25.08.2016 Shuttering: swift and skyward with TOPMAX and GASS

50 cm thick slabs at a height of 7.65 m – specifications of this nature would normally call for some kind of formwork-supporting structure. Yet for the in-situ concrete construction site dedicated to Oslo's new national museum, Hünnebeck engineers came up with an alternative solution that is readily assembled and can be transferred from place to place in a very short time: it's a combination of TOPMAX floor table and GASS shoring tower.

Oslo's new national museum for art, architecture and design is scheduled for completion by 2020. An area of 13,000 square meters will then be home to all the collections presently on show at three separate museums located in downtown Oslo. The new building has been designed by German architects Kleihues + Schuwerk whose proposal impressed the jury with its unobtrusiveness. 

Since project launch in the summer of 2014, things have been very busy on the 54,000 square meter construction site in the harbor area in downtown Oslo. Hünnebeck, among the companies represented on the site, was able to propose through its Norwegian dealer Hansmark AS a slab shuttering solution remarkable for its time and cost efficiency. It uses a combination of the TOPMAX steel frame floor table and the GASS shoring tower for shaping the up to 50 cm thick slabs mounted at heights of up to 7.65 m.

Normally such heights and loads would have called for some kind of shoring, a solution that is costly and time-consuming in assembly and, especially, when moving the slab formwork from place to place. For each stripping cycle, the shoring would have to be completely disassembled and reassembled elsewhere. The proposal put forward by Hünnebeck, in contrast, allows the complete unit of floor table and supporting structure to be relocated in no time at all. Horizontally, the formwork "travels," vertically it is shifted by fork and crane. This is a procedure that is much more time efficient compared with conventional shoring solutions and allows the fabric workers to advance much more quickly in their job.

At the same time, the combination of the two systems ensures a high degree of productivity. The three lightweight basic aluminum components of the GASS system (prop, centerpiece, and frame) can be assembled quickly and intuitively into towers of high load-bearing capacities. In fact, per leg, GASS has a capacity of up to 140 kN. Moreover, the 13 square meter TOPMAX floor tables are designed, in particular, to allow the rapid shuttering of large, regularly shaped, repetitive floor plans. The multifunctional connecting options of the 12 cm tall TOPMAX steel frame facilitates the rapid production of infill and adjustment areas within the system, while the premium ECOPLY plastic form lining ensures smooth concrete finishes and requires very little in the way of cleaning.

The site workers are enthusiastic about the shuttering solution which has turned out to be a genuine construction work accelerator. "We're well aware of the versatility of the systems we can offer. In fact, our strength is to be able to devise shuttering techniques for our customers that precisely match the specific challenges of a given site," says Hünnebeck's Project Manager, well pleased with the positive response.

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