Chain sling Grade 80 QOSL

4-pointsteelprecast concrete

Product Overview
Grade 80 QOSL Chain Sling is a quad-leg lifting assembly manufactured from quenched and tempered Grade 80 alloy steel chain and components. The sling is fitted with a quad oblong master link on the top and Grade 80 self-locking hooks on the bottom, suitable for heavy-duty lifting applications requiring secure load engagement and multiple lifting points.

The self-locking hooks engage automatically when the load is applied and remain closed throughout lifting operations, reducing the risk of accidental disengagement. The QOSL configuration is commonly used on construction sites, steel fabrication shops, mining operations, precast concrete handling and heavy equipment installation.

Product Configuration Code

• Q = Quad Leg
• O = Quad Oblong Master Link
• SL = Self Locking Hook

Product Identification

• Individual serial number (per sling)
• Chain size (diameter in mm)
• Chain grade (Grade 80)
• Exact sling length
• Working Load Limit (WLL)

Typical Applications

• Heavy machinery handling
• Structural steel lifting
• Precast concrete installation
• Mining maintenance
• Offshore module transportation
• Industrial material handling

Parameter - Meter table (WLL values in metric tons)
Columns: Diameter (mm) | 1-Leg (ton) | 2-Leg 0°<α<45° (ton) | 2-Leg 45°<α<60° (ton) | 3&4-Leg 0°<α<45° (ton) | 3&4-Leg 45°<α<60° (ton) | Continuous Sling (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 | 2.0 | 2.8 | 2.0 | 4.25 | 3.0 | 3.15
10 | 3.15 | 4.25 | 3.15 | 6.7 | 4.75 | 5.0
13 | 5.3 | 7.5 | 5.3 | 11.2 | 8.0 | 8.5
16 | 8.0 | 11.2 | 8.0 | 17.0 | 11.8 | 12.5
18 | 10.0 | 14.0 | 10.0 | 21.0 | 15.0 | 16.0
19 | 11.2 | 16.0 | 11.2 | 23.5 | 16.8 | 17.9
20 | 12.5 | 17.0 | 12.5 | 26.2 | 18.7 | 20.0
22 | 15.0 | 21.2 | 15.0 | 31.5 | 22.5 | 24.0
26 | 21.2 | 30.0 | 21.2 | 44.5 | 31.8 | 33.9
28 | 25.0 | 33.5 | 25.0 | 52.5 | 37.5 | 40.0
30 | 28.0 | 39.2 | 28.0 | 58.8 | 42.0 | 44.8
32 | 31.5 | 45.0 | 31.5 | 66.1 | 47.2 | 50.4
36 | 40.0 | 56.0 | 40.0 | 84.0 | 60.0 | 64.0
38 | 45.0 | 63.0 | 45.0 | 94.5 | 67.5 | 72.0
40 | 50.0 | 70.0 | 50.0 | 105.0 | 75.0 | 80.0
45 | 63.0 | 88.2 | 63.0 | 132.3 | 94.5 | 100.8
50 | 78.5 | 109.9 | 78.5 | 164.8 | 117.7 | 125.6

Notes on Parameters
Design factor: 4:1 (minimum breaking force at least four times the WLL). The table shows load multipliers and WLL values for different sling configurations and lifting angles. All values are expressed in metric tons.