Picture the scene: you're given a nice chunk of land to develop and make billions, but there's a catch. There's already somebody situated on the plot of land who won't budge - you need to share.
This was the problem faced by structural engineer William LeMessurier in 1976 for the construction of Citigroup Centre at 601 Lexington Avenue in New York City.
His seemingly simple design solution created a chain of design implications, which cumulated in SERENE - the code name for the secret emergency works required for this skyscraper which was found after construction was complete to have a 1 in 16 chance of collapse in any given year...
Happy New Year!!

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