OSHA spotter hand signals for crane and derrick work are set out in Appendix A to Subpart CC of 29 CFR Part 1926, and every qualified signal person must know them by memory. The signals cover four things the operator needs to hear from the ground: raise or lower the load, move the boom, swing the superstructure, and stop. They are designed to read clearly at a distance and to leave no room for interpretation when voice communication is not practical.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
When a Signal Person Is Required
You do not need a signal person for every lift. OSHA requires one in three situations. The point of operation, meaning the load’s travel path or the area near where it will land, is not in the operator’s full view. The equipment is traveling and the operator’s view in the direction of travel is obstructed. Or the operator or the person handling the load decides that site conditions make a signal person necessary for safety.2Occupational Safety and Health Administration. 29 CFR 1926.1419 – Signals General Requirements That third trigger is deliberately broad. Anyone involved in the lift can call for a signal person if something looks wrong.
Standard Hand Signals for Load Movement
The most frequently used signals control the hoist line.
- Hoist (raise the load): forearm vertical, index finger pointing up, hand moving in a small horizontal circle.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
- Lower the load: arm extended downward, index finger pointing down, hand moving in a small horizontal circle.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
- Use main hoist: tap your fist on the top of your head, then give the next action signal.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
- Use whipline (auxiliary hoist): tap your elbow with the opposite hand, then give the regular signal.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
Boom and Swing Signals
Boom signals move the crane’s structural arm rather than the load line, and the swing signal rotates the superstructure.
- Raise boom: arm extended horizontally to the side, fist closed, thumb pointing up.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
- Lower boom: same position, thumb pointing down.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
- Raise boom and lower load: arm to the side, thumb up, fingers opening and closing repeatedly.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
- Lower boom and raise load: same motion, thumb down, fingers opening and closing.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
- Swing: arm extended horizontally, index finger pointing in the direction the boom should rotate.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
Direction is always given from the operator’s perspective, not the signal person’s. If you want the boom to move to your left and that is the operator’s right, signal right. Reversing this is a common early mistake.2Occupational Safety and Health Administration. 29 CFR 1926.1419 – Signals General Requirements
Stop, Slow, and Hold Signals
These are the signals that prevent accidents once the load is moving.
- Stop: one arm extended horizontally to the side, palm down, hand sweeping back and forth.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
- Emergency stop: both arms extended horizontally, palms down, both hands sweeping back and forth. Using both arms is what distinguishes this from a routine stop, and it means cease all movement immediately.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
- Dog everything (hold): hands clasped together at waist level. Stop all functions and hold position.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
- Move slowly: place one hand motionless in front of the hand giving any action signal. For a slow hoist, one hand stays still while the other makes the hoist circle. The stationary hand is the universal modifier for reduced speed.1Occupational Safety and Health Administration. 29 CFR 1926 Subpart CC Appendix A – Standard Hand Signals
When Radio or Voice Signals Are Used Instead
Hand signals are not the only permitted method. OSHA allows radio, telephone, or other electronic transmission, but the equipment has to be tested on site before operations begin to confirm signals come through clearly. The transmission must use a dedicated channel so unrelated traffic does not interfere with lift commands. Multiple cranes and signal persons coordinating together may share a channel. The operator must receive signals through a hands-free system so both hands stay on the controls.3Occupational Safety and Health Administration. 29 CFR 1926.1420 – Signals Radio, Telephone or Other Electronic Transmission of Signals
Voice signals follow a three-part structure: the function and direction first (for example, “boom up”), then the distance or speed, then a stop command when the movement is complete.4Occupational Safety and Health Administration. 29 CFR 1926.1421 – Signals Voice Signals Additional Requirements Hand signals remain the most common choice when line of sight is clear, because they need no equipment and work when radios fail.
Continuous Communication Between Signal Person and Operator
Whichever method is used, communication has to be unbroken. If it is interrupted for any reason, the operator must safely stop all movement requiring signals and hold the equipment still until the connection is restored and a proper signal is given and understood.2Occupational Safety and Health Administration. 29 CFR 1926.1419 – Signals General Requirements There is no grace period. A momentary gap triggers the stop.
Only one person may give signals to a crane at a time. If the operator spots a safety problem, the operator stops and does not resume until the operator and signal person agree the issue is resolved.2Occupational Safety and Health Administration. 29 CFR 1926.1419 – Signals General Requirements Two people waving conflicting commands is the kind of confusion that causes fatalities.
Qualification and Documentation
Anyone directing a crane on site must be a qualified signal person. OSHA does not require certification from a national body. It requires the employer to verify competence through an oral or written test plus a practical skills test showing the person can actually perform the signals under working conditions.5Occupational Safety and Health Administration. 29 CFR 1926.1428 – Signal Person Qualifications
The qualification covers four areas: knowledge of the standard hand signals (or whichever signaling method will be used), competence in applying them, a basic understanding of equipment operation and limitations including how loads behave during swinging, stopping, and boom deflection, and knowledge of the relevant OSHA communication requirements.5Occupational Safety and Health Administration. 29 CFR 1926.1428 – Signal Person Qualifications
Evaluation can come from a third-party qualified evaluator or from the employer’s own qualified evaluator. Either way, the documentation has to be available on site while that signal person is working, and it must state which methods the person is qualified for, whether hand signals, radio, or both.5Occupational Safety and Health Administration. 29 CFR 1926.1428 – Signal Person Qualifications Missing or incomplete documentation is one of the most common crane-related OSHA citations. Inspectors look for it, and “we trained him but didn’t write it down” will not hold up.
Penalties for Signal Violations
OSHA classifies most signaling violations as serious, meaning the employer knew or should have known about a hazard that could cause death or serious injury. The current maximum penalty for a serious violation is $16,550 per violation. A willful or repeated violation reaches up to $165,514 per violation.6Occupational Safety and Health Administration. OSHA Penalties
These are per-violation maximums. On a site where several signal persons lack documentation, each one can be a separate violation. A failure-to-abate penalty of up to $16,550 per day can accumulate if the employer does not correct the problem after a citation is issued.6Occupational Safety and Health Administration. OSHA Penalties Beyond the fines, a citation creates a public record that can affect future contract bidding and insurance costs. Training and documentation are cheap. The consequences of skipping them are not.