Comcast Center is a well-known skyscraper located in Center City in Philadelphia, Pennsylvania. It is considered as the tallest building in Philadelphia and the 15th tallest in the whole of the United States. It was originally known as One Pennsylvania Plaza until 2005 when it was named after Comcast, the building’s lead tenant.
Comcast Center History
The project to build the skyscraper was initiated by property developer Liberty Property Trust. The plan to build the building was announced in 2001. It was initially intended to be a 52-story skyscraper expected to cost around US$400million to build. But various redesigns later made the building into a 58-story tower and eventually making it the tallest building in the city. The Comcast Center was constructed in 2005 and was opened to the public in 2008. It was designed by architect Robert A. M. Stern.
The Comcast Center is a 58-story skyscraper that stands 297 meters or 975 feet tall. It is currently the tallest building in Philadelphia. The tower is made up of a central concrete core with steel framed floors. Its exterior features a glass curtain wall of lightly tinted, non-reflective and low emissivity glass. The tower slightly narrows inward going towards the top and features two cutouts near the building’s top on the north and south sides.
In order to prevent the tower from excessive swaying due to strong wind forces, Comcast Center employs a 300,000 gallon double-chambered concrete tuned liquid column damper considered to be the largest of its kind in the world. The Comcast Center received the Leadership in Energy and Environmental Design (LEED)rating in April 2009, making it the tallest LEED building in the US. The skyscraper was designed to use 40 percent less water than a typical office building. A public plaza designed at the base of the tower reduces the heat-island effect from the pavement by 70 percent. The low emissivity glass curtain wall of the tower blocks 60 percent of outside heat while allowing 70 percent of sunlight to go in.