Section Modulus calculation and optimization

Section modulus=Moment of Inertia/distance between the neutral axis

SM=I/Y ; Y=L/2

case 1;

SM=I/Y

=2.95*10^5/440.075

=670.340

Section Modulus=670.340

case 2;

SM=I/Y

=3.346*10^5/440.07

=760.333

Section Modulus=760.333