Page 154 - AIT1022_E-Paper

BÜRO UND VERWALTUNG • OFFICE BUILDINGS TECHNISCHER AUSBAU • TECHNICAL SOLUTIONS

Ein reduzierter Kanon aus Beton, Holz, Glas und Textilien • A minimalist range of various materials

Das Treppenhaus lebt von der nackten Schönheit des Betons. • The staircase lives from the beauty of the concrete. Im Zeichen des Kräfteverlaufs „stehen“ die Hängestützen. • The suspended supports reflect the flow of forces.

A transalpine axis with the local bus network. IR and IC trains running through the fect. As to the typology, the building structure is symmetrically assembled and is di-
s a new transport hub, Altdorf station connects the primary railway line of the
vided by two open staircases. This generates evenly staggered room zones which can
Gotthard base tunnel can now also stop at the cantonal capital. The new service centre be flexibly subdivided depending on their use – in this way, a variety of rooms can be
is considered to be the prelude to the Urner Talboden development region. The request planned on the upper floors. We designed the ground floor as a hall without any sup-
was for a striking building which appropriately borders the railway line and is the star- ports to make it possible to use it a restaurant- and sales area. With the goal of com-
ting point for the further urban development. The main user of the building is the bining the requirements of the users, the architecture and those of the building tech-
Urner Kantonalbank which initiated the project and moved its headquarters into the nology into an integral whole, we developed a reinforced-concrete construction which
new building. With the precise positioning of the construction volume, we produce was cast in situ. Taking all the relevant parameters into consideration, the construc-
new spatial relationships in the surroundings: The linear form gives the station square tion carries the loads efficiently and economically.
a clear border – the incoming transport axes are spatially merged. Due to the repetitive
arrangement and the urban-development scale, the building quite autonomously esta- From the construction to the building technology
blishes itself as the public centre of the Swiss community. The volumetric narrowing
at the level of the ground floor and the far-projecting upper storeys represent a kind of The carrying axes are arranged at an interval of almost nine metres and run through
negative image of the spatial routing of the railway and the bus lines. the whole length of the building in transverse direction. Whereas the façade supports
at the back and the large central interior supports extend across the entire building
Support structure of concrete – or: The emphasis on the concreting height, the middle supports and the front façade supports are suspended from pre-
stressed concrete supports on the top level and serve as bearing for the ceilings –
The concept is based on a frame construction with a level of supports located above thanks to this clever design, we succeeded in keeping the ground floor free of supports.
it. Via the connecting architrave, the suspended supports of the façade pass the loads Since the suspended supports are arranged at the projection and in the middle of the
of the building projection on into the support level. Two rows of vertical cross supports field, the supports have a balanced load; in this way, the stress and the deformation
pass the forces on into the ground. Recessed by each level, the suspended supports are reduced to a minimum. The bracing happens takes place via the C-shaped shear
give the main façade oriented towards the station square an additional sculptural ef- walls of the two stairwells which are inserted into the basement’s hollow-web girder.

154 • AIT 10.2022