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Contractors World - INTERNATIONAL
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Contractors World INTERNATIONAL - 2016 Vol 7 No 2

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South Africa: Luffing cranes on Kusile Power Plant project . . . . continued

To aid construction, seven red Wolff cranes owned by Mitsubishi Hitachi Power Systems Africa (MHPSA) are currently in operation.

Despite having a tower height of 120 meters, the Wolff 1250 B cranes with their 60 m long jibs are only tied to the stair towers of the boiler plants once. It goes without saying that the dimensions on the site are correspondingly big: Almost 60-ton heavy steel and concrete elements have to be moved, and a total of approximately 115,000 tons of steel will be installed in the construction.

To aid construction, seven red Wolff cranes owned by Mitsubishi Hitachi Power Systems Africa (MHPSA) are currently in operation.

Four Wolff 1250 B luffing cranes are at the power plant site where they really earn their place with their lifting capacity of up to 60 tons.

These cranes also feature the standard Wolff Fine Positioning controls allowing for a centimetre accurate positioning of loads. This is of major importance in the cramped conditions on the construction site.

Despite having a tower height of 120 meters, the Wolff 1250 B cranes with their 60 m long jibs are only tied to the stair towers of the boiler plants once.

Andreas Kahl, Managing Director at Wolffkran, explains:

“Working together with MHPSA, our technical support department developed special collar frames for the stair towers to enable simple and yet stable anchoring of the crane to the structure.”
      “The crane concept envisages that one of the 1250 B cranes will be relocated to Unit 6 as construction progresses.”

Luffing Crane On Top Of Boiler Plant

The four red giants are supported by three Wolff 355 B luffing cranes with 50 m jibs, which were erected directly on top of the 122 m high boiler plants. In this way, an overall hook height of 186 m was achieved with the use of just one tower segment.

Wolffkran


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