Examples of American National Standards Institute, or ANSI, crane hand signals include the emergency stop, use main hoist, raise boom and lower boom, according to Rigger.com. Other hand signals include raise the boom and lower the load, use auxiliary hoist and cease all activity.
ANSI hand signal standards are used pursuant to an Occupational Safety & Health Administration mandate, which requires that all crane and derrick operation must be applied using ANSI standards, explains Rigger.com. The standards apply to eighteen specific signals that display the signaler’s hand, finger, arm and body location. Guidelines require that signalmen be properly qualified to employ hand signals, only use standard signals and be in clear view of the crane operator. Although ANSI standards are not mandatory, they are essentially universally accepted in the crane operating industry.