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The paper describes briefly the developments leading to the need for the appraisal of structures containing elements in high alumina cement concrete; it is based on the author’s experience as consulting engineer and as Convenor of the Institution’s Informal Study Group on High Alumina Cement Concrete. General information is provided on methods of appraisals used, tests, monitoring methods, and factors of safety. The need for further basic and independent research into the various uses of high alumina cement, past and future, is stressed. A.S. Safier
Earthquake forces Mr R. J. Pugh seems to reach the same conclusions as Mr R. Farnborough (October 1980) on this subject. He writes: With reference to the letter (June 1980) of Messrs Coverman and Clarke on the subject of earthquake loadings I think that many engineers will agree with Verulam's comment at the end of the letter - namely, that other countries have their own requirements. Verulam
Friarton Bridge over the River Tay at Perth is a multispan bridge comprising two independent welded steel box girders, each with a composite lightweight concrete deck slab. The bridge is notable for being one of the first in the United Kingdom to use structural lightweight concrete in its construction, which made composite construction economic for the river span; also for being the first major structure to be designed to the ‘Interim Design and Workmanship Rules’ (successor to the ‘Merrison’ Rules). O.A. Kerensky, J. Robinson and B.L. Smith