How to determine the crane working system

Working system is related to mechanical lift. When you choose crane, you should select corresponding crane FEM working system according to the real working condition, so as to make your investment more reasonable .Before you choose FEM working system, two aspects need to be considered: load type(scope of load bearing) (K) and daily average operating time (Tm)

I) load type (scope of load bearing) (K)

Light duty.

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Light Type (K≤0.5) Occasionally lifting with full load,   usually lifting with light load, fixed load is low.
Middle Type (0.5<K≤0.63) Occasionally lifting with full load,   usually lifting with light load, fixed load is in average.
Heavy Type (0.63<K≤0.8) Occasionally lifting with full load,   usually lifting with average weight load, fixed load is in heavy.
Extra Heavy Type (0.8<K≤1) Usually lifting with heavy load, fixed   load is in heavy.