ULTRASONIC AND MAGNETIC PARTICLE TESTING OF THE WASHINGTON & MAIN STREET RAILROAD BRIDGE TRUSS PINS AND EYEBARS

The Washington & Main Street Railroad Bridge is located in downtown Norwalk, Connecticut, on the heavily traveled northeast corridor mainline. Designed in 1895, this bridge is a single span steel structure consisting of three parallel through trusses, each separated by two tracks. The truss members frame together at common panel points consisting of 8-in. (20-cm) diameter circular steel pins. During visual inspection of the bridge section loss due to surface corrosion was observed in many of the bridge's 62 pins. Considering the bridge's age, importance and heavy service load, it was desired to verify that the pins are in sound functional condition and void of any damaging or threatening internal defects or flaws. This was accomplished using ultrasonic testing. Initial results of the procedure indicated possible discontinuities in 5 of the 62 pins tested. Ultrasonic response to the discontinuities identified in the 5 pins varied in magnitude from broad based to narrow sharp spikes. The investigation concluded the truss pins are in no immediate need of replacement. It was, however, decided that the 5 suspect pins should be re-tested using a calibration reference that is more representative of the pins' material and dimensional characteristics. Also, magnetic particle inspection of the external truss eyebars was performed to determine if any service induced cracking has occurred. Methodology and results from the ultrasonic and magnetic particle testing programs are presented.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/1566769493
• Supplemental Notes:
  • This entry in the TRIS database is made from the hardback copy of the conference proceedings, which are also available on CD-ROM.
• Corporate Authors:

  Technomic Publishing Company, Incorporated

  851 New Holland Avenue, Box 3535
  Lancaster, PA  United States  17604
• Authors:
  • Yost, J R
  • Assis, G
• Conference:
  • Structural Materials Technology IV - An NDT Conference
  • Location: Atlantic City, New Jersey
  • Date: 2000-2-28 to 2000-3-3
• Publication Date: 2000

Language

• English

Media Info

• Features: Figures;
• Pagination: p. 301-306

Subject/Index Terms

• TRT Terms: Corrosion; Defects; Flaw detection; Inspection; Pins; Railroad bridges; Trusses; Ultrasonic tests
• Uncontrolled Terms: Eyebars; Magnetic particle testing
• Subject Areas: Materials; Railroads;

Filing Info

• Accession Number: 00793140
• Record Type: Publication
• ISBN: 1566769493
• Files: TRIS
• Created Date: May 8 2000 12:00AM