The relationship of slip resistance (or coefficient of friction) to safe climbing system maneuvers on high profile vehicles has become an issue because of its possible connection to falls of drivers. To partially address this issue, coefficients of friction were measured for seven of the more popular fabricated metal step materials. Evaluated on these steps were four types of shoe materials (crepe, leather, ribbed-rubber, and oil-resistant-rubber) and three types of contaminant conditions (dry, wet-water, and diesel fuel). The final factor evaluated was the direction of sole force application. Results showed that COF varied primarily as a function of sole material and the presence of contaminants. Unexpectedly, few effects were attributible to the metal step materials. Numerous statistical interactions suggested that adequate levels of COF are more likely to be attained by targeting control on shoe soles and contaminants rather than the choice of a particular step material. The tabular data were collapsed into a regression equation which allows one to predict what available slip resistance (or COF) values can be expected with any combination of the evaluated variables.


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    Title :

    Slip Resistance Predictions for Various Metal Step Materials, Shoe Soles and Contaminant Conditions


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Truck and Bus Meeting and Exposition ; 1987



    Publication date :

    1987-11-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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