King William Street


The building has a 2 level basement constructed with no crane access, which required easily manually handled, lightweight formwork systems throughout. It is also an island site that occupies the entire 2,200 m2 footprint which required the construction of a logistics slab to enable the supply of concrete to the building without interruption to other trades. The project had a requirement of 5,000 m3 of high quality concrete and 500 Tonnes of reinforcement, with a work force of 50 operatives.

33 King William St is a new office development in Central London providing a total of 22,200 m2 of office space.

Consisting of both reinforced concrete slabs and concrete on composite deck, the project also had a high count of both column and beam encasements.

A number of column encasements had special finish architectural concrete containing Silver Mica course flaked admixture. These column encasements vary between 4 and 12m in height by .65m in diameter. The Silver Mica mix is also used in the public lift shaft that provides access between Upper Thames Street and King William Street.



Main Contractor

HB Reavis


John Robertson Architects

Structural Engineer

Waterman Structure Ltd.

Quadrant 3

Regent Street, London