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The Structural Engineer, Volume 47, Issue 12, 1969
A series of tests is reported on 40 beams in which the total amount of steel and the amount pre-stressed was varied. Most of the beams were reinforced and pre-stressed with 5 mm (0.2 in) diameter wires, while there were a few tests of beams with pre-tensioned strand and beams with post-tensioned wires. The programme included tests under short-term, sustained and repeated loading. The results are used to analyse the stress in the tensioned and untensioned steel and to consider the factors affecting the flexural strength, crack width and deflection in order to make tentative recommendations for limit state calculations. E.W. Bennett and N.J. Dave
It is hoped that these reports of the performance of candidates in the Institution Parts 1, 2 and 3 examinations held in July 1969 will be of help to those who are preparing for future examinations and to those members and others responsible for teaching or guiding potential candidates.
This paper is concerned with the explanation of the theory of metric dimensional co-ordination in so far as it relates to the structural framework of a building. It follows through the planning and design processes necessary to arrive at a point where either the structure itself can be built as a series of dimensionally co-ordinated components or if is capable of accommodating the maximum number of nonstructural components. The historical background to dimensional co-ordination is touched on, and the advantages to be gained to the construction industry by changing to metric by this means are given. The paper is intended to be an explanation of the work of Functional Group Panel No. 1 and the contents of the British Standards and other PD documents issued by the British Standards Institution on the subject of Dimensional Co-ordination in Buildings. The conclusion is reached that there is now sufficient information available to commence designs for new structural engineering works using the system of dimensional co-ordination. P.B. Edwards