Design Resources

DCOF Ratings

Choosing the right Crossville tile for commercial applications

Crossville adheres to DCOF AcuTestâ„¢, the new standard for measuring coefficients of friction to better support tile selection in commercial applications. We are among the first in the industry to implement this new standard for all of our product collections.

It’s important to note that not all products with a DCOF value over the recommended 0.42 standard are suitable for all applications. Type of use, expected traffic and wear, contaminants, maintenance and manufacturer guidelines must also be considered when specifying a product.

For more information on DCOF, visit the TCNA website at www.tcnatile.com

DCOF Chart

Ratings for all Crossville products are available in our comprehensive DCOF chart.

Product Finish Wet DCOF Range
Empire PO 0.22-0.32
Buenos Aires Mood PO 0.31-0.41
Cross-Colors PO 0.31-0.41
Retro Active PO 0.31-0.41
Virtue SHT 0.31-0.41
Altered State UPS 0.42-0.52
Argent HON 0.42-0.52
Bluestone HON 0.42-0.52
Bohemia UPS 0.42-0.52
Color Blox/Color Blox Mosaics UPS 0.42-0.52
EcoCycle Americana UPS 0.42-0.52
Empire UP 0.42-0.52
Moonstruck HON 0.42-0.52
Nest UPS 0.42-0.52
Notorious HON 0.42-0.52
Shades by Crossville HON 0.42-0.52
Virtue UHT 0.42-0.52
Argent UPS 0.50-0.60
Basalt UPS 0.50-0.60
Bluestone UPS 0.50-0.60
Buenos Aires Mood TX 0.50-0.60
Buenos Aires Mood UP 0.50-0.60
Crossville Mosaics UPS 0.50-0.60
Cross-Colors UPS 0.50-0.60
Garden TX 0.50-0.60
Gotham UPS 0.50-0.60
Moonstruck UPS 0.50-0.60
Notorious UPS 0.50-0.60
Ready to Wear UPS 0.50-0.60
Reclamation UPS 0.50-0.60
Retro Active UPS 0.50-0.60
Shades by Crossville UPS 0.50-0.60
SpeakEasy UPS 0.50-0.60
Structure UPS 0.50-0.60
Vista Americana UPS 0.50-0.60
Cotto Americana UPS 0.58-0.68
Main Street UPS 0.58-0.68

How DCOF AcuTest Works

Friction is the force that resists the sliding motion of one surface against another, such as the motion of a foot against a tile floor. Contaminants, such as liquids, oil, dirt and debris, can alter the innate friction of a surface.

There are two types of friction: static (SCOF) and dynamic (DCOF). SCOF is the ratio of forces necessary to start two surfaces sliding. This is what the former ASTM C1028 static test measured. DCOF is the ratio of forces necessary to keep two surfaces sliding. The new DCOF AcuTest measures this ratio, which many manufacturers now believe better relates to the friction coefficient at work when a person slips on tile flooring.

The new 0.42 DCOF wet rating replaces the old 0.60 SCOF wet rating as the benchmark for friction in flooring applications.
The new, more stringent DCOF AcuTest uses a portable robot (the BOT 3000), an SBR rubber sensor and slightly soapy water (0.05% sodium lauryl sulfate solution) to measure dynamic friction. It’s a repeatable, reproducible method for measuring DCOF and, according to the TCNA, it is a major improvement over the old test method. It also offers a standardized minimum threshold, which is new to the industry.

5 Things You Should Know about DCOF

  1. The DCOF AcuTest measures DCOF, not SCOF
  2. DCOF AcuTest uses slightly soapy water instead of clean water for testing
  3. 0.42 is the new standard as measured by the DCOF AcuTest for interior flooring walked upon when wet
  4. The DCOF AcuTest is included in the latest version of ANSI A137.1 Specifications for Ceramic Tile
  5. All Crossville flooring products have been tested using this method