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Structural composite lumber is a generic term that describes a family of engineered wood products that combine veneer sheets, strands or other small wood elements with exterior structural adhesives to form lumber-like structural products. Examples of structural composite lumber include oriented strand board, laminated veneer lumber and parallel strand lumber. One important benefit to both LVL and PSL is that the veneering and gluing process enables large timbers to be made from relavively small trees of many species, thereby providing for efficient utilization of wood fiber resources. In addition, structural composite lumber is generally much stronger and stiffer than traditional sawn lumber because many of the natural strength reducing characteristics of sawn lumber, such as knots, can be removed during the manufacturing process. Also, structural composite lumber won't warp or twist like sawn lumber.