Discussion on The Fabrication of a 90-ton Welded Crane Girder By E. Ibbotson, M.I.Struct.E., and and

The site of the factory extension to be described extends from North Woolwich Road to the River Thames and covers approximately eleven acres. A wharf extends along almost the whole of the river frontage and is provided with 2-ton travelling electric cranes. Although it was necessary for the owners to have access to this wharf for outgoing goods during the progress of the works, the wharf was not used to receive materials or plant, and all such traffic was by road. Frank G. Etches

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.