The Definition of Qualified Signal Person

Definition of Qualified Signal Person

A qualified signal person is the worker who communicates with a crane or derrick operator, using hand, voice or audible signals, when the operator cannot see the load or the area where it is traveling. Under OSHA's crane standard (29 CFR 1926.1428), anyone who gives signals to a crane operator on a construction site must be qualified, either through a qualified third-party evaluator or through the employer's own qualified evaluator.

The signal person is the operator's eyes. They watch the load, the rigging, nearby workers and obstructions, and they direct every movement. A misunderstood signal can swing a load into a worker or a power line, so OSHA treats signaling as a skill that must be proven, not assumed.

Key Facts About Qualified Signal Persons

• A signal person is required when the operator's view of the load or travel path is obstructed, or when either the operator or person handling the load decides one is needed for safety.
• To be qualified, the signal person must know and understand the signals, be competent in applying them, have a basic understanding of crane operation and limitations, and pass an oral or written test plus a practical test.
• Documentation of the qualification must be available at the site.
• Standard hand signals follow the ANSI B30 series and are shown in Appendix A of the OSHA crane standard. Non-standard signals must be agreed in advance.
• Only one person gives signals at a time, except that anyone can give an emergency stop signal.

Example of a Qualified Signal Person

A tower crane is lifting HVAC units onto a roof that the operator cannot see from the cab. A qualified signal person on the roof uses a dedicated radio channel to guide the load down, keeps workers clear of the landing zone and calls a stop when a gust of wind starts the unit spinning.

How to Qualify Signal Persons

1. Determine which lifts on your sites need a signal person based on visibility and the lift plan.
2. Train signal persons on standard hand signals, voice signal procedures and basic crane limitations.
3. Have each candidate pass a written or oral test and a practical demonstration with a qualified evaluator.
4. Keep qualification documents on site and confirm them before the lift.
5. Agree on the signal method, radio channel and emergency stop procedure at the pre-lift meeting.

Related Terms

• Qualified Rigger
• Qualified Person
• Lift Plan
• Overhead Crane Safety
• Struck-By Hazard

Qualified Signal Person Frequently Asked Questions

When is a signal person required?

OSHA requires a signal person when the point of operation is not in full view of the operator, when the operator's view in the direction of travel is obstructed, or when the operator or the person handling the load decides it is necessary for safety.

Can any worker give an emergency stop signal?

Yes. Only the designated signal person directs normal crane movements, but the operator must obey a stop or emergency stop signal from anyone.

Do signal persons need a certification card?

OSHA requires qualification by a third-party evaluator or the employer's qualified evaluator and documentation of that qualification on site. A wallet card from a recognized program is a common way to show it, but the standard does not require a specific card.

What signals can be used?

Hand signals must follow the standard method in the OSHA crane standard. Voice signals by radio are also allowed when the operator, signal person and crew agree on the procedure beforehand and use a dedicated channel.