What Really Happened at the Millennium Tower?
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.
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.
Recommended by 2 HN commenters across 2 different months, 2022 to 2023.
What Hacker News said
Recommends dodgerdan · 2022-07 · on “Myths about construction”
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. [this video]
Recommends mc32 · 2023-01 · on “CA Cities to Lose All Zoning Powers in 2 Days”
Here is someone who goes into detail about the Millennium Tower debacle: [this 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.
Cites neom · 2022-01 · on “San Francisco Millennium Tower tilting 3 inches per year”
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? - [this video] SF Millennium Tower Tilts Quarter Inch in Four Days - [LINK] Despite Warnings, Repairs on San Francisco’s Millennium Tower Caused Additional Sinking - [LINK]