6023tube structuresTTen-USVocabulário Colaborativo em Artes e Arquitetura active approved tube structuresRigid frame structures with closely spaced exterior columns rigidly connected to spandrel beams to form a tubelike exterior framework that carries all lateral loads, as in the World Trade Center towers, New York City.

Source: AAT

http://vocab.getty.edu/page/aat/300001972

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