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Chain Assemblies

Posted on 15-12-2020 by Nicky

What chain assembly do I need for my lifting job?

A number of questions are important for choosing the right lifting chain.

Examples of important questions are:

How can the load best be taken lifted?
How many attachment points are there and how big are they?
How heavy is the load to be lifted? Is the load sensitive to damage?
What is my maximum lifting height and how far apart are the attachment points?
Which parts you choose in a lifting chain composition is of course also important. Do you opt for shortening hooks so that you can tailor the chain yourself, or, for example, use it more flexibly for multiple jobs? Do you opt for safety hooks or flap hooks? How big should your top link be for your hook to fit?
In our online store you can easily put together your own lifting chain. The different main categories can be found on the menu. This is the start of your "quest". And if you have found the perfect chain composition for your lifting job, you can easily enter further options on the product page such as the length, the workload, and the type of hooks. You can also choose to order a certificate or not.
With the lifting chains in our shop, you will find a diagram where you can easily read what the workload is of chains in various situations. The working load depends on the chain diameter, the version, the use, and the angle at which it is lifted. At an outside angle of 0-45o (favorable lifting angle), the working load is higher than with an outside angle of 45-60o (unfavorable lifting angle). It is not allowed to lift at an outside angle greater than 60o! So always take into account the distance of your attachment points, your chain length, and the lifting angle.

Which chain should I choose for the weight of my load?

See below the  diagram for more information

For example you have a load of 3,000 kg. with 2 attachment points. You want to hoist with a chain sling with 2 legs. If the chain is long enough (and your lifting height is sufficient) you can lift the load with an 8 mm chain sling with 2 legs (at an outside angle between 0-45o, the working load of an 8 mm fork is 3,500 kg). However, if you cannot stay within this "favorable" lifting angle, you need a chain of 10 mm. The working load is then 4,000 kg. This can occur if, for example, your lifting height is not sufficient. The 8 mm fork has a working load of 2,500 kg in the unfavorable angle and that's not enough for your 3,000 kg load.
With a chain sling with 2 legs of 8 mm, you are allowed a maximum of 3,500 kg at a favorable angle, lifting and at an unfavorable angle a maximum of 2,500 kg. You may not hoist at an outside angle greater than 60o

Also, pay attention to the differences in the workload when choking a chain.

Which hooks can I attach to my lifting chain?

A lifting hook must always be provided with a safety valve. We have 2 types of hooks; Sling / Latch hooks and Safety hooks

A Latch hook is provided with a metal valve that opens inwards (in the hooks) the advantage of this hook, is dat it is cheaper in purchase. And easier to use due to the valve that opens inward. The disadvantage is that the valves break more quickly.

With a Safety hook, the valve is part of the hook itself. The hook opens outwards and closes automatically if weight is caught on the hook. The disadvantage is that these hooks are more expensive. The advantage is that they are "foolproof" and the valve is strong.

A difference is also made between a clevis hook and an eye hook. A clevis hook fits directly to the chain, with an eye hook an extra connection must be used between the hook and the chain (we call this a connecting link). The clevis is adjusted to the diameter of the chain. A clevis hook and eye hook hooks are both available with a latch hook and a safety hook version.

Swivel hooks are also available with a safety hook or a latch hook.

Shortening / Grab hooks

With a shortening hook you can shorten a chain. Especially with the load where there is a difference in attachment points, you can tailor the chain so that the load is stable. You can attach a shortening hook to a chain or later by means of add a separate shortening set. Liftinggear-shop also supplies masterlinks with the shortening hooks already attached. This saves costs in purchase, but the chain also has fewer wear parts, which can also save maintenance costs.

Please pay attention while ordering that we are talking about the working length. This is not the same as the chain length. The working length is the length from the inside of the hook to the inside of the top link (the effective length of the chain).

Liftinggear-shop supplies all chains in Grade 100 quality. With a Grade 100 chain, the working load is higher than with a Grade 80 chain with the same dimensions. This is because Grade 100 is a stronger material than Grade 80. We also have stainless steel chain assemblies in the range.

All chains comply with NEN-EN 1677 and EN-818 standards and are available including an certificate.

An alternative to lifting chains are round slings, lifting straps, and their assemblies. Due to its low weight, this is often a good consideration. They are also often better suited for loads that must not be damaged.

You have also come to the right place for loose hooks, chain work, or spare parts.

For more information, feel free to contact one of our technical advisers

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