When SOM designed Fleet Place House in the St Paul's Conservation area of the City of London, it faced particular technical problems. The eight-storey building spans active railway lines, and the solution is to use CHS concretefilled external columns that converge on eight 'moon pads'. Services are external, allowing a 17.5m span of column-free space at each level. The curtain wall provides the illusion of a sheer glass facade, but in fact opens up to create a portal to the Thameslink station.
Structural engineer was Waterman Partnership.