SERVICE INVESTIGATION OF VARIOUS TYPES OF JOINT BARS ON SANTA FE AND NORTHWESTERN RAILWAYS

This report covers the service investigation of various types of joint bars and variations of bolt spacing on the Atchison, Topeka and Santa Fe Railway near Streator, Illinois and on the Chicago and Northwestern Railway at Sterling, Illinois. 1. All design of joint bars have been adequate throughout the service period of 16 years. 2. Four bolts in 36 in joints with 9 - 9 1/8 - 9 in spacing are adequate to hold the rail, but do not provide sufficient rail end support, hence, create additional batter and droop of the rail ends compared with 6-bolt bars. 3. There appears to be little difference in the performance of the current AREA bolt hole spacing of 6 - 6 - 7 1/8 - 6 - 6 in compared with the 6 1/2 - 6 1/2 - 5 1/8 - 6 1/2 - 6 1/2 in spacing where such a comparison can be made in the Santa Fe test. Inasmuch as the current AREA spacing has been shown to produce less stress concentration at the bolt holes and this service test has shown no disadvantage in other respects, it has confirmed the desirability of continuing the current AREA bolt hole spacing.

  • Supplemental Notes:
    • Conducted under sponsorship of AREA Committee 4 - Rail.
  • Corporate Authors:

    Association of American Railroads Research Center

    3140 South Federal Street
    Chicago, IL  United States  60616
  • Authors:
    • Lamport, L R
  • Publication Date: 0

Media Info

  • Features: Figures; Photos; References;
  • Pagination: 6 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00095877
  • Record Type: Publication
  • Source Agency: Association of American Railroads
  • Files: TRIS
  • Created Date: Jul 24 1976 12:00AM