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ANSI A326.3 American National Standard Test Method for Measuring Dynamic Coefficient of Friction of Hard Surface Materials—2021
3.0 Specification
3.1 DCOF ≥ 0.42*: Unless otherwise declared by the manufacturer, hard surface flooring materials suitable for level 2 interior spaces expected to be walked on when wet with water shall have a measured wet DCOF value of 0.42* or greater when tested using SBR testfoot material and SLS solution as per this standard. However, hard surface flooring materials with a measured wet DCOF value of 0.42* or greater are not necessarily suitable for all projects. The specifier shall determine materials appropriate for specific project conditions, considering by way of example, but not in limitation, type of use, traffic, expected contaminants, expected maintenance, expected wear,3 and manufacturers’ guidelines and recommendations. 3.2 DCOF < 0.42*: When tested using SBR testfoot material and SLS solution as per the procedure in this standard, hard surface flooring materials with a measured wet DCOF value of less than 0.42* (including by way of example, but not in limitation, polished surfaces), unless otherwise declared by the manufacturer, shall only be installed when the surface will be kept dry when walked upon and proper safety procedures will be followed when cleaning the hard surface flooring materials. Hard surface flooring not intended to be walked upon when wet shall have a dry DCOF value of 0.42* or greater when tested per Section 10.0 of this standard. 1 The values determined by this test method reflect the dynamic friction between the testfoot and the hard surface.

3.4 Manufacturer-Declared Product Use Classification: … INFORMATIVE NOTE: Hard surface flooring materials with a measured wet DCOF value less than 0.42* are often used in areas such as shopping malls (outside the food court), hotel lobbies, office buildings, etc. where a certain appearance (e.g. glossy) and ease of cleaning are highly desired and measures are in place to keep the floor dry when walked upon.

4.1.4 Exterior, Wet: See Section 3.4. (Manufacturer-Declared Product Use): Product shall be manufacturer-declared for this category based on manufacturing parameters, internal quality control criteria, and manufacturer experience with similar surfaces. Attributes to consider include, but are not limited to, product size, texture, structure, and additionally in wet applications, drainage. Products meeting Exterior, Wet criteria may require frequent maintenance to keep clean. INFORMATIVE NOTE: Possible Areas of Use: Subject to determination by specifier and the criteria in this standard, may include, but are not limited to, level outdoor living spaces including pool decks, walkways, patios, and sidewalks, where such floors may be walked upon when wet (excluding ice or snow) if level, clean, maintained, and free of standing water or other contaminants.