Strand orientation is a major factor affecting composite properties. It is
measured for OSB as the angle between strand grain direction and the panel axis. The
angle is used to describe orientation within a board. Values of MOR and MOE in the
parallel board direction increase with higher levels of orientation. The Hankinson’s
equation that shown in Eq. (1) is an empirical formula used to transform parallel and
transverse stiffness properties to some arbitrary angle. This equation was used with an
off-axis orientation [8,9].