Copper, chrome and arsenate (CCA) treated wood has a very successful history of use in New Zealand, for at least 60 years. In many parts of the world, CCA has been used for timber treatment since the mid-1930s. In this report, data are presented on the performance of CCA treated pine stakes and poles. Results from ground contact durability tests at Scion and other overseas test performance data suggest that increasing the retention of CCA gives improved durability. Hence it is likely that if the retention of CCA in radiata pine is 1.65% TAE (Total Active Element) a service life of 100 years is not unreasonable.

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