. American engineer and railroad journal . rve to limitthe dimensions of the beam. The purpose of the suggestion is *Q modified as to conform in these respects to the head shown inFig. 2. Specification for Tests.—The committee has reconsidered thecurrent test specifications, and it believes that changes are de-sirable in the two respects referred to below. The present specifications require that, as a preliminary luthe deflection tests for both the No. i and the No. 2 beams, aload of 6,000 pounds be applied and then released; after whichthe load for producing deflection is applied. The committ
. American engineer and railroad journal . rve to limitthe dimensions of the beam. The purpose of the suggestion is *Q modified as to conform in these respects to the head shown inFig. 2. Specification for Tests.—The committee has reconsidered thecurrent test specifications, and it believes that changes are de-sirable in the two respects referred to below. The present specifications require that, as a preliminary luthe deflection tests for both the No. i and the No. 2 beams, aload of 6,000 pounds be applied and then released; after whichthe load for producing deflection is applied. The committeebelieves that the preliminary load for the No. I beam should bereduced to 4,000 pounds, and it so recommends. It is thoughtthat the change will result in more careful assembling of thebeam. The current specifications require no test for the ultimatestrength of the beam. On account of the diversity in beam de-signs the deflection test gives but little information concerningtheir ultimate strength. The committee, therefore, considers it.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
