Is Wood Hardness Affected By Preservative Treatment?

Matched sections of kiln-dried and air-dried southern pine poles were treated with creosote, penta-petroleum, penta-volatile petroleum, CCA, Type C, or were left un treated. Hardness of all of the sections was measured. A slight decrease in hardness for the penta-petroleum- and CCA-treated poles was observed when they were kiln-dried. No significant effect on hardness was found for the other preservatives or for any of the air-dried sections.

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