specification IS:807 & IS:3177. The cranes have been basically divided
into four classes. These classes are based on application and duty cycle.
CLASS-I Light Duty
Where service requirements are infrequent this type of low maintenance cranes
are used. Light duty cranes for repair shops, light warehouse.
CLASS-II Medium Duty
The largest number of cranes used in all industries. Medium duty cranes are used for
foundries, processing plants, machine shop and general industrial purposes and outdoor
CLASS-III Heavy Duty
Heavy Duty cranes for workshop, production shop, machine shop, steel warehouse, heavy
fabrication shop, paper mills, etc. where the cranes in addition to normal handling work also become a
part of production process.
CLASS-IV Extra Heavy Duty
Extra Heavy Duty cranes includes very special cranes with highest importance in steel industries and heavy
machineries. These are for continuous duty operation. Cranes designed for hot metal application.
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