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The Structural Engineer, Volume 66, Issue 11, 1988
Mr B. P. Pritchard (W. S. Atkins & Partners): I wish to add my tribute to Mr Hayward and his partner for a very bracing little paper. I wish they had talked a little more about BS5400, but they certainly showed a few of the structures which have given them quite a name in the production of structural steel bridges, a material which had gone into some decline until they took a hand in the matter.
There are no standards or recommended procedures for the design of prestressed concrete pavements; thus design of this type of pavement presents unique opportunities and challenges. It also presents a great opportunity to use fundamentally based engineering design methodology rather than the relatively common empirical methods. It is to be anticipated that, as lifecycle costs assume greater importance in the selection of paving solutions, the structural durability of prestressed concrete pavements will make them a competitive alternative, particularly if operational delay caused by maintenance work is a major factor. This paper presents a synthesis of technology appropriate to the design of prestressed concrete pavements. All features of the design calculation are considered, from defining the loading conditions through calculation of both wheel load stresses and those caused by environmental factors, to selection of appropriate limiting stresses for the concrete. Since design is a creative procedure, and designers should be free to use their creative talents to the full, where appropriate, alternative procedures have been described leaving individuals to select the method most appropriate to their needs. A.F. Stock
Many firms are, or should be, looking at the question of whether or not they should carry on their practice through a partnership, or whether they should change to practising through a limited company. J.J. Ward