Silverstein is building 3 WTC concrete-first Iron workers union formerly resisted unusual “composite” design
At 3 World Trade Center, Silverstein Properties is employing an uncommon construction method once shunned by union work爱上海同城对对碰 ers.
The developer is building the 80-story office tower using a “composite” structural design: a concrete core and a steel perimeter.
The technique was long resisted 爱上海同城手机版 by Local 40 of the International Association of Bridge, Structural, Ornamental and Reinforcing Iron Workers, who balked at the idea of working belo爱上海同城 w a concrete pouring team.
The novel approach means the building’s topping out will be marked with a bucket of concrete signed by workers, rather than the traditional topmost steel beam, the New York Times reported.
But the terrorist attacks of Sept. 11, 2001 demonstrated the vulnerability of skyscrapers built with steel-framed cores.
The core of 2.8 million-square-foot Rogers Stick Harbour Partners-designed tower is three feet thick on average, and reinforced with steel bars.
The buil上海千花网龙凤论坛 ding is set to open in 2018. Advertising firm GroupM has agreed to lease about 690,000 square feet there. [NYT] – Ariel Stulberg
Tags: 3 World Trade Center
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