Aluminum Cladding, Recovered
Photo credit: 9/11 Memorial staff
Accession Number: C.2011.179.9
Dimensions: 20.5 in X 28.5 in X 100 in
Dimensions (Metric): 52.07 cm X 72.39 cm X 254 cm
Credit Line: Recovered from the World Trade Center site after September 11, 2001
Collection 9/11 Memorial Museum, Courtesy of the Port Authority of New York and New Jersey
Aluminum covering shaped to encase steel beams.
A layer of aluminum covered each structural steel column that formed the facades of the Twin Towers. The aluminum alloy was created especially for the World Trade Center and gave the buildings a unique reflective surface. Thin and lightweight, most of the aluminum cladding separated from the steel during the collapse of the buildings on September 11, 2001.