Girder

The ceiling of Hinkle Fieldhouse in Indianapolis, Indiana, was constructed of large trusses built of riveted girders.

A girder is a support beam used in construction. Girders often have an I-beam cross section for strength, but may also have a box shape, Z shape or other forms. Girder is the term used to denote the main horizontal support of a structure which supports smaller beams. A girder is commonly used many times in the building of bridges, and planes.

The Warren type girder combines strength with economy of materials and can therefore be relatively light. Patented in 1848 by its designers James Warren and Willoughby Theobald Monzani, its structure consists of longitudinal members joined only by angled cross-members, forming alternately inverted equilateral triangle-shaped spaces along its length, ensuring that no individual strut, beam, or tie is subject to bending or torsional straining forces, but only to tension or compression. It is an improvement over the Neville truss which uses a spacing configuration of isosceles triangles.

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  • Girder — Gird er, n. [From {Gird} to encircle.] [1913 Webster] 1. One who, or that which, girds. [1913 Webster] 2. (Arch. & Engin.) A main beam; a stright, horizontal beam to span an opening or carry weight, such as ends of floor beams, etc.; hence, a… …   The Collaborative International Dictionary of English

  • Girder — Gird er, n. [From {Gird} to sneer at.] One who girds; a satirist. [1913 Webster] …   The Collaborative International Dictionary of English

  • girder — main supporting beam that carries flooring, 1610s, agent noun from GIRD (Cf. gird), on notion of something that holds up something else. Used of iron bridge supports from 1853 …   Etymology dictionary

  • girder — [n] main support beam I beam, joist, rafter, tiebeam, truss; concepts 471,479 …   New thesaurus

  • girder — ► NOUN ▪ a large metal beam used in building bridges and large buildings. ORIGIN from GIRD(Cf. ↑gird) in the archaic sense «brace, strengthen» …   English terms dictionary

  • girder — [gʉr′dər] n. [ GIRD1 + ER] a large beam, usually horizontal, of timber or steel, for supporting the joists of a floor, the framework of a building, the superstructure of a bridge, etc …   English World dictionary

  • girder — n. a steel girder * * * [ gɜːdə] a steel girder …   Combinatory dictionary

  • girder — UK [ˈɡɜː(r)də(r)] / US [ˈɡɜrdər] noun [countable] Word forms girder : singular girder plural girders a very large metal bar used for making the frame of a building, bridge, or other large structure …   English dictionary

  • girder — A continuous member usually running fore and aft under a deck for the purpose of supporting the deck beams and deck. Also see center girder longitudinal girder …   Dictionary of automotive terms

  • girder — [[t]gɜ͟ː(r)də(r)[/t]] girders N COUNT A girder is a long, thick piece of steel or iron that is used in the framework of buildings and bridges …   English dictionary

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