For symmetrical shapes, this will be geometric center. See Moment of Ineria of a circle to learn more. This is because sections aren’t designed to take as much force about this axis
The higher this number, the stronger the section. Moment of Inertia (Iz, Iy) – also known as second moment of area, is a calculation used to determine the strength of a member and it’s resistance against deflection.Area of Section (A) – Section area is a fairly simple calculation, but directly used in axial stress calculations (the more cross section area, the more axial strength).
Here is a concise list of the section property terms and definitions: The moment of inertia calculator will accurately calculate a number of important section properties used in structural engineering.