### Design and Calculations [iSheetPile] - Think .

Design and Calculations. Better Understanding Section Modulus, Design Moment and Moment of Inertia . Both the Moment of Inertia and the section modulus are measurements of the relative stiffness of a cross section of steel piling. Generally speaking, I (Moment of Inertia) is a geometrical value, used for stiffness determination and is therefore important to determine deflections in the ...