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The assumption made by the authors that the bolt load produces a uniformly distributed pressure on the outer surface of the plate isuspect, to say the least, and it would have been useful to test this assumption by an analysis of the internal stresses in the bolt head. A study I have made shows that the yield strength of reinforcing steel (i.e. general grade) in Kenya has a coefficient of variation of 17 per cent. Given that
this applies also to structural steel, which is fairly certain, could the authors indicate the effect that this would have on their findings? They appear to presume that steel is an exact product.
The application of yield line theory to the ultimate load design of reinforced concrete skew slabs is considered in some detail. With a view to application in highway bridge design, the HA and HB load systems are considered. Bridge slabs with parallel and non-parallel abutments are investigated and the theoretical development is accompanied by the results of a series of experiments on model concrete slabs.
K.K. Gangopadhyay and W.M. Jenkins