Modulus of Elasticity (MOE)
Modulus of elasticity is a measure of stiffness. This factor (MOE) is a relationship between the amount of deflection in the member and the value of load applied that causes the deflection. The
amount of deflection depends on the size of the member, the span between the supports, the load, and the particular member specie of wood. The parallel-to-grain MOE (i. e., the stiffness when wood is pushed or pulled parallel to the wood grain) is about 30 times greater than the perpendicular-to-grain MOE.