Government Offices, Horseferry Road, London SWl. Discussion on the paper by H. E. Mills CEng AMlStru

A 3 storey 2 bay x l bay full-size, rigid-jointed, steel frame has been designed in accordance with the Joint Committee Report on Fully Rigid Multi-Storey Welded Steel Frames (December, 1964). R.H. Wood, F.H. Needham and R.F. Smith

A steel-framed switchhouse, designed for the Central Electricity Generating Board, proved unusually sensitive to wind loading. Calculations show that repeated wind loading, together with random application of live loading, will lead to incremental collapse at a of incremental collapse and alternating plasticity relatively low load factor. The phenomena single and two-storey frames, and the results are first discussed with reference to simple of model experiments are presented. Sample detail calculations are then given for the switchhouse, showing how a practical plastic design may be made for (a) static collapse under vertical loads only, and (b) static collapse with added wind load. The columns having been designed elastically, the whole structure is then analysed for its sensitivity to incremental collapse and alternating plasticity, and the shakedown load factor is determined. J. Heyman, R.P. Johnson, P.P. Fowler and I.P. Gillson

Niamh McCloskey reflects on her personal experience of the challenging reality of returning to work after maternity leave, questioning whether workplaces truly support women in this transition and highlighting how, with the right support and recognition of the new perspectives and skills that motherhood can bring, we can retain mothers and allow them to thrive in underrepresented industries.