>>12141842 lb
WRAY
https://www.fbi.gov/history/history-of-fbi-headquarters
For reasons of economy, the approving agencies insisted upon poured concrete as the major outside building material. The concrete used for the FBI building contained an aggregate of crushed dolomite limestone, a unique composition. While contrasting with the traditional marble, granite, or limestone government buildings, it echoed a major architectural style of the 1960s. The concrete was poured into reusable steel forms separated by metal ties. The ties remained in the concrete when the molds were removed. This technique produced an architectural feature of evenly spaced holes throughout the exterior.
https://www.whitehouse.gov/presidential-actions/executive-order-promoting-beautiful-federal-civic-architecture/
(b) “Brutalist” means the style of architecture that grew out of the early 20th-century modernist movement that is characterized by a massive and block-like appearance with a rigid geometric style and large-scale use of exposed poured concrete.