[gur-der] 
| 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. |
| gird·er (gûr'dər) n. A beam, as of steel, wood, or reinforced concrete, used as a main horizontal support in a building or bridge. |
dər