8.2 EFFICIENCY FACTOR K T OF ROPE END CONNECTIONS The minimum-breaking load given in the data sheet is "‌ specified value in kN, below which the measured breaking force (Fm) is not allowed to fall in a prescribed breaking force test ‌" (according to DIN EN 12385-2, 3.10.10). In particular for the crane designer it is important to know which influence a chosen end connection has on the transferable breaking strength of the rope end connection system. The minimum test strength that should be reached when examining a rope end
connection in a pull test, is determined with regard to the minimum breaking strength of the rope and considering the efficiency factor KT. KT = 0,9 means, the test strength that has to be achieved must be at least 90% of the minimum breaking force of the rope. Unless otherwise indicated, the following basic rules apply: KT = 1,0 for casted rope end connections KT = 0,9 for pressed rope end connections
MB - MB = 17000 mm (F = 32 kN)
MB
MB
MB
MB - SP = 3715 mm (F = 10 kN)
SP
MB - AP = 12500 mm
AP
AP
AP - AP = 4320 mm
AP
AP
AP - SP = 5725 mm
SP
SP - SP = 10415 mm (F = 25 kN)
SP
MB
SP
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