Fire resistance of preservative-treated slash pine fence posts

Preservative-treated slash pine posts were subjected to a burning test to determine the effects of treatment and fuel load on their fire resistance. Posts treated with chromated copper arsenate (CCA-C), CCA-wax, and CCA-oil smoldered to destruction; however, those treated with CCA-oil were less likely to be destroyed after 2 hours of smoldering. Creosote-treated posts and untreated controls did not smolder to destruction. A high fuel load decreased the fire resistance of posts.

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