WTC Construction Update, August 2012Aug 14, 2012
4 World Trade Center
Structural steel is now topped out at the 72nd floor, with only roof bulkhead and upper mechanical construction left. The curtain wall installation, which began in late April 2011, has reached the 58th floor. Both the below-grade mechanical work and the fireproofing and masonry work are advancing. In addition, the utility work along Liberty Street and Greenwich Street (inside the work site fence) has been active since late July and will continue through August of this year. Two cranes are now active on the site and elevator shaft work is underway.
3 World Trade Center
Erecting forms, rebar and concrete placement for decks and walls is proceeding, as is the at grade utilities installation. Two tower cranes are now active. The at-grade steel superstructure work has been active since April 2011 and the tower’s lower podium will reach its full seven-story height in September, 2012.
2 World Trade Center
Current work at 2 World Trade Center includes completing the street level superstructure steel and concrete. Installation of the building mechanical systems continues throughout the B1-B4 basement levels. The building is expected to be completed to street level in the fall of 2012.
1 World Trade Center
Under the Port Authority’s supervision, tower steel has topped out at the 105th floor with the installation of glass curtain wall above the 82nd floor and concrete floors poured above the 93rd floor. The elevator shaft fit-outs and spray-on fireproofing are both underway as are the utility installation and tie-ins. The “cocoon” safety system is now in place around the upper perimeter and will continue to rise with the building. The installation of the 408-foot-tall telecommunications spire is expected by end of summer 2012.
World Trade Center Transportation Hub
Steel erection for the Transportation Hub oculus substructure has begun as well as construction on the connection to the Vehicular Security Center. Steel and concrete has also been placed underneath the 1 subway line along the Greenwich Street corridor. Preparations are being made installation of the east arch truss. The Transportation Hub construction contract was awarded to Skanska in summer 2010. Construction of the West Street pedestrian underpass (the “east-west connector”) , linking the World Trade Center with Battery Park City’s World Financial Center, is now active on the west side of the WTC site ( just south of 1 WTC and across West Street). The east-west connector structural components are being installed across West Street.
National September 11 Memorial and Museum at the World Trade Center
The National September 11 Museum is in the midst of interior fit-out and artifact installation in the underground space with the opening date TBA. With more than 225 trees now on site, more soil installation and tree planting is underway and will continue in phases through 2013. Utilities, waterproofing, and other activities are progressing with both structural steel and façade installation are complete at the above-ground Memorial Pavilion; The interior fit-out is now underway. The Memorial reflecting pools and waterfalls were commissioned in late August 2011 with the bronze nameplate installation completed in June 2011. The “Survivors Stairway” was relocated to its permanent home in the underground Memorial in December 2008 and the Slurry wall reinforcement was completed in spring 2009. 75% of the Memorial Plaza opened on September 11, 2011 and has hosted over 4 million visitors to date.
World Trade Center South Bathtub / Vehicular Security Center
South Bathtub “Phase 1” is the site bounded by Liberty, West, Cedar, and Washington. Work there includes steel and concrete installation and welding. A tower crane is mobilized inside the site at West and Liberty Street. South Bathtub “Phase 2” is the site bounded by Liberty, Washington, Albany, and Greenwich (the former 130 Liberty site). Work there includes concrete placement and steel erection. Port Authority crews are now working daily double shifts at the South Bathtub, with occasional extended hours to 1 a.m. The 130 Liberty Street site turnover to the Port Authority took place in late February 2011 and preliminary design research is currently underway for the future Liberty Street Park. The reconfigured Liberty Street Bridge opened April 21, 2010 followed by the removal of the historic ship discovered on site took place in July 2010.