VOIDED CONCRETE SLABS
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Elbphilharmonie

Concrete and Voids Make Beautiful Music

 

An iconic building that resembles a force of nature.

 

Setting the tone from the beginning, project developer, Alexander Gérard, had an inspiring idea.

The Elbphilharmonie in Hafen City, Hamburg, has a radiance that reaches well beyond the borders of Germany, and even Europe. Shortly after the building was completed in November 2016, more than 850,000 people have attended concerts, 4.5 million visitors have marveled at the impressive architecture, and 70,000 people participated in the guided tours of the concert hall – all in the first year of operation, 2017. The construction and design of the building are anything but mundane. Original plans called for the building to sit upon the storehouse of the original philharmonic orchestra house. Today, the only remaining constituents of the new building are the facade and parts of the old foundations. The base-plate is laid on 1732 posts, which were rammed deep into the bed of the Elbe.

The Elbphilharmonie has 26 floors, and it is a total of 110 meters in height. In view of the number of floors, it is understandable that the Cobiax® voided flat plate slabs are of considerable value for the building. Thanks to Cobiax® technology, it was possible to limit the entire weight of the Elbphilharmonie to 200,000 tons.  It was only by reducing the weight of the slabs and the resultant reduction in the load of the entire building that made the construction of such an elegant building possible.

The Elbphilharmonie is an example of impressive freedom in design and construction. In the case of difficult construction surfaces, e.g. river beds and banks, or existing foundations that must be used, the weight-reduction achieved with Cobiax® voided flat plate slabs enables the construction of buildings that could not be achieved with conventional solid concrete slabs. Architects and engineers also gained valuable design freedom using Cobiax® voided slabs. Greater areas can be spanned without the need for additional columns or beams, and the building gains grandeur, while the overall weight is reduced. Besides the aesthetic and structural advantages, the ecological advantages of Cobiax® Technology also come to fruition:

In a large structure, like the Elbphilharmonie, the logistic advantages also play a decisive role. Less concrete used in the construction also results in fewer concrete mixer trucks driving to and from the construction site. The traffic in and around the Hamburg metropolitan area was noticeably reduced as well. Owing to the use of Cobiax® technology, the construction unit weighs only 12,500 tons. The hall is supported by 342 steel spring packages on the ground and 34 to the top floor, thereby separating hall vibrations from the rest of the building in the deep frequency range.

 
Creating Acoustic Excellence  — The concert hall is completely isolated from the rest of the building in order to ensure its unique acoustics and minimize any interruption from the surrounding environment.

Creating Acoustic Excellence — The concert hall is completely isolated from the rest of the building in order to ensure its unique acoustics and minimize any interruption from the surrounding environment.

 
 

An Architectural Tour of Hamburg's latest landmark. After an extended exterior visit, the curved escalator leads from street level to the public Plaza 37 m above ground.

A Green Solution  — Thanks to the drastically reduced amount of concrete in the slab construction, the carbon emissions were greatly reduced, and considerably less concrete is required.

A Green Solution — Thanks to the drastically reduced amount of concrete in the slab construction, the carbon emissions were greatly reduced, and considerably less concrete is required.


ARCHITECT:      

  • Herzog and de Meuron

ENGINEER:       

  • WGG Schnetzer Puskas, Basel

BUILDERS: 

  • Hochtief

SCOPE: 

  • Slab Surface: 12,000 m2

  • Max. Span: 10 m

  • Slab Depth: 25 -45 cm

SUSTAINABILITY:

  • Concrete Reduction: 440 m2

  • Load Reduction: 1,100 t

  • Carbon Emissions Reduction: 90 t