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. 408.11843 - Controls

(1) A pendant, radio, cab, pulpit control station, and a controller in a cab operated crane shall be permanently identified by function and direction. Control boxes shall be constructed to prevent electrical shock.

(2) Rope controls for a floor-operated crane shall be equipped with an arrow attached to the rope showing the direction of travel when the rope is pulled.

(3) A pendant, radio, cab, or pulpit control station shall be equipped with a positive stop device, colored red, to disconnect all motors.

(4) A crane shall be equipped with a main switch which can be locked out. An employer shall establish a written lockout procedure which shall be used in connection with R 408.11872 and R 408.11875. Lockout shall conform to the requirements prescribed in General Industry Safety Standard Part 85 "The Control of Hazardous Energy Sources, (Lockout/Tagout)," as referenced in R 408.11807.

(5) A controller on a rope, pendant, or radio-controlled crane, when released from the "on" position, shall automatically return to the "off" position.

(6) A transmitter for a radio-controlled crane shall be stored in a locked cabinet or in a supervised storage area when not in use.

(7) All cranes shall have an operable over-travel limit switch in the hoisting direction. The switch shall be located so that it is tripped under all conditions to prevent contact of the hook or block with the hoist.

(8) A crane that is not equipped with spring return controllers or momentary contact push buttons shall have a device which will disconnect all motors from the line if power fails and which will not permit restarting until the controller handle is brought to the off position or a reset switch or button is operated.

(9) The control circuit voltage shall not be more than 600 volts for A.C. or D.C. current.

(10) The voltage at pendant push-buttons shall not be more than 150 volts for A.C. and 300 volts for D.C.

(11) If multiple conductor cable is used with a suspended push-button station, then the station shall be supported in a manner that will protect the electrical conductors against strain.

(12) Cab-operated cranes shall have lever-operated manual controllers and master switches that have a spring-return arrangement, off-point detent, or off-point latch. The controller operating handle shall be located within reach of the operator and, as far as practicable, the movement of each controller handle shall be in the same general directions of the resultant movements of the load.

(13) Equipment and wiring shall be as prescribed in General Industry Safety Standard Part 39 "Design Safety Standards for Electrical Systems," as referenced in R 408.11807.

(14) The control for the bridge and trolley travel shall be located so that the operator can face the direction of travel.

(15) Push buttons in pendant stations shall return to the above position when released by the operator.

(16) Automatic cranes shall be designed so that all motions will failsafe if any malfunction of operation occurs.

(17) A remote-operated crane shall function so that if the control signal for any crane motion becomes ineffective, the crane motion shall stop.