HEB section
<img src="https://eng-calculations.com/SVG/EN/EN_10365/HEB section.svg" alt="HEB_section" title="HEB_section">
https://eng-calculations.com/SVG/EN/EN_10365/HEB section.svg
<img src="https://eng-calculations.com/SVG/EN/EN_10365/HEB section.svg" alt="HEB_section" title="HEB_section">
https://eng-calculations.com/SVG/EN/EN_10365/HEB section.svg