Chain slings are designed to be robust, dependable, and capable of handling demanding tasks. While they generally share these traits, not all chain slings are created equal. Factors like the model, material, and grade determine their performance capabilities. At Kennedy Wire Rope and Sling Company (KWRS), our team of experts has extensive experience helping clients select the right materials and grades for specific applications.
In recent years, organizations such as the American Society for Testing & Materials (ASTM), the American Society of Mechanical Engineers (ASME), and the Occupational Safety and Health Administration (OSHA) have focused on establishing safety standards for chain slings. One key aspect of these standards is the grading system, which uses numbers to denote breaking strengths, thus offering insight into their load-bearing capacities.
The most commonly used grades today, measured in newtons per millimeter squared (N/mm²), include:
- G30 and G43: Not intended for lifting.
- G70: Ideal for tie-down applications.
- G80: Suitable for light lifting duties.
- G100 and above: Designed for heavy-duty lifting operations.
As a general rule, higher grades correspond to greater strength and durability.
When it comes to ensuring safe usage, another critical factor is the Working Load Limit (WLL). This figure represents the maximum recommended weight a chain sling can handle under ideal conditions—preferably during straight-line pulls without any lateral stress. It's essential to note that the WLL doesn't always align directly with the actual weight being lifted but serves as a guideline for selecting appropriate equipment.
For instance, when moving loads overhead, choosing chains with sufficient WLL ensures safety and efficiency. Operators should avoid applying side-loading forces whenever possible since this can compromise structural integrity over time.
At KWRS, we pride ourselves on offering tailored solutions based on your unique needs while adhering strictly to industry regulations. Whether you require standard or custom-made products, our commitment remains unwavering—to deliver excellence every step of the way.
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