The first section of the One World Trade Center’s spire was lifted to the top of the 104-story building today. The 18 steel sections of spire were fabricated at a plant near Montreal, Canada. Half of the sections are now on-site, having arrived by barge, with the others scheduled to arrive soon by truck. When it’s topped out One World Trade Center will be the tallest building in the Western Hemisphere at 1,776 feet.

Photo: Mario Tama, Getty Images

Construction of the spire is being completed by the ADF Group Inc., a Quebec based engineering firm, and New York’s DCM Erectors Inc., the primary steel contractor for the tower. At the top of the tower will sit an aircraft warning beacon along with LED lights in various colors. The spire will also provide transmission services for radio and television broadcasts. The tower is scheduled to open in 2014.

The World Trade Center complex will include three other high-rise office buildings being developed by Larry Silverstein. The smallest of his buildings, Four World Trade Center, will be completed next year. The second-tallest tower will not be developed until the real estate market improves. The site also features the National September 11 Memorial & Museum where the Twin Towers once stood.