INVESTIGATION OF SPECIAL JOINT BARS AND RAIL PLUGS FOR USE IN JOINING LENGTHS OF CONTINUOUS WELDED RAIL

This report covers laboratory tests of two completely assembled special rail joints with rail plugs (Dutchmen) to determine if such joints will stand up under traffic. A member road developed the special joint for use in connection with laying continuous welded rail at low temperatures and requested that tests be made in the rolling load machines at the Technical Center. It was felt that this subject matter would be of interest to other member roads and arrangements were made for tests of two joints. The purpose of the rail plug with a special length joint is to provide means of adjusting expansion of continuous lengths of rail laid at low temperatures withoug creating an additional joint for a short length of rail used by some railroads when joining continuous lengths. The special joints are made of regular cross section design, metallurgy and heat treatment, but the bars are lengthened to provide for the length of the plug and the spacing between the center bolt holes increased a corresponding amount. In laying continuous welded rail at below mean temperatures, the special joints with plugs would be used, the length of joint and plug being selected according to the amount the rail temperature when laying was below the mean temperature. At some later and convenient date, when the rail temperature was near the mean temperature the special joints and plugs would be removed, rail anchors removed to allow the rail ends to close the gap, and regular joint bars applied. The special joints and plugs would then be held for use on the next rail laying job as needed.

Media Info

  • Features: Figures; Photos;
  • Pagination: 2 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00097255
  • Record Type: Publication
  • Source Agency: Association of American Railroads
  • Report/Paper Numbers: ER-7
  • Files: TRIS
  • Created Date: Jul 29 1976 12:00AM