
COMPARISON OF REQUIRED COEFFICIENT
OF FRICTION FOR BOTH FEET
FOR STRAIGHT WALKING
Wen-Ruey Chang, Simon Matz & Chien-Chi Chang
Liberty Mutual Research Institute for Safety, USA
The required coefficient of friction (RCOF) is critical in determin-
ing whether a slip incident might occur. When using RCOF, most
researchers do not differentiate between the two feet of the same
participant under the same walking condition. This paper presents a
comparison of the RCOF for both feet of 50 participants under four
walkingconditions using a t-test.The results in the current study indi-
cated that 78% of the RCOF data showed a statistically significant
difference