The EUR towers complex is made up of a group of several buildings which, having considerable architectural and urban planning importance, were once redeveloped and transformed into Telecom’s headquarters.
The intervention lot, located in the municipality of Rome, on the northern side of the EUR artificial lake and close to the EUR Fermi metro station, has dimensions in plan of approximately 154 m x 100 m, and a surface area of over 15,500 m2.

The structural project handled by Steel Project Engineering is part of a larger restoration and conservative rehabilitation intervention, in order to achieve seismic and static adaptation to current regulations, while remaining faithful to the original project with interventions targeted on critical structural elements. Our studio, specifically, dealt with the executive and construction project for all aspects concerning the metal structures (for a total of approximately 6,000 tons) and the interfaces with the existing reinforced concrete structures.

The complex consists of five existing buildings, described below:

• Three tower buildings (B, C, C1) whose load-bearing framework is made of reinforced concrete made up of single walls and beams cast on site, generally in slab thickness, measuring approximately 48.50 m x 14.00 m (C and C1) and 38.60m x 27.70m (B);
• A building with a quadrangular plan (A), in reinforced concrete consisting of a frame system, measuring approximately 42.50 m x 42.50 m;
• A building with an elongated plan, two underground floors and four floors above ground (D), in reinforced concrete consisting of a frame system, measuring approximately 14.00 m x 99.00 m.
There are also a series of newly built metal carpentry buildings that fit between the buildings previously described, connecting them to each other:
• Buildings G1, G2, G3, G4, G5, two floors;
• Building E, four floors. This, being the central building, has the role of the central nucleus (represents the hub of the entire complex) and therefore has an irregular shape, having to be inserted between the existing surrounding blocks.

The development operation of the Grand Paris Express public transport network extends over a length of approximately 20 km. It has two underground sections, north (sector 3) and south (sector 1), and one aerial section (sector 2). The aerial section extends for approximately 5.2 km between Gonesse and Tremblay-en-France.
We took care of the executive design of the “Gare du Parc des Expositions” (PEX) and the “Passerelle” which are part of the complex of the elevated section. The station is crossed by the viaduct on which trains circulate and whose structures are independent from those of the remaining structures. The station structure extends over a width of approximately 28 meters (overall) and a length of approximately 181 m (without expansion joints), on 4 levels:
– on the ground floor, technical rooms and a circulation space for the exhibition centre;
– in the basement, circulation spaces and spaces reserved for operator personnel;
– on the mezzanine floor, a public space for the circulation of passengers;
– on the upper level and on a central part 54 m long, the platforms.

On the ground floor, the main structure consists of steel frames made up of straight columns and V-shaped columns approximately 8.50 m high. The columns are connected at the top by a welded composite beam with a double T section. On the mezzanine floor there are independent double portals, made up of straight box-section steel uprights, fitted at the top to compose a Vierendeel scheme.
The roof connects at the level of the platforms and is made up of a series of arches arranged at 9 m intervals, connected by tubular section purlins that support the EFTE roof. The mezzanine floor is made up of a composite steel-concrete sectional floor; on the platform level there is, however, a solid slab in approx.

The “Passerelle” allows you to connect the “Paris Nord 2” commercial area to the north-west and the “Parc International Des Expositions de Paris-Nord Villepinte (PIEX)” to the south-east. It allows crossing the RER tracks and connecting to the future PEX station. The primary horizontal structure consists of a main central beam, continuous across the entire walkway. The typical retaining cross section is a welded composite trapezoidal box, with a width varying from 800 mm to 1200 mm and an overall height of 660 mm. The caisson is widened to span the wide span in the station extension. The T-section or double-T section oars with variable inertia (T-profiles: variable height from 50 to 200mm, double-T profiles: variable height from 700 to 250mm) are grafted onto the central beam and support the orthotropic slab covered with a finish on asphalt. The oars are arranged at an average distance of approximately 2.55m. A series of columns, composed of round tube profiles (D=193.7mm external), act as support for the walkway deck. There are also stairs, support structures for elevators and escalators.

The new emergency room structure of San Giovanni di Dio in Florence will be made of reinforced concrete, and will have plan dimensions of 85m x 53m, and a height of 20m. It is composed of a basement level, with dimensions of 2000 m2, and 3 levels above ground, respectively of 4285 m2 (ground floor and first floor), 3900 m2 (second floor). The third level has a part covered by a metal structure with concentric braces, for a total surface area of 2200m2. The decks will be made using a solid concrete slab in order to allow the correct installation of the hanging systems. The horizontal actions will be assigned mainly to the stair-lift blocks and the reinforced concrete partitions arranged ad hoc in the plan so as not to compromise either the aesthetic or functional aspect. Since the site where the emergency room will be built appears to have a non-excessive design seismic action, a NON-dissipative design was opted for.