A standard Falling Weight Deflectometer (PAVE®FWD-TM) is a trailer mounted non-destructive testing device used to determine the stress/strain parameters of pavements and subgrades.


A four way split specially designed loading plate is placed on the surface of the pavement and a load pulse is applied to the plate. The load pulse is generated by the impact of a falling weight. The load pulse is designed to cause a deflection that closely simulates the deflection caused by a wheel load passing at normal speed.

The software is simple and intuitive to use, operating on a standard Microsoft Windows XP platform. It displays results immediately after each test and creates standard excel documents of each test or series of tests for further data analysis. It also supports multiple languages.

Enhanced Digital Geophones supplied as standard to eliminate electrical interference giving greater accuracy in deflection readings.

Features & Benefits

  • UK manufactured based on a proven international design to ASTM D 4694
  • Automatic controlled load adjustment for greater accuracy
  • Quick and easy to operate - just 28 seconds to perform a standard test
  • Ambient, ground and asphalt temperature sensors as standard
  • Safety interlocking system
  • Calibrated to AASHTO R-32 international standard by qualified engineers
  • Output File format, in CSV, PDDX, MDB, F20, F25, PAV


  • Upgradeable to 23 deflection sensors
  • Configurable load plate dimensions
  • Two way video Camera System for load plate monitoring
  • Global Positioning Data recorded at each drop location
  • PaveGPR ? Ground Penetrating Radar for Layer Thickness measurements


  • 3900x1700x1400mm
  • 7 - 150kN Load Range
  • Power Source 12V DC - no generator required
  • Repeatable to within 1%
  • total machine weight 450kg
  • Ultrasonic Drop Hight sensor
  • Highway Approved Trailer