A Three Leg Chain Sling (Triple Leg) is a highly stable lifting assembly featuring three lengths of robust alloy steel chain securely connected to a single central master link, designed for complex hoisting operations.
Specifically designed for lifting circular, hexagonal, or irregularly shaped loads where attachment points are spaced 120 degrees apart.
Unlike 4-leg slings where one leg may "float" on rigid loads, the 3-leg configuration ensures equal weight distribution across all legs at all times.
Manufactured from high-strength Grade 80 Alloy Steel (Quenched and Tempered) for maximum durability and fatigue resistance.
Fully compliant with EN 818-4 standards, featuring a 4:1 Safety Factor for assured operational safety.
Utilizes a Master Link Sub-Assembly (Triple Link) to prevent overcrowding at the crane hook and ensure proper leg articulation.
Available in chain sizes from 6mm to 32mm. Standard fittings include Clevis Self-Locking Hooks or Sling Hooks; shortening Grab Hooks can be added.
Q: When should I use a 3-leg chain sling instead of a 4-leg sling?
A: A 3-leg sling is mathematically superior for ensuring a stable lift on rigid loads. In geometry, three points define a plane. In a 4-leg configuration lifting a stiff object (like a concrete box), it is common for only 3 legs to carry the weight while the 4th balances or goes slack.
A 3-leg sling ensures all legs are under tension, making it ideal for uneven, circular, or rigid loads where load sharing is critical.
| Chain Size (mm) |
WLL / Capacity (tons) | Clevis Self Locking Hook |
Clevis Self Locking + Grab Hook |
Clevis Sling Hook |
Clevis Sling + Grab Hook |
|
|---|---|---|---|---|---|---|
| 0-45° | 45-60° | |||||
| 6 | 2.36 | 1.7 | 503001306 | 503002306 | 503003306 | 503004306 |
| 7 | 3.15 | 2.24 | 503001307 | 503002307 | 503003307 | 503004307 |
| 8 | 4.25 | 3.0 | 503001308 | 503002308 | 503003308 | 503004308 |
| 10 | 6.7 | 4.75 | 503001310 | 503002310 | 503003310 | 503004310 |
| 13 | 11.2 | 8.0 | 503001313 | 503002313 | 503003313 | 503004313 |
| 16 | 17.0 | 11.8 | 503001316 | 503002316 | 503003316 | 503004316 |
| 18 | 21.2 | 15.0 | 503001318 | 503002318 | 503003318 | 503004318 |
| 20 | 26.5 | 19.0 | 503001320 | 503002320 | 503003320 | 503004320 |
| 22 | 31.5 | 22.4 | 503001322 | 503002322 | 503003322 | 503004322 |
| 26 | 45.0 | 31.5 | 503001326 | 503002326 | 503003326 | 503004326 |
| 32 | 67.0 | 47.5 | 503001332 | 503002332 | 503003332 | 503004332 |
A 3-leg chain sling is a type of lifting equipment used in material handling and lifting applications. It consists of three lengths of chain that are attached to a master link or a connecting link at one end and have hooks or other attachments at the other ends. The three legs of the sling are typically connected to a lifting hook or other lifting device.
Three contact points ensure balanced lifting for circular and irregular loads
Superior balance and control during lifting operations
Alloy steel chains built for demanding industrial use
Chain slings are often made of alloy steel, providing strength and durability. The chains are designed to withstand heavy loads and harsh working conditions.
The three legs of the chain sling are usually attached to a master link or a connecting link, which is then connected to a lifting device. The legs are evenly spaced to ensure proper load distribution.
The ends of the chain legs are equipped with hooks, shackles, or other attachments that secure the load during lifting. These attachments are designed to provide a secure connection to the load.
The load capacity of a 3-leg chain sling depends on factors such as the size and strength of the chain, the type of hooks or attachments used, and the working load limits specified by the manufacturer.
Chain slings are versatile and can be used in various lifting applications. They are commonly used in industries such as construction, manufacturing, and shipping for lifting heavy and bulky loads.
Regular inspection and maintenance are crucial for ensuring the safety and reliability of chain slings. Inspections should check for wear and tear, damage, and proper functioning of hooks and attachments.
When using a 3-leg chain sling, it's essential to follow safety guidelines and regulations. Proper training of personnel involved in lifting operations is crucial to prevent accidents and ensure the safe use of the equipment.
Always refer to the manufacturer's guidelines and industry standards for the specific 3-leg chain sling you are using, as the design and specifications can vary. Additionally, compliance with local safety regulations and standards is essential to ensure safe lifting operations.
EN 818-4 - Safety Requirements for Lifting Accessories
The Machinery Directive stipulates that where chain with welded links is used for lifting accessories it is to be of short line type and for the purposes of this standard this is chain having a ratio of nominal pitch to nominal size of 3:1.
This European Standard specifies the requirements related to safety, methods of rating and testing of single-, two-, three-, four-leg and endless chain slings assembled by:
using short link grade 8 medium tolerance lifting chain conforming to EN 818-2 together with the appropriate range of components of the same grade.
