6.4.8 Lifting Heights

The available lifting height, i.e. range of lift, will vary with the power operated hoist design. As a general rule, chain hoists are restricted to 20 metres although longer lifts may be available. This is due to the action of the chain passing over the load wheel which sets up an oscillation in the loaded side of the chain and this can lead to the load swinging. The weight of the chain is also a significant factor which must be taken into account, being heavier than wire rope of the equivalent capacity. Wire rope hoists do not suffer from this oscillation and therefore far greater lifting heights are available. In all cases, it is necessary to consult with the manufacturer to establish the range of extended dimensions available.