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THE PRESIDENT, introducing the lecturers, said he had known Professor Sparkes very well for many years. After graduating at the University of Bristol in 1932, he had worked for Dorman Long & Co., Ltd., where he had learned much about structural steelwork. Col. Kirkland remembered him there, particularly for his most brilliant handling of a compound loading problem solved by calculus. He had shown Professor Sparkes an arithmetical solution ; since then he had been a most able collaborator and a very dear friend. The Authors presented the paper, which was illustrated by many slides.
Simply-supported bridge-decks are frequently designed as grillages so that the interaction between longitudinal main members can assist the load distribution when the deck has to carry the abnormal heavy vehicle (the H.B. loading of B.S.153). The
analysis of simply-supported single-span grillages is now well established by the use of the ‘ quasi ’ slab technique. In recent years the number of continuous or otherwise statically-indeterminate bridge decksparticularly in prestressed concrete-has been increasing and where continuous decks have been adopted they have often been constructed with beams of varying depth and section properties. A demand has, therefore, arisen for an analytical technique for such continuous grillages.
A. Goldstein, E. Lightfoot and F. Sawko
Mr. Dorman: ‘Judging by the number of enquiries relating to the merits of various roofing systems received by the BCSA central office, Dr. Buchholdt is to be congratulated on producing a timely paper. It will be of considerable value to have this present study, with its summary of the state of the art in the design of tension
structures, and one would certainly hope that this paper will go some way towards bridging the “credibility gap” between research and development activity on the one
hand, and design practice on the other.'