Patent ID: 8088494

Claim:
An engineered elongate structural lumber product of square or rectangular cross section and having a length L greater than 2.4 m, said engineered elongate structural lumber product comprising a laminate having a width face to face of at least four engineered laminae of identical rectangular cross-section, the engineered laminae (a) having a width of at least a full dimension on one transverse axis of the structural lumber product, (b) being layered serially to provide, with accumulated cross-sectional thickness of mutually adhered engineered laminae, at least another full dimension of the structural lumber product on the other transverse axis of the structural lumber product, (c) having at least the length L; and (d) being derived from end-wise jointed uniform laminar thickness boards or sticks of less than the length L of rectangular section and of no greater than 17 mm thickness and of a width not substantially greater than the width of the square cross-section or lesser dimension of the rectangular cross-section of the product, (e) being each from a ranked stream of contributing sticks, the sticks of each stream being ranked by a stick by stick test, post drying, for a strength or stiffness, or both, characteristic into a ranked category; and (f) being each derived from said sticks of said thickness less than 17 mm ranked by such characteristic or characteristics into at least three ranked categories; a profiled layering of said engineered laminae across said another full dimension of the structural lumber product, profiled by the ranking of the contributing sticks of each engineered laminae and the strength or stiffness, or both, characteristic to derive the MOE distribution wanted for the structural lumber product.