What are the slip resistance test results for wet granite outdoor trash can surfaces?

Granite surfaces on outdoor trash cans present significant slip resistance challenges when wet, according to standardized testing protocols. Recent studies utilizing the ASTM E303 pendulum test method reveal that wet granite surfaces typically yield British Pendulum Numbers (BPN) between 20-35, which falls below the recommended safety threshold of 36 BPN for level pedestrian surfaces. The natural porosity and polished finish of granite creates a hazardous condition when moisture is present, as water fills microscopic surface imperfections and reduces friction coefficients to dangerous levels. Manufacturers and municipal authorities should consider alternative materials or apply specialized anti-slip treatments to granite trash can surfaces in high-traffic areas. Regular maintenance including prompt drying and the application of slip-resistant coatings can significantly improve safety metrics. These findings highlight the importance of material selection and surface treatment for outdoor furniture in public spaces, particularly in regions experiencing frequent rainfall or high humidity conditions.