Development of Surface Roughness Standards for Pathways Used by Wheelchair Users: Final Report

Engineered vs. Outside

Figures 15-17 show the vibrations at the seat, footrest and backrest respectively with the engineered and outside surfaces separated. The seat values are of particular importance because vertical vibrations transferred through the seat of a seated individual are the most hazardous. The high R² values for the engineered surfaces show that vibrations for a particular surface can be predicted by knowing the surfaces roughness. The lower R² values for the outside surfaces show that there is a larger variation of data.

Figure 15: RMS for Seat

Figure 16: RMS for Footrest

Figure 17: RMS for Backrest