6/22/2016
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 |
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# Lifts per/hr. |
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Typical Installation |
Shift |
Typical Workload |
Key Points |
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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 |
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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 |
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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 |
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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. |
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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. |
