Vzorec 4

D_{44}^{''} = \max (D_{44, calc}^{''}, \frac{48}{5 l^{2}} \frac{1}{\frac{1}{\sum_{i = 1}^{n} E_{x, i}^{''} \frac{t_{i}^{3}}{12}} - \frac{1}{\sum_{i = 1}^{n} E_{x, i}^{''} \frac{z_{\max, i}^{3} - z_{\min, i}^{3}}{3}}})

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