Trinity Tower

La Défense - Paris › France

In an unprecedented project in France, the Trinity Tower underpins its 32 floors and 158m high building on a concrete slab that overlaps a 7-lane road. As the company in charge of the connection design, supply, fabrication, and assembly of the complete structural steel and metal deck, bysteel took part in this engineering milestone. Despite the site's numerous logistical limitations and the project's complexity, bysteel was able to guarantee a rapid assembly pace, assembling one level per week.
The architecture signed by Cro and co. stands out for the various green spaces on balconies and terraces that make the tower a more comfortable and welcoming space for its users. This project has a special symbolism as it was bysteel's first project in the important economic center of La Défense.

© Ricardo Oliveira Alves

Country | Year

La Défense - Paris, France 2020


Cro and Co.


Unibail Rodamco




2,300t metallic structures


BREEAM Excellent
Exceptional HQE


Trophée de la Construction 2021 _ Category Offices
CTBUH Award 2021 _ Excellence Award
Prix SIATI 2020 _ Most innovative project