No steel frame building has ever collapsed from fire alone, so if WTC7 did, then the investigation should involve structural engineers from all over the world to investigate such a phenomenon.
No steel frame building has ever collapsed from fire alone, so if WTC7 did, then the investigation should involve structural engineers from all over the world to investigate such a phenomenon.
Never bought the WTC7 story. A fire big enough to collapse a skyscraper would have been massive. Go look at videos of hi-rise fires and notice how massively the fires rage, and that's on buildings that don't even burn enough to collapse.