Title 29 CFR 1910.179(i), warning devices, states: [e]xcept for floor operated cranes a gong or other effective warning signal shall be provided for each crane equipped with a power traveling mechanism. Although the source of 29 CFR 1910.179 did not provide specific examples of an "effective warning signal," ANSI standard B30.2-1967, Overhead and Gantry Cranes, a subsequent revision of this standard, ASME B30.2-2005, Overhead and Gantry Cranes 2-1.15.3 Types of Devices, states that [one]ne or more of the following devices shall be provided when require:
source:https://www.osha.gov/laws-regs/standardinterpretations/2010-03-30
- Manually operated gong
- Power-operated bell, siren, or horn
- Rotating beacon
- Strobe light
source:https://www.osha.gov/laws-regs/standardinterpretations/2010-03-30