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An Ordinary Meeting of the Institution of Structural Engineers was held at 11, Upper Belgrave Street, London, S.W.l, on Thursday, February 17th, 1944, at 5.30 p.m., the President (Major A. H. S. Waters, V.C., D.S.O., M.C., M.Inst.C.E., M.I.Mech.E., M.I.Struct.E.) in the chair.
It is unfortunately impossible to give details of secret equipments, and this lecture is therefore mainly confined to the period prior to this War. It aims at describing the general problem presented to those engaged in the design of Military Field Bridging Equipments and the methods by which success is achieved. Thus in time it may form a background against which wartime developments will be seen in clearer perspective.
Colonel S.G. Galpin
Since the horizontal displacement will be the same for members CD and DE, we need only consider half of the framed bent, then (15) must be doubled for whole bent.