FALLING WEIGHT DEFLECTOMETER (FWD)
The FWD is a non-destructive testing device used to evaluate the structural condition of pavements for rehabilitation projects, research, and pavement structure failure determinations.
To determine the pavement condition it is necessary to measure the deflection of the pavement under prescribed loads using standardised procedures. This can be done using automated devices such as Falling Weight Deflectometer (FWD) and the Deflectograph.
The FWD was developed in Europe and has been available for use as a test device for over 30 years.
Selecting the type of rehabilitation to be used for given situation is of considerable economic significance and to arrive at that decision without any knowledge of the structural condition of the pavement may be expensive.