Correspondence on The Longitudinal Bending Behaviour of Composite Box Girder Bridges Having Incomple

The parameters affecting the ultimate shear capacity of two-bay prototype beams have been examined using dimensional analysis; in particular, the importance of web slenderness and flange stiffness has been demonstrated. Design charts, which take into account the postbuckling behaviour of the web, have been proposed for beams having a clear web depth up to 600 mm. Values taken from the charts indicate that the current design procedure for beams with slender webs grossly underestimates their shear capacity. B.O. Hilson and P.D. Rodd

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.