Sub strength steel reo bars in the concrete rusting and failing to add strength to the over all structure because the concrete mix was too wet and didn't actually contain enough cement to bind it all together? Who knows, hopefully there will be a genuine enquiry into the issue and followed up by investigations into other projects that use similar materials that were certified by the same engineers.
Remember the Wollongong showground grandstand roof getting nearly torn off in the wind a few yrs back? Same problem, someone cutting corners and using below spec materials.
The rate building fall over in China, one must be suspect about the building materials and practices used there, why would they expect something different to happen when used over here?
That's what I fear will be the outcome.