- Standard value based on US ADA, OSHA, UL, and ASTM -
Measured coefficient of friction
Dangerous level
over 0.80
Very Safe
0.60 ~ 0.79
Safe
0.50 ~ 0.59
Relatively Safe
0.40 ~ 0.49
Dangerous
0.35 ~ 0.39
Very Dangerous
0.00 ~ 0.34
Unusually Dangerous
ADA:Americans with Disabilities Act / OSHA:Occupational Safety and Health Administration / ASTM:American society for Testing Materials
Wet
Dry
UL and ASTM(Normal)
Over 0.5 may not cause slip for normal people
ADA
MUST over than 0.6
After TILE SLIP-STOP
0.7 - 0,9
After COATING SLIP-STOP
1.0
According to ASTM F 1679-96 for wet testing and ASTM C 1028-96, it was resulted not to over 0.5 that the coefficient of friction for wet floor without treatment of slip-protection product. As a result of that, so wetted floor has low coefficient of friction that normal people may easily slip on those floors.
Therefore it is best to treat slip-protection product onto floors have less than 0.5 of frictional coefficient.
Slip Tester
