Abstract
The effect of CCA and NaPCP type preservatives on the compression strength parallel to the grain of radiata pine sapwood was determined. Blocks treated at 12 retentions ranging from 0.15 to 5.0 kg/cm 3 were stored for 3 years under conditions simulating those of structural timber. The most uniform conditions for the tested material (density, retention, moisture) were assured. Results for treated wood varied around the mean value of untreated wood. Statistical analysis showed these variations to be insignificant. Thus one can assume that CCA and NaPCP (at the retentions used here) did not have any practical effect on the compression strength.
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