Falling Weight Deflectometer

Nondestructive testing services consist of pavement structural evaluation through the use of a Falling Weight Deflectometer (FWD). The FWD is a system for performing nondestructive testing of roadway, parking lot, and airfield pavements, both flexible and rigid.

The results of the FWD testing can be used to evaluate the following key structural aspects of an existing pavement:

  • Pavement condition and load carrying capacity
  • Uniformity of the pavement structure
  • Strength characteristics of the individual pavement layers
  • Resilient modulus, or subgrade strength, of the underlying subgrade materials
  • Pavement deficiencies resulting from defective construction procedures
  • Load transfer efficiency of joints and cracks in rigid pavements
  • Detection of voids under existing pavements

Data collected from FWD testing as indicated above, and information resulting from the deduction of that data, are used to determine cost-effective designs and solutions to existing and future pavements.  The information, used in conjunction with AASHTO or applicable state or local pavement design guidelines and anticipated future traffic loading information, will provide the following pavement design and/or pavement management information:

  • Estimated remaining life of the pavement
  • Overlay requirements
  • Reconstruction or new construction pavement sections


Thank you again for your support on this project.  You (James Parker) and your team delivered exceptional service.

You are lucky to have an employee like Lena (Fowlkes). Her professionalism, flexibility, and can do approach to accommodate my needs were exemplary. She really went the distance to help make things happen. And her attitude/pleasant humor is hugely appreciated.

Equally up to par is field fella Chris (Newberry). He is always a pleasure to have at the site and makes it happen, no matter how we jostle around the work and call in a panic.

Look forward to more successful projects with the help of good people like you have (at Kumar).

Working at Kumar & Associates has been a great experience. The company treats its employees with the utmost respect and appreciation. The mentorship and coaching for me as a young engineer has been a blessing and has helped me grow as I work towards my P.E. The company is privately held, employee-owned, and well-established in the industry. I am thankful for the opportunity to work here and the investment that has been made in me by Kumar & Associates.