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Related Experiment Videos

Floor/shoe slip resistance measurement.

D B Chaffin1, J C Woldstad, A Trujillo

  • 1Center for Ergonomics, University of Michigan, Ann Arbor 48109-2117.

American Industrial Hygiene Association Journal
|May 1, 1992
PubMed
Summary

This study investigates shoe-floor friction, measuring static and dynamic coefficient-of-friction (COF). Results highlight hazardous low COF conditions and question the reliability of certain testing devices and literature values.

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Area of Science:

  • Occupational Safety and Health
  • Biomechanics
  • Materials Science

Background:

  • Numerous devices estimate static and dynamic coefficient-of-friction (COF) between footwear and flooring.
  • Variability in shoe materials, floor conditions, and contaminants leads to inconsistent COF estimates.

Purpose of the Study:

  • To review the physics of slip measurement devices.
  • To experimentally determine static and dynamic COF values under realistic occupational conditions.
  • To identify conditions leading to hazardous low COF.

Main Methods:

  • Review of fundamental physics principles governing friction measurement.
  • Experimental determination of COF under simulated job-specific conditions.
  • Analysis of factors influencing COF, including shoe material, surface type, and contaminants.

Main Results:

  • Identified specific conditions resulting in low, hazardous COF values (e.g., hard Neolite soles on wet, smooth surfaces).
  • Demonstrated significant variability in COF estimates based on testing parameters.
  • Highlighted potential limitations of light-load testing devices.

Conclusions:

  • The study questions the universal applicability of static and slow-speed COF values found in existing literature.
  • Results emphasize the need for realistic testing conditions to accurately assess slip hazards.
  • Findings inform the development of safer footwear and flooring materials.

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