Slip Resistance

Wet Testing Results Interpretation Guide – National Construction Code Requirements (AUS)

Interpreting Wet Test Results

How to interpret your wet test report

Wet test results offer six possible outcomes- classification 'P0', 'P1', 'P2', 'P3', 'P4' or 'P5'.

The classification 'P0' reflects a lesser slip resistant surface, while 'P5' classification reflects the greatest slip resistance classification.

There are two parts to this interpretation guide – Firstly the 'National Construction Code requirements', and secondly 'Other Particular Applications' recommendations.

For the 'Global Product Classification' test results refer additional #Note below.

Step 1
Note the test location described in the left side column of your report, and the corresponding test result 'P' classification achieved (listed in the far right side column)
Step 2
From this interpretation guide, identify the most appropriately related location description described in either 'TABLE 3A' (Part 1) or 'TABLE 3B' (Part 2) . Note the 'P' classification listed to the right of this description.
Step 3
If the test result classification listed meets (or exceeds) the related 'P' classification from 'TABLE 3A' or 'TABLE 3B', the test surface is meeting the relevant requirement.
#Note
For 'Global Product Classification' test reports the 'TABLE 3A' or 'TABLE 3B' descriptions assist in identifying the product's suitability for various applications.

National Construction Code Compliance Classifications

*Table 3a NATIONAL CONSTRUCTION CODE COMPLIANCE CLASSIFICATIONS Minimum wet pendulum test result classifications to meet National Construction Code requirements.
Location Wet pendulum test
Stair Treads and Stairway Landings in Buildings - Covered by NCC Volumes 1-2  
Stair treads and a stairway landing (when dry) P3
Stair treads and a stairway landing (when wet) P4
Nosings for Stair Treads and Landings in Buildings – Covered by NCC Volumes 1-2  
Dry stair tread, a stair non-skid nosing strip and a stairway landing P3
Wet stair tread, a stair non-skid nosing strip and a stairway landing P4
Ramps in Buildings – Covered by NCC Volumes 1-2  
Ramps not steeper than 1:14 (4.1 degrees) gradient (when dry) P3
Ramps not steeper than 1:14 (4.1 degrees) gradient (when wet) P4
Ramps steeper than 1:14 (4.1 degrees) up but not steeper than 1:8 (7.1 degrees) (when dry) P4
Ramps steeper than 1:14 (4.1 degrees) up but not steeper than 1:8 (7.1 degrees) (when wet) P5
*Table 2 Classification of Pedestrian Surface Materials according to the AS 4586-2013 wet pendulum test
Classification Pendulum* mean BPN
Four S rubber TRL rubber
P5 >54 >44
P4 45-54 40-44
P3 35-44 35-39
P2 25-34 20-34
P1 12-24 <20
P0 <12 -

Treatment Options

For test results that achieve a result below recommendations, the following treatment options are available to increase slip resistance and Reduce Your Risk!

While ISTS is solely an audit service, following is a short list of common types of treatments we see our clients using to improve the slip resistance of various pedestrian surface materials.

Cleaning procedures
Minimising detergent residue build up or other contaminants.
Acid etching
Increasing surface texture.
Coatings and sealers
Surface coatings and penetrative types.
Surface texture
Coatings, etchants, sandblasting, shot blasting, etc.
Surface replacement
May be the most cost effective option in some instances.

An internet search for 'flooring treatments' will identify surface treatment professionals in your local area. ISTS recommends sourcing a number of detailed proposals when considering treatments, outlining expected slip resistance improvements, visual changes, clean ability and life expectancy.

Additional Notes & Reference

References

*Table 3A – HB198:2014 "Guide to the specification and testing of slip resistance of pedestrian surfaces" Standards Australia Limited 2014.

*Table 2 – AS 4586-2013 "Slip resistance classification of new pedestrian surface materials".

nb. The information provided is intended as a guide only, consult the referenced publications for further information in regards to measurement results and recommendations.

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