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No. of operating cycles for required service life

No of operating days in a year

$ hoist_{days} = 250 \; \;
days $

Service life in years

$ hoist_{years} = 25 \; \;
years $

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formula syntax

crane_{cycles} = hoist_{cycles_{day}} * hoist_{days} * hoist_{years}

Class of utilisation for the crane as a whole

Class of utilisation | Max. number of operating cycles | Remarks |

U1 | 3.2 x 10^{4} | Infrequent use |

U2 | 6.3 x 10^{4} | Infrequent use |

U3 | 1.25 x 10^{5} | Infrequent use |

U4 | 2.5 x 10^{5} | Fairly frequent use |

U5 | 5 x 10^{5} | Frequent use |

U6 | 1 x 10^{6} | Very frequent use |

U7 | 2 x 10^{6} | Continuous or near continuous use |

U8 | 4 x 10^{6} | Continuous or near continuous use |

U9 | > 4 x 10^{6} | Continuous or near continuous use |

Discipline: mechanical