Developer Larry Silverstein, public officials and construction workers are scheduled to gather at the site Monday to see some workers sign the building's final steel beam before it's lifted 977 feet by a crane and placed on top of the building.
The tower is scheduled to open late next year. It is expected to be the first tower completed on the 16-acre World Trade Center site since the 9/11 attacks.
The building will primarily house commercial offices. A third of the office space will be set aside for the headquarters of the Port Authority of New York and New Jersey, which owes the trade center site.
