Abstract: An oriented strand board panel and a method for making the same are provided. The OSB panel has at least three layers, namely, a top surface layer, a core layer, and a bottom surface layer. A first cover layer may be provided on the top surface layer. Likewise, a second cover layer may be provided underneath the bottom surface layer. The first cover layer and/or the second cover layer may have a smaller strand angle, defined by an average deviation of strands from a longitudinal axis, than the top surface layer and the bottom surface layer. The smaller strand angles for the first cover layer and/or the second cover layer provide the OSB panel with greater stiffness and strength along the strong direction of the panel without significant compromise of strength and/or stiffness in the weak direction of the panel.

Abstract: Methods are provided for detecting compression wood, blue stain, or pitch in lumber. A light beam is projected towards the wood sample. Line or area cameras acquire images of light that is reflected from the wood sample. Based on the intensity of the reflected light at one or more locations on the wood sample, compression wood, blue stain, or pitch may be detected.