Steelwork in Transit Shed 102, Southampton Docks Discussion on the Paper by Mr. F. M. Bowen and Mr.

THE problem of the simply-supported rectangular beam having a single circular hole is investigated for the case of bending with shear. An approximate mathematical analysis is presented along with the results of a photoelastic investigation. Results are also given for a rolled steel joist with a circular hole in its web from measurements with acoustic and electrical resistance strain gauges. J. E. Gibson and W. M. Jenkins

THIS paper describes the design and construction of a new fire-resisting floor to the auditorium, and improvements to the orchestra pit and entrance staircase made during the summer of 1955. C. H. Hockley

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