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2 Leg Lifting Chains and the 2 Tonne Standard

Published on: Sep  04, 2025 | Source: chen | Hits: 0

A rigging setup often needs balance between stability and capacity, and that is where 2 leg lifting chains become essential. They handle offset loads with more control than a single leg, while still staying simpler than multi-leg slings. When paired with a 2 tonne lifting chain, operators achieve reliable performance across factories, warehouses, and construction projects. This guide outlines how to select, size, and maintain these systems with evidence-based checks so that every lift remains predictable and safe.


Why Choose 2 Leg Lifting Chains

Two legs give stability by spreading tension and reducing side swing. They are especially suited to loads with two fixed lifting points such as beams, machinery frames, or bundled stock. Unlike single-leg slings, they minimize rotation while still being lighter and faster to set compared with four-leg assemblies. With adjustable shorteners, crews fine-tune leg length, which improves balance and reduces stress on each connection.


Defining the 2 Tonne Lifting Chain

The 2 tonne lifting chain refers to a chain assembly rated with a Working Load Limit (WLL) of 2 tonnes under specified conditions. Manufacturers test these chains to standards such as EN 818-2 and DIN 5687, ensuring consistent metallurgy, heat treatment, and dimensional control. A 2 tonne chain commonly uses alloy steel links hardened to meet G80 or G100 grades, depending on project requirements. The rating reflects straight vertical lifts, and operators must always apply reduction factors for angles, choker configurations, or edge conditions.

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Key Selection Steps

Choosing the correct chain sling involves several measurable checks:

Identify routine load weight—always size for the heaviest recurring lift, not an occasional peak.

Confirm geometry—measure spacing between load points; ensure angles to vertical stay between 15° and 60°.

Check WLL table—multiply load by angle factor, then choose the smallest diameter that exceeds the result.

Match components—all links, hooks, and master rings must be the same grade (e.g., all G80).

Check hook throats—leave at least 10% clearance at the load point to prevent tip-loading.


Angle and Mode Factors

Every sling’s capacity changes with geometry. The table below shows common factors applied to WLL when using 2 leg lifting chains.

Configuration

Angle to Vertical (β)

Factor (×)

Effective WLL (for 2T chain)

Single-leg vertical

1.0

2.0T

Two-leg, 0° < β ≤ 45°

1.4

2.8T

Two-leg, 45° < β ≤ 60°

1.0

2.0T

Choker hitch

0.8

1.6T


lmage: A two-leg lifting chain attached to a steel frame, angles marked at 45'


Inspection and Maintenance

Inspection keeps the WLL valid. Operators should:

Measure average link diameter—retire chains that lose ≥10% material.

Compare five-link pitch with nominal—retire if stretch reaches ≥3%.

Inspect hooks—remove if throat opening increases by >10%.

Watch for cracks, heat tint, or stiff articulation; remove affected chains.

Keep slings clean, dry, and stored on racks; after chemical exposure, rinse and dry before reuse.


Practical Applications

Factories: moving machine bases with two defined pad-eyes.

Construction: lifting concrete beams with dual rebar loops.

Transport: loading skids evenly with minimized rotation.

Maintenance shops: pairing 2 leg chains with spreaders for gearbox lifts.


Conclusion

Using 2 leg lifting chains in combination with a 2 tonne lifting chain gives balanced, verifiable control for everyday rigging. With correct selection, inspection, and logging, you lift safely and extend equipment life—then contact TOPONE CHAIN to source certified assemblies that match your site’s requirements.

Our chains are mostly exported to more than 30 countries
both in European and Asian markets.