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Name: Grade 100 DOF Chain Sling – Double Leg Chain Sling w/ Oblong Master Link on Top and Two Foundry Hooks on Bottom
MOQ: 100 Sets
Package: Carton + Steel Pallet
Manufacturing Standards: Manufactured from quenched and tempered Grade 100 alloy steel chain and components in accordance with EN 818-2, EN 1677-1, EN 1677-2, EN 1677-4, ASME B30.9, OSHA 1910.184, AS 2321, and ISO 3077 requirements for Grade 100 lifting chain sling assemblies.
Testing Standards: Manufactured with a minimum design factor of 4:1. Each sling is proof tested, visually inspected, dimensionally verified, and checked for component compatibility before shipment. The chain complies with EN 818 fatigue requirements and successfully withstands 20,000 load cycles at 1.5 times the Working Load Limit (WLL). Every sling is supplied with an individual serial number, identification tag, written certification, and complete traceability records.
Application Standards: Suitable for overhead lifting, two-point lifting, heavy machinery handling, structural steel erection, foundry operations, precast concrete installation, equipment installation, and industrial material handling operations.
Maintenance Standards: Inspect before each use for chain elongation, excessive wear, cracks, corrosion, deformation of foundry hooks, damaged master links, connecting links, and missing identification tags. Remove the sling from service immediately if defects exceed the applicable inspection criteria.
Grade 100 DOF Chain Sling is a double-leg lifting assembly manufactured from quenched and tempered Grade 100 alloy steel chain and components. The sling is equipped with a Grade 100 oblong master link on the top and two Grade 100 foundry hooks on the bottom, making it suitable for heavy-duty lifting applications requiring large hook openings and balanced two-point load distribution.
Compared with Grade 80 chain slings, Grade 100 slings provide approximately 25% higher Working Load Limit for the same chain size while maintaining a 4:1 design factor. The foundry hooks feature a wide throat opening for connecting to large lifting lugs, castings, steel fabrications, and oversized attachment points, while the double-leg configuration improves load stability and distributes lifting forces evenly between two lifting points.
D = Double Leg
O = Oblong Master Link
F = Foundry Hook
DOF therefore refers to a Double Leg Chain Sling fitted with an Oblong Master Link on the top and Two Foundry 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 written certification and sales order record, ensuring complete product traceability throughout its service life.
| Design Factor | 1-Leg Sling | 2-Leg Sling | 3-Leg & 4-Leg Slings | ||||
| 4:1 |  |  |  | ||||
| Angle | 90 Degrees | 60 Degrees | 45 Degrees | 30 Degrees | 60 Degrees | 45 Degrees | 30 Degrees |
| Dim | 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″ | 2,700 | 4,700 | 3,800 | 2,700 | 7,000 | 5,700 | 4,000 |
| 9/32″ | 4,300 | 7,400 | 6,100 | 4,300 | 11,200 | 9,100 | 6,400 |
| 5/16″ | 5,700 | 9,900 | 8,100 | 5,700 | 14,800 | 12,100 | 8,500 |
| 3/8″ | 8,800 | 15,200 | 12,400 | 8,800 | 22,900 | 18,700 | 13,200 |
| 1/2″ | 15,000 | 26,000 | 21,200 | 15,000 | 39,000 | 31,800 | 22,500 |
| 5/8″ | 22,600 | 39,100 | 32,000 | 22,600 | 58,700 | 47,900 | 33,900 |
| 3/4″ | 35,300 | 61,100 | 49,900 | 35,300 | 91,700 | 74,900 | 53,000 |
| 7/8″ | 42,700 | 74,000 | 60,400 | 42,700 | 110,900 | 90,600 | 64,000 |
| 1″ | 59,700 | 103,400 | 84,400 | 59,700 | 155,100 | 126,600 | 89,550 |
| 1-1/4″ | 90,400 | 156,600 | 127,800 | 90,400 | 234,900 | 191,800 | 135,600 |
Name: Grade 100 DOF Chain Sling – Double Leg Chain Sling w/ Oblong Master Link on Top and Two Foundry Hooks on Bottom
MOQ: 100 Sets
Package: Carton + Steel Pallet
Manufacturing Standards: Manufactured from quenched and tempered Grade 100 alloy steel chain and components in accordance with EN 818-2, EN 1677-1, EN 1677-2, EN 1677-4, ASME B30.9, OSHA 1910.184, AS 2321, and ISO 3077 requirements for Grade 100 lifting chain sling assemblies.
Testing Standards: Manufactured with a minimum design factor of 4:1. Each sling is proof tested, visually inspected, dimensionally verified, and checked for component compatibility before shipment. The chain complies with EN 818 fatigue requirements and successfully withstands 20,000 load cycles at 1.5 times the Working Load Limit (WLL). Every sling is supplied with an individual serial number, identification tag, written certification, and complete traceability records.
Application Standards: Suitable for overhead lifting, two-point lifting, heavy machinery handling, structural steel erection, foundry operations, precast concrete installation, equipment installation, and industrial material handling operations.
Maintenance Standards: Inspect before each use for chain elongation, excessive wear, cracks, corrosion, deformation of foundry hooks, damaged master links, connecting links, and missing identification tags. Remove the sling from service immediately if defects exceed the applicable inspection criteria.
