ABSTRACT
of the bridge but this arrangement would mean that all the load was carried by the inner arch. To minimise member sizes the four arches had to share the load. Introducing bearings between the deck and the arches was considered. The number required would have been expensive and would lead to future maintenance difficulties. Instead the pairs of arches were separated to give spans for the concrete deck of 2.7Sm and 3.6m. This allowed the transverse steelwork supporting the deck to be omitted. Horizontal bracing members were used between the pairs of arches rather than cross bracing. A decorative parapet, echoing the circular motif of the arches, was to be provided supported on shaped precast cantilevers. Since this would not meet the standards for containment of vehicles, a separate standard P2 parapet was provided beside the highway.
