修造WTC
WTC被修造是堅不可摧,承受巨大的風速、多火和均勻噴氣機崩潰。 WTC雙塔是珠寶在冠并且是110個地板、500,000噸、鋼200,000口氣和300,000噸鋼筋混凝土。 一切關於塔是巨型的,塔用3次工作負擔修造了在頭腦裡。 一個方形的鋼外面圓筒以「堅不可摧的」鋼核心是它的建築。 All other tall buildings followed and improved upon the WTC design style, it was the strongest, tallest structure of its day, a significant achievement using only the most high quality steel.
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