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Sir-Our attention has been drawn by Mr. C. F. Fischl, of the Joint Fire Research Organisation, to a simplified method of calculating the fire endurance of timber beams. In the paper referred to* a family of curves is used (Figs. 7 and 8) to obtain the fire endurance (t) for various sizes of beams with different values of the ratio - applied load / ultimate load (v).
The paper describes the problems encountered and their solutions during the design and construction of a heavy welded steel framed mill building in a highly congested area at the Stocksbridge steelworks of Messrs. Samuel Fox & Co., Ltd.
During an inspection of the roof over the stage at the New Theatre, Northampton, it was discovered that the structure had sagged considerably and urgent measures were considered necessary to reinstate it.