Michigan Administrative Code
Department - Labor and Economic Opportunity
MIOSHA
General Industry and Construction Safety and Occupational Health Standards
General Industry Safety Standards
Part 18 - OVERHEAD AND GANTRY CRANES
CONSTRUCTION, INSTALLATION AND EQUIPMENT
Section R. 408.11845 - Warning devices

(1) A crane, shall be equipped with a warning device, such as a flashing light, horn, bell, or siren. An operator shall use a warning device before starting and intermittently while traveling in an occupied area.

(2) A wind-indicating device shall be provided on an outdoor storage gantry type crane and on an outdoor overhead crane. The device shall give a visual or audible alarm to the operator at a predetermined wind velocity to be determined by the employer in accordance with the manufacturer's recommendation or design.