Harrington Hoists EAC700 Manual

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Harrington complete cranes

Crane Service Classifications:

Crane Service Class:

• TheCraneManufacturersAssociationofAmerica(CMAA)hasestablishedsixserviceclasses

forcranes.TheseclassesareClassAthroughClassF,andarebasedonloadcyclesand

loadmagnitude.ClassAcranesaresuitedfortheleastsevereservice,andClassFcranesare

suitedforthemostsevereservice.

Class C Service Class:

TheloadcycleandmagnitudecombinationsthatdefinetheClassCServiceClassare:

• Loadisusuallybetween1/3and2/3ofratedcapacityandisfrequentlyequaltorated

capacity,anddesignservicelifeis20,000to100,000cycles.

• Loadisusually1/3ofratedcapacityandisrarelyequaltoratedcapacity,anddesignservice

lifeis100,000to500,000cycles.

• Loadisusuallyverylightandrarelyisequaltoratedcapacity,anddesignservicelifeis

500,000to2,000,000cycles.

Class B Service Class:

TheloadcycleandmagnitudecombinationsthatdefinetheClassBServiceClassare:

• Loadisusually1/3ofratedcapacityandisrarelyequaltoratedcapacity,anddesignservice

lifeis20,000to100,000cycles.

• Loadisusuallyverylightandrarelyisequaltoratedcapacity,anddesignservicelifeis

200,000to500,000cycles.