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52550
  
  

  5
Sep
2018
Technical Reports
Inspection of Concrete Ties Using Sonic/Ultrasonic Impact Velocity and Impact Echo Measurements
Author
          Federal Railroad Administration

Subject
                    Testing

**Keywords:** Concrete, crossties, ties, Rayleigh waves, impact echo, impact velocity
**Abstract:** This report documents NDT Corporation’s development of a non-destructive system for inspecting the internal condition of concrete crossties using sonic/ultrasonic impact velocity...
Report Number
              DOT/FRA/ORD-18/32

  Office
              RDI-21
    1
Oct
1976
Technical Reports
Special Bibliography Railroad Safety Reserach
Author
          Railroad Research Information Service

Subject
                    Accident Investigations,
                    Hazardous Materials,
                    Human Factors,
                    Testing

**Keywords:** Track Design; Car Design; Locomotive Design;  Control Systems; Life Cycle
**Abstract:** This Special Bibliography prepared from the magnetic-tape files of the Railroad Research Information Service, contains selections which were accessioned between 1973 and 1976....
Report Number
              FRA ORD&D 76-280

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