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→5.4.2 Stress Force Limitations
For all calculations according to the formulas in <xr id="tab:tab5.24"/> Table 5.24 one should check if the thermally or mechanically induced stress forces stay below the allowed bending force limit. The following formulas are applicable for calculating the allowable load (Force P<sub>max</sub> or momentum M<sub>max</sub>):
<table class="twocolortable" style="text-align: left; font-size:12px;width:60%">
<tr>
<td>Single side fixed strip</td>
<td><math>P_{max} <
\frac {\sigma Bs^2}{6L} </math> </td>
</tr><tr>
<td>Both sides fixed strip</td>
<td><math>P_{max} <
\frac {\sigma Bs^2}{1,5L} </math></td>
</tr><tr>
<td>Spiral or filament </td>
<td><math>M_{max} <
\frac {\sigma Bs^2}{6} </math></td>
</tr><tr>
<td>Disc </td>
<td><math>P_{max} <
\frac {2 \sigma s^2}{3} </math></td>
</tr>
</table>
<math>\sigma</math> = bending stress
