Rail Straightness and corrugation measuring

LMATS  Digital Straightness and corrugation measuring services for increased track safety by, the condition of the track, significant points or any rail flaws are detected and digitally documented by the LMATS  rail measurement technician on-site

LMATS uses an electronic straightedge for  Straightness and corrugation assessment, the corrugation measuring function allows us to determine both straightness and short-waved components of the actual geometry. The Digital Rail Straightness and corrugation measuring equipment allows for the measurement of slope angle as per AS 1085.20 which allows assessment to Alignment tolerance grade AT1 which is not possible with a traditional steel straight edge. See Table Below **

rail inspection

LMATS inspect for straightness measurement of gauge face and running surface and for corrugation measurement of longitudinal rail profiles.
Determination of these flaws or surface anomalies is possible by using different wavelengths of which 4 can be used:

  • 10-30 mm
  • 30-100 mm
  • 100-300 mm
  • 300-1,000 mm.

The measurements on the rail are digitally transferred to a handheld device where they are stored on a computer and can be displayed and documented later. The measurement data is uploaded directly so it can be analyzed and accessed later.

digital assessment of rail straightness

The LMATS Rail Straightness and corrugation inspection NDT solution techniques are:-
Fast, Accurate, Traceable a digital paper trail

Advantages of a Digital Rail Straightness and corrugation assessment

  • High-precision measurement results with respect to the straightness and surface quality of rails and when it comes to the location of corrugation
  • Comprehensive electronic documentation of straightness and corrugation measurements after grinding work to protocol the acceptance of the measurement result on-site
  • Geolocation coding for the report
  • Fast acquisition of measurements
  • Highly accurate
  • Repeatable
  • Traceable

rail stratghtness test 1rail stratghtness test 2

Benefits of Digital Rail Straightness and corrugation assessment:

  • Lower maintenance costs by monitoring the wear of the rail and wheel interface, find a flaw before it becomes major
  • Aids in the precise track positioning
  • On-site analysis of the measurements possible
  • Extensive digital measurement records and documentation
  • Straightness measurement for welding, fishplate and insulated joints after maintenance
  • Measurement of short, medium and longwave track defects and corrugations

The Technical bit

Measuring length 1 m and up to 5 m via overlap
Horizontal resolution 500 points
Linearity error ± 0.5 %
Measuring range +1 -2 mm
Vertical resolution 0.001 mm
Display resolution 0.01 mm
Measuring time 6 sec
Ambient temperature -10°C +50 °C
Rail temperature -20°C +60 °C
AS 1085.20 Alignment tolerance grade AT1
Vertical 0.0 - 0.3 mm
Horizontal ± 0.05 mm
Maximum slope angle on top of Rail  ± 7 mm  **


** Measured over a distance of 100mm along the rail surface and 50mm either side of the weld centre line. 

Contact us today and find out how an LMATS Digital Rail Straightness and corrugation assessment can ensure the safety and integrity of your tracks.