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Quality of steel There has been some correspondence in this column concerning the variability of the strength of structural and rein forcing steel. Mr G. T. Collett takes the opportunity to point out another type of variation in quality: Regarding the quality of structural steel, I feel duty bound to warn other members of our recent experience. Remedial work to a school in Corby involved the installation of a pair of steel beams and stanchions to support a sagging reinforced concrete roof. The beam section specified was 610 x 305 x 149 kg UB and the span approximately 10.5 m. Verulam