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Posted By pol
Hi, Is anyone aware of a correlation between the R9-R13 values (DIN 51130 and DIN 51097) and the Rz microroughness values? I understand that the former relate to the Coefficient of friction and that there is a strong correlation between Rz values and the CoF. However does anyone know of a conversion/constant that can be used to convert Rz to R9-R13 ? Thank you and I hope this makes sense.
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Posted By pol
Thanks Flic, I have had a look at that doc and it has helped to some degree. So the manufacturer can quote R9-R13 each value representing a range of slip coefficients, the floor is laid, and several years later after several accidents we measure the surface roughness with a roughness meter which provides values in Rz which indicate low med signif high slip risks. We return to the client / landlord and say the flooring may be unsafe and need to adopt a different procedure etc He says the floor was R11 when laid and I want a result in those values before I do anything ! argh Fridays are not meant to be like this.
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Posted By safetyamateur
pol, not sure I fully understand the query but, here goes.
The ramp test is a notoriously unreliable measure of slip risk (helpful chap plodding up and down a ramp which gets raised and covered with water etc. until he slips). The manufacturer's safety data should also give pendulum test values, which are the truest measure.
There's no way you can ramp test an existing, worn & torn floorcovering unless you cut out a representative piece that will cover a ramp-sized object and send it off to, I dunno, the HSL. Even then, you'd want them to pendulum test it to give the truest measure.
How about you go to the manufacturer, get the safety data on pendulum values. You'll know straight away if you've got a problem.
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Posted By pol
Thank you for your response, I have contacted HSL for advice regarding the existance of conversion factors etc. I shall also try to access the data sheets with pendulum results from landlord or manufacturer and potentially undertake more testing.
thank you for your advice.
Paul
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