圣者
精华
|
战斗力 鹅
|
回帖 0
注册时间 2017-11-21
|
https://fullfact.org/online/world-trade-center-7-9-11/
A post on Instagram has claimed that on 9/11, World Trade Center 7 collapsed “for no apparent reason”.
During the terror attacks of 11 September 2001, four planes were hijacked: two were flown into the Twin Towers, one into the Pentagon and another crashed in a field in Pennsylvania. Two planes were flown into the North and South towers, part of the World Trade Center complex of seven buildings. Both towers collapsed shortly afterwards. World Trade Center 7 was a 47-storey building in the complex, which was not directly hit by an aircraft, and also collapsed later that day.
There are a number of reasons this building collapsed on the day, despite not being hit by planes, which have been described by investigators, scientists and experts since.
According to the US government’s National Institute of Standards and Technology (NIST), which investigated the reasons behind the collapse for years, a number of fires are behind World Trade Center 7’s collapse.
NIST says that debris from the collapse of the North Tower ignited fires on at least 10 floors of World Trade Center 7, some of which burned out of control because the automatic sprinkler system for some floors had failed (partly due to city water lines damaged by the collapse of the Twin Towers).
Heat from the fires then caused steel support beams to expand which led to several floors collapsing. This then triggered a number of other structural failures, which eventually resulted in the whole building collapsing.
The theory that an explosion caused the building’s collapse was investigated, but no evidence of this was found.
It’s true that fire causing tall buildings to collapse is rare. NIST lead investigator Shyam Sunder told journalists at the time: “This is the first time that we are aware of, that a building taller than about 15 stories has collapsed primarily due to fires”.
We’ve written previously about other conspiracy theories relating to World Trade Center 7.
不知道楼主这个地基问题是哪里看的，随便找了一篇报道，根据美国国家标准与技术研究院的意见，7号楼倒塌的主要原因就是由于双子塔北塔引燃了7号楼至少10层，导致钢结构受热失效，还夹杂着自动喷水装置失效的问题（部分原因是水管线因为双子塔的事故被切断了）
亦有说法是爆炸导致7号楼倒塌，但是没有可靠证据，这里就不管了 |
评分
-
查看全部评分
|
沪公网安备 31010702007642号 )
发表于 2024-7-12 21:18
福特这个按说法是77和78之间计划是应该还有一艘试验过度舰，结果给砍了，新装备直接上了78，结果所有的问题在福特身上集中爆发
7号楼47层都有百来米了，也是钢结构，还这么近，倒了一点都不奇怪
