BUILDING SYSTEM FOR SKYSCRAPERS

A building system for skyscrapers includes a plurality of first building stories, a second building story located above the first building stories, and a plurality of third building stories located above the second building story. The second building story has a plurality of horizontal steel beams, a plurality of first vertical steel columns and a plurality of second vertical steel columns. The first vertical steel columns are located at a remote end of a lateral side of the building system, while the second vertical steel columns are located at a near end thereof. The fire resistance of the first vertical steel columns is superior to that of the second vertical steel column. Thus, while the building system is in a fire, the second vertical steel column would be affected more by the fire to reduce the vertical support thereupon than the first vertical steel column does.