What is a calibrated scale used for in the context of rigging?

A calibrated scale is an essential tool in rigging for accurately measuring the weight of a load. Understanding the weight of the load is crucial for several reasons, including ensuring safety and stability during lifting operations. By knowing the precise weight, riggers can make informed decisions about the type of lifting equipment to use and whether they need to account for additional factors, such as load distribution and environmental considerations.

Using a calibrated scale helps prevent overloading cranes, hoists, and other lifting devices, which can lead to equipment failure or accidents. Additionally, accurate weight measurements inform rigging calculations necessary for selecting the right rigging gear, such as slings and hooks, ensuring that all components can safely handle the load.

In contrast, other options refer to devices that either perform different functions, such as lifting or adjusting machinery, but do not specifically focus on the accurate measurement of weight, which is the primary purpose of a calibrated scale in rigging contexts.