TOPONE DOS Grade 80 Double-Leg Lifting Chain Sling

Description

The TOPONE DOS Grade 80 double-leg chain sling is an industrial lifting assembly designed for lifting, securing and handling heavy loads with cranes and other lifting equipment. It is manufactured using quenched and tempered Grade 80 alloy steel chain and compatible Grade 80 lifting components.

The upper part features an oblong master link for connection to a crane hook, while the lower part is equipped with two sling hooks with safety latches for attaching the load. Its double-leg configuration supports two-point lifting and helps improve load stability during lifting operations.

Each sling is individually identified by a serial number and a permanent identification tag specifying the chain size and grade, exact sling length and working load limit (WLL). According to the manufacturer, the assembly is designed with a 4:1 safety factor and supplied with a written certificate.

The TOPONE DOS chain sling is suitable for construction, metalworking, mining, equipment installation, steel structure assembly and general industrial lifting operations. Custom manufacturing is available according to customer requirements, including sling length, hook configuration, master link dimensions and working load requirements.

Key Specifications:

• Manufacturer: TOPONE CHAIN

• Product Type: Double-leg lifting chain sling

• Configuration: DOS

• Chain Grade: Grade 80

• Material: Quenched and tempered alloy steel

• Upper Connection: Oblong master link

• Lower Connections: Two safety-latch sling hooks

• Safety Factor: 4:1

• Chain Size: Custom order

• Sling Length: Custom order

• Working Load Limit (WLL): Depends on chain size and lifting angle

• Identification: Individual serial number and identification tag

• Inspection and Testing: Proof testing, visual inspection and dimensional checks

• Fatigue Testing: Manufacturer states 20,000 cycles at 1.5 times WLL

• Minimum Order Quantity: 100 sets

• Packaging: Carton box and steel pallet

Load Capacity Example:

According to the manufacturer's table, the stated values for a 1/2-inch chain are:

• Single-leg sling: 12,000 lb

• Double-leg sling at 60°: 20,800 lb

• Double-leg sling at 45°: 17,000 lb

• Double-leg sling at 30°: 12,000 lb

The lifting angle is measured relative to the horizontal plane. As the angle decreases, tension in each sling leg increases and the overall lifting capacity decreases.

Advantages:

• Strong Grade 80 alloy steel construction

• Two-point load lifting configuration

• Oblong master link for crane connection

• Two safety-latch hooks for secure load attachment

• Individual serial number and permanent identification

• Written manufacturer certificate

• Customizable sling length and component configuration

• Suitable for demanding industrial and construction lifting operations