Aluminum provides architecture, theme-matching and color flexibility advantages
The Empire State Building continues to demonstrate the usefulness and value of aluminum as a building construction material. In 1994, 5,460 windows in the historic building were replaced with aluminum frames. (The original steel frames had deteriorated, allowing for frosting, water and air leakage.) Through chemical analysis, the original paint color was matched and the restoration gained the approval of the Landmarks Preservation Society.
Expansive benefits gained from aluminum’s structural strength
Modern aluminum alloys can easily support the weight of heavy glass spans, thus maximizing the building’s capability for using natural sunlight. The George Bush International Airport uses high-strength aluminum framing to support large glass spans. The structure provides stunning views of the runways and jet taxi grounds. At Rice University, aluminum frameworks support a glass fenestration design that maximizes natural sunlight in the K-8th Grade and Magnet Schools. Buildings across the country benefit from maximum use of glass windows supported by high-strength, low-weight aluminum frames.
Primary building material in LEED-certified and sustainable buildings
The Sacramento, California Capitol Area East End Complex was the first LEED-certified building in the state of California. (LEED is a designation of Leadership in Energy and Environmental Design.) This certification was awarded in part due to a high-performance, nonreflective aluminum curtain wall that conserves energy by maximizing the use of sunlight. Aluminum is considered a vital component of green/sustainable buildings for several reasons. The metal is easily recycled and loses none of its properties during the process. Also, the recycling process reduces energy consumption by more than 90 percent, as compared to energy required to produce new aluminum from its source materials.
Looking forward: the use of aluminum to build America’s new infrastructure
Thousands of concrete and steel-reinforced bridge decks now require rebuilding due to their age and condition. Aluminum will be a critical building material in this new infrastructure. The metal and its alloys are lightweight, durable, corrosion resistant and infinitely recyclable. Nearly 75 percent of all aluminum produced is still in use today.
The History of Aluminum in Building and Construction
Aluminum was expensive and generally unavailable for architectural use until the early 20th century. Use of aluminum in buildings increased in the 1920s, primarily for decorative detailing. In construction applications, aluminum first appeared in roofing, flashing, wall panels and spandrels (the space between arches and structure enclosures). The first extensive use of aluminum in construction occurred in the Empire State Building (1930-1932). The tower structure and spire are built in part from aluminum, as well as components such as the entrances, elevator doors, ornamental trim and more than 6,000 window spandrels.
A Fact to Build On
When used for construction, aluminum structures can weigh 35 to 65 percent less than steel, while providing equivalent strength. The modern skyscraper could not be built without aluminum.