The Construction of One World Trade Center

Imagine working on a project with the eyes of an entire nation on you. At the construction of One World Trade Center, the worker’s camaraderie and pride in their job is an example that should be followed among tradespeople everywhere.

After watching this video, we go to thinking: What does it take to build such a complex project? We took a look at some of the numbers associated with the redevelopment of this historic site. Tune in to the construction sites’s live webcams to see them in action.

  • Foundation was poured in November 2006 and the building is scheduled to be completed April  2013, totaling nearly 6 1/2 years of construction time.
  • The foundation of One World Trade Center is made up of 400 cubic yards of poured concrete, carried in by as many as 40 trucks. The tower’s concrete core uses nearly 520 cubic yards of concrete, and just over1,200 cubic yards of concrete were poured to form the street-level plaza.
  • By the tower’s completion, more than 200,000 cubic yards of concrete will have been poured (that’s more than three Empire State Buildings worth!). The strength of the concrete varies between 4,000 psi and 14,000 psi.
  • An estimated 50,000 short tons of steel are necessary for this project.
  • The largest column installed at the building is a steel beam weighing in at 70 short tons.
  • The public was invited to sign the 30-foot steel beam that later became the first beam to be welded onto the building’s base.

    (via New York Times)
  • Builders are working at a rate of one floor per week.
  • The total manpower of all of the trades involved is approximately 1,100 people.
  • The Port Authority coordinated 19 public agencies, 101 different construction contractors and subcontractors and 33 different designers, architects and consulting firms for this project.
  • The waterfalls in Memorial plaza pour 40,000 gallons of water per minute, which could fill an Olympic-sized pool in eight minutes
  • Memorial plaza will use bout 18,000 cubic yards of dirt – enough to fill five Olympic swimming pools. Approximately 128,000 square feet of stone, or two football fields’ worth, will be used for the plaza and paths.
  • Estimates put the cost of construction for  the completed building at $3 billion, or $1,150 per square foot.
View from the building’s 90th floor


Construction of 1 WTC, December 2011

What’s the biggest construction project you’ve ever worked on?

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