What Really Happened at the Millennium Tower?
Practical Engineering2 HN recommenders · 2022–2023
4M views · explainer · dated · Uploaded 2021-11-16
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.
HN commenters point to it as the well-made, detailed explanation of the Millennium Tower debacle whenever the tower comes up.
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3 comments from Hacker News
It's been interesting watching this unfold, some good videos around it: Most recent report from engineer mentioned in article to oversight committee: [LINK] (Item 8, around 2 hours in) New Project Aims To Reinforce, Level Out Millennium Tower - [LINK] What Really Happened at the Millennium Tower? - [VIDEO] SF Millennium Tower Tilts Quarter Inch in Four Days - [LINK] Despite Warnings, Repairs on San Francisco’s Millennium Tower Caused Additional Sinking - [LINK]
Grady also has an excellently made video about the leaning Millennium Tower in SF and what they’re doing while still trying to fix it. [VIDEO]
Here is someone who goes into detail about the Millennium Tower debacle: [VIDEO] In short, shortcuts, or more charitably, miscalculations. They really thought they had enough margin to work with but obviously that wasn’t the case.