The press is misreporting the structural issue found in an inspection. That issue was about waterproofing the deck holding the pool, all of which sat atop a garage. The pool and garage are intact and not involved in the collapse. The kind of defects that caused the collapse were hidden and not observable by usual means.
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In the future, all buildings will be instrumented during construction so they can alert authorities to a problem. There's actually a technology that uses the cement as a battery to power the sensors. But that's way off in the future. Right now we're still in the stone ages because no one wants to pay for anything.