Cranes Selection Guide
As per Indian Standard Specifications 807 and 3177 Cranes have basically divided into four Classes.
Class - I Light Duty
These are normal maintenance cranes which are not constant use. Cranes for periodical maintenance of plant and machinery come under this category. These type of cranes are required for maximum 1000 working houses per annum. Their speed are slow and the structures are light.
Class - II Medium Duty
This class perhaps covers the largest number of cranes used by the industry, in workshop, Foundries, Processing plants, important ware-houses and infact every area where are fair degree of activity exists. These cranes are designed for maximum 2000 working hours per annum.
Class - III Heavy Duty
For workshop and production shops, where the cranes, in addition to normal handling work, also become a part of production process by helping production particularly in those workshops which run 2/3 shifts per day. The total working load on the cranes is about 3000 hours per annum.
Class - IV Extra Heavy Duty
This class includes very special cranes of highest importance in steel industry, cement industry, important strong houses and in some other selected industries. These are for continuous duty operation.