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Hard core concrete

New concrete construction technique used on 3 World Trade Center

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Six years after construction began on 3 World Trade Centre, located in Manhattan, New York City, the world’s most anticipated building is finally nearing completion. Designed by award-winning British architects, Rogers Stirk Harbour + Partners, 3 World Trade Center is set to open in 2018 and will have 80 floors, plus 500 000 square feet of retail space.

3 World Trade Center

3 World Trade Center’s unusual construction technique, in which the building’s concrete core has been completed first, has not been used on other office towers in the city before. But engineers have seen buildings being constructed this way in cities such as London, Shanghai, Seoul, Dubai, Beijing and Kuala Lumpur.

Concrete is more cost-effective than steel frame cores, but that is not the reason developers and engineers have chosen to construct the building in this way. After the terror attacks of September 2011, where hijacked planes easily pierced through the steel frames of the previous towers, they decided to relook at building composites.

In this new design, the concrete core will act as a safety system, helping to stabilise the high-rise building against lateral forces such as wind. The walls are 90 centimetres thick on average. The emergency stairways, elevator shafts and vertical channels - through which electrical, communication and plumbing lines run - are kept sheltered from any impact.

3 World Trade Center

The building will feature floor to ceiling glass and an open-plan workspace, which will help to attract creative- and technology-driven companies, as well as law and financial service firms to the building. GroupM, the world’s leading media investment management group, will occupy around 700 000 square feet of the building.

In June 2016 over 1 000 union construction workers and leading New York government, civic and business officials celebrated the pending completion of the property at a topping out ceremony.

“I couldn’t be more proud of the 2 300 union construction workers who have already put in over 5 million hours to build this tower from bedrock to 1 079 feet,” said Gary LaBarbera President, Building and Construction Trades Council of Greater New York. “It now stands as part of the skyline of New York as a testament to New York’s resolve to never give up, always move forward, and build New York bigger, better and stronger.”

3 World Trade Center is located diagonally across from 1 World Trade Center and at 1 079 feet, the 2.5 million square foot tower will be the third tallest skyscraper on the World Trade Center site and the fifth tallest in New York City.

3 World Trade Center

Source: New York Times and World Trade Center

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