1:24 Slender Skyscraper - 111 West 57th Street 8

[kissymoose]

This isn't a very technical question, but more coming from strong curiosity and amazement at what we're building nowadays.
There's this new residential skyscraper going up in New York City with a slenderness ratio of 1:24. It's more than 1400ft tall.

I don't know much about or have any experience of this "pinnacle of engineering" type of work. How in the world is this possible? They mention two of the four walls are shear walls, I guess without any openings, and there's a tuned mass damper on top. Is the majority of the lateral load countered by the tuned mass damper or the shear walls?
Kind of a short question, but I also wanted to see others' opinions on the building.

 

[MIStructE_IRE]

$130m?! I’m guessing the buyer wasn’t a structural engineer...

 

[IceNine]

That's chump change, try $240 Million

https://www.nytimes.com/2019/02/01/...thouse-sets-record-at-nearly-240-million.html

 

[kissymoose]

They're not geniuses; they're just regular engineers...it looks like they're using outriggers on those gigantic columns

if you can’t explain a fancy computer model using a couple of quick calcs and some free body diagrams - then either there’s something wrong or the engineer hasn’t a clue what they’re doing!

Well at the end of this thread, the structural stability of this stick seems a lot less daunting, so I'm thankful for the insight and discussion. It's an interesting feeling of switching tasks between making sure the building can stand up and not freaking people out with their bathwater sloshing around during a wind storm. It's a little relieving to have to design something beyond stability, but structural engineering would be a lot more interesting and technical if serviceability wasn't a thing.

they do have the best spreadsheets in the business.

I'm a sucker for a good spreadsheet. But developing automation in design can be such a time suck and just doesn't make sense for variety in project types. Just trying to figure out different aspects of Revit isn't worth the time, and someone else already made it.