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At present, the requirements for structural concrete are specified in five different Codes of Practice. These Codes have been drafted at different times and it is not surprising that they differ considerably in those sections related to the specification and production of the concrete. This paper describes the development of the requirements for concrete in the Codes from 1934 to 1965. D.C. Teychenne
As most of the piers of viaducts act as cantilevers for horizontal loads at top, requiring greater rigidity at base along longitudinal direction, a new type of structural element is suggested which is expected to serve as pier with reasonable efficiency. Rigidity at bottom is not much needed if piers act as a whole, being framed by top capping beam. S.K. Kundoo and B.B. Maiti
As progress towards the change to metric gathers speed and new metric versions of the various structural Codes of Practice are published, there is a great deal of discussion about the metric units adopted to express force, stress and loading.