[stephengoodwin]

> This was a major concern at the time, but wasn't publicized.

Side question: Is there a good place to learn about major structural engineering fixes that were kept secret until the work was completed?

[jonlucc]

I don't have a comprehensive resource, but the other one that comes to mind is covered in an episode of the "99% Invisible" podcast titled "Episode 110: Structural Integrity".

http://99percentinvisible.org/episode/structural-integrity/

[js2]

Another one is the Citicorp tower in NYC:

http://www.slate.com/blogs/the_eye/2014/04/17/the_citicorp_t...

An updated link to the New Yorker piece mentioned in the article is http://people.duke.edu/~hpgavin/cee421/citicorp1.htm

Or if you have a New Yorker subscription http://www.newyorker.com/magazine/1995/05/29/the-fifty-nine-...

I'd actually read the New Yorker article first, then read the more recent reporting.

edit: this is the same story mentioned by jonlucc in sibling comment.