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Wire Rope Clips: Different Types, Installation, and Common Mistakes

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Wire rope is an extremely versatile mechanical device that can be used to help support and move an object or load. Whether for use on cranes or for other lifting applications, it’s important to have a solid understanding of the rigging components that are being used to attach to and lift a load.

 

As a rigger or end-user of wire rope, it’s necessary to understand the types of wire rope end termination, or treatments that can be used at the ends of a length of wire rope—one of the most common being wire rope clips.

 

In this article, you can expect to learn:

 

What a wire rope clip is

Types of wire rope clips

Common mistakes when using wire rope clips

Steps to install a wire rope clip

 

What is a Wire Rope Clip?

Wire rope clips can be used to form a load bearing eye at the end of a cable or wire rope, or to connect two cables together with a lap splice. Wire rope clips are popular because they can be installed in the field and provide 80-90% efficiency of the rope breaking strength, depending on the diameter of the wire rope.

 

As a general guideline, they are NOT to be used for making slings, as ASME B30.9 Slings standard states: “Mechanical wire rope terminations requiring periodic adjustment to maintain efficiency shall not be used to fabricate slings.”

 

Examples of situations where a wire rope clip could be utilized include:

 

Wire rope end termination on a crane cable or winch

To run a length of wire rope through an eye bolt or shackle

Perimeter cables on docks, parking lots, etc.

 

There are two main types of wire rope clips—U-Bolt and double saddle clips. U-Bolt wire rope clips are the most common and may be made of forged or malleable metal.

 

U-Bolt Wire Rope Clips

This type of wire rope clip is essentially a U-bolt, two nuts, and a metal base (saddle) that can be made from forged steel or cast iron. Careful consideration and attention must be given to the way U-bolt type wire rope clips are installed.

 

Forged Wire Rope Clips

The base of the wire rope clip is made from forged steel. Forged clips are heated and hammered into the desired shape—resulting in a consistent grain structure in the steel. Forged wire rope clips are used for critical, heavy-duty, overhead loads such as winch lines, crane hoist lines, support lines, guy lines, towing lines, tie downs, scaffolds, etc.

 

Malleable Wire Rope Clips

Malleable wire rope clips are used for making eye termination assemblies only with right regular lay wire rope and only for light duty uses with small applied loads, such as hand rails, fencing, guard rails, etc. The base of the wire rope clips is made from malleable cast iron, which may fracture under heavy use and does not have the desirable metal properties of steel, or the beneficial grain structure that a forged base has.

 

Double Saddle Wire Rope Clips

Double saddle wire rope clips consist of two saddles, each with a leg, and two nuts—one used on the top and one on the bottom. Double saddle wire rope clips can be used in either direction, so they take the guesswork out during installation when applying to the live end and the dead end of a piece of wire rope.

posted Mar 14 by Aop10sd

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How to Use Different Types of Strapping Material

All interested parties are welcome to join in the ongoing revisions to D3953, Specification for Strapping, Flat Steels and Seals. The standard is under the jurisdiction of Subcommittee D10.25 on Palletizing and Unitizing of Loads, part of ASTM International Committee D10 on Packaging.

 

According to its scope, D3953 covers flat steel strapping and seals intended for use in closing, reinforcing, bundling articles for shipment, unitizing, palletizing and bracing for carloading, truckloading, lifting and lashing. "Most people have dealt with the material covered by D3953 without knowing it," says Anthony Mariano, Independent Metal Strap Co. Inc., and a D10 member.

 

"As one of the first modern materials used for unitizing and bundling, oiled steel strapping is well-known to packaging users, but since the last full review of D3953, there have been many changes in technology, especially in closure methods," says Peter Catlos, chairman of D10.25. These technological changes will be addressed in ongoing revisions.

 

Catlos notes that waxed steel strapping is widely used in the lumber, metals and paper industries. The standard is used to specify strapping products for purchase, in package design and in design of load securement techniques for over-the-road, rail and maritime transport of goods. Section 13 of D3953 includes several test methods for steel strapping.

 

Every person who has ever worked with galvanized steel strapping knows that this can be a potentially dangerous product. When talking to potential customers I hear many stories from people who have been injured by steel banding. Either caused by loose hanging pieces of cut metal strapping or when applying and the steel snapped unexpectedly. 

 

Companies take many safety precautions to protect their employees. Safety glasses, helmets, shoes are part of most workers Personal Protection Equipment (PPE) and still many companies provide their staff with "razor blades" to secure their products. Of course there are always people that deny the risks of steel banding but fact is that people getting cut is very high on the list of job related accidents.

 

Cordstrap already recognized this risk over 50 years ago and invented a safe alternative for steel banding. The latest generation of Cordstrap strapping is a composite strap made of high tenacity polyester yarns embedded in a PP coating. The Cordstrap strapping products are an extremely strong alternative for steel banding. Due to the unique buckle joint Cordstrap's overall system strength will be higher compared with steel banding.

 

Most of all, Cordstrap strapping systems are safe for your products, safe for your employees and safe for your customers. In Australia Cargo Restraint Systems offers a wide range of Cordstrap systems. We always welcome the opportunity to take a closer look at your applications and provide you with a safe solution. Just contact us and it will be our pleasure to assist you.

 

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Strapping is applied either manually with a hand tool or automatically with a strapping machine. In both cases, a strap or band is feed around the product and pulled taught. A fastening method then secures the ends of the strap around the product and the excess material is removed.

 

Strapping materials are available in many different strengths with specific grades and classifications. It is important to understand these grades and how they can affect your material choice when choosing your packaging. How your product is transported will affect the rating system and materials used. The two associations who grade strapping are the American Association of Railroads and ASTM International. Although ratings can be similar, it is important to understand that the designations are not interchangeable.

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