ASTM E3028-16e1 PDF Download

The ASTM E3028-16e1 standard provides a method for quantitatively estimating the roughness of a surface using longitudinal profile measurements. The standard defines the Wheelchair Pathway Roughness Index (WPRI) as a measure of surface roughness based on the concept of a true longitudinal profile, rather than the specific instrument used for measurement.

The standard highlights the importance of measuring profiles simultaneously for multiple wheel tracks, as the Multiple Wheelchair Pathway Roughness Index (MWPRI) is considered a better measure of surface roughness than the WPRI for individual wheel tracks. The roughness data obtained from this practice is useful in determining the vibration exposure experienced by a wheelchair user. This information is important as vibrations can be linked to pain and injuries in wheelchair users. By quantifying the vibration exposure through the WPRI of traveled surfaces, steps can be taken to minimize exposure and reduce the likelihood of pain and injury.