Used to determine crane mechanism classification
State of loading for the crane as a whole.
State of loading | Nominal load spectrum factor, Km | Descriptive definition |
L1 Light | 0.5 | Mechanisms subjected very rarely and normally light loads |
L2 Modarate | 0.63 | Mechanisms occasionally subjected to their maximum load, but normally to rather light loads |
L3 Heavy | 0.8 | Mechanisms frequently subjected to their maximum load and normally to loads of medium magnitude |
L4 Very Heavy | 1 | Mechanisms regularly subjected to their maximum load |
Load spectrum factor can be calculated using the following method.
P1 - load corresponding to operating time t1
Pmax - rated load
t1 , t2 , etc. - operating time for individual loads P1 ,P2 , etc.
T - total operating time