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The Structural Engineer

In most cases of compound beams and built-up girders it is customary, in order to obtain an economical design, to vary the moment of inertia of the section throughout the length of the beam by curtailing the flange plates in accordance with the reduction of the B.M. at the respective sections. F.H. Thomas

The Structural Engineer

To the EDITOR of The Structural Engineer. SIR,-A point which has been much stressed recently (namely, that all local authorities who have control over buildingshould be empowered to permit the use of welding in steel structures, subject to specified codes of practice), has again been brought to the notice of engineers, in the discussion which followed Mr. Helsby's paper.

The Structural Engineer

It has been realised for a number of years that the present form of strength test included in the British Standard Specification for Portland cement has a very limited relation to the strength properties required from the cement in practice. Although the test is of value in so far as it may provide an assurance that the cement, when used with sound aggregates, will produce mortars and concretes of adequate strength for many purposes, it does not place the various marketed cements in an order of strength which can be related in any known way to the strength of products made from the cement. W.H. Glanville

The Structural Engineer

This is Fred May’s impression of some of the members and guests present at the Annual Dinner of the Institution, which was held at the Dorchester Hotel, London, W., on the 23rd March. The sketch is reproduced by courtesy of “The Architects’ Journal.”

The Structural Engineer

MR. EWART S. AKDREU’S, B.Sc., M.1nst.C.E.. (Vice- President), proposing a very hearty vote of thanks to Mr. Helsby for his interesting paper, said he had read a number of papers on the subject of welding, but in this paper Mr. Helsby struck entirely new ground, and had given much interesting and helpful information. Presumably he had not considered it within the scope of the paper to state the relative costs of a riveted and a welded structure, but no doubt many members of the Institution would be very interested to have some information on that matter.

The Structural Engineer

IN olden days there was little distinction between an engineer and an architect, and Leonardo da Vinci, for example, was the greatest engineer as well as the greatest architect of his time, but he probably would have been very surprised if anybody had attempted to separate these two functions of his activity. Oscar Faber