Quote:
Originally Posted by AsianDivaGirlsWebDude
And what about WTC 7? |
Quote:
|
The direct effects of earthquakes can damage buildings in several ways. They can cause the ground underneath to fail, thereby undermining foundations. This is particularly likely on unstable land, such as in areas that have been reclaimed from the sea. The huge Minato Mirai development in Yokohama, Japan, for example, is built on land reclaimed from Yokohama Bay. To help counter this, the foundations of the buildings built there go through the landfill and are anchored firmly to the basement rock beneath.
|
If I'm not mistaken - all that land the buildings were built on was landfill... ok, the WTC foundations went down to bedrock 70 feet below ground level, but given that building 7 was the last to be completed 17 years later, methinks they
may have been a little lax in their foundation structure...
http://web.mit.edu/civenv/wtc/PDFfil...%20History.pdf