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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