Floor/shoe slip resistance measurement.
Chaffin DB; Woldstad JC; Trujillo A
Am Ind Hyg Assoc J 1992 May; 53(5):283-289
Slip resistance tests for assessing the slip hazard of surfaces were discussed. The problem of injuries caused by loss of traction in the workplace was considered. All approaches to slip resistance measurement have assumed that the coefficient of friction (COF) developed between a shoe and a walking surface represents the appropriate slip rating (or protective quality) of the shoe/floor combination. Differences in shoe sole and heel materials, floor conditions, and contaminants used in the tests make interpretation of the COFs difficult. The physical principles underlying slip resistance tests were reviewed. The results of studies of static and dynamic slip resistance of neolite, leather, and crepe shoe materials pulled across wet or dry surfaces coated with smooth glossy or rough paints were summarized. The tests were performed with a computerized sled and load cell device. COFs measured under static conditions were consistently higher than those measured under dynamic conditions. Low dynamic COFs indicative of a slip hazard were obtained with leather shoe materials on wet or dry surfaces and neolite materials on wet surfaces. Crepe shoe materials yielded high COFs indicating a low slip hazard. COFs increased when the materials were tested on roughened surfaces under both wet and dry conditions. The authors conclude that static COFs greatly overestimate the safety of floors under most test conditions. The risk of loss of traction accidents is minimized by utilizing walking surfaces having a reasonable degree of surface roughness that are kept dry. Requiring shoes with soft heel and sole materials is warranted in work areas where high COFs are required.
NIOSH-Publication; NIOSH-Grant; Training; Safety-research; Walking-surfaces; Accident-prevention; Occupational-accidents; Laboratory-testing; Materials-testing; Footwear
Industrial & Operations Engr University of Michigan 2254 G G Brown Laboratory Ann Arbor, Mich 48109
American Industrial Hygiene Association Journal
University of Michigan at Ann Arbor, Ann Arbor, Michigan