Shear Strengths

f_{v, k} = \{\begin{cases} 3.5 \\ 8.0 \frac{D_{net}}{D} \\ 2.5 (\frac{(n - 1) (a^{2} + b^{2})}{6 \cdot D \cdot b}) \end{cases}

D	Element Thickness
D_net	Sum of the longitudinal and transverse layer thicknesses in the element
n	Number of board layers
a=b	Width of the boards in the longitudinal or transverse layers

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