7.5.4 Rope Drum Storage Capacity

If the wire rope is to be used in a single fall, then the rope drum must be large enough to store an amount of rope at least equal to the maximum height of lift. However, if the wire rope is to be used with a pulley block arrangement, it must be remembered that the drum will need to accommodate a rope length equal to the height of lift multiplied by the number of falls of rope. Care must be taken to ensure that the rope does not over fill the drum and the manufacturer’s recommendations should be followed. When the rope is fully wound onto the drum, the drum flanges should be at least two times the rope diameter higher than the outer coil of rope.