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The Structural Engineer

BS 5268 is a compendium of Codes covering the structural use of timber. It brings together design stresses, design methods, and some general guidance on the structural use of timber. It covers the major structural uses of timber, particularly in buildings, and can be used as the basis for design of all timber structural members such as floor and ceiling joists, wall panels, roofs, trussed rafters, and fabricated structural components, such as glued laminated structures and plybox beams. It also covers related information for design against fire and protection against fungal decay and insect attack. BS 5268 is being published in seven Parts: J.G. Sunley

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The Structural Engineer

Most structural engineers will have been familiar with CP111 Structural recommendations for loadbearing walls, first published in 1948, revised in 1964, and metricated in 1970. The Code was amended from time to time but was lacking in guidance in several important areas, e.g. the lateral strength of walls and accidental loading. It contained a very short section on reinforced brickwork walls which was not sufficient to enable the material to be used in an economical way. The workmanship, nonstructural design, and some materials aspects of masonry, were dealt with in CP121 Code of practice for walling: Part l: Brick and block masonry, published in 1951 and revised in 1973. B.A. Haseltine

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The Structural Engineer

Almost all structural engineers in UK, and many others throughout the world, are very familiar with BS 449 The use of Structural steelwork in buildings. This has been the BS Code of Practice for the great bulk of structural steelwork in the building industry for some 40 years, during which time a number of amendments and updating have been introduced, including metrication. However, as with many old and familiar things time takes its toll; technical advances, many years of research work and practical experience, and developments in codification internationally, have all led to the inevitable need for a complete review and redrafting of our UK document. D.W. Lazenby

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The Structural Engineer

The traditional role of the British Standards Institution in coordinating the production of specifications defining the attributes of materials or products is readily understood. Its role in the preparation of Codes of Practice is perhaps not so clear. Certainly, it is not BSI’s intention to prepare ‘textbooks’ of good practice, although some Codes have attracted that criticism; nor is it intended that Codes should be regarded as sets of rules that demand strict adherence in all circumstances. I. Dunstan

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The Structural Engineer

BS 8110 replaces CP 110: 1972. The fields of structural concrete covered by the two Codes are identical: reinforced and prestressed, in situ and precast. The BS reference is rather misleading and is to be regretted since BS 8110 is a Code of Practice and not a Standard. There are no major changes in principle from the earlier edition, but the text has largely been rewritten with alterations in the order and arrangement of topics. The redrafting and alterations have been made in the light of experience of the practical convenience of using CP 110: 1972. D.D. Matthews

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The Structural Engineer

Dr. Narayanan paints a gloomy picture about the funding of research in universities, but it is important to notice that he is concerned not so much about the amount of the funding as about the dangers to engineering of the workings of the bureaucracy of funding. Prof. A. Bolton

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The Structural Engineer

Dr. J. B. Menzies (F) (Building Research Establishment): First of all, I congratulate the authors on bringing together a review of modified concretes which so clearly illustrates the very wide range of these materials that is available to structural engineers today.

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The Structural Engineer

In the context of the title of this colloquium, EuroCodes are definitely for tomorrow and, some would say, hopefully the day after! However, it is important to recognise the significance of the EuroCodes and be prepared for their eventual implementation-national interests have perhaps even less weight now that the 10 in Europe have become the 12!!

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The Structural Engineer

President’s diary Following his return from the annual dinner of the Scottish Branch, the President will take the chair at the first Ordinary Meeting of the new session on the evening of 10 October, on which occasion, also, he will present the sessional awards for 1983-84.

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The Structural Engineer

The August 1985 issue contained the statement by the then Secretary of State for the Environment, Mr Patrick Jenkin, that he had laid two sets of building regulations before Parliament. The Building Regulations 1985 supersede The Building Regulations 1976 on 11 November 1985. Because the technical requirements have mostly been recast in a functional form, the new regulations are 25 pages long compared with the present 306. The new regulations will be supported by approved documents issued by the Secretary of State which give practical guidance on how to comply with the requirements. The approved documents refer to British Standards, and it should be a simpler matter to update the approved documents as and when appropriate than to change the references to deemed-to-satisfy documents under the present regulations. In the case of means of escape in case of fire there is no approved document because the mandatory rules for means of escape in case of fire, published by HMSO in July 1985, apply. There is also a Manual to the Building Regulations which contain the regulations, explains the new systems of control, and provides a link between the technical requirements and the approved documents.

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The Structural Engineer

PI/P2 Interchange is an elevated road of complex geometry currently under construction in Tuen Mun New Town, Hong Kong. The superstructures are of post-tensioned, prestressed concrete box girder construction, constructed span by span. Design was to BS 5400, as amended by the Hong Kong Public Works Department. R. McGowan and J.P. McCafferty

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The Structural Engineer

I do not propose to go over the history of the Institution’s involvement with structural Codes-I briefly summarised this in my paper ‘Codes and standards in design and in regulation’ presented at the Institution’s Anniversary Conference in 1984. The Institution has been actively considering its present and future role, and efforts are being made to act on the conclusions that have been arrived at. Professor M.R. Horne

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The Structural Engineer

Undergraduate training The May issue of The Structural Engineer contained a paper ‘An undergraduate training project-construction of a reinforced concrete grandstand’ by Mr R. Hulse, Mr M. K. Hurst, and Professor W. H. Mosley, of the Nanyang Technological Institute in Singapore. It described a practical project for second year students which was aimed at providing them with a background to their studies of design and construction through involvement in building a fullscale grandstand in rein forced concrete. The authors have now written to say that they have received a considerable number of interested comments on the project. They also wish to clarify their involvement in the exercise and give credit to all those concerned. Their letter reads: Since publication of our paper, considerable interest has been shown regarding the origins of the innovative educational concepts and training techniques that led to the construction project described. Verulam

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