What factor primarily affects the capacity of a sling?

The capacity of a sling is primarily affected by the material of the sling. Different materials have distinct strength characteristics, which determine how much weight a sling can safely support. For instance, slings made from synthetic fibers, such as nylon or polyester, will have different load capacities compared to those made from steel or chain. Each material has a specific working load limit (WLL), which is critical for ensuring safe lifting practices.

While the other factors, such as length, width, and color, can influence aspects of rigging, they do not have the same direct impact on the sling’s capacity. The length can affect how the force is distributed but does not change the intrinsic strength of the material. Width may influence the contact area and help reduce wear but does not fundamentally alter the load-bearing capability of the sling material itself. The color is merely a visual aspect and does not contribute to the sling's strength or capacity. Understanding the significance of the sling’s material is vital for ensuring safety and compliance in rigging operations.