What can you show me about his original statement?
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Here's my problem with the quote, as it is portrayed.
If I'm taking that measurement, and I the building has fires & unknown amounts of internal damage (but significant damage visible from the outside), and I know that all tall buildings are unique designs ...
... and I see from the transit measurements that the building is unstable ...
... and my best guess is 5 to 6 hours from now ...
... then there is absolutely no way that I'm going to tell anybody "I think that it'll collapse 5 to 6 hours from now."
Because some management dufus might report to somebody, "tfk said it's going to collapse between 5 & 6 hours from now." And based on that, some other dufus might decide, "well, let's fight the fire for another 3 hours. That'll give us a 2 hour margin to pull everyone out before it collapses."
I'm instead going to be REALLY clear, and say, "It might collapse any minute. It's unstable. But, if forced to make a guess, I'd guess 'sometime between 5 & 6 hours from now'."
I can easily see how the first part of the statement might be dropped in the re-telling of the story.
Now, perhaps I'm wrong about this.
Perhaps this guy has some tilt angle that his experience tells him is the critical angle. Perhaps this angle is the same for differing building heights (although I seriously doubt this). Perhaps he's got some chart of "critical angle vs. building height", although I kinda doubt this too.
Perhaps he was able to do some calculation of tilt rate, current angle & "time to reaching critical angle". But I doubt that, also.
Maybe he was going just by his gut.
But I believe it to be incredibly dangerous for him & for others to have said, "I think that it'll collapse between 5 & 6 pm."
Even if that is exactly what I thought would happen.
And I'm a guy who loves to take chances.
That's not one I'd take.