Innovative beam system supports subway tunnel

10/5/2009 | TribecaTrib.com (New York City)

Port Authority crews have completed a temporary support structure comprised of steel I-beams that secures a subway tunnel at the World Trade Center site. The support system allows trains to continue to run through the tunnel, which is suspended above ground, while construction continues on the site.

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TribecaTrib.com (New York City)

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