Apex Global WLS 4-Legged Chain Sling (Grade 80)

Engineered for heavy-duty industrial lifting, our 4-legged chain sling provides the ultimate balance of stability, load distribution, and safety. Constructed from high-strength Grade 80 alloy steel, this assembly is designed to meet the rigorous demands of manufacturing, construction, and heavy infrastructure projects.

Advantages

·         Superior Stability: The 4-leg configuration allows for secure, balanced lifting of complex loads, ensuring the weight is distributed evenly across all points.

·         Grade 80 Alloy Steel: Offers an exceptional strength-to-weight ratio, high wear resistance, and the ability to withstand harsh industrial environments, including exposure to heat and sharp edges.

·         Fully Certified: Each assembly is supplied with a comprehensive inspection tag and meets applicable safety standards for guaranteed performance.

·         Positive Hook Engagement: Equipped with heavy-duty safety latch hooks, ensuring the load remains secure throughout the entire lift cycle.

·         Versatile Application: Adaptable to various rigging configurations, making it the preferred choice for heavy machinery and structural components.

Primary Applications

·         Heavy Manufacturing: Lifting large steel structures, motors, and heavy machinery components.

·         Construction: Managing prefabricated concrete panels, steel beams, and heavy materials on-site.

·         Logistics & Ports: Efficient, safe loading and unloading of heavy industrial containers and equipment.

·         Maintenance & Repair: Providing safe lifting solutions for heavy engine blocks and plant equipment during maintenance shutdowns.

Understanding Working Load Limits (WLL)

Note: The WLL of a chain sling is dependent on the angle of the legs. As the angle of the legs increases, the effective working load limit decreases.

Technical Specifications

·         Material: High-Tensile Alloy Steel (Grade 80).

·         Configuration: 4-Legged with Master Link assembly.

·         Finish: Corrosion-resistant coating for long service life.

·         Safety Features: High-visibility yellow powder-coated hooks with spring-loaded positive locking latches.

·         Compliance: Designed to meet international industrial safety and lifting standards.

Engineering Principles for Sling Angles

It is essential for your technical documentation to explain why these values decrease as the angle widens. When a sling is rigged at an angle, the tension in each leg increases due to the horizontal component of the force.

·         Vertical Lift (0°): The load is distributed equally across all legs, providing maximum WLL.

·         Angled Lift (45°-60°): As the angle from the vertical increases, the legs must support not only the weight of the load but also the induced horizontal force (stress) caused by the angle.

·         The 4-Leg Rule: In a 4-legged sling, it is standard engineering safety practice to rate the assembly based on the assumption that only three legs are bearing the load simultaneously, as it is mathematically difficult to ensure that all four legs are tensioned equally in real-world conditions.

Important Safety Notice:

·         All WLL values provided are based on the standard use of Grade 80 alloy steel chain slings in a uniform load environment.

·         These values are intended as a guideline. Always refer to the specific test certificate provided with your equipment for precise load capacities.

·         Ensure the angle between legs never exceeds 60° from the vertical. Exceeding this angle will result in a rapid decline in the WLL, posing a significant safety risk.

·         Regular inspection for wear, deformation, and elongation is mandatory to ensure the continued integrity of these ratings.

·         Note: Data based on Grade 80 alloy steel components. For 4-legged slings, the WLL is calculated as 2.1 times the WLL of a single leg at 0-45°, and 1.5 times the single leg WLL at 45-60° (using the standard assumption that only three legs are effectively supporting the load).

4-Legged Chain Sling Working Load Limit (WLL) Chart