The Avenue de la Division Leclerc is located north of the La Défense district, enclosed by the CNIT and the Coupole building complex. It consists of an access ramp to the A14 motorway at the entrance / exit and two side lanes.


In this dense urban context, the Trinity project reinforces pedestrian links between neighbourhoods and an office offering with a capacity of 3,300 people. It includes a traffic lane roofing structure and a 31-storey tower rising above the resulting esplanade.




Complete project management, including:

  • Preliminary design studies: APS / APD for the tower and preliminary design for the roof
  • The realization of the business consultation documents for the structure part
  • Work monitoring and approval of implementation plans
  • The entire tower structural plans are produced using a 3D model developed in Revit


Key information


Client: SCI Trinity Défense (Unibail Rodamco Westfield)

Project management Consortium: setec tpi, Cro & Co, Barbanel, AE75, Egyde

Duration: Studies: 2011-2014; Works: 2015 – 2019


© SCI Trinity Defense / Cro&Co Architecture / L’autre Image Production

In a Nutshell

3,300people office capacity

Surface infrastructure :

  • 4 700 m² covers
  • 3 "tubes" of 123 m, 128 m and 135 m
  • An underground gallery of 160mx10m under the CNIT service road

Tower :

  • 31 floors in superstructure
  • 3,000 m² SHON of R.I.E.
  • 49,000 m² of office space
  • 600 m² SHON of shops
  • Height: 150 m from the road level

The key features of covered roads:

Besides the usual problems related to the design of towers, setec tpi develops its teams' experiences in underground engineering to deal with issues such as safety, equipments and fire designs.