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Elastic Section Modulus of a Trapezoid

 

Elastic Section Modulus of a Trapezoid formulas

\(  S_x \;=\; \dfrac{ I_x }{ C_y  }   \) 

\(  S_y \;=\; \dfrac{ I_y }{ C_x  }   \) 
Symbol English Metric
\( S \) = elastic section modulus \( in^3 \) \( mm^3 \)
\( C \) = distance from centroid \( in \) \( mm \)
\( I \) = moment of inertia \(lbm \;/\; ft^2-sec\)  \(kg \;/\;m^2\) 

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