Polesaver Rods are solid rods of wood preservative that are used as a groundline maintenance treatment to control biodeterioration in hardwood transmission poles in Australia. The rods are inserted in holes that are drilled in a prescribed manner to distribute the toxicants into the critical groundline region of the poles. To determine the influence of drilling patterns on the distribution of toxicants five test drilling patterns, including the prescribed method, were assessed in unseasoned pole-size stubs of tallowwood (Eucalyptus microcorys F. Muell). The distribution of toxicants was visually appraised and is reported for three of the drilling patterns. The results indicate that drilling patterns influenced the toxicant distribution. Two of the trial patterns appeared to provide improved distribution of toxicants for specific applications when compared with the prescribed pattern.

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