What type of signal is indicated by a raised arm in crane operation?

A raised arm in crane operation is a clear signal to "load up." This gesture is universally recognized in construction and crane operation settings. When the operator raises their arm, it indicates that the crane operator should prepare to lift a load. This signal helps maintain safety and coordination on the job site, ensuring that all workers understand that the crane is being prepared to hoist a load into the air.

Other signals in crane operation serve different purposes, such as moving slowly or performing stops, but the raised arm specifically communicates readiness to lift. This is vital for the effective communication between the ground crew and the crane operator, contributing to safety and efficiency on the worksite.