Architects' committee to announce which building is America's tallest

CHICAGO - An expert committee of architects is set to announce whether New York's new World Trade Center tower or Chicago's Willis Tower is the tallest building in the US.

The Height Committee of the Council on Tall Buildings and Urban Habitat is expected to announce its decision Tuesday morning in Chicago.

The committee is recognized as the final arbiter of building heights around the world. It has been weighing whether a design change means the needle atop 1 World Trade Center is part of the actual building or merely the equivalent of a broadcast antenna.

The tower built on the site of the Sept. 11, 2001, attacks is a symbolically important 1,776 feet (541 meters) tall with the 408-foot (124-meter) needle. It would be 1,368 feet (417 meters) tall without it. That's shorter than the 1,450-foot (442-meter) Willis Tower, but the number also holds symbolic weight as the height of the original World Trade Center.

There's more than bragging rights at stake; 1 World Trade Center stands as a monument to those killed in the terrorist attacks, and the ruling could dim the echo of America's founding year in the structure's height.

What's more, the decision is being made by an organization based in Chicago, whose cultural and architectural history is embodied by the Willis — formerly Sears — Tower that would be knocked into second place by a vote in favor of the New York structure.

"Most of the time these decisions are not so controversial," said Daniel Safarik, an architect and spokesman for the nonprofit Council on Tall Buildings and Urban Habitat. The 30 members of its Height Committee are meeting to render a judgment behind closed doors in Chicago, where the world's first skyscraper appeared in 1884.

The question over 1 World Trade Center, which remains under construction and is expected to open next year, arose because of a change to the design of its tower-topping needle. Under the council's current criteria, spires that are an integral part of a building's aesthetic design count; broadcast antennas that can be added and removed do not.

The designers of 1 World Trade Center had intended to enclose the mast's communications gear in decorative cladding made of fiberglass and steel. But the developer removed that exterior shell from the design, saying it would be impossible to properly maintain or repair.

Without it, the question is whether the mast is now primarily just a broadcast antenna.

According to the architecture firm behind the building, Skidmore, Owings & Merrill LLP, the needle will have a communications platform for radio and television equipment, but it will also be topped with an LED beacon that will fire out a horizontal blaze of light visible from up to 50 miles (80 kilometers) away on a clear night — a feature that has been described as a crowning beacon of hope.

The developers tested the lights Friday night, and hundreds of red, white and blue LED modules illuminated lower Manhattan.

Safarik said the committee could consider amending its height criteria — a move with much broader implications that could force a reshuffle in the rankings of the tallest buildings in the world.

If the matter weren't so steeped in emotion it might have set off some of the good natured ribbing emblematic of the history of one-upmanship between New York and Chicago. But 1 World Trade Center is a monument to American resilience admired well beyond Manhattan.

"I don't think anybody's going to argue with the pride in building that new tower," said 31-year-old software developer Brett Tooley, who works across the street from the Willis Tower. "Not only is it going to be the tallest building; it's going to be one of the strongest buildings in the history of America. It's a marvel of engineering."

"We take our hats off to them out here in Chicago and the Midwest," said Robert Wislow, chairman and chief executive of U.S. Equities, the firm that manages the Willis Tower. "And we welcome the building to the elite club of the tallest buildings in the world. Nobody's looking at this like a competition."

Still, the Willis has a central place in Chicago's history, speaking to the city's own tradition of recovering from adversity ever since the 1871 Great Fire and its history of creating architectural marvels, said Peter Alter, an archivist at the Chicago History Museum.

Skidmore, Owings & Merrill, headquartered in Chicago, also designed the Willis. Then known as the Sears Tower, it was completed in 1973 and remained the tallest building in the world until 1996 when the council ruled that the Petronas Twin Towers in Kuala Lumpur, Malaysia, had knocked it from the top spot.

The Burj Khalifa, in Dubai, is currently world's tallest building, standing 2,722 feet (830 meters).

And the Willis can still claim to get visitors up higher: The highest occupied floor in the 1,450-foot (442-meter) (not including antenna height), 110-story Willis Tower is still higher up than that of the 104-story 1 World Trade Center. In a sign of just how in dispute building measurements can be, the council says the Willis has 108 floors.

At the Willis' 103rd floor, thrill-seekers can step out into one of the glass boxes known as The Ledge that extend outside the building's steel frame and look straight down 1,353 feet (412 meters). — AP