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Client:
Silverstein Properties
Construction period:
2008 - 2015 (planned)
General contractor:
Halmar International, Turner Constructions, Tishman Constructions
On the site of the Twin Towers of the World Trade Center, destroyed on September 11, 2001, a memorial and four new towers (1 WTC to 4 WTC) have been constructed. The master plan for the reconstruction was created by Daniel Libeskind. Upon completion, 1 WTC (formerly Freedom Tower) will be the tallest building in New York, standing at over 540 m.
SAS steel was used in both the foundation (as DCP anchors and caisson piles) and the load-bearing structure (columns and shear walls) of the buildings. Conventional reinforcement was replaced with SAS 670 to optimize costs. For pure reinforced concrete columns, prefabricated reinforcement cages were employed. The high-strength steel used in composite columns was installed rod by rod. The simple, quick, and thus cost-effective installation of threaded steel convinced both the installation and construction companies, as well as the client.
6,200 tons of SAS 670/800 high-strength reinforcement, Ø 43 mm to 75 mm with plates, nuts, and couplers,
450 tons of SAS 835/1035 tension rods, Ø 75 mm as DCP rock anchors with anchor head and coupler connection.
