overhead crane wire rope inspection price

This safety saying from the early 1900s applies well to the lifting and material-handling industries. And that is especially true for the inspection of specialty ropes used in overhead lifts on your cranes.

Third-party crane rope inspections are a fairly new concept in the lifting and rigging industry. It’s a streamlined process where you will get some extra documentation and protection before your crane is put into service.

The lifting and rigging industry is dynamic, and price increases continue impacting vendors and customers alike. Because of that, it’s important for you to be as precise with your expenditures as possible, while still making sure everything with your crane and its ropes are in working order before it actually goes to a jobsite.

When the crane returns from the field, the rope may no longer be in good working order and should be inspected before going back into service on another job. This would be the time to bring in a third-party inspector to examine your rope, especially if your operators are unable to determine whether the rope should stay in service or be discarded.

If this process isn’t completed, and there is enough damage to meet removal from service criteria, the ropes must be replaced in the field. Replacing crane ropes in the field is much more complicated and costly, especially if a hot shot is required. In the crane ropes industry, a “hot shot” is an expedited order that is needed because an inactive crane is costing the renter thousands of dollars an hour in downtime.

First, you must find a company that has the correct rope for your crane. Then, there’s the matter of shipping and delivery, as well as finding an experienced technician who can remove the old crane rope and install new ones.

The moment a technician arrives on location, they’re going to set up the equipment. Then, they’re going to conduct and discuss the Job Safety Analysis (JSA) with everyone involved in the inspection.

Mazzella technicians will dictate how the inspection is going to occur, and explain whether we need access to the equipment all day, as well as provide a rough timeframe for completion of the process.

We require each technician to take between 20 and 50 pictures per inspection for documentation purposes. Everything we do in the field is going to be documented on a piece of paper and photographically. The report and photos will be given to you at the end of the inspection.

During the inspection, the technicians are tasked with conducting specific measurements. If they find damage, they’re noting damage in their report. They count the number of wire breaks and note other potential damage that was found. When they pull off the rope, they take rope diameter measurements every 500’ to make sure there is not less visible damage to the rope.

You do need to have a crane operator on site to help with the inspection. Also, if the crane requires a mechanic to reset some of the codes and indicators, then they need to be on location, too.

A properly trained inspection technician should be able to handle the majority of the inspection himself. However, with certain cranes, you really need to be on-site to support the technician. Additionally, you should designate an on-site person to handle the paperwork.

During a rope inspection, our technicians will communicate with the decision-maker throughout the entire process so there are no surprises at the end. If we do find broken wires, we let you know right away. If in the middle of a rope inspection, we find broken wires, we’re going to let you know we found damage.

First and foremost, the distance required for a single technician, or multiple technicians, to travel to your location will have an impact on the cost. Mazzella has an hourly rate, and the charge is door to door from the time we leave the shop to the time we get back. If it’s an overnight stay, there will be additional charges to cover hotel and food costs while the technician(s) are working on your crane(s).

A lot of the cost will be dependent on the location of the crane versus where our technician(s) and equipment are located at the time you need the inspection. When you consider the price of the rope, investing in an inspection could save you a significant amount of money from potential downtime after the crane is in the field.

The hourly rate for Mazzella crane ropes inspectors is between $195 and $250. That’s our technician’s rate from the time they leave the shop until they get back after the inspection is complete.

The overall length and time of the inspection also affects the cost. Weekends and holidays will come with higher rates for the technician’s services. Also, if multiple technicians are needed to service multiple cranes, that will add to the overall cost of an inspection.

Mazzella is a one-stop-shop for high-performance crane ropes, or any kind of specialty ropes. Also, we have fittings and sockets that we can install, and a large inventory of ropes in stock that allow us to help get you back up and running as quickly as possible.

We offer a new rope replacement off the same truck and trailer that we’re doing the inspection from. If it’s a rope replacement, that’s something we can typically get on a truck and on the way the same day if the order is placed by 2 p.m. EST. If that happens, we can get the rope on the road and conduct the install the next day.

We have one of the largest crane ropes inventories in the United States…ready for immediate delivery! We provide wire rope assemblies, and manufacture bridge cables, crane cables, steel mill cables, and thousands of OEM assemblies:In sizes from ¼” to 3” diameter and 9mm to 52mm diameter

As a Safety, Maintenance, or Operations Manager, overhead crane inspectionshould be top of mind for you to stay in compliance with inspection standards laid out by sanctioning bodies like OSHA, ASME/ANSI, and CMAA.

This can seem daunting—especially with all of the other work that you have on your plate—and it can be confusing to understand how often your overhead cranes need to be inspected, and how much that will add to your budget each year.

As a company that employs over 100 certified and experienced crane and hoist inspectors, one of the most frequently asked questions that we get from our customers (often, on a daily basis), is “how much will my crane inspection cost?”

The answer itself can be complex as there are many factors that can affect the cost of an overhead crane and hoist inspection. We’ll dive deeper into these factors below to help you better understand how much an overhead crane inspection will cost you.

The most important factor in determining the cost of an overhead crane inspection is the type of crane or cranes that need to be inspected. There are many different kinds of cranes, and each one has its own unique inspection criteria and requirements, and can take varying lengths of time to complete the inspection process.

As the duty cycle increases, the cost of the inspection will increase due to the components and the time required to complete a thorough inspection. Think about all of the moving parts required to operate an overhead double girder top running electrified crane. Now, compare that to a basic jib crane or mechanical workstation crane with no electronics, and a basic support structure.Number of cranes – The total number of cranes on-site will play a major factor in the cost of the crane inspection. The more cranes there are on site, the longer the inspector(s) will have to remain at your facility to complete the job.

Components – A double girder or single girder overhead crane is going to have significantly more parts than a basic jib or workstation crane. Things like electrification systems, braking systems, radio remote controls/pendants, variable speed controls, etc. have their own inspection requirements and are more complex pieces than what you would find on a jib or workstation crane.

Environment and accessibility of cranes – What type of environment is the crane in? Hazardous or chemical environments, and accessibility considerations like maneuvering lifts to access the crane equipment, have a direct relationship on the cost of the inspection.

A major factor in determining the cost of an overhead crane inspection is the frequency, or type of crane inspection, that is being performed. Knowing how often your overhead cranes need to be inspected is one of the first steps in determining the criteria for inspection and how often it will be performed. Developing an inspection program that will meet compliance requirements for OSHA, ASME, and CMAA standards will help to keep you compliant for overhead crane inspection—scheduling only one annual inspection will not.

Inspection frequency is based on crane service, environmental factors, and application factors according to OSHA 1910.179:“Inspection procedure for cranes in regular service is divided into two general classifications based upon the intervals at which inspection should be performed. The intervals, in turn, are dependent upon the nature of the critical components of the crane and the degree of their exposure to wear, deterioration, or malfunction. The two general classifications are herein designated as ‘frequent’ and ‘periodic’ with respective intervals between inspections…”

The section highlighted in bold above is the most critical piece of this statement. Specifically, “the degree of their exposure to wear, deterioration, or malfunction.” The degree of exposure of the crane’s critical components is determined by the duty cycle of the crane, or crane service classification, as determined by CMAA:Class A (Standby or Infrequent Service) – This equipment, including installation and maintenance cranes, usually operates at slow speeds for precise handling with long idle periods between lifts. Maximum capacity lifts are sometimes required.

Class B (Light Service) – This class of equipment includes cranes in repair shops, light assembly operations, service buildings, light warehousing, etc. and service requirements are light and the speed is slow. Loads vary from no load to occasional full-rated loads with 2-5 lifts per hour, averaging 10 feet per lift.

Class C (Moderate Service) – In terms of numbers, most cranes are built to meet Class C service requirements, including cranes used in machine shops or paper mill machine rooms. These types of cranes will handle loads that average 50% of the rated capacity with 5-10 lifts per hour, averaging 15 feet per lift.

Class D (Heavy Service)– Typical examples of these types of crane include ones used in heavy machine shops, foundries, fabricating plants, steel warehouses, container yards, lumber mills, etc. These types of cranes constantly handle loads approaching 50% of the rated capacity. High speeds are desirable for this type of service with 10-20 lifts per hour, averaging 15 feet, with not 65% of the lifts at rated capacity.

Class E (Severe Service) – This equipment is a top riding bridge or gantry type multiple girder electric overhead crane. Applications include magnet, bucket, or magnet/bucket combination and are most commonly found at scrap yards, cement mills, lumber mills, fertilizer plants, container yards, etc. This service class requires a crane capable of handling loads approaching the rated capacity throughout its life with 20 or more lifts per hour at or near rated capacity.

Class F (Continuous Severe Service) – This equipment is a top riding bridge or gantry type multiple girder electric overhead crane. Applications include custom-designed specialty cranes essential to performing critical work task affecting the total production facility. These cranes must be capable of handling loads approaching rated capacity continuously under severe service conditions throughout its life.

So, now that we’ve identified the different types of overhead crane service classifications, we can lay out guidelines for inspection frequency. A crane will go through two types of inspections during the course of a year: Frequent and Periodic. Let’s identify what these types of inspections are, and how often they need to occur:

Frequent inspection – A frequent inspection is a visual and operational inspection performed monthly or as often as daily. Inspection frequency is based on service, environmental, and application factors, as designated by a qualified person.

Periodic inspection – A periodic inspection is a detailed visual and operational inspection where individual components are examined to determine their condition. Inspection frequency can be quarterly to annually and is based on service, environmental, and application factors, as designated by a qualified person.

There are a few other factors that can affect the cost of a crane inspection. Things like equipment, downtime or wait time, training, and environment can all affect the overall cost of a crane inspection.

Equipment– Will the inspector need to provide their own lift or is there equipment on-site that will allow the inspector to access the cranes? If a technician needs to bring their own lift, it can add up to an hour onto the service time to complete the unloading and loading of the lift.

Are there provisions in place (anchors, guardrails, etc.) for fall protection? Is the equipment easy to reach? Accessibility of the crane or unit can affect the time it takes to complete the inspection.

Training – Is additional safety training required for an inspector to come on your job site or access your facility? Additional training will add on to the number of hours required for the inspection and increase costs. It’s best to let your crane service provider know about this upfront so they can build it into their quote.

Every crane service provider has their own set prices for overhead crane inspection, but you should expect to ask for their hourly rate, plus an estimate of the total number of hours required to complete the crane inspection process at your facility.

We’ve seen ranges starting around $65 per hour all the way up to $125 an hour for crane inspection services. However, many companies quote between the ranges of $75-$100 per hour on average.

One thing to make note of when reviewing bids from crane service providers: If any bid stands out as abnormally low compared to a comparable bid that you received from another vendor, that company may be discounting their inspection quote to get you to sign up for a contract or service agreement. Once you’re on-board as a customer under contract, they may make up for their low bid by marking up their rates for any service and repairs/replacement parts needed down the road.

Remember, when a crane service provider is estimating the total number of hours they expect to complete a crane inspection, they will need the following information to put a well-informed estimate together:Type of crane and capacity of the crane that is being inspected

Other factors, including special training required to come on site, any special equipment needed, operating environment, and accessibility to the crane or equipment

At Mazzella FHS, our field personnel are experienced and certified to help you with in-plant crane inspection needs, field inspections, lifting and rigging inspections, and hoist inspections. We’ll work hand-in-hand with your company to help develop an overhead crane inspection program that meets your company’s unique needs and complies with OSHA and CMAA requirements.

Consultation on inspection reports and actionable items regarding any hazards, mechanical issues, or opportunities for improvement to help keep your employees safe, reduce downtime, and extend the life of your equipment.

Wire ropes undergo constant stress and wear through daily use. So, wire rope requires monthly inspection in accordance with this section to reduce the risk of failure and potential resulting injury or property damage. In addition, this section covers criteria to use in determining when to replace rope, and requires inspection of rope on equipment that has been idle for a month or more, before the rope and equipment can be returned to service.

A thorough inspection of all ropes shall be made at least once a month and a certification record which included the date of inspection, the signature of the person who performed the inspection and an identifier for the ropes which were inspected shall be kept on file where readily available to appointed personnel. Any deterioration, resulting in appreciable loss of original strength, shall be carefully observed and determination made as to whether further use of the rope would constitute a safety hazard. Some of the conditions that could result in an appreciable loss of strength are the following:

All rope which has been idle for a period of a month or more due to shutdown or storage of a crane on which it is installed shall be given a thorough inspection before it is used. This inspection shall be for all types of deterioration and shall be performed by an appointed person whose approval shall be required for further use of the rope. A certification record shall be available for inspection which includes the date of inspection, the signature of the person who performed the inspection and an identifier for the rope which was inspected.

Wear and damage to wire rope can’t always be seen on the surface. Konecranes RopeQ Magnetic Rope Inspection pairs visual inspection with non-destructive testing to detect internal broken wires that may escape detection through traditional inspection methods.

Any wire rope in use should be inspected on a regular basis. You have too much at stake in lives and equipment to ignore thorough examination of the rope at prescribed intervals.

The purpose of inspection is to accurately estimate the service life and strength remaining in a rope so that maximum service can be had within the limits of safety. Results of the inspection should be recorded to provide a history of rope performance on a particular job.

On most jobs wire rope must be replaced before there is any risk of failure. A rope broken in service can destroy machinery and curtail production. It can also kill.

Because of the great responsibility involved in ensuring safe rigging on equipment, the person assigned to inspect should know wire rope and its operation thoroughly. Inspections should be made periodically and before each use, and the results recorded.

When inspecting the rope, the condition of the drum, sheaves, guards, cable clamps and other end fittings should be noted. The condition of these parts affects rope wear: any defects detected should be repaired.

To ensure rope soundness between inspections, all workers should participate. The operator can be most helpful by watching the ropes under his control. If any accident involving the ropes occurs, the operator should immediately shut down his equipment and report the accident to his supervisor. The equipment should be inspected before resuming operation.

The Occupational Safety and Health Act has made periodic inspection mandatory for most wire rope applications. If you need help locating the regulations that apply to your application, please give our rigging experts a call.

A competent person must begin a visual inspection prior to each shift the equipment is used, which must be completed before or during that shift. The inspection must consist of observation of wire ropes (running and standing) that are likely to be in use during the shift for apparent deficiencies, including those listed in paragraph (a)(2) of this section. Untwisting (opening) of wire rope or booming down is not required as part of this inspection.

Significant distortion of the wire rope structure such as kinking, crushing, unstranding, birdcaging, signs of core failure or steel core protrusion between the outer strands.

In running wire ropes: Six randomly distributed broken wires in one rope lay or three broken wires in one strand in one rope lay, where a rope lay is the length along the rope in which one strand makes a complete revolution around the rope.

In rotation resistant ropes: Two randomly distributed broken wires in six rope diameters or four randomly distributed broken wires in 30 rope diameters.

In pendants or standing wire ropes: More than two broken wires in one rope lay located in rope beyond end connections and/or more than one broken wire in a rope lay located at an end connection.

If a deficiency in Category I (see paragraph (a)(2)(i) of this section) is identified, an immediate determination must be made by the competent person as to whether the deficiency constitutes a safety hazard. If the deficiency is determined to constitute a safety hazard, operations involving use of the wire rope in question must be prohibited until:

If the deficiency is localized, the problem is corrected by severing the wire rope in two; the undamaged portion may continue to be used. Joining lengths of wire rope by splicing is prohibited. If a rope is shortened under this paragraph, the employer must ensure that the drum will still have two wraps of wire when the load and/or boom is in its lowest position.

If a deficiency in Category II (see paragraph (a)(2)(ii) of this section) is identified, operations involving use of the wire rope in question must be prohibited until:

The employer complies with the wire rope manufacturer"s established criterion for removal from service or a different criterion that the wire rope manufacturer has approved in writing for that specific wire rope (see § 1926.1417),

If the deficiency is localized, the problem is corrected by severing the wire rope in two; the undamaged portion may continue to be used. Joining lengths of wire rope by splicing is prohibited. If a rope is shortened under this paragraph, the employer must ensure that the drum will still have two wraps of wire when the load and/or boom is in its lowest position.

If the deficiency (other than power line contact) is localized, the problem is corrected by severing the wire rope in two; the undamaged portion may continue to be used. Joining lengths of wire rope by splicing is prohibited. Repair of wire rope that contacted an energized power line is also prohibited. If a rope is shortened under this paragraph, the employer must ensure that the drum will still have two wraps of wire when the load and/or boom is in its lowest position.

Where a wire rope is required to be removed from service under this section, either the equipment (as a whole) or the hoist with that wire rope must be tagged-out, in accordance with § 1926.1417(f)(1), until the wire rope is repaired or replaced.

The inspection must include any deficiencies that the qualified person who conducts the annual inspection determines under paragraph (c)(3)(ii) of this section must be monitored.

Wire ropes on equipment must not be used until an inspection under this paragraph demonstrates that no corrective action under paragraph (a)(4) of this section is required.

At least every 12 months, wire ropes in use on equipment must be inspected by a qualified person in accordance with paragraph (a) of this section (shift inspection).

The inspection must be complete and thorough, covering the surface of the entire length of the wire ropes, with particular attention given to all of the following:

Exception: In the event an inspection under paragraph (c)(2) of this section is not feasible due to existing set-up and configuration of the equipment (such as where an assist crane is needed) or due to site conditions (such as a dense urban setting), such inspections must be conducted as soon as it becomes feasible, but no longer than an additional 6 months for running ropes and, for standing ropes, at the time of disassembly.

If the deficiency is localized, the problem is corrected by severing the wire rope in two; the undamaged portion may continue to be used. Joining lengths of wire rope by splicing is prohibited. If a rope is shortened under this paragraph, the employer must ensure that the drum will still have two wraps of wire when the load and/or boom is in its lowest position.

If the qualified person determines that, though not presently a safety hazard, the deficiency needs to be monitored, the employer must ensure that the deficiency is checked in the monthly inspections.

All documents produced under this section must be available, during the applicable document retention period, to all persons who conduct inspections under this section.

Wire ropes are complex machines with a great many moving parts. They require attention, skilled operators, careful maintenance, inspection and lubrication.

In spite of their vital importance, wire ropes are frequently treated as and considered low-tech commodities. Failures are frequently accepted as “inevitable.”

With the appropriate inspections, wire rope failures can be predicted, and expenses and losses reduced. Consider that the price tag of rope failures can easily be in the seven or even eight digit range, and the cost of an inspection is marginal.

Much more dependable than visual inspections, magnetic rope testing (MRT) is a reliable non-destructive evaluation/examination (NDE) procedure used for the in-service inspection of wire ropes. NDE methods allow the detection and evaluation of external as well as internal rope deterioration. This allows the inspection of a rope’s entire cross-section to the core. MRT drastically increases wire rope safety. At the same time, it promises significant annual savings.

Ropes usually degrade internally with no visible indications. Internal deterioration modes include inter-strand nicking that will eventually develop into clusters of internal broken wires and corrosion including corrosion pitting.

External deterioration includes winding-on-drum damage. Urgently needed, suitable inspection equipment and procedures are now available – especially for the quantitative characterization of internal rope deterioration.

Removal criteria for wire rope, wire rope slings, synthetic web/round slings, chain slings, rigging hardware, and below-the-hook lifting devices is the focus here. Personnel qualification is available.

ITI endorses the national certification program offered by the National Commission for the Certification of Crane Operators (NCCCO) and provides training to prepare candidates for NCCCO written and practical exams. Exam administration with Certified Practical Examiners (ITI Instructors) is also offered.

Designed for lift planners, crane and rigging managers, and other non-engineers who conduct lift planning activities, ITI’s Fundamentals of Rigging Engineering courses are LEEA accredited and approved by ASME.

ITI offers signalperson training for personnel who use hand and voice signals in crane operations. Qualification and Certification Exams through NCCCO are offered.

Non-destructive wire rope inspection involves determining the condition of wire rope still in service to ensure that it is safe for use. Every steel wire rope, which is subject to corrosion, abrasion, and fatigue, will fail one day if it is not discarded in time. Steel wire rope flaw detectors enable accurate measurement of loss of metallic area (LMA) and detection of outer and inner localized flaws (LF), such as broken wires, strands, pitting corrosion. Our wire rope test and inspection equipment is suitable for underground and surface mining, cranes and heavy lifting onshore and offshore, cable ways, cable bridges, elevators, guy ropes of flare stacks and masts, overhead transmission lines, etc.

AOC services bridge cranes, overhead cranes, gantry cranes, jib cranes, monorails, hoists, lifts, material handling equipment, patented track systems, enclosed track systems and other heavy duty moving equipment and machinery.

Our core services include inspections, testing, regulatory compliance maintenance, service and repairs, major upgrades, modifications, and product sales including complete turnkey systems.

Technicians are extensively trained in-house and fully prepared before they reach your job-site. As your wire rope service sales vendor, we"ll complete the job professionally while making sure the work is done promptly and meets or exceeds all regulatory requirements.

OSHA requires annual inspections. They also require equipment be maintained on a scheduled basis, complete with dated records, according to the equipment duty cycle and the manufacturers requirements. As your wire rope service sales provider, we ensure that you meet OSHA requirements.

Quarterly inspections prevent small problems from becoming large. Unexpected down time costs money. If you take two identical cranes with the same age running the same duty cycle, the annually maintained crane will almost always cost more over time due to higher operating costs, lost productivity from downtime and increased repair bills.

Two identical cranes, same age and running the same duty cycle. The annually maintained crane will almost always cost more over time due to higher operating costs, lost productivity from downtime and increased repair bills.

Many manufacturers go beyond the minimum standards in the design and operation of their equipment. As your wire rope service sales supplier, we can help you understand the difference between minimum standards, operational and compliance.

Contact Advanced Overhead Crane Services for your wire rope service sales sourcing requirements to save money, avoid unexpected down time and unnecessary risks.

The crane operator and inspector must start with a meeting to discuss each person’s role and how the inspection will be preformed—it helps if the crane operator knows what the inspector will be doing.

The inspector must wear protective gloves that allow for feel of the rope—only half the rope can be seen at any given time, so feel is critical to the inspection.

The crane operator NEVER spools rope off the drum until they clearly understand the inspector’s instruction to do so. A suggested method would be having the operator adjust the rear facing mirror to see the inspector—and the drum does not move on verbal command alone, but they must see the inspector’s hands held up and away from the drum.

The operator should understand that some areas of the rope inspection take longer than others—at times there may be longer or shorter delays between spooling commands.

A thorough inspection of all ropes shall be made at least once a month and a certification record which includes the date of inspection, the signature of the person who performed the inspection and an identifier for the ropes which were inspected shall be kept on file where readily available to appointed personnel. Any deterioration, resulting in appreciable loss of original strength, shall be carefully observed and determination made as to whether further use of the rope would constitute a safety hazard. Some of the conditions that could result in an appreciable loss of strength are the following:

All rope which has been idle for a period of a month or more due to shutdown or storage of a crane on which it is installed shall be given a thorough inspection before it is used. This inspection shall be for all types of deterioration and shall be performed by an appointed person whose approval shall be required for further use of the rope. A certification record shall be available for inspection which includes the date of inspection, the signature of the person who performed the inspection and an identifier for the rope which was inspected.

The electromagnetic inspection of wire ropes is well known. It has been in use and proven for more than thirty years for mines and ski stations for their mandatory inspections.

In other industries, inspection of wire ropes is most often done visually. Even then, some operations will opt for direct replacement at regular intervals without further verififying wire rope actual level of wear.

It may sometimes prove difficult to perform a visual inspection and the reliability of the results could be argued especially when the inspector is faced with difficult circumstances such as :

Inspections using this technique can usually be performed much quicker than with a visual inspection. This provides the added benefit of releasing the equipment much sooner providing increased production and reduced maintenance downtime.

The electromagnetic inspection detects and records all the critical zones of the wire rope. This, in return, helps the inspector to correctly diagnose the current level of wear, in accordance with the applicable regulations in the domain concerned. (CSA, ISO, ASTM, SABS, ASME, RSSTM, RBQ, CSST, etc.)

Industrial equipment are operating under harsh conditions and wire ropes can thus suffer high wear rates. An inspection method providing a high precision therefore allows a reliable determination of wear and, thus, a maximized life.

Note that CSA Z248 does NOT allow 8×19, 19×7, 19×19 or similar rotation resistant ropes to be used. See 4.11.1 d)ii) which states that “Rotation-resistant wire rope shall not be used …. unless the rope has 15 outer strands or more (ASTM A1023/A1023M Category 1 wire rope) or the inner core is plastic coated.” For tower cranes this includes our Python® Compac 18.

Rotation Resistant ropes (having less than 14 outer strands) are very difficult to inspect since they tend to fatigue from the inside-out of the rope. Also, nearly all European tower cranes require high strength non-rotating ropes and neither 19×7 nor 19×19 types fulfill the demand on strength and/or on non-rotating properties.

For the older Pecco “double sheave lower suitcase block”, which is used strictly in a 2-line configuration, a regular 6×36 IWRC rope is sufficient, provided the building height is no more than 10-12 floors. Here, large line spacing prevents the block from spinning.

Linden, some Kroll- and Comedil tower cranes which have the 3- or 4 sheave arrangement in the block are ‘rope killers’. The reverse bend in such systems is so severe that short rope life MUST be expected. Under NO circumstances should you use 19×7/19×19 ropes. Even if you use our Python® non-rotating ropes we will NOT guarantee against bird-cages and other rope deformations as a result of such reeving systems. There have been reported sudden and unexpected rope failures. Such set ups are quick and easy to convert from a 2 part to a 4-part line but it’s not ideal from a wire rope standpoint … and there is nothing we can do about it; you simply have to learn to live with it and INSPECT … INSPECT … INSPECT !

If you do not pay attention to the inspection and maintenance of the wire rope when using the crane in normal times, it is easy to cause the wire rope to break due to negligence and cause catastrophe. In daily use, attention should be paid to damages such as broken wires, abrasion, and deformation of the wire rope. Our editor will share with you the requirements and standards for wire rope inspections and the scrap standards for hoisting wire ropes.

Broken wire: Broken wires are divided into inner broken wires and outer broken wires. The steel wire that admits that the cracks or scars have reached half the diameter of the steel wire shall be regarded as broken wires.

Corrosion: Check the degree of rust, pitting, and curium corrosion. It is difficult to check the appearance of internal corrosion. When the steel wire is severely slack, it should be regarded as internal corrosion.

Rope end fastening parts: check the defects of the pressure block, cracks, and deformation of the rope end to see if some of the fixed rope ends are pulled out or slipped.

The number of broken wires in a lay length (referring to the axial interval in which any wire rope strand is coiled for one week) of the twisted wire rope reaches 10% of the total wire number of the rope.

For steel wire ropes for lifting hot metal or dangerous goods, the number of scrapped wires and broken wires is half of that of ordinary cranes. For example, the broken wires will occur in some places, or the broken wires will occur in one strand within six times the diameter of the wire rope. , Should be voided according to half of the rule in item 1.

There are cracks or slipping deformation at the joint between the steel wire rope and the aluminum alloy; the insertion part of the inserted braided steel wire rope has severe withdrawal; the casting wire rope anchorage and the connection part of the wire rope have displacement, causing the phenomenon of withdrawal.

There is abrasion or corrosion on the surface of the wire rope, and there are a certain number of broken wires. The number of broken wires should be multiplied by the reduction factor in the rules of item 1 or 2 to determine: when the wear or corrosion rate is 10%, 15 %, 20%, 30%-40%, the reduction factor corresponds to 85%, 75%, 70%, 60%, 50%.

The wire rope bumps, jumps out of the pulley, entangled messy, etc. will cause damage to the wire rope. Be sure to pay attention to inspection when using it.