This is a project by Manuelle Gautrand and it is located at Chateaucreux, Saint-Etienne, France. Project's program: Office building (1500 workstations), business canteen and 400 parking places. There are twenty nine images for La Cite des Affaires.
The site is a vital liaison point between the centre of Saint-Etienne and the new Chateaucreux neighbourhood, to which it forms a major entranceway.
The idea was to develop a long built 'continuum' on the site to interact with adjacent streets. A linear construction that rears up and unfolds but also hugs the ground line to form a low accessible building - one that opens spacious courts and lifts bold overhangs.
Each of its large bays serves an access route: the main portal opens to the concourse on avenue Grüner, which draws pedestrians into the project in a sliding movement. A high ceiling shelters and magnifies this entranceway, which is the finest and largest of three. The other two large 'ports' open the project to the streets that irrigate the lot, interconnecting pedestrian itineraries in the area.
Our desire for continuity in construction does not simply reflect the idea of building a legible and unitary urban landmark, it also provides the flexibility that the project needs. In fact, the principle behind this continuum is to imagine a set of 'communicating parts' that enable the user-administrations to merge into a whole, one and all, and to evolve according to their needs in harmony with those of other tenants. The absence of breaks in surfaces will ensure that things remain open-ended, with the possibility of extending or reducing space.
The project is like a large 'Aztec serpent' rising on the lot. Its body has three identical outer faces, and an underside that is different: a skin of silvery transparent scales and a bright yellow 'throat', shiny and opaque.
This dual treatment of surfaces obeys a simple logic shared throughout, which aims at expressing clarity in folds. Depending on these movements, the yellow underside is either a floating canopy or an interior vertical wall, accompanying internal pedestrian movements with its rich luminous presence. The nearness of so much gorgeous yellow brightens up pavements and glazed elevations, casting golden washes over them like sunlight...
General description of the building:
The building superstructures volume is a parallelepiped, almost rectangle (length: 108m, width: 43m, max height: 34m).
This parallelepiped is hollowed out by the following:
The result is a catalogue of different joined building's parts and spread out by the following:
High performance façade:
The façade's design is the answer to the architectural, programmatic, geographic and economic context, with the purpose to lead to high thermal performances. The façade's principle is based on the complimentarity of a glass skin and a mineral skin. Each skin performs from energetic and thermal viewpoints.
High thermal performance thanks to:
A highlighted contribution is ensured by the façade: