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HOW IS SLIP MEASURED?

Coefficient of friction (COF) is the measurement of a tile's frictional resistance, closely related to traction and slipperiness. Both static and dynamic measurements can be taken. Static coefficient of friction (SCOF) is the frictional resistance one pushes against when starting in motion. Dynamic coefficient of friction (DCOF) is the frictional resistance one pushes against when already in motion. For SCOF and DCOF, a slip occurs when pushing off with more force than the surface can resist. That can happen when the angle of the force changes (e.g., pushing off harder while pressing down less) or when the floor surface becomes more slippery than anticipated.

While many tile products still show a "COF" value, many manufacturers have stopped reporting coefficient of friction per the ASTM C1028 method because the standard for tile floors has changed. There is now a >0.42 requirement, measured per the DCOF AcuTest℠, for level interior tiles that will be walked on when wet.

Slip Resistance may also be measured using a Pendulum Test.
Class 0: Dry indoor areas only.
Class 1: Dry indoor with slope less than 6 degrees.
Class 2: Wet indoor areas (e.g. bathrooms, kitchen, pool surrounds). Dry indoor areas with slopes or stair steps.
Class 3: Indoor areas where, as well as water, other lubricants are present that can reduce slip resistance (e.g. commercial kitchens, garages, industrial floors, etc.). External areas.

Shade Variation Rating: MODERATE

Clearly distinguishable texture and/or pattern within similar colors.

Green Squared® involves one industry, one standard, and one mark and covers the gamut of products used in a tile installation. As the first multi-attribute sustainability standard developed for tiles and tile installation materials, Green Squared uses the transparency and consensus of the ANSI process combined with third party certification to evaluate, validate, and communicate products which have a positive impact on the environment and society.

Green Squared covers product characteristics, manufacturing, end of product life management, progressive corporate governance, and innovation in an effort to establish sustainability criteria for products throughout their full lifecycle.

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