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Traditional Grading System Updated for Structural Lumber
Snapshot: The Forest Products Laboratory has traditionally provided unbiased information on the properties, characteristics, design, and use of structural wood products to groups and agencies that develop or control standards for ensuring public safety and health. Because of its reputation, the laboratory was called upon by the American Lumber Standard Committee Board of Review to assist in the review of proposed revisions to the Southern Pine Dimension Lumber Design Values.
Forest Service researcher conducts an in-grade bending test on Southern pine. David Kretschmann, USDA Forest Service