The £55,000 project at Longstanton involved a five-tonne 10.5x2m pedestrian bridge and a nine-tonne 9.5x3m light vehicle bridge. The structures, installed on concrete abutments, link the development to a central open space.
HLD designed, supplied and installed the bridges for contractor Cofton Ltd.
It said ekki weighed between 60-70lbs per ft3 and was virtually unaffected by seasonal temperature or humidity changes.