What does a boom angle indicator measure?

A boom angle indicator serves a critical function in crane operations by measuring the angle of the boom base section in relation to horizontal. Accurate measurement of this angle is essential for ensuring safe lifting procedures, as it directly impacts the crane's stability and the load's reach. By knowing the boom angle, operators can make informed decisions regarding the weight capacity and the safe positioning of the load. This information helps prevent accidents that could result from overextending the boom or operating at an unsafe angle.

The indicator does not measure the height of the boom above the ground, as that would require different measuring tools or methods. It also does not provide information on the weight of the objects being lifted or the distance between the load and the crane, which are equally important metrics in crane operation but served by other instruments and calculations specific to load management and crane safety protocols. By primarily focusing on the boom angle, the indicator plays a vital role in promoting safe operational practices in construction environments.