Meaning of girder

gird•er

Pronunciation: (gûr'dur), [key]
— n.
  1. a large beam, as of steel, reinforced concrete, or timber, for supporting masonry, joists, purlins, etc.
  2. a principal beam of wood, steel, etc., supporting the ends of joists.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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