Shear Area in z-Direction

A_{z} = \frac{{I_{y}}^{2}}{\int_{A *} {(\frac{S_{y}}{t *})}^{2} d A *}

I_y	Second moment of area related to the axis y
S_y	First moment of area related to the y-axis with regard to the section outline
t*	Effective element thickness for the shear transfer calculated at each x-location of the element, taking into account the section outline

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