Dynamic Effects in Railway Bridges

0N pages 355 to 363 in the August Number of The Structural Engineer was published a short article "On a new method for the practical use of Modern Pillar Formulae." The suggested method involved the use of two Tables of constants, Tables Nos. 1 and 2, which were given on pages 357 and 359, respectively. For the sake of brevity these Tables were calculated for ratios of l/g at intervals of 5 together with the differences to enable the intermediate values to be determined. W. Cyril Cocking

WELDED construction is rapidly increasing in popularity throughout the whole world. In Australia and New Zealand it has become a very important branch of Structural Engineering, and in the United States of America it is said to be the eighth industry in order of importance; Germany has a very comprehensive building code applied to welded construction and, in that country, Structural Engineers are building more and more by means of welding. In the writer's opinion, Italy has up to the present time, tackled the most spectscular structural efforts in Europe in so far as welded construction is concerned: buildings of 13 storeys are being erected in Italy and such buildings are about twice the height allowed by the London Building Authorities for buildings in London. America, however, can easily beat the Italian record with sky-scrapers of 18 and 19 storeys and each containing miles of welded joints. C. Helsby

THE work which forms the subject of this paper can most conveniently be considered as two distinct undertakings, namely, the reconstruction of the Pier Head and the provision of a new approach viaduct supporting an additional line of way, with reconstruction of existing platforms adjacent thereto. C.J. Jackaman