1. Crane machines (single beam cranes, electric hoist cranes) should be scrapped when the number of broken wires exceed 10%, the rope is rusted or the surface is worn up to 40%, and there are dead bends and structural deformation of the rope core. If the broken wire or abrasion is less than the scrap standard, the bearing capacity should be reduced proportionally, when it is manually driven, K = 4.5; when it is mechanically driven, K = 5 ～ 6.2. Wire ropes of crane machines should be with a safety factor of K = 3.5, specifications should conform to the requirements of the construction plan ...
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