Heartwood resistance to subterranean termite attack: R (resistant), NR (little or no resistance or unknown, so presumed not resistant), as specified in AS 5604-2005 Timber—natural durability ratings. Where there are no reliable resistance data for a timber, it is classified as NR (non-resistant) until authoritative, contrary evidence becomes available.
Note: Termite management systems. On 1 January 2001, the Queensland provisions of the BCA were amended to address the installation of termite management systems in Class 1 buildings (houses) and Class 10 buildings (sheds, garages, carports and greenhouses). Specifically, the provisions require termite management systems in new buildings (Building Codes Queensland 2000).