The glass and steel Greenside Place bridge in Edinburgh, designed by Broadway Malyan and Buro Happold ( pictured above), was hailed as a 'deceptively simple yet elegant' structure by the Institution of Structural Engineers (IStructE) judges.
Weighing almost 90 tons, the unusual s-shaped bridge links a multi-storey car park to the St James shopping centre in the historic heart of the Scottish capital.
Describing the project, IStructE president Michael Dickson said: 'The bridge is a striking example of structural engineering, an elegant solution to some challenging site constraints.'
Whitbybird took the other special award for the RRP-designed Mossbourne Community Academy in Hackney, east London ( pictured below).
The highly-acclaimed, v-plan secondary school is constructed mainly from timber, concrete and glass.
'The laminated timber frame is the principal feature which nurtures the architecture of this fine Academy,' said the judges.
'Good detailing of all timber column and beams connections, and the variety of supported concrete floors and suspended stairways has created a friendly school environment, full of natural light and ventilation.'
Buro Happold and Whitbybird are expected to collect their awards at a ceremony later today.