Grade 8 Two Leg Lifting Chain Slings
The Hack8 range comprises pre-assembled and certified Grade 8 (also referred to as Grade 80) lifting chain slings, available in chain diameters from 7 mm up to 32 mm.
In addition to the Hack8 range, William Hackett also offers the Hack10 line of Grade 100 chain sling components. As with Grade 8 and Grade 80 being interchangeable terms, Grade 10 and Grade 100 refer to the same classification (likewise Grade 12 and Grade 120). Grade 100 components provide a higher capacity-to-diameter—and therefore capacity-to-weight—ratio when compared with traditional Grade 80 chain and components.
A chain sling can be manufactured to virtually any required length, subject to chain link increments. The length is defined as the Effective Working Length (EWL), measured from the bearing point of the master link or main ring to the bearing point of the hook. Slings can also be supplied with temporary shortening grab hooks, which are particularly useful for lifting uneven or asymmetrical loads, or when handling loads of varying sizes.
Key Features of Hack8 2-Leg Lifting Chains
- Component standards: Components are designed and manufactured in accordance with EN1677-1 and are suitable for use in chain slings certified to EN818-4.
- Chain standards: designed and manufactured in accordance with EN818-2 and ASTM A391/A391M, and suitable for use in chain slings certified to EN818-4.
- RFID Enabled: chain sling assembly tags contain an RFID chip to relay product and certification details digitally.
- Product sizes: available for chain sizes from 7mm to 32mm and with working load limits from 1.5 tonnes to 67.0 tonnes (depending on the number of sling legs and lifting angles).
- Temperature: operational temperature range of - 40°C to + 200°C without reduction in working load limit.
- Material: alloy steel.
- Testing: components and chain proof load tested to 2.5 times the working load limit.
- Safety factor: 4 : 1.
Grade 80 Chain Diameters and Capacities
- 7mm = 1.5 to 2.1 tonnes (1,500-2,100kg).
- 8mm = 2 to 2.8 tonnes (2,000-2,800kg).
- 10mm = 3.15 to 4.25 tonnes (3,150-4250kg).
- 13mm = 5.3 to 7.5 tonnes (5,300-7,500kg).
- 16mm = 8.0 to 11.2 tonnes (8,000-11,200kg).
- 20mm = 12.5 to 17 tonnes (12,500-17000kg).
- 22mm = 15 to 21.2 tonnes (15,000-21,200kg).
- 26mm = 21.2 to 30 tonnes (21,200-30,000kg).
- 32mm = 31.5 to 45 tonnes (31,500-45,000kg).
See the load chart below for more details on WLLs (working load limits) in various configurations.
Working Load Limit: Hack8 Grade 80 Two Leg Chain Slings
Uniform Load Method of Rating BS EN 818-4
All general-purpose slings should be rated by the uniform load method as shown in the table below.
| Chain Size |
 |
2 Leg Chain Sling
0°-45° |
2 Leg Chain Sling
45°-60° |
| 7mm |
2.1 tonne |
1.5 tonne |
| 8mm |
2.8 tonne |
2.0 tonne |
| 10mm |
4.25 tonne |
3.15 tonne |
| 13mm |
7.5 tonne |
5.3 tonne |
| 16mm |
11.2 tonne |
8.0 tonne |
| 20mm |
17.0 tonne |
12.5 tonne |
| 22mm |
21.2 tonne |
15.0 tonne |
| 26mm |
30.0 tonne |
21.2 tonne |
| 32mm |
45.0 tonne |
31.5 tonne |
Grade 80 Chain Fittings & Terminations
Various fittings for single, two, three, and four-leg chain slings are available, including clevis sling hooks, self-locking hooks, and eye grab hooks, with options for bespoke arrangements.
Take a look at our full range of chain slings to find out more about the options available, including different end fittings, different materials, and higher lifting working load limits.
Clevis Sling Hook
Clevis Self-Locking Hook
Shortening Eye Grab Hook
Note: The chain fittings shown above are the more popular hooks and leg length adjuster types. Chain sling assemblies can be supplied with alternative fittings in Grade 8, Grade 10 or Grade 12 to suit your requirements...
- C Hooks
- Swivel Hooks
- Eye Hooks
- Foundry Hooks
- Clevis Shackles
- Reevable Egg Links
If this is the case, contact us with your requirements (number of legs, capacity, fitting types and length) for a quote.
Chain Sling Selection Guidance
This information provides detailed WLLs for various chain sizes and configurations, emphasising the importance of selecting the correct chain size and configuration for safe lifting operations. All lifting applications should be assessed by a competent person in order to establish the size and type of sling required.
Angle Tensions
In the case of multi-leg slings, the angle between the legs is critical. The actual tension on each leg increases when the angle between the legs increases, as shown in the diagram opposite. For this reason, all general-purpose chain slings are given a rating based on use at 90º incl. angle. The included angle between the legs should never exceed 120º.
Chain Sling Headroom
The distance between the crane hook and the load is known as the “Headroom”. If a specific headroom is required, the “Reach” of the chain sling must increase as the angle between the legs increases, as shown opposite.
Lifting Reach - Effective Working Length
Also known as bearing to bearing (b-b) or chain length.
The reach of a chain sling is the distance between the bearing points of the upper and lower terminal fittings. This distance, commonly known as the “Bearing to Bearing”, should be quoted when ordering slings.
Shortening grab hooks may be fitted to a sling, making the reach adjustable, hence increasing the versatility of the sling.
Unusual Lifting Applications
Recommended Load Factors for unusual slinging methods and conditions.
Factor normally applied to W.L.L. of a Single Chain.
