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State Forests of NSW Log Specifications for Veneer and Plywood Production

Topics

Log Size

Log Quality

  • Core

    Maximum defect core allowable is 10 cm. The wood around the core should be solid to allow the lathe bolts to firmly grip the billet.

  • External Defects (length Defects)

    External defects which are not removed from the log by cutbacks, are allowed in limited numbers.

    These defects include

    Individual external defects are not to affect greater than 25 percent of the circumference of the bolt. The total maximum number of external defects allowed are;

    1. Less than 8 meters = 2
    2. Between 8m-12 meters = 3
    3. More than 12 meters = 4

    These defects are allowed under the following conditions;

    Internal Defects

    Roundness

    The difference between the maximum and minimum diameter at any point along the log shall not exceed 15 percent of the diameter at that point.

    Curly Grain

    Logs especially E. maculata showing curly grain, or ropy grain on the log surface are not acceptable. As cross grain makes it difficult for the veneer clipper to cut.

    Species

    Acceptable species are Blackbutt, Flooded Gum, Spotted Gum, Blue Gum, Turpentine, Red Mahogany, all Stringybark, New England Blackbutt, Messmate and White Gum.

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