Cloud walkers Most people in the construction business call buildings that are over 30 stories skyscrapers. Traditional reinforced concrete has no way to support structures of such enormous size. In order to strengthen such buildings 'ability to withstand earthquakes and to maintain the construction schedule, builders have begun using steel frames.
一般業者將三十層以上的高樓建築稱為超高大樓，傳統的鋼筋水泥無法負重其龐大的結構，為加強耐震度及維持施工進度，於是必須以鋼骨作為結構體。