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The Structural Engineer

AN ordinary Meeting of the Institution of Structural Engineers was held at 11, Upper Belgrave Street, London, S.W.l, on Thursday, 25th February, 1943, when a paper entitled "Highway Road Tunnel under the Maas, Rotterdam,” was presented by Dr. K.W. Mautner, M.I.Struct.E: Mr. W.K. Wallace, M.Inst.C.E., M.I.Struct.E. (President), was in the Chair. A large number of guests attended the meeting; including members of the Royal Netherlands Institution of Engineers. Amongst the distinguished guests was His Excellency the Netherlands Minister of War, who was Minister of Public Works at the time of the preliminary work for the Maas Tunnel. Besides being Minister of War at present, Jhr. van Lidth de Jeudz is also Chairman of the Royal Netherlands Institution of Engineers.

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The Structural Engineer

The necessity of saving steel in war-time lends special interest to methods of increasing the strength of mild steel to reinforce concrete. I propose to discuss here the properties and use of a material, obtained from mild steel by a method known as the work hardening process. This is now receiving special attention since British Standard Specifications are being prepared for steel treated in this way. Dr. K. Hajnal-Konyi

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