In crane operations, clear communication is everything. When the operator’s view is limited, the signal person becomes their eyes and ears. OSHA requires that a qualified signal person be assigned any time a crane is operating where visual or communication challenges exist.

Qualification Requirements

1. Know and Understand the Signals Used
2. A qualified signal person must understand the type of signals used on site, including hand signals, voice commands, or radio communication, depending on job conditions.
3. Be Competent in Applying Signals
4. Knowing the signals is not enough. The signal person must use them correctly and consistently to prevent confusion or unsafe movements. Accurate communication keeps operations efficient and workers safe.
5. Understand Crane Operation and Limitations
6. The signal person must have a basic understanding of crane functions, load limits, and how movements such as boom deflection can affect safety. This awareness helps them anticipate hazards and guide the operator effectively.
   

These requirements apply to construction activities involving cranes, derricks, and powered industrial trucks configured to lift or lower with a winch or hook.

A Qualified Signal Person Is Required When

1. The Point of Operation Is Not Visible to the Operator
2. If the operator cannot see the load or work area, a signal person must guide movements and confirm safe positioning.
3. The Operator’s View of Travel Is Obstructed
4. When structures, equipment, or terrain block visibility, a signal person directs movement and helps prevent collisions.
5. Site-Specific Conditions Create Additional Hazards
6. Certain job sites present unique challenges such as uneven terrain, confined spaces, or high pedestrian activity. A qualified signal person ensures safety under these conditions.
7. When Working Near Energized Power Lines
8. A dedicated spotter must be used, and that person must also be qualified as a signal person. This ensures the crane maintains safe clearance distances and complies with OSHA electrical safety standards.
   

Maintaining Clear Communication

Only one designated person should give signals to the operator. The crane operator must ignore signals from anyone else. Communication between the operator and signal person must remain continuous during crane movement. If communication is lost at any point, all crane operations must stop until it is safely restored.

The Final Lift

The signal person is a critical link in safe crane operations. By understanding OSHA requirements, applying proper hand signals, and maintaining clear communication, crane crews can prevent accidents before they happen. Every lift depends on trust, attention, and teamwork. How clear is your team’s communication on today’s job?