WAYS AND MEANS OF REPAIRING OR REPLACING EXPANSION ROLLERS UNDER BRIDGES

SOME OF THE PROBLEMS ASSOCIATED WITH EXPANSION DEVICES AS USED ON INTERMEDIATE AND LONG-SPAN STEEL RAILWAY BRIDGES ARE EXAMINED. THE ROLLER-TYPE DEVICE IS CHIEFLY CONSIDERED BUT OTHER TYPES OF EXPANSION DEVICES ARE ALSO MENTIONED. THE PURPOSE OF THE EXPANSION ROLLERS ON STEEL BRIDGES IS TO ALLOW THE STEEL TO EXPAND OR CONTRACT DUE TO TEMPERATURE CHANGES, AND TO ALLOW THE STRUCTURE TO DEFLECT UNDER LOAD. THIS ARTICLE CONSIDERS THE EXPANSION DEVICE HAS BECOME INACTIVE WHEN IT WILL NO LONGER ALLOW THE REQUIRED FREE LONGITUDINAL MOVEMENT OF THE SPAN TO WHICH IT IS AFFIXED OR WHEN IT HAS WORN OR DETERIORATED TO THE POINT THAT IT WILL ALLOW EXCESSIVE TRANVERSE MOVEMENT AT THE END OF THE SPAN. THE TOOLS AND EQUIPMENT AND THE MAINTENANCE METHODS USED TO REPAIR OR REPLACE THE EXPANSION ROLLERS ARE DESCRIBED.

• Supplemental Notes:
  • 73 Ann Conv, PP 35-39
• Corporate Authors:

  American Railway Bridge & Building Association

  18154 Harwood Avenue
  Homewood, IL  United States  60430
• Authors:
  • Prober, W H
• Publication Date: 1968

Media Info

• Serial:
  • American Railway Bridge & Building Assoc, Proc
  • Publisher: American Railway Bridge & Building Association

Subject/Index Terms

• TRT Terms: Expansion; Maintenance; Maintenance equipment; Metal bridges; Methodology; Railroad bridges; Repairing; Rollers; Steel bridges
• Uncontrolled Terms: Replacing
• Subject Areas: Highways; Maintenance and Preservation; Vehicles and Equipment;

Filing Info

• Accession Number: 00218558
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 13 1970 12:00AM