The effect of age at harvest on bending and tensile properties of loblolly pine from the coastal plain

The effect of rotation age on strength and stiffness of lumber produced from unthinned loblolly pine stands in the Coastal Plain of Georgia was examined. Six stands representing 22-, 28-, and 40-year-old rotations were sampled. A stratified random sample of trees 8 to 16 inches in diameter at breast height was selected from each stand and processed into lumber. Dimension lumber from the study was tested for strength and stiffness in both static bending and tension according to the provisions of the American Society for Testing and Materials standard method D 198. The strength and stiffness in both bending and tension generally increased with increasing rotation age.

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