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    Present Status of Results-Type Specifications for Treated Wood

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    A high percentage of the preservative-treated poles now being installed are purchased under so-called “results-type” specifications, where the average retention of preservative in a charge is determined by the assay of a composite sample of borings. The practice of purchasing piling under similar specifications is increasing. Considerable progress has been made toward the development of results-type specifications for treated lumber, but several questions concerning sampling technique remain to be resolved.

    Practically all inspections of treatments are being made at the treating plant, but there is a growing interest in inspection at the material's destination. The feasibility of assaying individual poles and piles is also being considered.

    For the present, inspections should be made at the plant whenever possible, and average retentions determined for each charge.

    Author Information:

    Baechler, R. H.
    Chemist, Forest Products Laboratory, Madison, Wisc

    Committee/Subcommittee: D07.06

    DOI: 10.1520/STP45121S