|CLIENT:||Severfield (UK) Ltd|
|LOCATION:||London, United Kingdom|
Located in the City of London financial district, 22 Bishopsgate, also known as Twentytwo, is a prominent commercial skyscraper. With 62 floors, the building stands at 278 meters (912 feet) high. The structure is primarily composed of two parts, the concrete central core and the steel beams and columns surrounding it.
The building’s main superstructure consists of a steel-frame tower with a concrete jump-form core at its center and composite cellular beams that provide a diaphragm action restraint for the perimeter columns. On each side of the core, there are three column positions that act as outrigger stability structures, connected to the core through storey-deep trusses. The project features a three-level basement that is supported by columns and transfer structures that take the load down to piled foundations. With a closed cavity glazed curtain wall façade, the building has very clear glazing while meeting the building’s environmental requirements.
With a tight deadline and multiple stakeholders involved, it was challenging to provide the client with the necessary information to allow them to control fabrication and erection process. 22 Bishopsgate had adopted a top-down methodology for its construction and the DBM Vircon team seamlessly integrated with existing foundations for an entirely new building design.