Bush Lane House, commissioned by Trafalgar House Developments Limited, is a lettable office building in the City of London designed so that the London Transport Jubilee Line tunnels, which were at that time planned to pass directly beneath the building, could be constructed at a later date.
The foundation constraints and consequent column positions created a cantilever condition which meant that the structural solution dominated the building design.
Originally completed by Arup Associates in 1976, Bush Lane House provides eight floors of office accommodation elevated two storeys above ground level, adjacent to Cannon Street Station.
The existing building utilises an external structural frame of stainless steel lattice, which is water filled to provide protection for the structure in the event of a fire.
...A BUILDING DESIGN DRIVEN BY ITS STRUCTURAL SOLUTION TO STRICT FOUNDATION CONSTRAINTS...
Originally designed to bridge over a proposed railway line (the Fleet Line), Greycoat plc acquired Bush Lane House in 1996 to expand its portfolio of ‘landmark’ London buildings and renamed it 80 Cannon Street.
In 1997, Arup Associates were commissioned to extend 80 Cannon Street by utilising the area beneath the existing building to provide restaurant/retail and office facilities. In addition, the Client required the entrance to the existing building to be remodelled and upgraded to enable him to re-launch the whole building in 2004 at the expiry of the current leases. To this end, the design and materials used had to be timeless and robust.
The offices within the existing building remained in use throughout the construction of the new floors and new entrance hall. Conceived as a glass box slipped beneath the original building, 80 Cannon Street provides approx. 1200m2 of high quality office and retail space. The retail unit is separately serviced from the offices and occupies the majority of the ground floor plus all of the lower ground floor.
- 1977 - Structural Steel Award