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A crane operator should always move loads according to the established code of signals, and use a signaler. Hand signals are preferred and commonly used. A signaler may be required by law if the operator's view of the intended path of travel is obstructed.
The signaler must:
Hoist: With forearm vertical, forefinger pointing up, move the hand in a small horizontal circle.
Lower: With an arm extended downward, forefinger pointing down, move the hand in small horizontal circles.
Multiple Trolleys: Hold up one finger for block marked "1" and two fingers for a block marked "2." Regular signals follow.
Bridge Travel: Arm extended forward, hand open and slightly raised, make a pushing motion in direction of travel.
Trolley Travel: Palm up, fingers closed, thumb pointing in direction of motion, jerk the hand horizontally.
Stop: Arm extended, palm down, hold the position rigidly.
Emergency Stop: Arm extended, palm down, move the hand rapidly right and left.
Magnet Is Disconnected! : Crane operator spreads both hands apart, palms up.
Dog Everything: Clasp hands in front of the body. Means PAUSE. This signal can be used on potentially risky occasions such as when it has started raining, when the load doesn't fit the space for which it was planned, or when a bystander gets too close to the action.
Use Main Hoist: Tap fists on head; then use regular signals.
Use Whip Line (Auxiliary Hoist): Tap elbows with one hand; then use regular signals.
Raise Boom: Arm extended, fingers closed, thumb pointing upward.
Lower Boom: Arm extended, fingers closed, thumb pointing downward.
Swing: Point with a finger in direction of swing of a boom.
Raise the Boom and Lower the Load: Arm extended, fingers closed, thumb pointing upward, other arm bent slightly with forefinger pointing down and rotate hand in horizontal circles.
Lower the Boom and Raise the Load: Arm extended, fingers closed, thumb pointing downward, other arm with forearm vertical, forefinger pointing upward and rotate the hand in horizontal circles.
Move Slowly: Use one hand to give any motion signal and place the other hand motionless in front of the hand giving the motion signal. (Hoist Slowly shown as example.)
Retract Boom (Telescoping Booms): Both fists in front of body with thumbs pointing toward each other.
Extend Boom (Telescoping Booms): Both fists in front of body with thumbs pointing outward.
Turn Travel Track: this side in direction shown by revolving fist.
Travel Both Tracks: forward or backward by revolving fists.
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Although every effort is made to ensure the accuracy, currency and completeness of the information, CCOHS does not guarantee, warrant, represent or undertake that the information provided is correct, accurate or current. CCOHS is not liable for any loss, claim, or demand arising directly or indirectly from any use or reliance upon the information.