what was on the top of the world trade center
a tall communication antenna
title: 3 World Trade Center text: height of 1000 feet, thus officially reaching supertall status and exceeding the roof height of neighboring 4 World Trade Center. On June 23, 2016, 3 World Trade Center's core was topped out. In a ceremony held at the base of the building, a 2-ton bucket of concrete was signed by workers, and executives, including developer Larry Silverstein, and was hosted up with an American flag, which was also used with the topping out of 7 and 4 World Trade Center, to the top of the tower. On the evening of August 11, 2016, a construction crane struck one of 3 title: One World Trade Center text: the building began a public marketing campaign for the building, seeking to attract visitors and tenants. One World Trade Center's steel structure topped out at the nominal 104th floor, with a total height of , in August 2012. The tower's spire was then shipped from Quebec to New York in November 2012, and the first section of the spire was hoisted to the top of the tower on December 12, 2012, and was installed on January 15, 2013. By March 2013, two sections of the spire had been installed. The spire's completion was scheduled for April 29, 2013, but bad title: Construction of the World Trade Center text: adjacent modules were not at the same floor. The building's core housed the elevator and utility shafts, restrooms, three stairwells, and other support spaces. The core of each tower was a rectangular area 87 by 135 feet (27 by 41 m), and contained 47 steel columns running from the bedrock to the top of the tower. The columns tapered after the 66th floor, and consisted of welded box-sections at lower floors and rolled wide-flange sections at upper floors. The North Tower's structural core was oriented with the long axis east to west, while the South Tower's was oriented north to title: One World Trade Center text: weather delayed the delivery of the final pieces. On May 10, 2013, the final piece of the spire was lifted to the top of One World Trade Center, bringing the tower to its full height of , and making it the fourth-tallest building in the world at the time. In subsequent months, the exterior elevator shaft was removed; the podium glass, interior decorations, and other finishings were being installed; and installation of concrete flooring and steel fittings was completed. A report in September 2013 revealed that, at the time of the report, the World Trade Center Association (WTCA) was negotiating title: Construction of One World Trade Center text: leaving the building to rank around 30th place among all other skyscrapers. Construction slowed again from late June till mid July due to high temperatures which caused the building to remain at roof level, leading to a delay in the installation of the antenna spire. With temperatures easing by July 16, construction crews began installing parapet steel at the top of 1 WTC. On July 18, the first node steel was installed. On July 31, 2012, all corner parapet columns, also called "node steel", were installed around the perimeter of the tower. A special beam, signed by the U.S. President