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Will she float? A new subject for the column has been brought forward in a letter from Mr A. L. Gilbertson writing from Epsom. At a recent Institution of Civil Engineers meeting to discuss Part 3 of the draft British Standard for maritime structures, there was a lively debate on the factor of safety that should be required against flotation. There were three aspects to consider: - an unforeseen rise in the water table - underprovision of self-weight due to low density or updersized members - a minimum margin of safety (per se) Verulam