Kuplex chain slings designed for safety, strength and overall reliability

Published: 14th May 2010
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The safe and competent use of lifting gear cannot be learned from reading a manual. Practice, training and experience of using slings will make the user competent. The following explains the safe use of Kuplex chain slings and explains the basic principles that should be applied.

• Evaluating the Load

The user should take all practicable steps to establish the weight of any load that they will be using with the sling. Simply making an intelligent guess is not good enough. A drawing may be available giving the weight or it may be calculable within reasonable limits of accuracy. In the case of multi-piece loads (e.g. a bundle of steel rods) one item may be weighed in order to calculate the total weight of the load. If it is likely that the load may have to be lifted again, the weight should be clearly marked on it.

• Tip Lifting of Hooks

All Kuplex hooks are designed to support the load in the bowl. Users should ensure that the hook of a sling engages freely in the lifting point so that the weight of the load is supported in the bowl of the hook. Wedging or forcing the hook tip into the lifting points results in the hook being stressed in a manner for which it was not designed which may easily lead to hook deformation and premature failure.

• Mis-use of Shortening Clutches

Kuplex Shortening Clutches can be mis-used. Ensure that the chain carrying the load always leads out of the bottom of the clutch. If the direction is reversed so that the load-carrying chain leads out of the top of the clutch, this can result in the front portion of the clutch being pulled off and the load released.

• Knotting, Twisting and Transverse Bending of Chain

The chain is designed to support a load in a straight line with the line of force running through the crowns of each link. A chain which is twisted or even worse knotted, cannot develop its full strength and will almost certainly fail prematurely. Users should remove twists from a chain leg before lifting and should NEVER knot a chain. If it is necessary to shorten a chain, a Kuplex Shortening Clutch should be used. Similarly, a chain which is bent under tension across a sharp corner is stressed in a manner for which it is not designed. The user should use timber (or any other suitable material) packing pieces to reduce the severity of this type of stressing.

• Load Stability

Experienced Kuplex chain users will develop the habit of assessing unusual loads and estimating the centre of gravity and then attaching the sling in such a manner that the centre of gravity is below the lifting points, or if this is impossible, well within them. If there is the slightest doubt of the stability of a load, it should be slowly lifted just clear of the ground. If the load tilts, the sling should be re-fixed in a more stable position.

It is imperative that when using a chain sling due care is always taken to ensure safety at all times.

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