Royal Tweed Bridge

It was designed by L.G. Mouchel & Partners, with consulting engineers Charles Bressey and J. H. Bean, and the contractors for construction were Holloway Brothers of London. A bridge had first been proposed in 1896, and a scheme was produced in 1914, but the outbreak of the First World War meant that plans were put on hold until 1924. The A1 River Tweed Bridge, which opened in 1984, now carries the A1 road about a mile to the west of the Royal Tweed Bridge, reducing its importance as a crossing of the Tweed. It is a Grade II* listed building in recognition of its innovative design and striking scale.

The bridge is built from reinforced concrete and consists of four unequal arches, with approach viaducts at each end. The northern end of the bridge is higher, and towards that end the spans are longer. The spans are of lengths , , and , and the approach viaducts are and long. The spans consist of four arched ribs, solid in the case of the shortest span and hollow for the longer spans. Columns rise from the ribs and are connected at the top by longitudinal beams, which support perpendicular beams that carry the roadway. The piers and abutments are constructed from mass concrete, and there are expansion joints and a system of wind braces over each of the piers. The parapets are made of…