SIR,-There are several things of interest to me in the July issue of The Structural Engineer .
THE building for which, at the time of writing, tenders are being called, is the new office in Christchurch, NZ., of the State Fire and Accident Insurance Department. The structural design was carried out along the lines which Mr. Norman Gregory has described in an article published in The Structural Engineer of August, 1931, and it is hoped that what follows may be of some value as a practical example of this method of design. C.W. Hamann
THE following notes and observations are intended to apply to such bridges as may be built by Local Authorities, designed by their engineer, and erected possibly by direct labour. It will later be evident that the subject has been viewed from the experience acquired principally in the past ten years in building fifty or sixty bridges and applies to spans up to and including about 120 ft. E. Taylor
The assessment suggested in these tables is an endeavour to crystallise the general ideas on which the writer has found practical designers to have worked in the past, and he has attempted to expand them on the basis of the L.C.C. Code of Practice in the hope that they will give some stimulus to discussion on the part of those designers who have to sort out the rather elaborate but necessary specification of restraints given in the Code, and award them to suitable construction. G.F. Rodmell
TENSION members in a structure are of definite and known strength, if the grade of the steel be known. The strength in a test can be predicted with small error. Edward Godfrey
General Description. The new Tyne Bridge (now known as the Tyne Bridge) built by Messrs. Dorman, Long and Co., Ltd., of Middlesbrough, was opened by the King on Wednesday, October l0th, 1928. It is a road bridge connecting the town of Gateshead, in the county of Durham, to the ancient and busy city of Newcastle, in Northumberland, and spans the river Tyne by a single arch which carries the roadway. C.F. Mountney