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What Really Happened at the Millennium Tower?

Practical Engineering · explainer · Watch on YouTube

Civil engineering & constructionGeology & earth science

What it is

Practical Engineering explains why San Francisco's Millennium Tower is sinking and tilting, covering how geology and foundation design (friction piles in the Colma Formation) affect skyscrapers. It also covers the fix being attempted.

Why Hacker News recommends it

HN commenters point to it as the well-made, detailed explanation of the Millennium Tower debacle whenever the tower comes up.

  • 2 people recommended it
  • 2 different months
  • 0 strong recommendations
  • first 2022, last 2023

What HN commenters said

  1. “Grady also has an excellently made video about the leaning Millennium Tower in SF”

    Well-made video on the leaning Millennium Tower.

    dodgerdan, 2022-07 · Recommendation · in “Myths about construction”

  2. “Here is someone who goes into detail about the Millennium Tower debacle”

    Detailed explanation of the Millennium Tower debacle.

    mc32, 2023-01 · Recommendation · in “CA Cities to Lose All Zoning Powers in 2 Days”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: millennium tower, foundations, geotechnical engineering, skyscrapers, san francisco

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