{"id":5750,"date":"2026-07-08T13:50:50","date_gmt":"2026-07-08T06:50:50","guid":{"rendered":"https:\/\/amco.co.th\/?p=5750"},"modified":"2026-07-08T16:13:18","modified_gmt":"2026-07-08T09:13:18","slug":"slip-resistance-rating-explained","status":"publish","type":"post","link":"https:\/\/amco.co.th\/en\/slip-resistance-rating-explained\/","title":{"rendered":"Slip Resistance Rating Explained: 3 Tests (PTV, R11, DIN) and What’s Actually Safe"},"content":{"rendered":"\n

A slip resistance rating<\/strong> is a measured score that tells you how much grip a floor gives \u2014 the higher the number, the lower the slip risk. The three you’ll meet most are PTV<\/strong> (a pendulum test; 36 or above = low slip risk<\/strong>), R9\u2013R13<\/strong> (a shod ramp test for how steep a surface you can walk without slipping), and barefoot classes A\/B\/C<\/strong> (a barefoot ramp test for wet areas). They come from different<\/em> tests, so you can’t convert one into another \u2014 you read them side by side.<\/p>\n\n\n\n

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Table of Contents<\/h1>\n\n\n\n
    \n
  1. What is a slip resistance rating?<\/li>\n\n\n\n
  2. What is PTV (Pendulum Test Value), and what’s safe?<\/li>\n\n\n\n
  3. What do R9\u2013R13 slip ratings mean?<\/li>\n\n\n\n
  4. What is the barefoot A \/ B \/ C class?<\/li>\n\n\n\n
  5. Why are there so many standards? (EN 16165)<\/li>\n\n\n\n
  6. How do I read a slip-test report?<\/li>\n\n\n\n
  7. What slip resistance rating does amco achieve?<\/li>\n\n\n\n
  8. FAQ<\/li>\n<\/ol>\n\n\n\n
    \n\n\n\n

    1. What is a slip resistance rating?<\/h2>\n\n\n\n

    A slip resistance rating is a measured number that describes how much friction a floor surface provides underfoot \u2014 in other words, how likely someone is to slip on it. Instead of guessing whether a floor “feels grippy,” a rating gives you an objective figure from a standardised test, so you can compare surfaces and prove a floor meets a safe threshold.<\/p>\n\n\n\n

    The catch is that there isn’t one universal number. Different labs use different tests \u2014 a swinging pendulum, an inclined ramp with a person in boots, an inclined ramp with a person barefoot \u2014 and each produces its own kind of score. Below are the three systems you’ll actually see on a datasheet, what each measures, and the number that counts as safe.<\/p>\n\n\n\n

    2. What is PTV (Pendulum Test Value), and what’s safe?<\/h2>\n\n\n\n

    The Pendulum Test Value (PTV)<\/strong> is the most widely used slip resistance rating for real floors, measured with a pendulum whose rubber slider drags across the surface \u2014 dry and wet \u2014 to simulate a heel strike. The higher the PTV, the more grip. The standard method is BS 7976-2<\/strong>, and it’s the test UK safety bodies rely on because it works both in the lab and on site.<\/p>\n\n\n\n

    The safety thresholds are well established:<\/p>\n\n\n\n

    PTV<\/th>Slip potential<\/th><\/tr><\/thead>
    0\u201324<\/td>High slip potential<\/td><\/tr>
    25\u201335<\/td>Moderate slip potential<\/td><\/tr>
    36 and above<\/strong><\/td>Low slip potential (the safe target)<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    So on a PTV report, 36 is the line<\/strong> \u2014 a surface tested at 36 or higher (ideally in the wet<\/em> condition, which is the harder test) is considered low-risk. Anything below 25 is a red flag.<\/p>\n\n\n\n

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    3. What do R9\u2013R13 slip ratings mean?<\/h2>\n\n\n\n

    The R-value<\/strong> is a shod (shoe-on) slip resistance rating from a ramp test: a person in safety footwear walks up an oil-wetted ramp that tilts steeper and steeper until they slip. The steeper the angle they can handle, the higher the R-rating. The method is DIN 51130<\/strong>, and it’s the rating most quoted for industrial and workshop floors.<\/p>\n\n\n\n

    R-value<\/th>Ramp angle (approx.)<\/th>Typical use<\/th><\/tr><\/thead>
    R9<\/td>6\u00b0\u201310\u00b0<\/td>Dry indoor areas, entrances<\/td><\/tr>
    R10<\/td>10\u00b0\u201319\u00b0<\/td>General wet areas, some workshops<\/td><\/tr>
    R11<\/strong><\/td>19\u00b0\u201327\u00b0<\/strong><\/td>Industrial wet\/oily floors, kitchens<\/strong><\/td><\/tr>
    R12<\/td>27\u00b0\u201335\u00b0<\/td>Heavy industrial, food processing<\/td><\/tr>
    R13<\/td>above 35\u00b0<\/td>The most demanding wet\/oily environments<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    For most factory wet or oily areas, R11 is the practical benchmark<\/strong> for good grip, with R12\u2013R13 reserved for the harshest conditions.<\/p>\n\n\n\n

    4. What is the barefoot A \/ B \/ C class?<\/h2>\n\n\n\n

    Where people walk barefoot<\/strong> on wet floors \u2014 changing rooms, showers, pool surrounds \u2014 the shod R-value doesn’t apply. Instead there’s a separate barefoot slip resistance rating from a water-wetted ramp test (DIN 51097<\/strong>), graded A, B or C:<\/p>\n\n\n\n

    Class<\/th>Ramp angle (approx.)<\/th>Typical use<\/th><\/tr><\/thead>
    A<\/td>\u2265 12\u00b0<\/td>Barefoot dry-transition areas, changing rooms<\/td><\/tr>
    B<\/td>\u2265 18\u00b0<\/td>Shower floors, pool surrounds<\/td><\/tr>
    C<\/strong><\/td>\u2265 24\u00b0<\/strong><\/td>Pool ramps, steps into water \u2014 the highest barefoot grip<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    Class C is the top barefoot grade<\/strong> \u2014 the most slip-resistant of the three.<\/p>\n\n\n\n

    5. Why are there so many standards? (EN 16165)<\/h2>\n\n\n\n

    Because each test answers a different question: PTV measures a heel-strike on any floor, the R-value measures shod grip on a slope, and A\/B\/C measures barefoot grip on a slope. They’re complementary, not competing. Since 2021, several of these ramp methods have been consolidated under the European standard EN 16165<\/strong>, with the R and A\/B\/C classifications carried over \u2014 so you may see a datasheet cite EN 16165 alongside, or instead of, the older DIN numbers. The important point for a buyer: a single surface can carry more than one rating<\/strong>, and each one tells you about a different scenario. Never treat an R-value as if it converts to a PTV number \u2014 they’re separate measurements from separate tests.<\/p>\n\n\n\n

    6. How do I read a slip-test report?<\/h2>\n\n\n\n

    A few practical checks when a supplier hands you a slip resistance rating:<\/p>\n\n\n\n