No. of operating cycles for required service life
Class of utilisation for the crane as a whole
Class of utilisation | Max. number of operating cycles | Remarks |
U1 | 3.2 x 104 | Infrequent use |
U2 | 6.3 x 104 | Infrequent use |
U3 | 1.25 x 105 | Infrequent use |
U4 | 2.5 x 105 | Fairly frequent use |
U5 | 5 x 105 | Frequent use |
U6 | 1 x 106 | Very frequent use |
U7 | 2 x 106 | Continuous or near continuous use |
U8 | 4 x 106 | Continuous or near continuous use |
U9 | > 4 x 106 | Continuous or near continuous use |