Russell Thomas of Symmetrys was the lead engineer on this new build speculative commercial development for a pension fund in the City of London. The new building reused the basement shell of the existing 1970s RC framed offices with new foundations installed through the existing shell.
The new superstructure was a composite steel frame with in-situ RC slabs on a 10m x 8m grid. This generous grid gave flexibility of floor layouts whilst the cellular floor beams permitted service routing within the structural zone to maximise headroom. Procurement input from the main contractor enabled useful early sub-contractor engagement of key elements such as the cellular steel frame and the precast panels supporting the Portland Stone cladding.