How to choose the crane working class

DATE : June22, 2016

Before purchasing a crane, you need to know what kind of crane working class is more suitable for your workshop or plant. With proper design and crane working class, the performance of your plant will make its best and energy consumption will be the lowest level. How to achieve the balance between cost and production? We have a simple table to tell you what kind of crane you may need.

Crane Classification	Typical Installation	# Lifts per/hr.	Shift	Typical Workload	Key Points
Class A Standby or Infrequent Service	Power Houses Public Utilites Turbine Rooms Motor Rooms Transformer Stations	0 - 2	Single Shift Operation	Precise handling at slow speeds with idle periods between lifts Capacity loads may be handled for initial installation of equipment and for infrequent maintenance	Maintenance crane in machine house Used only occasionally
Class B Light Service	Repair Shops Light Assembly Operations Light Warehousing	2 - 5	Single Shift Operation	Loads vary from no load to occasional full rated loads	Light service requirements Slow speed
Class C Moderate Service	Machine Shops Paper Mills Machine Rooms	5 - 10	Single Shift Operation	Average load is 50% of rated load 50% of less of the lifts are at the rated capacity	Minimum 1.15 service factor on bridge motion
Class D Heavy Service	Heavy Machine Shops Foundries Fabricating Plants Steel Warehouses Container Yards Lumber Mills Stanadard Duty Bucket & Magnet Operations	10 - 20	1 - 2 Shift Operation	Average loads approaching 50% are continuously handled 50% of less of the lifts are at the rated capacity	Minimum 1.3 service factor on bridge motion Lift the maximum capacity with 30% frequency Typically faster speeds over Class C Hoist is typically used in this type of application and is tailored towards a specific application with a heavy duty cycle to handle demanding needs.
Class E Severe Service	Magnet Bucket Magnet/Bucket Combo Scrap Yards Cement Mills Lumber Mills Fertilizer Plans Container Handling	20+	24/7 Continuously	Continuous use at/or near capacity	Minimum 1.75 service factor on bridge motion Continuously lifts at the maximum capacity Typically faster speeds over Class C and D Hoist is typically used in this type of application and is tailored towards a specific application with a heavy duty cycle to handle demanding needs.

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