Discussion on the Ultrasonic Testing of Concrete

THIS paper describes an experimental examination of the behaviour of webplates subjected to bending stresses applied in the plane of the plate. K. C. Rockey and F. Jenkins

IN North America the high preload bolt, or the high strength bolt as it is more commonly known, is rapidly replacing the hot driven rivet and black bolt as the means of making site connections in structural steelwork. In the United Kingdom increasing use is being made of this new technique. F. M. Easton, E. M. Lewis and D. T. Wright

This month's letters discuss foundations in shrinkable ground and highlight a survey on structural optimisation in practice.