wire rope damage, such as; kinks, bird caging, cutting, knots, flattening, crushing & heat damage (burn marks, discolouration of the metal). Wearing heavy duty gloves, an inspector will grab the rope and lightly move a rag slowly along the length of rope. Broken wires will often stick out (porcupine) and will therefore snag on the rag. Should the rag snag on a wire, the inspector should the stop and visually assess the rope condition. Broken wires do not always ‘porcupine’. Visual inspections should not be the only method relied on for inspecting crane wire ropes.

Due to the composition of a wire rope, the outer layer only represents approximately 40% of the metallic cross section of the rope and only approximately half of this is visible due to the strand twisting inside and out. That means you are only able to visually examine approximately 20% of the entire rope composition. You can only assume that the other 80% is in good condition.

Although the external 20% may look in good condition it may be concealing a great number of wire breaks and internal damage. Wire ropes with internal damage that have no signs of external damage can be extremely dangerous. This is why an internal wire rope inspection should also be completed. Internal deterioration is the primary cause of many rope failures, mainly due to corrosion and the normal progress of fatigue. Single-layer stranded ropes may be opened up slightly to allow an assessment of their internal condition, provided that they are at zero tension; though, some restrictions occur with large rope sizes. Permanent damage can be caused to multi-layer wire ropes if they are opened.

Internal inspection should always be carried out by a capable person. The method of inspection consists of firmly attaching two clamping jaws of appropriate size at a suitable distance apart to the rope. During the inspection of sections of rope adjacent to terminations, it is adequate to use a single clamping jaw, since the end anchorage system, or a bar suitably located through the end portion of the termination, may be used as the second clamp.

By the application of a force to the clamping jaws in the opposite direction to the rope lay, the outer strands separate and move away from the core. Care should be taken during the opening process to ensure that the clamping jaws do not slip about the outside of the rope. The strands should not be displaced excessively. When a limited opening is achieved, a small probe, such as a screwdriver, may be used to remove grease or debris that could obstruct observation of the interior of the rope. The crucial points that should be observed are as follows:

After inspection, a service dressing should be introduced into the opened part and the clamping jaws rotated with moderate force to ensure correct replacement of the strands around the core. After removal of the jaws, the outer surface of the rope should be greased. Since it is impossible to inspect the interior of the wire rope over the whole of its length, suitable sections shall be selected.

For wire ropes that wind onto a drum, or pass over pulleys or rollers, it is recommended that the lengths that engage the pulley grooves when the appliance is in a loaded condition be inspected. Those localised lengths in which shock forces are arrested (i.e., adjacent to drum and jib head pulleys) and those lengths that are particularly exposed to the weather for long periods should be inspected. Attention should be given to the length of rope close to its termination, and this is particularly important for fixed ropes, such as stays or pendants. This is where a visual inspection is complimented by a non-destructive test. .

our industrial experience as well as learning from steel sector and port sector, I have concluded that we must check wire rope once thoroughly in 24 hours as

The actual diameter of a wire rope is the diameter of a circumscribed circle that will enclose all the strands. It’s the largest cross-sectional measurement as shown here. You should make the measurement carefully with calipers.

The rope diameter should be measured on receipt for conformity with the specification. British Standard (B.S. 302:1987, standard steel wire rope, Part 1. Clause 5.1) allow for a tolerance of - 1% to 4 % of the nominal rope diameter.

The generally accepted method of measuring rope diameter for compliance with the standard is to use a caliper with jaws broad enough to cover not less than two adjacent stands. The measurement must be taken on a straight portion of rope at two points at least 1 meter apart. At each point two diameters at right angles should be measured. The average of the four measurement is the actual diameter.

After the rope has made the first few cycles under low load, the rope diameter should be measured at several points. The average value of all the measurements at each point must be recorded and will form the basis of comparison for all future measurements.

The measurements of the rope diameter an essential part of all inspections and examinations. It ensures the maximum diameter reduction does not exceed the recommended figure. As stated in 5.2 British standard 6570 recommends that a wire rope should be discarded when the diameter of the rope is reduced to 90% of the nominal diameter.

A comparison of the measured data with the recorded previous values can detect an abnormal rate of reduction in diameter. Coupled with assessment of previous rope examination data, the probable date of rope renewal can be predicted.

If we examine the cross-section of a six-stand wire rope, we will find that measuring the thickness of the rope over the crowns (Fig-a) will produce a higher value than measuring it over the valleys (Fig-b). The actual diameter of the rope is defined as the diameter of the circumscribing circle.

When using a conventional caliper, wire rope with an even number of outer strands (four-, six, eight-, and multi strand) ropes must be measured from crown to crown. The advantage of a proper wire rope caliper with measuring plates is that even if the measurement is carried out "incorrectly", adjacent crowns are always included, so that the actual diameter is determined at any section. (Fig-c)

Measuring the diameter of wire rope with an uneven number of outer strands (three, five, seven, or nine-strand ropes) is more complicated: a crown on the one side of the wire rope always has a valley as a counterpart on the other side of the wire rope. A conventional caliper, therefore, has to be applied diagonally to the axis of the rope, so that at any time a crown adjacent to a valley is covered. Again a wire rope caliper with measuring plate is definitely to be preferred as it always includes strands crowns.

In all cases during periodic examinations where the measurements are to be recorded, the rope should be measured as already described. Where the roundness is being checked to detect potential faults, two diameters, one at right angles to the other can be taken and noted in the records. The entry into the records might read rope diameter : 20.4/20.5mm.

After a rope has been fitted to the appliance, its length cannot be measured again accurately, with out a great deal of trouble. The purpose of measuring the length of lay is to detect any increase in the rope length which may have been caused by corrosion, core deterioration or rope rotation (unlaying). With n new rope the wire and strands should be allowed to settle into their permanent position. Six or seven lifting cycles with a light to medium load are recommended before measuring error, the measurement should be made over four lays and the length divided by four lays and the length divided by four to find the average lay length.

On eight strand ropes the eight, sixteen, twenty-four and thirty-second strands must be marked. Using a straight length of the rope and with the rope under no load, first mark any strand on the crown with a piece of chalk; this strand now become"" crown zero"". Excluding this strands, count the next eight strands and mark the eight strand with chalk. Exclude the eight strand and repeat the procedures further two times. The measured length between the outer chalk marks is then divided by four to give the lay length.

As a rough check on the overall accuracy of the chalk marking, the length of lay for eight strand ropes is approximately between 6.25 and 6.5 x the diameter of the rope e.g. using a lay length of 6.5 x rope diameter, four lay length of a 32mm diameter rope will be 32mm x 6.5 x 4=832mm.

An alternate method of measuring the rope lay is to secure the free end of the roll of adding machine paper to the rope with adhesive tape. The paper is rolled out over the rope and simultaneously the wax pencil is drawn over the paper, providing a clear print of the outer wires of the rope. The finished print can be field for comparison with later measurements.

A third method is to wrap typing carbon papers round the rope under the roll of paper. By rubbing along the paper with a piece of cardboard, the carbon marking on the underside of the paper can be confined to the tops of the strand crowns.

A wire rope consists of hundreds of components that must move and interact in unison to bend and support massive weights. Wire rope is often likened to a “machine,” and like any other machine, a good maintenance program will yield significantly longer life. Although the subject is much broader and longer than a short magazine article will allow, touching on some of the key points of wire rope maintenance is at least a good start.

A significant part of good wire rope maintenance is ensuring that the equipment it works with is also in good order. For the wire rope, that mainly means checking the sheaves. Sheaves must move freely to avoid undue abrasion and run true without wobbles to avoid vibrations that can fatigue the rope. Next, the groove must be suitable for the rope being used. It is recommended that the groove be 1 percent larger than the maximum rope diameter including its allowable tolerance. That means for a typical wire rope with 0 to +5 percent tolerance, the groove should be nominal rope diameter +6 percent.

Worn and undersized sheaves lead to deformations from forced twist while larger tolerances can lead to damage caused by a lack of support. Corrugation in the groove will both twist and wear the rope. Finally, inspection of rollers must be regarded to be as important as inspection of the sheaves. They also need to be free of corrugation, wear and stuck or worn bearings.

As a manufacturer and distributor of wire rope, wire rope slings, chain slings, synthetic slings and rigging hardware, we often see customers confused about what is involved in the inspection of their rigging equipment.Our goal is to help you understand what is required for your wire rope slings to meet ASME standards, which will help to ensure the safety of the users, help extend the service life of the slings and help reduce unnecessary equipment repair costs and loss of production due to equipment downtime.

As a starting point, the same work practices which apply to all “working” wire rope apply to wire rope which has been fabricated into a sling. A good working knowledge of wire rope design and construction is essential in conducting a wire rope sling inspection.There are two industry standards that exist to provide the end-user with guidelines for inspection and criteria that warrants removal from service: OSHA 1910.184 and ASME B30.9.

What are the basic inspection criteria for wire rope slings? The goal of a sling inspection is to evaluate remaining strength in a sling which has been used previously to determine if it is suitable for continued use. When inspecting wire rope slings, daily visual inspections are intended to detect serious damage or deterioration which would weaken the sling.

This inspection is usually performed by the person using the sling in a day-to-day job. The user should look for obvious things, such as broken wires, kinks, crushing, broken attachments, severe corrosion, etc. Any deterioration of the sling which could result in appreciable loss of original strength should be carefully noted and determination made on whether further use would constitute a safety hazard. ASME B30.9 standards specify that a wire rope sling shall be removed from service if any of the following conditions are present:

Broken Wires: For strand-laid grommets and single-part slings, ten randomly distributed broken wires in one rope lay, or five broken wires in one strand in one rope lay. For cable laid, cable laid grommets and multi-part slings, use the following:

Distortion: Kinking, crushing, birdcaging or other damage which distorts the rope structure. The main thing to look for is wires or strands that are pushed out of their original positions in the rope.

Corrosion: Severe corrosion of the rope or end attachments which has caused pitting or binding of wires should be cause for replacing the sling. Light surface rust does not substantially affect strength of a sling.

Unbalance: A very common cause of damage is the kink which results from pulling through a loop while using a sling, thus causing wires and strands to be deformed and pushed out of their original position. This unbalances the sling, reducing its strength.

Kinks: Are tightened loops with permanent strand distortion that result from improper handling when a rope is being installed or while in service. A kink happens when a loop is permitted to form and then is pulled down tight, causing permanent distortion of the strands. The damage is irreparable, and the sling must be taken out of service.

Doglegs: Are permanent bends caused by improper use or handling. If the dogleg is severe, the sling must be removed from service. If the dogleg is minor, (exhibiting no strand distortion) and cannot be observed when the sling is under tension, the area of the minor dogleg should be marked for observation and the sling can remain in service.

Among the most misunderstood aspects of crane rope maintenance is lubrication. When a wire rope is bent the individual wires and strands have to slide relative to each other and the rope itself glides within the sheave. Without proper lubrication, friction increases and the rope life is drastically reduced. Checking the lubrication and periodically applying a thin coating of maintenance lubricant is key to any maintenance program. As a rule of thumb, ropes require maintenancelubrication every six to 12 months.

When it comes to maintenance lubrication there are a few lesser-known things to keep in mind. First, the lubricant must be compatible with the original lubricant. Otherwise, through intermixing, the two products can form a totally different lubricant with different technical properties. Second, a lubricant designed only for wire rope is a must. Wire rope lubrication performs a very specific function with very specific properties which generally cannot be met by multi-use products such as a typical gear, chain and rope lubricant. Third, the lubricant must be able to penetrate inside of the strands to cover each component uniformly. A product that just sits on the outside does not help the wire rope life, plus it can inhibit inspection.

A common wear area of running ropes on construction cranes is at the drum. Since the rope is wound in multiple layers it is subjected to abrasion and crushing at crossover points between rope wraps and change in layers. To get optimal life from the rope it must be sufficiently tensioned on the drum to 5 to 10 percent of working load limit during installation. When a wire rope is sufficiently tensioned it tightens and gains lateral stability wires pushed out of position due to non-tensioned drum wraps, enabling it to resist crushing from the incoming loaded rope. When it is not tensioned it will crush much more easily. It is important to note that tensioning is not a one-time event. Over time, unused lower wraps and layers slowly lose this tension and therefore ropes need to be routinely tensioned as part of the crane maintenance program.

The new Super Reeve Connector Swivel Socket (SCS-SW) from RopeBlock is the result of further development of the company’s patented Super Reeve Connector Socket (SCS). The new design adds an integral swivel. The Super Reeve Connector Swivel Socket utilizes a poured button that achieves an efficiency of 100 percent of the wire rope breaking strength, RopeBlock said.

The shorter length optimizes the hoisting height. Integrating a swivel increases safety as the torsional forces are reduced in comparison to situations where only a socket is used, the company said. RopeBlock engineers have designed the SCS-SW as a universal product that can be relatively easily adapted to all types of cranes. The SCS-SW is available for wire rope sizes from 7/16 inches to 2 1/8 inches (11mm - 54mm).

Another method to extend the lifetime of wire rope is by cutting a length equal to 1-1/4 drum wraps from the drum end to move the wear points. For this method to be effective it must be done at intervals that occur prior to these sections showing more wear than the rest of the rope. Three or more times over the rope’s lifetime is recommended.

For tower cranes the problem is usually compounded. The crane starts at a base height and climbs during the job leaving lots of unused rope in the lower layers on the drum, not to be used until the crane is climbed to its final working height.

These lower layers at the start of the job cannot be practically re-tensioned or shortened until the rope climbs high enough to fully spool the rope off. Unfortunately, by the time the rope at these lower layers is needed it may already be damaged. The solution is to plan to use a different length of rope for each stage of the job. This ensures that there aren’t any unused, low tension layers becoming damaged before seeing any useful life and in most cases the ropes can be used again at the next job.

WireCo WorldGroup has introduced a new product that will replace Apex for extend and retract assemblies on cranes. Following an analysis conducted by its technical and engineering specialists, Wireco WorldGroup is now offering Betalift SP.

“Betalift SP can be directly substituted into the application the Apex product is currently used, with equal breaking strength and even more benefits to our customers,” said WireCo WorldGroup. “Manufactured to the industry’s highest standards, Betalift SP is constructed with drawn galvanized wires that provide excellent corrosion resistance. In addition, extensive testing has shown Betalift SP provides 25 to 50 percent improvement in fatigue life.”

Rope Services Direct supplies a variety of anti-spin non rotating wire rope (also called rotation resistant wire-rope). All standard rope wirehas a tendency to develop torque and therefore prone to rotation, whereas non-rotating wire ropes are designed so that the wire-rope outer rotational force naturally counteracts the inner strands rotational force. This is in the event that a rope is subjected to a load.

Rope elongation and rotation occurs on standard ropes when loaded, which can therefore spin the load, quite possibly out of control, which can be dangerous. When the rope rotates in this way the strands will begin to unravel. This causes the rope to lose strength and will undoubtedly fail, which could be catastrophic. It is for these reasons that non rotating wire rope is commonly used for many types of lifting applications including main hoist rope, whip rope,crane rope, off-shore and deck rope and more.

Non rotating wire rope or rotation resistant wire rope has a different construction to standard. as wires and strands are not laid in the same direction like they would be on standard rope. Inner and outer strands of wires are laid in opposite directions. For example the inner may be constructed in left hand lay whilst the outer layer is in right hand lay. The nature of this construction means that torsional forces on the inner and outer wires/strands will counteract each other and therefore minimising the risk of unraveling.

It is worth noting that the number of strand layers will have an effect of the resistance of rotation. A 2 layer rope has less resistance than a 3 layer rope. Therefore the more layers the rope has the greater rotation resistance it will have.

These types of ropes can be classified as spin resistant, rotation resistant or non rotation resistant. Classed on the basis of the number of rotations a certain length of rope does when a force of 20% of the MBF is applied; with 1 turn or less the rope will be classified as non rotating; with rotations between 1 & 4 the rope is classed as low rotation and for rotations between 4 & 10 the rope will be classified as spin resistant, any higher and the rope is NOT rotation resistant at all.

Correct usage and care with handling will prolong the working life. This is due to the friction on the inner wires caused by the strand crossover’s which will eventually cause the inner wires to break up. This is more apparent on non rotating wire rope with two layers. Ropes with 3 or more strand layers will distribute the radial pressures more evenly. Which will reduce friction and stress on the inner wires.

Regular,thorough inspectionsof non rotating rope are essential due to the fact that it is the inner strands that often break first and broken internal wires often go unnoticed as they are difficult to see.Rope Services Direct offer inspectionson all rope with certification issued on completion.

Holding both ends of the rope will prevent unraveling. Correctly fitted terminations will help to prevent damage. Kinking and unraveling may occur and they can also have an effect on the rotational balance if not fitted correctly.

There are a variety of cables and wires that are used for various purposes. They can either be hidden underground or pass overhead. Crane Cable is one such cable wire rope made out of several strands of metal wires that are twisted together into a helix form to make them into a single rope. Initially, wrought iron was used to make these Crane Cables however, these days steel is the primary material used. Apart from this high carbon steel and galvanized steel are also used in manufacturing these cables. Dents or flaws in the ordinary link chain can lead to severe failure whereas, damage in these EOT Crane Cablecan be easily covered up. Ther are ideally used for lifting elevators, in the transmission of mechanical power, and in cranes.

Crane Lifting Cables are resistant to corrosion and have excellent ductility for optimal fatigue. They have a high breaking strength compared to steel crane wire rope. The radially elastic rope structure absorbs the dynamic force thus giving it high impact resistance. Crane Cable Wires are said to be cost-effective as a strong and durable structure helps in reducing maintenance costs and downtime. They can be coated with bright phosphate or galvanized depending upon the customers’ requirements.

Crane Electrical Cable is available in rotating, rotation, compact, or non-compact structures. Most of the wire ropes have the tendency of developing torque and are thus prone to rotation. However, non-rotation wires are designed in a way that their outer rotation naturally counteracts the inner strands rotation. Crane Hoist Cable can be used in tower crane ropes or offshore crane ropes.

Overhead Crane Cable reel should be capable of winding it automatically. The drive torque of the crane cable should not be less than the max winding torque of the winding crane cable. The cable conductor should be as small as possible when the Crane Rope laying acts on the traction force.

The Crane Wire Rope does not have a reinforcement core, the maximum tension allowed on the copper conductor cross-section is 20N/mm2. We at Bhuwal Insulation Cable Pvt. Ltd. not only provide you the best quality Tower Crane Cable but also the parts required to assemble them. Our long-standing reputation in providing the best quality product at a competent price has made us one of the leading Crane Cable manufacturers in India.

Cables or cords are the wire ropes which have diameters smaller than 3/8 inches, While wire ropes have diameters greater than 3/8 inches. if there are two or more wire concentrically laid then it is known as strand

Warrington: Two layers of wires around a center with one diameter of wire in the inner layer and two diameters of wire alternating large and small in the outer later

6 by 19 is a type of wire rope which can withstand fatigue resistance, abrasion and prevents crushing on drums. it is available in diatmeter range of 3mm to 6 mm. While 7 by 19 are wire rope which has diameters ranging between 3 mm to 16 mm which can be use in different applications.

What are cranes wire used for? Crane wire is used in the cables of our customers, to manufacture cranes wire for gains. These types of crane wire are used to manufacture cranes wire for the cables of various types. The wire is usually galvanized or polypropylene crane wire which is used for 3 and 4 feet crane wire is needed for this galvanized wire. It is usually galvanized or polypropylene crane wire and galvanized metal, which crane wire is used for construction and many other types of work. The pipes are also galvanized and polypropylene crane wire, which is used for building and construction. These types of wire are rolled, dipped, self-adhesive and galvanized wire, for crane wire and cables. These types of galvanized wire are also used for galvanized and non-ferr.

Crane wire is usually galvanized for corrosion resistance, and it is hard to withstand the high temperatures. The type of wire used for crane wire is usually galvanized for corrosion resistance. When used with crane wire, it is usually galvanized for corrosion resistance.

Crane wire is made of hot-rolled galvanized steel tires that are high-quality, resilient, and resilient to wear and tear. Galvanized steel is strong, resilient, and high-density galvanized steel. Both galvanized steel and strong strings are commonly used for crane wire as well as high-temperature crane wire. Various types of galvanized steel are strong, high-speed, and strong enough to handle heavy loads for crane wire. Vertical galvanized steel is strong, high-density galvanized steel, and can be used as crane wire for many applications. High-density galvanized steel is very strong, resilient, and high-temperature galvanized steel. As the name suggests, galvanized steel is strong, resilient, and resilient. galvanized steel has strong str.

Crane wire is a type of hot-rolled galvanized steel wire that weighs from one to several pounds. Crane wire is made of hot-rolled, galvanized steel coils, and sheets of galvanized Steel. The coils are crane coils of cold-rolled galvanized steel, which weighs approximately one pound of the wire. Crane wire is coated with high-strength galvanized steel coils, etc. , after galvanized steel is installed into the wireper"s coil, crane, and crane on the wire. Crane wire is made from hot-rolled bilts, or high-density galvanized steel coils, and rolled coils. Crane wire is coated of high-strength, galvanized steel, and coils. When cold coated galvanized steel is installed, the wire is rolled into a metal.

Crane Wire is a wire of mesh used for fence cranes made of steel wire. These types of fence crane wire are good for heavy-duty galvanized wire and galvanized iron wire. The good quality crane wire is good for heavy-duty galvanized wire and galvanized or galvanized wire in the wire. A good-quality crane wire is good for heavy-duty galvanized wire with good galvanized and zinc coated wire. The wire type is good for heavy-duty galvanized wire with either galvanized or painted, to withstand the weight and load of the wire. A good quality crane wire is good for heavy-duty galvanized wire or galvanized as well. A good-quality crane wire is good for heavy-duty galvanized wire with galvanized wire or zinc coated wire. A good quality crane wire is used for p.

Unfortunately, many phone calls into ITI Field Services begins this way, “We have had an incident with a wire rope and we believe the rope failed. How do we determine the cause of failure?”

Fortunately, the calls come in because wire rope users want to determine cause of failure in an effort to improve their crane, rigging and lifting activities.

A wire rope distributor received a hoist rope and sockets from a rubber-tired gantry. The rope and sockets were returned by the customer who believed the rope and sockets failed. The distributor hired ITI Field Services to conduct an analysis on the rope and sockets to determine the cause of the failure and to produce written documentation.

Based on the findings of the examination, fatigue-type breaks in the wires indicated that the wire rope lost significant strength due to vibration. There was no indication that the rope was overloaded. The poured sockets showed no evidence of abnormalities in the pouring method, wire zinc bonding length or the materials used in the speltering process. The conclusion of the inspection is that rope failed due to fatigue.

Wire rope examination is just one of the many services that is offered by ITI Field Services. ITI has some of the most highly-regarded subject-matter experts in the crane and rigging industry with experience in performance evaluations, litigation, accident investigations, manual development and critical lift planning reviews.