What does the term "catenary" refer to in rigging?

The term "catenary" specifically refers to the curve that is formed by a rope or cable when it is suspended and allowed to hang freely under its own weight. This concept is essential in rigging, as it impacts how loads are distributed and how ropes behave when loaded.

Understanding the shape of the catenary is crucial for riggers because it helps in calculating forces and ensuring that the rigging system operates safely and efficiently. When a line is not under tension, it does not form a straight line; instead, it creates a natural arch or curve due to gravity, which can affect the dynamics of a load during a performance or a lift.

This knowledge assists rigging professionals in making informed decisions during setup, particularly in determining the lengths of lines required, the position of anchor points, and the overall stability of the rig configuration. It also plays a significant role in determining how much sag occurs in a rigging system, which can influence the safety and effectiveness of the setup.