Floor Surface Coefficient Friction

The slip resistance of ceramic tile in ordinary.

Floor surface coefficient friction.

One number represents the force needed to move one surface such as a shoe horizontally over another surface such as tile flooring. The other number represents the pressure exerted between the two surfaces. A common method to measure the coefficient of friction on a floor involves a leather shoe heel which has a 50lb weight placed on it before being put flat onto the floor it is being tested on. F f frictional force n lb.

F f μ n 1. There are standards that allow for these differences and safety direct america can supply the test data and safety standards to determine whether a particular flooring is appropriate. Reflecting its use on other hard surface flooring and incorporating parameters for test sample size and testing in as is conditions or under cleaned conditions ansi a326 3 test method for dynamic coefficient of friction of hard surface flooring materials was developed by a broad consensus of hard surface flooring stakeholders using the core. The friction force is the force exerted by a surface when an object moves across it or makes an effort to move across it.

When it comes to flooring measuring the coefficient of friction helps to establish how safe a surface is. Floor slip resistance testing is the science of measuring the coefficient of friction or resistance to slip accidents of flooring surfaces either in a laboratory before or after installation or on floors in situ. The smaller the value the greater the danger. Slip resistance testing or floor friction testing is usually desired by the building s owner or manager when there has been a report of a slip and fall accident when there has.

This coefficient is a measurement of the relative ability of various surfaces to resist the sliding or slipping of the selected material. Since this is a coefficient two numbers are involved. μ static μ s or kinetic μ k frictional coefficient. Astm c1028 coefficient of friction coefficient of friction test cof floor slip resistance standards osha osha slip test scof skid test.

It is the relation between these two numbers that determine slip resistance. Slip and falls occur when the coefficient of static friction is low enough to allow the friction force between the shoe and the floor to be. In the application of floor safety it is the coefficient of static friction that we are concerned about because even while walking a shoe is or should be motionless relative to the floor surface. For conventional shoes a concrete floor surface will yield a coefficient that is high enough about 0 55 to 70 to preclude the reasonable probability of slipping.

Coefficient of friction cof is a mathematical term used to describe the effect of dragging one substance shoe sole material over another flooring surface. The frictional force can be expressed as.