In one of the biggest power plants in Germany, in Hamm, six silos are being constructed, each 61m in height. The contractor was looking for a building hoist capable of transporting both passengers and material throughout the construction. The task seems easy at first sight but in fact various critical points have to be considered in detail:
On a sliding or climbing formwork the landing level continuously changes which means that the hoist has to be able to access safely the constantly changing top landing level. Furthermore, the installation of mast sections should only be done as infrequently as possible to minimise impact on the concrete casting process, demanding the maximum oversail above the last tie as possible.
In order to provide this Scanclimber developed a variable landing system on which the landing cam automatically adjusts as the formwork level changes. Scanclimber delivered an SC2032FC hoist which allows a free mast top or oversail of up to 15m. This means that the useable mast can be up to 15m above the last anchoring and thus providing operational flexibility required.
In order to serve all three segments of the construction a total of three hoists were installed during the project. A big advantage was the adjustable ground frame which due to its design and construction offered the ability to work without an anchoring frame being required to be cast into the foundation slab. So, no 'lost' parts are necessary and the erection of the machines could be done quickly.
The hoist was equipped with a hydraulic landing ramp and was connected to a 1.10m landing door, complying with the new EN machine directive. The hydraulic ramp itself is controlled from the cage. As soon as the cage reaches the landing level, the footbridge ramp automatically lowers and rests on the landing door beam integrated with the formwork. The ramp is interlocked with the landing door so that the landing door can be opened with the help of a control lever but only when the ramp is present.
Scanclimber has extensive experience in the area of power plant construction. For the construction of the cooling tower hoists in the Neurath, Datteln, Karlsruhe and Hamm power plants Scanclimber hoists were erected and now, in Moorburg power plant, to be built at short notice, the hoist on the cooling tower will also be supplied by Scanclimber. This unit will once again follow the contours of the cooling tower structure.
Of course, on such building projects, close and dedicated technical support is required: this starts with evaluating various anchoring plans, calculation of anchoring forces depending on inclination and course of the cooling tower waistline, and ends with 24hr standby service on multi-shift operation in order to guarantee complete support throughout the project time span.
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