Observe the product manuals!
In addition to the points described here, all information in the section “Instructions regarding safety” in the other supplied product manuals also applies.
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Observe the product manuals! In addition to the points described here, all information in the section “Instructions regarding safety” in the other supplied product manuals also applies. |
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Danger to persons from tandem operation! There is always a risk when working with cranes in tandem operation or when using two trolleys in joint operation. Carefully observe the load, the cranes and the operating range when in tandem or joint operation! If necessary, work with an additional banksman. Only lift the load as far as necessary. Warn other persons within the operating range. |
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Danger of load drop when in tilted position! If a load is transported by two cranes with a tandem control system or by two trolleys in joint operation, there is a danger of the load tilting (e.g. due to failure of a crane or a trolley, unintended speed variations, etc.). The tilted position could, in the case of non-positive slinging, cause the load to slip and thereby fall, killing or injuring people. Sling the load in a positive-locking manner and use load lifting attachments with which the load cannot slip in tilted positions. |
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Danger of falling load from accidental individual operation! If the suspension of a load is shared by both trolleys or both cranes, and one trolley or crane is unintentionally moved on its own, the load may no longer be securely suspended from the load hook, and could fall and kill or injure people. Work with extreme caution. Use caution when switching between cranes and trolleys. When switching, make certain that the trolleys/cranes are not being used in individual operation. |
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Danger to persons if they are not trained! Special technical expertise is required to correctly sling and safely lift and move loads on two cranes in tandem operation (or on two trolleys in joint operation), otherwise potentially fatal accidents could occur. Personnel working with the crane in tandem operation or with two trolleys in joint operation (e.g. crane operators and load handlers) must first have received instruction. The end user is responsible for this instruction. Instruction must be carried out on the basis of this product manual among other things. It is recommended to document this instruction in writing. |
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Danger to persons when turning a load! When loads are turned using two trolleys or two cranes (one hoist lifts, the other lowers), one of the hoists could be overloaded, even when stationary or lowering. This overload is not detected by the overload protection. Potentially fatal accidents could occur. Only use cranes with two trolleys or tandem operation for the transport of loads in a position that remains stable. Do not turn or tilt loads. |
Note
If loads are to be turned with the crane, an overload protection with additional functions and an additional crane may be necessary. In any case, a special hazard analysis made by the end user and special instruction for the crane operator is necessary.
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Danger to persons from diagonal pull! If loads are turned with two trolleys or two cranes, the wire ropes could run slanted between the wire rope hoist and the load! This could damage the wire rope hoist and cause potentially fatal accidents. Only use cranes with two trolleys or tandem operation for the transport of loads in a position that remains stable. Do not allow the wire rope to run slanted! |
Note
If loads are to be turned with the crane, an additional crane may be necessary. In this case as well, the wire rope must not run slanted.
