Which materials are typically NOT recommended for rigging slings due to limited load capacity?

Natural fibers like manila rope are typically not recommended for rigging slings primarily due to their limited load capacity and inherent properties. Manila rope, while strong and traditionally used in various applications, is subject to several limitations, such as susceptibility to moisture, UV degradation, and wear over time. These factors can significantly reduce its overall strength and durability, making it unreliable for demanding rigging applications where high strength and safety are critical.

In contrast, materials like polyester webbing and steel cables are specifically designed for rigging and load-bearing applications, providing higher strength-to-weight ratios and greater durability. Nylon ropes have good elasticity but are often less preferred compared to synthetic slings made of polyester due to their potential for stretch and lower abrasion resistance. Understanding these properties is essential for ensuring safety and effectiveness in rigging practices.