PTV values for R9 – R12 surfaces

June 2018

Slip Risk PTV rangeLow ≥ 36

Moderate 25-35High ≤ 24

0.0000%

0.0001%

0.0010%

0.0100%

0.1000%

1.0000%

10.0000%

100.0000%

10 20 30 40 50 60PTV

Risk of Slip100%

10%

1%

0.1%

0.01%

0.001%

0.0001% 1 in 1,000,000

1 in 100,000

1 in 10,000

1 in 1,000

1 in 100

1 in 10

Classification Angle of Slip Slip RiskR9 6° - 10° High

R10 10° - 19° High/ModerateR11 19° - 27° Moderate/LowR12 27° - 35° LowR13 > 35° Low

Collected Data• Wet and Dry PTV values were collected• 360 samples with Wet PTV values ranging from 10 to 64

0

2

4

6

8

10

12

14

16

18

10 15 20 25 30 35 40 45 50 55 60 65

Freq

uenc

y

Wet PTV

R12R11R10R9

0

1

2

3

4

10 15 20 25 30 35 40 45 50 55 60 65

Freq

uency

PTV

R12

0

1

2

3

4

5

6

7

8

9

10 15 20 25 30 35 40 45 50 55 60 65

Freq

uency

PTV

R11

0

1

2

3

4

5

6

7

8

9

10

10 15 20 25 30 35 40 45 50 55 60 65

Freq

uency

PTV

R10

0

2

4

6

8

10

12

14

10 15 20 25 30 35 40 45 50 55 60 65

Freq

uency

PTV

R9

In Conclusion• The Pendulum and DIN 51130 are not measuring the same thing

• Floors with an R12 or R13 rating should provide low risk in wet conditions, although the sample tested was quite small

• R11 floors tend to be good in the wet, but a few floors that appear to have high risk in wet conditions could still achieve this rating

• R10 floors are typically laid in areas unlikely to get wet, however, 32% of those tested may be suitable for wet conditions

• R9 floors should remain dry in use, although a small proportion of samples appear to provide better slip resistance than expected

• As a manufacturer• Do not rely on the DIN 51130 “R rating” alone• An additional pendulum test may

• represent the slip potential of the floor more favourably• highlight where seemingly good floors may have problems in wet conditions