3 World Trade Centre, Manhattan

The city’s fifth-tallest building spans 80 storeys and reaches 1,079 feet (329 metres) high, making it currently the second tallest building at the redeveloped World Trade Center site. Also known as 3WTC, the building is surrounded by 10,000 floor-to-ceiling glass panels and based on a reinforced concrete core. Steel girders and beams form a lattice K-shaped pattern up the sides of the tower. All the corners are without columns and are shaped by an exterior glass and steel bracing system. This bracing is finished in stainless steel to complement the reflective glass.

The design is typical of the firm’s work, which includes a set of residential high-rises across from the Tate Modern in London that features a similar external bracing system. Located at 175 Greenwich Street in Downtown Manhattan, 3WTC is a mixed-use building with plans to include offices and private residences. The first three storeys and two below grades are designated for retail. For ventilation, air is drawn into the building from high up the tower – so it is supposedly cleaner than at ground level – and then filtered to remove chemical pollutants. Three terraces are included in the tower, on floors 17, 60 and 76, with the upper two being privately owned by companies. The top terrace is currently the tallest outdoor office patio in Manhattan, at 935 feet (285 metres) above ground level. The tower is part of the greater World Trade Center (WTC) campus, which includes SOM’s One World Trade, which welcomed its first tenants in November 2014, and Spanish architect Santiago Calatrava’s Oculus, which serves as the WTC Transportation Hub. The entire WTC campus is spearheaded by Silverstein Properties in collaboration with the Port Authority of New York and New Jersey, which owns most of the property.