"Up/down" series speeds c...
"Up/down" series speeds construction of tallest solidified building An "up/down" classification that allows construction to proce simultaneously one as well as the other up and down from the domain floor is reducing by four month the construction time of a Chicago office tower that at 959 feet will be the world's tallest become firm [i]or[/i] solid building when completed in early 1990 The operation allowed construction of the tower to take place at the same time that the building's three below-grade parking plains were being completed. The construction of 311 s Wacker Drive began in May 1987
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