Rising up out of the ground are four circular buildings, the largest of them dedicated to researchers’ workstations. Next to this real estate ensemble, built by the SBX grouping for EDF’s R&D division, a second project will host the EDF Training Campus. Our teams built this real estate project with a total surface area of 120,000 m² and nearly 1,500 workstations for EDF’s Research and Development Division. The site also includes a conference center, a 550-seat auditorium and an underground car park. A specific feature of the site is its proximity to Orly airport. The height of the buildings, along with the cranes used to erect them, is therefore limited to three levels, and the upper part of one of the four buildings had to be completed without a crane. The limitation imposed on lifting apparatus required considerable implementation flexibility by the BESIX teams.