H a r r i n g t o n c o m p l e t e C r a n e s
Crane Ser vice 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.
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