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The 15 m to 45 m (50 ft to 148 ft) span range is representative of the majority of bridges encountered in motorway, principal and trunk road schemes. The difference between an expensive and an economical bridge originates from a few very simple decisions at the design stage. The purpose of the paper, therefore, is to offer a few suggestions at a practical level the adoption of which should generally lead to economic solutions for the more regular bridge situations. M.V. Woolley
The design and construction of a number of short span road bridges which were built to replace older structures in an urban area are described. G.T. Williams
Several bridges which have been designed by the author's firm are described. The reasons for the choice of designs are given and the methods used in analysis and some detail problems are described briefly. Emphasis is placed on choosing a simple and natural design to suit the particular bridge problem and developing this in a sympathetic way with regard to the final appearance; careful attention being given to details. G. Duncan