Raising of an existing office building – Via Cernaia 8/10 – Milan (MI) – Italy

Final and detailed design and works supervision of the structural works

 

Client: Beni Stabili SIIQ
Buildings surface: 9.000 m2
Structural works value: 680.000,00 €
Period of design and execution of works: 2015÷2017

 

The building, intended for office use, has an area of about 9,000 square meters and is divided into nine blocks or zones that form a plan with two central courtyards.
It is composed of a basement, ground floor, three floors above ground and a roofing floor as well as some technical blocks that rise from the latter.
After the first construction that took place at the end of the 1940s, most of the structures were rebuilt in the 1980s.
These are of a traditional typology and consist of columns, walls, beams and floor slabs made in reinforced concrete cast in place; the original foundations footings where enlarged and provided of sub-foundation micro piles during the refurbishment interventions of 1980s
After carrying out a complete survey to arrive at an accurate knowledge of the existing structure and of the characteristics of the materials, the seismic vulnerability assessment was performed, according to the planned raising intervention with an additional floor.
The excellent conservation conditions of the structures and their original strength have made it possible to retrofit it according to the current legislation (NTC2008) with few and targeted strengthening measures.
The structures of the additional floor were made of steel, in order to reduce their weight to the maximum, and therefore their influence on existing structures.