Harrington Hoists EAC900 User Manual
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G l o s s a r y o f C o m m o n C r a n e Te r m s :
Adjustable brakes: Electro-mechanical device to control
horizontal crane deceleration.
Bridge beam: Traveling beam connected to end trucks -
supports trolley hoist and load.
Bumpers: Energy absorbing device mounted on end
trucks or trolley that reduces impact when the truck or trolley
contacts either its end stop or another truck or trolley.
Capacity: Maximum rated load which a crane is designed to
carry. Commonly expressed in Tons. (1 Ton = 2,000 lbs.).
Drop stops: Means to limit the drop of a bridge or trolley in
case of wheel or axle failure.
Electronic Acceleration Control (EAC): Electronic control
for adjusting rate of crane acceleration; also known as
Electronic Soft Start.
End truck: Load-bearing crane component that supports the
bridge beam and consists of a frame, wheels, axles, etc.
Festooning: Wiring and support system that delivers power to
trolley hoist across bridge or runway beam.
horizontal crane deceleration.
Bridge beam: Traveling beam connected to end trucks -
supports trolley hoist and load.
Bumpers: Energy absorbing device mounted on end
trucks or trolley that reduces impact when the truck or trolley
contacts either its end stop or another truck or trolley.
Capacity: Maximum rated load which a crane is designed to
carry. Commonly expressed in Tons. (1 Ton = 2,000 lbs.).
Drop stops: Means to limit the drop of a bridge or trolley in
case of wheel or axle failure.
Electronic Acceleration Control (EAC): Electronic control
for adjusting rate of crane acceleration; also known as
Electronic Soft Start.
End truck: Load-bearing crane component that supports the
bridge beam and consists of a frame, wheels, axles, etc.
Festooning: Wiring and support system that delivers power to
trolley hoist across bridge or runway beam.
C o m p l i a n c e
In order to meet requirements of the Crane Manufacturers Association of America (CMAA),
the National Electric Code (NEC) and the American National Standards Institute (ANSI/ASME),
Harrington cranes include:
the National Electric Code (NEC) and the American National Standards Institute (ANSI/ASME),
Harrington cranes include:
• Thermal protection for all motors.
• Stationary crane wires that are enclosed in conduit.
• Rubber bumpers for crane and powered trolleys.
• Hoists load tested to 125% of rated capacity.
• Drop stops for cranes.
• Rail sweeps for top running and underhung cranes.
• Stationary crane wires that are enclosed in conduit.
• Rubber bumpers for crane and powered trolleys.
• Hoists load tested to 125% of rated capacity.
• Drop stops for cranes.
• Rail sweeps for top running and underhung cranes.
Rail sweeps: Device designed to clear obstructions from
wheel running surface.
Runway beam: Stationary beams that support crane
and load. Commonly fabricated from S or W beams or
patented track.
Runway electrification: Delivers power to crane as it travels
along runway.
Span: Dimension from one runway centerline to the other
runway centerline.
System max wheel load: Maximum load exerted on runway
beams for a crane loaded to its rated capacity. It occurs when
trolley hoist is located at its maximum end approach and
includes an allowance for vertical inertial forces associated
with electric hoists. This value is expressed for Series 3
cranes as lbs/wheel for top running and lbs/wheel pair for
underhung cranes. For Series HPC 500 cranes, both top
running and underhung are lbs/wheel pair.
Top running: Crane type that travels on top of rail or bar
attached to runway beams.
Underhung: Crane type that travels on the lower flange of
runway beams.
wheel running surface.
Runway beam: Stationary beams that support crane
and load. Commonly fabricated from S or W beams or
patented track.
Runway electrification: Delivers power to crane as it travels
along runway.
Span: Dimension from one runway centerline to the other
runway centerline.
System max wheel load: Maximum load exerted on runway
beams for a crane loaded to its rated capacity. It occurs when
trolley hoist is located at its maximum end approach and
includes an allowance for vertical inertial forces associated
with electric hoists. This value is expressed for Series 3
cranes as lbs/wheel for top running and lbs/wheel pair for
underhung cranes. For Series HPC 500 cranes, both top
running and underhung are lbs/wheel pair.
Top running: Crane type that travels on top of rail or bar
attached to runway beams.
Underhung: Crane type that travels on the lower flange of
runway beams.