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- Crane classification
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$cycles_{hour} = $

Integers or decimals only. Maximum 10 characters

Minimum value = 0.001

$K_{p_{crane}} = $

Integers or decimals only. Maximum 10 characters

Minimum value = 0.001

State of loading for the crane as a whole.

State of loading | Nominal load spectrum factor, K_{p} | Descriptive definition |

Q1 Light | 0.5 | Cranes that hoist the safe working load very rarely and normally light loads |

Q2 Modarate | 0.63 | Cranes that hoist the safe working load fairly frequently ang normally moderate loads |

Q3 Heavy | 0.8 | Cranes that hoist the safe working load frequently ang normally heavy loads |

Q4 Very Heavy | 1 | Cranes that a normally loaded close to safe working load |

Load spectrum factor can be calculated using the following method.

P_{1} - load corresponding to cycle C_{1}

P_{max }- rated load

C_{1 }, C_{2 }, etc. - No. of cycles which occur at individual lifted loads P_{1 },P_{2 }, etc.

C_{t }- total No. of cycles

$hook_{cycles} =
$

Integers or decimals only. Maximum 10
characters

Minimum value = 0.001

$hook_{travel} =
$
$m$

Integers or decimals only. Maximum 10
characters

Minimum value = 0.001

$hours_{operating} =
$
$h$

Integers or decimals only. Maximum 10
characters

Minimum value = 0.001

$v_{hoist} =
$
$m / min$

Integers or decimals only. Maximum 10
characters

Minimum value = 0.001

Hoist motion hours per day

$$ hoist_{hours_{day}} = {{( hook_{cycles} \cdot hook_{travel} \cdot cycles_{hour} \cdot hours_{operating} ) \over \left({ v_{hoist} \cdot 60 }\right)}} $$

Hoist motion cycles per day

$$ hoist_{cycles_{day}} = {hoist_{hours_{day}} \cdot cycles_{hour}} $$

$hoist_{days} =
$
$days$

Integers or decimals only. Maximum 10
characters

Minimum value = 0.001

$hoist_{years} =
$
$years$

Integers or decimals only. Maximum 10
characters

Minimum value = 0.001

Total service cycles

$$ crane_{cycles} = {hoist_{cycles_{day}} \cdot hoist_{days} \cdot hoist_{years}} $$

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 |

Group classification as a whole

State of loading | K_{p} | U1 | U2 | U3 | U4 | U5 | U6 | U7 | U8 | U9 |

Q1 Light | 0.5 | A1 | A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 |

Q2 Moderate | 0.63 | A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A8 |

Q3 Heavy | 0.8 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A8 | A8 |

Q4 Very Heavy | 1 | A3 | A4 | A5 | A6 | A7 | A8 | A8 | A8 | A8 |

$Crane\;class = $

Integers or decimals only. Maximum 10 characters

Minimum value = 0.001