What are the slip resistance standards for granite outdoor trash can bases?

Granite is a popular choice for outdoor trash can bases due to its durability and aesthetic appeal. However, ensuring its slip resistance is crucial for public safety, especially in wet or icy conditions. The primary standards governing slip resistance for such applications are ANSI A137.1 and ASTM C1028. ANSI A137.1, the American National Standard for ceramic tile, provides a classification system where a Dynamic Coefficient of Friction (DCOF) of 0.42 or higher is recommended for level interior spaces expected to be walked on when wet. While designed for tiles, this standard is often referenced for polished granite surfaces in outdoor settings to ensure sufficient traction. For a more direct measurement, the ASTM C1028 standard determines the static coefficient of friction (SCOF) of horizontal walking surfaces. A SCOF of 0.60 is widely considered the benchmark for a non-slip, safe surface for level pedestrian walkways. For sloped areas, a higher SCOF is required. When specifying granite for trash can bases, it is essential to request test data from suppliers confirming that the material meets or exceeds these critical safety thresholds, thereby minimizing the risk of slips and falls in public spaces.