The rehabilitation of the GAMMA Towers is a threefold project. It involves securing two high-rise buildings, excavating and converting the floors of Towers A and B (used as office space) and changing their façades.
The GAMMA A and B towers, owned by GECINA, are located on rue de Bercy in the Gare de Lyon district of Paris.
Together with the GAMMA D tower, now the CitizenM Hotel (which is outside the scope of this project) and the GAMMA C shopping centre (also outside the scope of this project), they make up the GAMMA complex, a mixed-use hub ideally located in the immediate vicinity of the Gare de Lyon in an area undergoing major change.
Towers A and B each rise 15 storeys above the shopping arcade, which acts as a foundation. Five levels of car parking, located beneath the shopping arcade, complete the complex.
The project is part of an objective to regenerate Towers A and B over and above the existing buildings, with a view to improving their urban integration, in accordance with the vision developed by Dubuisson Architecture.
The main technical challenges are:
- managing fire prevention requirements
- meeting high environmental standards,
- structural reinforcement of the foundations,
so that the new building programme can be developed.
