The CBX Tower is located in la Défense between the Europe Tower and the Eagle Star Buref Tower along the “circular boulevard” ; it cuts across the footbridge of the “reflets”, and was integrated in the project.
The owner is TST Tishman Speyer T, a member of the American Group Tishman Speyer Properties, one of the most important promoters in the world.
The CBX tower is characterized by a sharp edge pointing toward Paris, formed by the triple conjunction of a flat façade along the circular boulevard, a curved façade and a tilted roof.
The supporting structure of the tower is made of a high performance reinforced concrete composed of an offset core 14 m x 34 m and by 20 façade posts. The core is laid on a limestone layer located 20 m below the boulevard level and the façade posts are supported on large sized wells attaining the same substratum.
The dynamic and static behaviour of the tower was covered by detailed calculations using a finite elements model.
- Prime contractorship for the complete structure.
- Preliminary project structural studies.
- Compiling of the corporate request for proposals file for the “structure” part.
- Tracking and follow-up of the work and control of the execution drawings.
The architectural design and the density of the site in terms of elevation and the subsoil required a transfer of a major portion of the 100,000 tons constituting the total mass of this tower.
A transfer slab 2.20 m thick by 26 m high assures a transfer of the 2 m façade toward the interior of the tower and the transfer of a part of the core imposed by the presence of the access footbridge to the tower.
Five monumental transfer beams, including one 34 m long, were necessary to transfer the loads on either side of all the galleries and the existing miscellaneous subsoil networks.
Client : Tishman Speyer Properties
- Architects :
- Kohn Pedersen Fox Associates
- Saubot Rouit et Associés
- Structure : setec tpi
Period : 2000 -2003