WTC Construction Update, December 2011Dec 12, 2011
4 World Trade Center
Steel erection is progress on the 57th floor. Concrete core walls are complete up to the 50th Floor, with concrete on metal deck complete to the 53rd floor. Curtain wall installation complete to 38th floor (except hoist areas and tower crane 3 areas, which are complete to 32nd floor).
3 World Trade Center
Concrete core and concrete slab work continue to progress on schedule. Concrete in the west core walls has been placed up to level 3, and the majority of the B1 level concrete slab has been poured. Jumping operations for the east tower crane are expected to occur within the next month.
2 Work Trade Center
The major below grade concrete superstructure elements are nearing completion, with the erection of the ground floor deck in progress. Installation of the PDC’s (Power Distribution Centers) has begun and will continue into the early part 1Q 2012.
1 World Trade Center
Structural Steel erection is currently at the 90th floor. Floor slabs have been cast through the 80th floor and core shear walls are up to the 79th floor. Curtain wall installation is complete up to the 63rd floor.
9/11 Memorial Museum
Electrical, Mechanical, Fire Protection, and IT work continues in the Pavilion and underground museum. The carpentry contractor is installing sheetrock at the west side of the 2nd floor of the Pavilion, and has also begun to frame out the interior ceiling.