A type of steel pipe or column used in construction, especially in basements or as a structural support beam.
Named after the Lally Company, which manufactured these reinforced steel pipes in the early 20th century. A trademarked brand name that became generic.
A 'lally column' is one of those words where a brand name won the war—like how people say 'Kleenex' instead of 'tissue,' houses still have Lally columns even though other companies make them.
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