This is all true, and I admit using to big a brush here. And sorry for my inaccuracies.
I meant to look as the process more holistically. Yes, I think you're precise in point out this was not a planning / engineering issue, but execution. But stepping away from the finger pointing; there is always a disconnect between the actual physical building and the model, assumptions conjured to guide the physical process toward safety. A welded joints on paper are neither safe or unsafe; it's the physical result that requires the safety.
It seems that somewhere in the process the architect/designer, engineer, supervisor, builder, hadn't paid attention. And without blaming one or the other, there are always (political) motivations for people to look away. That is, it's difficult to get a man to appreciate a problem when his salary depends on his not understanding it. :-)
I meant to look as the process more holistically. Yes, I think you're precise in point out this was not a planning / engineering issue, but execution. But stepping away from the finger pointing; there is always a disconnect between the actual physical building and the model, assumptions conjured to guide the physical process toward safety. A welded joints on paper are neither safe or unsafe; it's the physical result that requires the safety.
It seems that somewhere in the process the architect/designer, engineer, supervisor, builder, hadn't paid attention. And without blaming one or the other, there are always (political) motivations for people to look away. That is, it's difficult to get a man to appreciate a problem when his salary depends on his not understanding it. :-)