Question

The longer side of cross-section of grider used as depth

Answer 1

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Answer 2

hey mate here is your answer

Section modulus is a geometric property for a given cross-section used in the design of beams or flexural members. ... The elastic section modulus is defined as S = I / y, where I is the second moment of area (or moment of inertia) and y is the distance from the neutral axis to any given fiber.