Skid resistance R11/B
The surface properties of ceramic floor tiles noticeably influence safety of movement. Skid resistance is evaluated according to a series of standards and defined methods: DIN 51097 Determination of skid resistance for wet surfaces in barefoot areas DIN 51130 Determination of skid resistance for work rooms and working areas with increased risk of skidding. In accordance with DIN 51130, floor tiles are categorized in groups designated R10 through R 13.
R9 Group slip angle 6 — 10°
R10 Group slip angle 10 — 19°: Ceramic floor tiles, e. g. in storerooms, small kitchens
R11 Group slip angle 19 — 27°: Ceramic floor tiles, e. g. in kitchens, sanatoriums, car washes, laundries, grinding shops
R12 Group slip angle 27 — 35°: Ceramic floor tiles, e. g. in meat processing areas, industrial kitchens, dairies
R13 Group slip angle > 35°: Ceramic floor tiles, e. g. for floors in slaughterhouses, oil refineries, tanneries.