20 IMT Electric-Hydraulic Crane Operation & Safety Manual # 99903618
Hand Signals
Hand signals can be used to communicate between crane operators and assistants when the
job site noise level is too high to communicate in other ways.
Signals to the operator shall follow ASME B30.5 standards, unless voice communication is
utilized. Signals shall be discernible or audible at all times. No response by the operator is to be
made unless the signal is clearly understood.
For operations not covered by the ASME hand signals, additions to or modifications may be
made. These special signals must be agreed upon by the operator and signal person before the
crane is operated.
If verbal instructions are required rather than hand signals, all crane motions must be stopped
before doing so. Figure includes an illustration of the hand signal, the operation associated with
the signal, and a description of the signal. The operator and signal person must review these
signals and agree to their use before implementation. For complete hand signal information,
refer to ASME/ANSI B30.5 - Mobile and Locomotive Cranes, published by the American Society
of Mechanical Engineers.
The hand signals presented by The American Society of Mechanical Engineers have been
accepted by the Occupational Safety and Health Administration (OSHA).
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