WELDED RAIL ON BRIDGES

In a quarter-mile length of welded rail movement due to changes in temperature is confined to the 8 rail lengths at each end, with no movement taking place in the 21 rails in the center section. The action of welded rail on bridges is probably not too much different than that of jointed rail because of the resistance to slippage of rail ends in the joint bars. Consequently, the anchorage being used for jointed rail may be useful as a guide. On ballasted deck bridges, welded rail could be used and anchored in the manner used for open track and no consideration need be given to locating the rail joints off the bridge. On open-deck vaiduct spans, anchor every tie for 200 ft each side of any rail joint that falls on the span with two rail spring clips and elsewhere anchor alternate ties with two clips. On open-deck truss spans, box-anchor each tie in the open track for 200 ft at each end of the span. For spans up to 250 ft it would probably be satisfactory to use no anchors on the bridge except for perhaps two rail lengths at the fixed end and leave the span free to expand and contract at the expansion end. On Open-deck bridges, the welded rail could be used on timber, concrete or steel-beam trestles for any length of bridge with the same anchor pattern as used on open track if the rail joints fall 200 ft off of the bridge.

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  • Supplemental Notes:
    • This abstract is also contained in "A Bibliography on the Design and Performance of Rail Track Structures", September 1974, RRIS #072794, which was prepared for the Urban Mass Transportation Administration.
  • Corporate Authors:

    Simmons-Boardman Publishing Corporation

    508 Birch Street
    Bristol, CT  USA  06010
  • Authors:
    • MAGEE, G M
  • Publication Date: 1965-11

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Filing Info

  • Accession Number: 00072844
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 11 1976 12:00AM