What material is often used in the construction of lift lines and flying lines in rigging systems?

Steel wire rope is commonly used in the construction of lift lines and flying lines in rigging systems due to its exceptional strength and durability. This type of rope can withstand heavy loads and is less likely to stretch under tension compared to other materials, which is critical in a lifting and rigging context where safety and reliability are paramount. The construction of steel wire rope involves multiple strands of steel wire twisted together, which enhances its tensile strength and makes it suitable for high-stress applications typically encountered in theatre rigging.

While polyester and nylon ropes are versatile and can be used in various applications, they do not offer the same level of load capacity or resistance to environmental factors such as UV exposure and moisture as steel wire rope. Manila rope, made from natural fibers, is also less durable and can suffer from wear and tear more quickly under heavy load scenarios, making it unsuitable for high-stakes lifting operations where safety is critical.