. American engineer and railroad journal . iry. Brake Head Hanger Hole.—In the circular it was proposed toincrease the size of the hanger hole sufficiently to permit theuse of a i-inch hanger as well as the %-inch hanger. The changewas suggested on account of the breakage of the Jg-inch hangerunder some conditions of service. To the inquiry on this pointseventeen replies were received, twelve of which advocated theproposed change. In the five other replies the change is op-posed only on account of the increased play which would be al-lowed when a J^-inch hanger would be used in the larger hole
. American engineer and railroad journal . iry. Brake Head Hanger Hole.—In the circular it was proposed toincrease the size of the hanger hole sufficiently to permit theuse of a i-inch hanger as well as the %-inch hanger. The changewas suggested on account of the breakage of the Jg-inch hangerunder some conditions of service. To the inquiry on this pointseventeen replies were received, twelve of which advocated theproposed change. In the five other replies the change is op-posed only on account of the increased play which would be al-lowed when a J^-inch hanger would be used in the larger some of these replies the ^i-inch hanger is held to be suf-ficiently strong, especially if it be made with a larger fillet atthe bend than is at present customary. After considering all thereplies, the committee has decided to recommend the proposedchange, and it believes that the edges of the hole ought also berounded out to permit the use of a filleted hanger. It, accord-ingly, recommends that the present standard brake head be so. desirable that the beam be finally tested to destruction, and that under this test the maximum load borne shall not be less than 20,000 pounds for the No. i beam, 38,000 pounds for the No. 2 beam, and it recommends that such tests be added to the specifications. Paragraph 2, under Brake Beams, on page 590 of the Pro-ceedings for 1909, is in conflict with the test specifications. Thecommittee recommends that it be omitted. Brake-beam Limit Outline.—In its circular, the committee pro-posed the establishment of an outline which should serve 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
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
