Harrington Hoists EAC800 Saw User Manual


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Glossary of Common Crane Terms:
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.
Compliance
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:
• 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.
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.
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