STATUS OF COOPERATIVE RESEARCH ON WOOD TIES BETWEEN THE RAILWAY TIE ASSOCIATION AND THE AAR RESEARCH CENTER

Tie space was studied analytically using Talbot's formula, in laboratory tests using hydraulic pulsating loading jacks, and using test track on a field test. Cross ties of three cross sections, 6 x 8 inches, 7 x 9 inch, and 8 x 10 inch, and three lengths, 8 ft, 8.5 ft. and 9 ft. for a total of nine combinations, were used for all three tests. The study of the effects of tie size and spacing showed that irregularities in track cross level and rail surface are a function of the characteristics of the ballast and roadbed rather than of the tie arrangement. There is no evidence that the long ties are more effective in prevention of center binding, because the shortest ties so far show no evidence of center binding. It seems probable that the cross section and spacing of the ties will be determined by the bending strength required to avoid tie breakage at the center of the track or under the rail. Further service use will indicate whether the increased tie plate load with the wider tie spacing used in some test sections will result in an increased amount of tie plate cutting into the ties.

Media Info

  • Features: Appendices; Figures; Photos; Tables;
  • Pagination: 123 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00040041
  • Record Type: Publication
  • Report/Paper Numbers: #R-111 Res Rpt
  • Files: TRIS
  • Created Date: Jan 22 1976 12:00AM