Формула 7

\begin{array}{l} ε = \sqrt{235 / f_{y}} = \sqrt{235 / 355} = 0, 814 \\ λ_{1} = 33 \cdot ε = 33 \cdot 0, 814 = 26, 8 < \frac{c_{2}}{t_{w}} = 165, 8 \\ λ_{2} = 38 \cdot ε = 38 \cdot 0, 814 = 30, 9 < \frac{c_{2}}{t_{w}} = 165, 8 \\ λ_{3} = 42 \cdot ε = 42 \cdot 0, 814 = 34, 2 < \frac{c_{2}}{t_{w}} = 165, 8 \end{array}

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