Chain slings are the appropriate lifting and rigging equipment for raising large, irregularly shaped, and heated items that conventional slings cannot generally handle. They are made of an alloy steel chain attached to a master oblong chain link that may be readily hooked into any crane, hoist, or jib. The slings also have a hook end fitting tailored to your exact lifting requirements. Aside from hooks, additional characteristics may vary depending on the brand and manufacturer of the chain sling.
Different types of chain slings are explained below:
Single-Leg
Single-leg chains are particularly flexible, since they may be used for both load fastening and pulling. These slings should be used with vertical hitches and at a 90-degree angle when in use.
Double-Leg
Double Chain Slings are great for maintaining balance when lifting goods. These slings are employed at 60, 45, or 30 degrees of lift. Chain capacity will vary depending on the angle of lift and chain size.
Triple-Leg
As previously stated, the triple-leg sling maintains balance while using the same hitch degrees as the double-leg sling.
Quad-Leg
The quad-leg chain sling, also known as a 4-leg bridle sling, provides the most chain lengths on a single chain sling assembly. These have the same 60, 45, and 30-degree lift angles as the triple- and double-leg slings.
Safety Tips for Chain Slings:
- Always utilize slings within the specified working load limits.
- Distribute burdens equally.
- Avoid quick stops, collisions, and lifts.
- Do not twist or tie a chain leg into a knot.
- Avoid using slings with broken, faulty, or worn chains.
- Protect sharp edges and corners with cushioning or guards to prevent chains from coming into contact.
- Inspect hooks.
- Load hooks should not be tilted or pointed
- Clean chains before examination (grease and debris can conceal chain deterioration).
Safe load handling with chain slings
Preparation Before Lifting
Before initiating the lift, check that the load is free to move and not fastened down or otherwise hindered.
When a chain comes into touch with a load, it may be necessary to protect either the chain or the weight, or both, since sharp edges/corners of hard material may bend or damage the chain, or the chain may harm the load due to high contact pressure. Edge/corner protection should be utilized to avoid such damage. A tag line is advised to prevent harmful swaying of the load when positioning it for loading.
When loads are abruptly accelerated or decelerated, dynamic forces develop, increasing the chain's stresses. Such circumstances, which should be avoided, result from snatch or shock loading, such as not picking up the slack chain before beginning to lift, or the shock of a falling load being halted.
The mass of the load
It is critical that the mass of the load to be lifted be known.
Gravity
It is expected that the hook's attachment point lies squarely above the load's center of gravity. Determine the load's centre of gravity in respect to all chain sling attachment points. To hoist the load without rotating or overturning, the following requirements must be met:
a) For single-leg and endless slings, the attachment point should be vertically above the center of gravity.
b) For 2-leg slings, the connection points should be on either side or above the center of gravity.
c) For 3- and 4-leg slings, the connection points are placed in a pattern around the center of gravity. It is preferred if the distribution is even and the attachment points are located above the center of gravity.
Safe lifting.
Hands and other body parts should be kept away from the chain to avoid harm when the slack is picked up. When ready to hoist, take up the slack until the chain is tight. The load should be increased slightly and checked to ensure it is secure and in the appropriate location.
Lifting operators must be aware of the hazards of swinging and tilting loads. This is especially crucial for basket or other loose hitches where friction holds the load.
Conclusion
At Kepro, we put safety first in all we do. We realize the crucial relevance of dependable and long-lasting products in assuring the safety of workers, equipment, and loads during lifting operations. That's why we take great effort to source and deliver only the best chain slings and lifting equipment.
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