Patent ID: 7547488

Claim:
An oriented strand board panel comprising: a top surface layer having a substantially planar body comprised of a plurality of wood-based strands wherein the plurality of wood-based strands has a first strand angle defined by an average deviation from a longitudinal axis of the top surface layer wherein the first strand angle is approximately positive/negative 15 degrees to 30 degrees, and wherein the top surface layer has a top surface strand density; a core layer adjacent to the top surface layer wherein the core layer comprises a plurality of wood-based strands having an alignment in a direction non-parallel to the longitudinal axis of the top surface layer, wherein the core layer has a core layer strand density that is-greater than the top surface layer strand density; a bottom surface layer adjacent to the core layer wherein the bottom surface layer has a plurality of wood-based strands wherein the plurality of wood-based strands has a second strand angle defined by an average deviation from a longitudinal axis of the bottom surface layer wherein the second strand angle is approximately positive/negative 15 degrees to 30 degrees, and wherein the bottom surface aver has a bottom surface strand density that is less than the core layer strand density; and a first cover layer on the top surface layer wherein the first cover layer has a plurality of wood-based strands wherein the plurality of wood-based strands has a third strand angle defined by an average deviation from a longitudinal axis of the first cover layer wherein the third strand angle is less than the first strand angle and the second strand angle.