SCHOTT TIKANA<sup>®</sup> in Schocken Department Store, Chemnitz - Germany
TIKANA® in Schocken Department Store, Chemnitz - Germany© SCHOTT /Roland Halbe

The Project

The Team

The Material

Today the former Schocken department store is a hub of the state museum for archaeology in Chemnitz – briefly “smac”. Before “smac” could be housed in the building, it had to be rebuilt, at first extensively – but also in an appropriate manner for monuments.
For the authentic glazing for the historical bands of windows of the former Schocken department store, the architects and engineers decided to use TIKANA® restoration glass from SCHOTT.
Architects
ARGE Kaufhaus Schocken
Auer+Weber+Assoziierte
knerer und lang
Architekten BDA
Stuttgart Dresden

Structural engineer for glass
glasfaktor Ingenieure GmbH, Dresden

Glass processor
Flachglas Sachsen GmbH, Grimma

Glass manufacturer
SCHOTT
The colourless, machine-drawn glass conforms to historical window glasses. Thus, the glass has, for example, a similarly slightly irregular surface like the windows during Mendelsohn’s time.

The Project

Back
The background
It is a piece of German company history:
In only 30 years, the Schocken company developed into the fourth largest department store chain in Germany with numerous subsidiaries, among them, in Cottbus, Stuttgart, Nuremberg, and Chemnitz.

For the conversion of the Chemnitz department store, originally completed in 1930, which was used as such until 2001, the Schocken Brother owners used the architect Erich Mendelsohn again. He was one of the most important architects of the 20th. Century, and had already planned the Schocken department store in Stuttgart. Mendelsohn planned a 9-storey building with triangular cut-outs in Chemnitz.


The Challenge
Today the former Schocken department store is a hub of the state museum for archaeology in Chemnitz – briefly “smac”. Before “smac” could be housed in the building, it had to be rebuilt, at first extensively – but also in an appropriate manner for monuments. The challenge was to carry out the changes in such a way that the former appearance of the building was retained in light of Mendelsohn’s purposes. On the street-frontage, this concerned the historically correct renewal of the bands of windows in the upper floors, and the window fronts of the lateral stairways. At the same time, solar protection and heat insulation had to be integrated.

The Solution
For the authentic glazing for the historical bands of windows of the former Schocken department store, the architects and engineers decided to use TIKANA ® restoration glass from SCHOTT.

The Team

Back
Architects
ARGE Kaufhaus Schocken
Auer+Weber+Assoziierte
knerer und lang
Architekten BDA
Stuttgart Dresden

Structural engineer for glass
glasfaktor Ingenieure GmbH, Dresden

Glass processor
Flachglas Sachsen GmbH, Grimma

Glass manufacturer
SCHOTT

The Material

Back
The colourless, machine-drawn glass conforms to historical window glasses. Thus, the glass has, for example, a similarly slightly irregular surface like the windows during Mendelsohn’s time. This is not by chance; SCHOTT developed restoration glass especially for the glazing of buildings from the classical modern age and the Bauhaus construction style. TIKANA® shows the typical drawn streakiness of window glasses from this design era. Other advantages of the special glass: 91 percent of the light passes through, and has 100 % colour-rendering. Hence, it is well suited for the glazing of museum windows. Not only this: TIKANA® can be processed in various ways; contemporary construction functions, like integrated solar protection, are easily realizable.

In Chemnitz, an innovative insulating glass was integrated into the bands of windows. This consists, for example, of a 6 mm-thick outside pane with solar protection coating, a 16 mm-wide spacer, as well as an 8 mm-thick interior float glass pane. In the areas where the insulating glass should protect against burglary, laminated security glass was used instead of float glass. Spaces are filled in both cases with argon. The historical existing single glazing in the lateral stairways gave way to a TIKANA® – insulating glass, with matte sandblasting and 8 mm-thick spacers. For heat insulation, the space of the panes was filled with krypton. The company glasfaktor Ingenieure GmbH from Dresden performed the structural analysis of the glass assemblies on the basis of the European Technical Approval ETA-12/0159 for SCHOTT Forcault glasses.

TIKANA® is drawn using the Fourcault method, a procedure which the Belgian Emile Fourcault patented in 1902. In the construction era from 1920 to 1960, machine-drawn glass was THE material for window and façades glazing. Today, its characteristics are technically production- controlled. Thereby, restoration glass is fine-tuned by SCHOTT to match precisely the desired original glass of Mendelsohn’s time.