Moment of Inertia of Beam is a measure of the beam’s resistance to bending under various load conditions, depending on its length and type. And is denoted by I. Moment of Inertia of Beam is usually measured using the Meter⁴ per Meter for Moment of Inertia per Unit Length. Note that the value of Moment of Inertia of Beam is always positive. Typically, the value of Moment of Inertia of Beam is greater than 0.