What are AS/NZS4586 & AS/NZS3661.1?

AS/NZS4586 is the current slip resistance standard in use in both Australia and New Zealand.  For level access routes expected to become wet with water in normal use, walking surfaces should have a SRV classification of not less than 39 from the wet pendulum test method.

AS/NZ3661.1 is an older standard which is still acceptable in NZ where a slip resistance value of 0.4 may be assumed as equivalent to a SRV of 39.