Infinity Bridge

Initial investigations for the footbridge were done by the White Young Green Group, who with English Partnerships produced a brief for an international architectural design competition, organised with RIBA Competitions and launched in April 2003. The brief was for a "prestigious" and "iconic" "landmark" footbridge at North Shore Stockton, to cross the River Tees, which is 125 m wide at that point. More than 200 submissions were made to the RIBA Competition; from these a shortlist of five was selected. The successful competition design was by Expedition Engineering and Spence Associates. The subsequent design was led by Expedition Engineering assisted by Arup Materials, Balfour Beatty…

The bridge is a dual, tied arch bridge or bowstring bridge. It has a pair of continuous, differently-sized structural steel arches with suspended precast concrete decking A reflex piece between the two arches holds them together, The river pier is supported by an 11.5 m square by 2.5 m thick pile cap on sixteen 1 m diameter hollow steel pipe piles. against the large flows when the Tees Barrage downstream discharges. Each of the two concrete riverside piers are supported on four 500 mm hollow steel piles and a pile cap. It was originally designed with a northern approach 38 m long and a southern approach of 54 m; however, the design of the north side of the bridge was later simplified and…