Pentagon column reinforcement bar
notes: label: Description
content: Description: This piece of coiled reinforcement bar from a concrete building column was recovered from the wreckage of the Pentagon.
label: Description
content: Context: The Pentagon, completed in 1943 under the urgencies of World War II, was built to provide a central headquarters for an expanded U.S. military. On September 11, hijackers crashed an American Airlines Boeing 757 airliner into the portion of the Pentagon that recently had been reinforced as part of a building renovation and counterterrorism effort. The plane impacted just outside the building and slid nearly halfway through it. It totally destroyed a section of the first two floors of the five-story building. The heavily damaged upper floors initially held but, with an intense fire raging, soon collapsed. Many experts credit the use of coiled reinforcement in the columns (now common practice in earthquake regions) for making the Pentagon as resilient as it was and allowing the upper floors to survive long enough for some of the workers to escape.
label: Location
content: Currently on loan
place: label: recovered
content: United States: Virginia, Pentagon
title: label: Title
content: Pentagon column reinforcement bar
topic: label: associated subject
content: September 11 Terrorist Attacks
label: related event
content: September 11th Attacks
label: related event
content: Attack on the Pentagon
setName: label: See more items in
content: Military and Society: Armed Forces History, 9/11
label: See more items in
content: September 11
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2002.0289.02
label: accession number
content: 2002.0289
label: catalog number
content: 2002.0289.02
objectType: label: Object Name
content: Metal rebar piece
physicalDescription: label: Measurements
content: overall: 21 in x 13 3/4 in x 11 1/4 in; 53.34 cm x 34.925 cm x 28.575 cm