New customer? Register here

The gold standard for laboratory accreditation in the construction industry

Search for an Accredited Lab







Calibration that ensures data is accurate and repeatable

"We recognize they’re very effective at what they do and they pretty much lead the pack in that regard, so that’s why we lean on them."


California Division of the State Architect

Eric France, Construction Supervisor II

re_graphic
50 years of experience
3,000+
PSP participants
23,000+
samples shipped per year
1,000
laboratory assessments per year
1,900+
accredited labs







Falling Weight Deflectometer Documents

Go to Complete Document Library

FWD-Related Articles

Go Complete Newsletter Archives

  • The Importance of FWD Calibration

    Falling-weight deflectometers (FWDs) are used to collect important data that is used to characterize layer stiffness, and for planning maintenance and rehabilitation activities on highways and other major roads. Accurate data collection leads to a better prediction of maintenance and rehabilitation needs, which in turn leads to more effective planning and budgeting of these activities. Unfortunately, it is estimated that at this time only about half of the FWDs in use in the United States are regularly calibrated. This article will describe the primary sources of measurement error in FWD data collection and how the calibration protocol is used to effectively minimize these errors.
    Full story
TwitterLinkedIn