The highly secured HM Treasury of London recently decided to cover seven of its many courtyards to increase programmable space and to ensure a safe enclosure whilst not losing any of the light.
As a government building, the structure and connections needed to be designed to withstand blast loading. The frame is a minimal structure consisting of a series of curved rafters sitting on columns.
DDA worked with the specialist steel fabricator developing the connection design for the steelwork including pinned bases and in-line splices.
The resulting structure maintains the clean lines of the architect's original concept and the structural integrity required for government buildings, whilst maintaining the fabrication and construction requirements of the fabricator.