Static Coefficient of Friction (SCOF) Test
The Cause and Physics of Slip and Falls on A Wet Floor
A slip occurs when water is trapped between the sole of a shoe and floor. No matter what the sole design or material and type of flooring present this physical occurrence is known as hydroplaning.
According to the U.S. Department of Energy a slip and fall study was conducted of workers within their facilities. The findings of this study showed that three-fourths of the indoor injuries reported involved water.
The measurement of Static Coefficient of Friction (SCOF) is the value used when measuring for friction between the sole of a shoe and floor.
The SCOF value for no friction is 0.0. The value of a wet tile floor is 0.2 and the closer the value is towards 0.0 the slipperier the surface.
Test Method for Measuring Wet SCOF of Common Hard-Surface Floors
Measurement Device: Binary Output Tribometer
Company conducting test: South East Environmental
Floor Surface: 12”x12” industrial grade tile with ¼” grout.
Area: 6ft.x10ft. (60 square feet)
Ambient Temperature: 76 degrees F
Air Flow: 82 CF/minute
Cleaning Agent: Envirox Concentrate 118
Concentration: 1oz per gallon
Number of tests: 9
SCOF Values: Average of 9 tests for each mopping system
|String Mop||Pre-soaked Flat Mop||SPILL MASTER|
|Evaporation time & SCOF Value:||.5 min = .20||.5 min = .20||0.5 min = .60|
|1 min = .22||1 min = .24|
|5 min = .33||5 min = .39|
|10 min = .49||10 min = .54|
|11.8 min = .60||9.1 min = .60|
The acceptable SCOF value established by the American Standards Association is 0.6 for a wet floor which may significantly reduce the possibility of a slip and fall injury.
Summary of Test Values: The string mop achieved 0.60 in 11.8 minutes, the pre-soaked mop achieved 0.60 in 9.1 minutes, and the SPILL MASTER achieved .60 in 30 seconds.