[QUOTE="Wasdie"][QUOTE="DanC1989"] Of course..but by what? :P I wouldn't really have an qualms with the WTC collapses if it weren't for this one, not many buildings collapse from fire damage. And then if this one was pre-planned then obviously it brings the rest very much into question as they were the catalyst for its collapse. Look up Barry Jennings.67gt500
By what? When 2 massive buildings collapses the vibrations will rock any building around it very heavily. Why do buildings fall during earthquakes or after? Their structures get weakened by the force of the vibrations. You add tons of debris hitting the the building, the thing was going to fall. In NYC buildings aren't built to withstand earthquakes. I guarantee if it happened in LA, other buildings around the site wouldn't have been nearly as effected as they are built to withstand earthquakes.
When they do controlled demolitions in any major city, they always take great care on how the building falls so that the vibrations created by the collapse do not weaken the older structures around it.
Remember with the WTC were hit by planes they didn't just bounce off... the whole buildings were shook to their core. NYC buildings do not have to be up to earthquake standards. You crash a massive plane into a tall building, it's going to weaken the whole thing. The parts that were the weakest were where the planes physically hit. Since they hit on the top, but didn't topple the buildings right away (if they would have hit a stone structure like the Empire State Building or the Chrysler Tower, things would have been far different), they would fall straight down into themselves because the bottom of the buildings were still the most structurally intact.
Just thinking with some basic physics and logic is enough to know that there were no explosives needed to bring those buildings down.
Even after severe quakes, many structures take massive damage without being completely razed...But in earthquake zones they are built to withstand earthquakes.
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