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Grade 80 TOSL Chain Sling is a triple-leg lifting assembly manufactured from quenched and tempered Grade 80 alloy steel chain and components. The sling is equipped with a quad oblong master link assembly on the top and Grade 80 self-locking hooks on the bottom, providing a reliable lifting solution for applications requiring three-point load attachment.
Compared with single-leg and double-leg slings, the triple-leg configuration offers improved load stability and is commonly used for lifting machinery, structural steel, precast concrete, fabricated components, and other irregularly shaped loads. The self-locking hooks automatically engage when loaded, helping reduce the risk of accidental disengagement during lifting operations.
T = Triple Leg
O = Quad Oblong Master Link Assembly
SL = Self Locking Hook
TOSL therefore refers to a Triple Leg Chain Sling fitted with a Quad Oblong Master Link Assembly on the top and Self Locking Hooks on the bottom.
Each sling is permanently identified with:
Individual Serial Number
Chain Size
Chain Grade
Exact Sling Length
Working Load Limit (WLL)
The serial number on the identification tag corresponds with the production certificate and sales order record, ensuring complete product traceability throughout the product life cycle.
Heavy Machinery Handling
Structural Steel Lifting
Precast Concrete Installation
Equipment Installation
Mining Maintenance
Industrial Material Handling
All chain slings are supplied with written certification and manufactured using matching Grade 80 components to ensure compatibility throughout the lifting assembly.
Meter table
| Diameter of Lifting Chain | 1 Leg | 2 Legs | 3 & 4 Legs | Continuous Sling | ||
|  |  |  | |||
| 0<a<45° | 45°<a<60° | 0<a<45° | 45°<a<60° | |||
| Factor 1.0 | Factor 1.4 | Factor 1.0 | Factor 2.1 | Factor 1.5 | Factor 1.6 | |
| (mm) | (ton) | (ton) | (ton) | (ton) | (ton) | (ton) |
| 4 | 0.5 | 0.71 | 0.5 | 1.06 | 0.75 | 0.8 |
| 5 | 0.8 | 1.12 | 0.8 | 1.6 | 1.18 | 1.24 |
| 6 | 1.12 | 1.6 | 1.12 | 2.36 | 1.7 | 1.8 |
| 7 | 1.5 | 2.12 | 1.5 | 3.15 | 2.24 | 2.5 |
| 8 | 2 | 2.8 | 2 | 4.25 | 3 | 3.15 |
| 10 | 3.15 | 4.25 | 3.15 | 6.7 | 4.75 | 5 |
| 13 | 5.3 | 7.5 | 5.3 | 11.2 | 8 | 8.5 |
| 16 | 8 | 11.2 | 8 | 17 | 11.8 | 12.5 |
| 18 | 10 | 14 | 10 | 21 | 15 | 16 |
| 19 | 11.2 | 16 | 11.2 | 23.5 | 16.8 | 17.9 |
| 20 | 12.5 | 17 | 12.5 | 26.2 | 18.7 | 20 |
| 22 | 15 | 21.2 | 15 | 31.5 | 22.5 | 24 |
| 26 | 21.2 | 30 | 21.2 | 44.5 | 31.8 | 33.9 |
| 28 | 25 | 33.5 | 25 | 52.5 | 37.5 | 40 |
| 30 | 28 | 39.2 | 28 | 58.8 | 42 | 44.8 |
| 32 | 31.5 | 45 | 31.5 | 66.1 | 47.2 | 50.4 |
| 36 | 40 | 56 | 40 | 84 | 60 | 64 |
| 38 | 45 | 63 | 45 | 94.5 | 67.5 | 72 |
| 40 | 50 | 70 | 50 | 105 | 75 | 80 |
| 45 | 63 | 88.2 | 63 | 132.3 | 94.5 | 100.8 |
| 50 | 78.5 | 109.9 | 78.5 | 164.8 | 117.7 | 125.6 |
Continuous Sling
Working Load Limit (WLL) for an endless chain sling configuration.
0° < a < 45°
The angle between the sling leg and the vertical is between 0° and 45°.
45° < a < 60°
The angle between the sling leg and the vertical is between 45° and 60°.
Factor
The load multiplier used to calculate the Working Load Limit for different sling configurations and lifting angles.
a
The angle between the sling leg and the vertical line.
(ton)
All values are expressed in metric tons and represent the maximum Working Load Limit (WLL).
Feet table
| Design Factor | 1-Leg Sling | 2-Leg Sling | 3-Leg & 4-Leg Slings | ||||
| 4:01 |  |  |  | ||||
| Chain Diameter | 90 Degrees | 60 Degrees | 45 Degrees | 30 Degrees | 60 Degrees | 45 Degrees | 30 Degrees |
| Load Factor: 1 | Load Factor: 1.7 | Load Factor: 1.4 | Load Factor: 1 | Load Factor: 2.6 | Load Factor: 2.1 | Load Factor: 1.45 | |
| 7/32″ | 2,100 | 3,600 | 3,000 | 2,100 | 5,500 | 4,400 | 3,200 |
| 9/32″ | 3,500 | 6,100 | 4,900 | 3,500 | 9,100 | 7,400 | 5,200 |
| 5/16″ | 4,500 | 7,800 | 6,400 | 4,500 | 11,700 | 9,500 | 6,800 |
| 3/8″ | 7,100 | 12,300 | 10,000 | 7,100 | 18,400 | 15,100 | 10,600 |
| 1/2″ | 12,000 | 20,800 | 17,000 | 12,000 | 31,200 | 25,500 | 18,000 |
| 5/8″ | 18,100 | 31,300 | 25,600 | 18,100 | 47,000 | 38,400 | 27,100 |
| 3/4″ | 28,300 | 49,000 | 40,000 | 28,300 | 73,500 | 60,000 | 42,400 |
| 7/8″ | 34,200 | 59,200 | 48,400 | 34,200 | 88,900 | 72,500 | 51,300 |
| 1″ | 47,700 | 82,600 | 67,400 | 47,700 | 123,900 | 101,200 | 71,500 |
| 1-1/4″ | 72,300 | 125,200 | 102,200 | 72,300 | 187,800 | 153,400 | 108,500 |
Design Factor 4:1
The minimum breaking force of the sling assembly is at least 4 times its Working Load Limit (WLL).
90 Degrees
The sling is lifting vertically with no sling angle reduction.
60 Degrees / 45 Degrees / 30 Degrees
The angle between each sling leg and the horizontal plane. As the angle decreases, the sling capacity decreases.
Load Factor
A multiplier used to calculate the Working Load Limit based on the number of sling legs and the lifting angle.
WLL Values (lbs)
The numbers shown in the table represent the maximum Working Load Limit in pounds for each chain diameter and sling configuration.
Example:
For a 1/2" chain sling:
1-Leg Sling = 12,000 lbs
2-Leg Sling at 60° = 20,800 lbs
2-Leg Sling at 45° = 17,000 lbs
2-Leg Sling at 30° = 12,000 lbs
3 & 4-Leg Sling at 60° = 31,200 lbs
3 & 4-Leg Sling at 45° = 25,500 lbs
3 & 4-Leg Sling at 30° = 18,000 lbs
Note: The lifting angle shown in this table is measured from the horizontal. Smaller angles result in higher tension in each sling leg and lower overall lifting capacity.
Name: Grade 80 TOSL Chain Sling – Triple Leg w/ Quad Oblong Master Link on Top and Self Locking Hooks on Bottom
MOQ: 100 Sets
Package: Carton + Steel Pallet
