Signalperson Duties & Standard Hand Signals
ASME B30.5-2025 standard hand signals for hoist, lower, boom, swing, travel, stop, and dog everything commands.
- Describe the signalperson role and ASME B30.5-2025 standards
- Demonstrate standard hand signals for hoist, lower, and stop
- Identify hand signals for boom up, boom down, swing, and travel
- Explain dog everything, emergency stop, and special signal procedures
Lesson 1
Signalperson Role & ASME Standards
Who Needs a Signalperson?
A signalperson is required whenever the crane operator cannot see the load, the load path, or the landing zone. OSHA requires a signalperson when:
- The operator's view is obstructed
- The load is being moved near structures, power lines, or other hazards
- The site safety plan requires one
- Equipment or personnel could be endangered without signal guidance
Signalperson Qualifications
A qualified signalperson must:
- Know and demonstrate all standard hand signals
- Understand the crane operations being directed
- Maintain clear line of sight to both the operator and the load
- Wear high-visibility clothing
- Have no other duties during signaling
The Single Designee Rule
Only one signalperson may direct crane movements at any time. If a second signalperson needs to take over, there must be a clear transfer of responsibility communicated to the operator. The operator follows signals from only the designated signalperson.
Key Exam Concept
The signalperson's main duty is to provide clear signals to the operator when the view is obstructed or required. Anyone can give a stop signal, but only the designated signalperson directs crane movements.
A signalperson provides clear signals to the operator when the view is obstructed. Only one designated signalperson may direct crane movements at a time, and the operator must obey a stop signal from anyone.