An ordinary General Meeting of the Institution of Structural Engineers was held at 11, Upper Belgrave Street, London, S.W.l, on Thursday, February 26th, 1942, at 1 p.m., when a paper entitled “Design of Doubly Reinforced Beams and Tests on Construction Joints” by Mr. E.G.S. Powell, B.E., A.M.Inst.C.E., A.M.I.Struct.E., of New Zealand, was presented. Mr. W. K. Wallace, M.Inst.C.E., M.I.Struct.E (President), was in the Chair.
A SINGLY reinforced rectangular beam designed in accordance with the provisions of the cbde of practice for A 1:2:4 concrete with steel to B.S.S. No. 15 stressed to 20,000 lbs./in.2, has a value for Q (= MR/bd2) at working load of from 130 to 206, according to the quality of the concrete. If such a beam is tested to destruction the ultimate value of Q is unlikely to reach two and a half times the above values. R.H. Squire