Failure Mechanism 2

η = \frac{τ_{x, net}}{f_{v, net}} = \frac{\frac{n_{x y} e_{x}}{b_{x} \sum_{i, y} t_{i}}}{f_{v, net}} \leq 1

η = \frac{τ_{y, net}}{f_{v, net}} = \frac{\frac{n_{x y} e_{y}}{b_{y} \sum_{i, x} t_{i}}}{f_{v, net}} \leq 1

L	Span length between support and support spring
L	Span length between support and support spring
b_x, b_y	Plank width in the x or y direction

Do you have any questions?