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How Deep Do Building Foundations Actually Go?
What actually supports a building? Most people think of foundations as just concrete slabs, but the engineering reality is far more complex. This episode unpacks the difference between shallow and deep foundations, why a basement isn't a foundation, and how skyscrapers like the Burj Khalifa and Shanghai Tower use piles driven fifty to eighty-six meters deep to avoid differential settlement. We also explore frost heave, mass concrete thermal cracking, and the cautionary tale of the Leaning Tower of Pisa — a three-meter foundation failure that became a world heritage site. Whether you're…
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