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A Code of Practice for bridges (BS 5400) is currently being written, and those parts of the Code that relate to concrete bridges have been published. The purpose of this paper is to give the background to the Code clauses that are concerned with crack control in concrete bridges. Particular emphasis is given to certain clauses that do not appear in the current building Code because they are concerned with structural forms or stress situations that occur in bridges but not in buildings, e.g. reinforcement not perpendicular to cracks, and deep voided slabs. Where appropriate, the Code clauses and their implications are compared with present bridge design practice.
L.A. Clark and G. Elliott
The introduction of new automatic welding plants, which can deal with sections up to 3.8 m deep and weights up to 50 t, happens to coincide with the completion of work on methods of producing optimum design for welded plate girders. The paper describes the operation of the plant and the methods available for obtaining optimum designs.
In its comment to the Department of Industry on the recommendations of Engineering our
future-the report of the Deportmental Inquiry under the Chairmanship of Sir Monty Finniston-the Council of the Institution, in concert with the Institutions of Civil and Municipal Engineers, said that to establish a new Engineering Authority, as proposed, to monitor education and training and to register professional engineers in the United Kingdom was wholly misconceived and dangerous. Control of such matters should be left in the hands of the engineering profession.