The following instructions are to build one MRSU with a roughness index of 1.36 in/ft (Duval et al. (2013)).
Materials
- Sixteen wooden slats (38" by 6" by ¾")
- Two PVC pipes (3 m in length, 2.375" in outside diameter)
- Thirty-two rubber strips (mountain bike tire tubes, approximately 10" in length)
- Thirty spacers (e.g., 1" diameter PVC pipes cut into 30 pieces with 2" in length).
Procedures
- Bevel the slats.
- Wrap the rubber strip around the PVC pipe and staple to the slat. Adequately stretch the rubber strip such that the pipe fits snugly.
Top view
Bottom view
- Attach all 16 slats to the PVC pipes placed in parallel with an approximate space of 2" between the slats.
- When used, place the spacers into the gaps between the slats to ensure the gap is 2".
References
Duvall, J., Cooper, R., Sinagra, E., Stuckey, D., Brown, J., & Pearlman, J. (2013). Development of Surface Roughness Standards for Pathways Used by Wheelchairs. Transportation Research Record: Journal of the Transportation Research Board, 2387, 149-156.
