Tito Speri Tower Competition, Milan, Italy
The design of the new building for Reale Immobili aims to combine the uniqueness of the tower with a volumetric articulation that allows it to interact with the existing urban texture while also becoming a recognizable element of the cityscape.
The new building blends lightness and urban expressiveness, featuring a technologically advanced and flexible design.
The structure is clear and well-defined: a solid, urban ground floor made of concrete, while the upper floors, lighter and more airy, are constructed using steel and wood.
The project’s specificity lies in combining a vertical development with a progressive scaling of volumes.
This solution requires careful placement of columns to avoid elements that are almost entirely hanging.
Vertical resistance is given by the reinforced concrete stair-elevator cores, coupled with steel double hinged columns.
The foundations consist of a raft slab, to be constructed within the footprint of the existing building after its demolition.
Basement floors are built with precast prestressed concrete (PPC) elements, completed with a structural topping.
This solution arises from the need to provide adequate contrast to the excavation walls, which require high in-plane stiffness of the slab—a requirement perfectly met by this type of system.
Elevated floors are built with IFB-type steel beams with asymmetric flanges, supporting prefabricated wooden panels resting on the lower flange, with an upper concrete topping integrated during production.
The joints between the panels and beams are completed on-site with limited concrete casts to connect the structural topping, ensuring its continuity, which is necessary for transmitting horizontal forces to the cores.
Horizontal stability is provided by the reinforced concrete stair-elevator cores.
Their extended dimensions, dictated by functional vertical transport needs, result in high stiffness, sufficient not only to ensure overall stability but also to limit horizontal deformations.
The external walkway is a fully prefabricated, modular metal structure, with horizontal elements supported on the inner side by steel beams attached to the slab’s edge beams using thermal break joints, and on the outer side by tubular uprights
