The Lay-out and Construction of Highways. Discussion on Mr. W.J. Hadfield's Paper

IT is proposed in the following pages to write generally on the theoretical and practical aspects of elastic stability. No doubt part, of the ground covered is already familiar, but it is considered necessary to include the elementary principles, so that there may be as few gaps as possible in the argument. Thus we may have some idea of the theoretical effects of various combinations of loading and end conditions and it may then be seen to what extent we are justified in relying on any particularly fixed or stlereotyped method of design for such a wide range of conditions. A. Noel Procter

This month's letters include discussion over design checks and suitably experienced engineers as well as seismic design of masonry and more.

The tragedy of the Francis Scott Key Bridge highlights the need for structural engineers to ensure that the risks inherent in our built infrastructure remain acceptable, argues Colin Caprani.