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U section

U section h b s Y Y M X x M e y s x b/ 2 t r 2 r 1 5% else 8% if h ≤ 300
U section
html 
<img src="https://eng-calculations.com/SVG/EN/EN_10365/U section.svg" alt="U_section" title="U_section">
url 
https://eng-calculations.com/SVG/EN/EN_10365/U section.svg