Falling Weight Deflectometer (FWD) Su

Falling Weight Deflectometer (FWD) Survey


FWD survey are undertaken in accordance with the guidance provided in the DMRB HD 29/08. Test spacing are established, with testing usually undertaken in the nearside wheel track of the running lanes (on single carriageway, testing is required in both directions). There must be no standing water on the road surface at the time of the survey and care must be taken to ensure that the whole area of the plate is in contact with the surface

To assist reporting of data, the pavement temperature is measured at regular intervals in accordance with HD 29/08.