Trolley and bridge brakes

This section also covers ergonomic considerations to help assure proper operation of equipment; for instance, a limit on the force required to apply a foot-operated brake.

OSHA 1910.179 Overhead & Gantry Cranes Regulations
The following excerpt taken directly from OSHA 1910.179.*

Control braking means

• A power control braking means such as regenerative, dynamic or countertorque braking, or a mechanically controlled braking means shall be capable of maintaining safe lowering speeds of rated loads.
• The control braking means shall have ample thermal capacity for the frequency of operation required by service.

Brakes for trolleys and bridges

• Foot-operated brakes shall not require an applied force of more than 70 pounds to develop manufacturer's rated brake torque.
• Brakes may be applied by mechanical, electrical, pneumatic, hydraulic, or gravity means.
• Where necessary brakes shall be provided with adjustment means to compensate for wear.
• The wearing surface of all brakedrums or discs shall be smooth.
• All foot-brake pedals shall be constructed so that the operator's foot will not easily slip off the pedal.
• Foot-operated brakes shall be equipped with automatic means for positive release when pressure is released from the pedal.
• Brakes for stopping the motion of the trolley or bridge shall be of sufficient size to stop the trolley or bridge within a distance in feet equal to 10 percent of full load speed in feet per minute when traveling at full speed with full load.
• If holding brakes are provided on the bridge or trolleys, they shall not prohibit the use of a drift point in the control circuit.
• Brakes on trolleys and bridges shall have ample thermal capacity for the frequency of operation required by the service to prevent impairment of functions from overheating.

Application for trolley brakes

• On cab-operated crane with cab on trolley, a trolley brake shall be required as specified under paragraph (f)(4) of this section.
• A drag brake may be applied to hold the trolley in a desired position on the bridge and to eliminate creep with the power off.

Application of bridge brakes

• On cab-operated cranes with cab on bridge, a bridge brake is required as specified under paragraph (f)(4) of this section.
• On cab-operated cranes with cab on trolley, a bridge brake of the holding type shall be required.
• On all floor, remote and pulpit-operated crane bridge drives, a brake of noncoasting mechanical drive shall be provided.

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