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Industries producing products that affect the tractive properties of the walkway surface encountered during the expected human gait have a need for standardized test methods for determining the nonslip properties, slipperiness, or coefficient of friction (COF) of walkway surfaces. A number of different test methods are employed currently. Until recently, only one method was formalized and issued by the American Society for Testing and Materials (ASTM) as an ASTM standard. This method is set forth in ASTM Test for Static Coefficient of Friction of Polish-Coated Floor Surfaces as Measured by the James Machine (D 2047-77). It is a laboratory procedure and not designed to be a field measuring method. The efforts of ASTM Committee D-21 were directed to designing a testing program which included four test methods. The purpose of the testing program was to establish several ASTM standards. The design of the program is described. The program did not include an evaluation of the methods for the purpose of determining the preferred method.
friction, coefficient of friction, skid resistance, test method
Consulting engineer, Safety and Industrial Systems Engineering, Altadena, Calif