Why Are There Different Slider Materials In The Guideline?
Four S rubber is an abbreviation for Standard Simulated Shoe Sole rubber. It was developed to simulate the performance of shoe soles of the period. It is now also known as Standard Pedestrian Hard Rubber or Slider 96. It has the advantage of being relatively insensitive to temperature. It is the most common material for pedestrian slip evaluation purposes. TRL/ Standard Pedestrian Soft Rubber was initially developed to simulate the rubber used in vehicle tyres. However as shoe sole materials have become softer it may give a better indication of slip resistance in some circumstances. It is particularly suited to measurements in areas where people are barefoot. It should preferably be used at 20ºC but a temperature correction can be made.
