WTC Construction Update, June 2012Jun 26, 2011
4 World Trade Center
Structural steel is now above the 72nd floor, with concrete being poured above the 67th floor. The curtain wall installation, which began in late April 2011, has reached the 66th floor. Both the above and below-grade mechanical work is advancing. Installation of the stone finishes on the walls of the commercial lobby and elevator banks is nearing completion. In addition, the fireproofing and masonry is underway along with the building’s elevator shafts and cab installations. Two cranes are now active on the site. A top out celebration was held on Monday, June 25.
3 World Trade Center
The installation of the massive above grade structural steel columns and beams has begun on the southern side of 3 WTC. Erecting forms, rebar and concrete placement for decks and walls is proceeding, as is the below grade utilities installation. The sub-grade steel superstructure work has been active since April 2011 and now the tower’s lower podium will reach seven stories in height by late summer 2012.
2 World Trade Center
Work at 2 World Trade Center includes setting superstructure steel and installing form work and rebar. Back of house mechanical spaces are being fit out and completed. As of late spring 2012, the 2 WTC structure is nearing its completion to grade milestone and has the option of full construction pending real-estate market conditions.
1 World Trade Center
Under the Port Authority’s supervision, tower steel has risen to the 104th floor with the installation of glass curtain wall at the 79th floor and concrete floors poured to the 92nd floor. President Obama made a ceremonial visit to the site on Thursday, June 14 to sign the “topping out” beam and to get an update on the overall construction progress.
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 the rest of the year. Utilities, waterproofing, and other activities are progressing with both structural steel and façade installation now complete at the above-ground Memorial Pavilion. 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.
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.