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Thanks for the link. Sorry to say this, but it's also a lesson about what can happen when governments relax building regulations* in response to a housing crisis -- even a legitimate crisis. There are only 2 ... * or assume that what's engineered and on the plans is what actually gets built.

Only 2 even mildly surprising things about this piece (produced w/o seeing the plans or doing any quantitative analysis): 1. The age of the buildings: We kinda expect this in certain pre-1980 (depends on location) buildings, but not from 2011. 2. ...

2. Basically correct for what it says -- not enough wall, hints of shoddy construction, obvious directionality -- but totally whiffing on the obvious key deficiency: a soft & weak first story. Masonry infill itself was not a problem as much as the LACK of infill in the ground story. ...

The broken beam-column joints they key on are irrelevant if the whole structure has already failed at the ground story. The fact that the piece doesn't mention this suggests a bonus mild surprise #3: 3. Why didn't they talk to any CA engineers? Possibly they tried, but CA engrs were busy ...

It's an interesting question, to what extent this was a failure of regulation. On some level, obviously yes (plans were probably not followed, enforcement was lacking); in other ways, no (it was a government project – how much more government regulation can you get than gov't being the owner?).

Yes, hence my asterisk. But cheating/corruption & weak regulation go hand in hand and reinforce each other. But I agree: if I could have strong regulation or 0% corruption, I would go for 0% corruption without hesitating.

Yup. The article mentions that the VZ building code required a certain technique for the steel ties that was not followed. It’s not the “regulations,” it’s the inspections. corruption, not deregulation. (The “not X but Y”) framing is my own lack of creativity and not AI.)

And yet, I assure you these buildings did NOT collapse as they did because they only had 90-deg hooks. The identical adjacent bldgs had the same detailing but nothing like the same damage. Irregularity should also be in their code, so that's "regulation" too, but it's really more basic EQ design.

Perhaps a case of regulation not being "sized" correctly for the economic decline of the country? It seems like they were expected to be applying some fairly advanced methods that economically/politically they were in no state to actually do correctly, and some basic prescriptive rules that...

...were clearly understood as "critical" would've been better – as opposed to what actually seemed to have happened, was that a formerly wealthy country had rules that would've worked out fine in the US/Japan/Chile, and pursued complex things like moment frames and...