A flanged girder is a type of structural beam used in construction. It is composed of an I-bar, an H-bar, and an I-beam. An I-bar is a steel bar with a cross section that resembles the letter 'I'. An H-bar is a steel bar with a cross section that resembles the letter 'H'. An I-beam is a steel beam with a cross section that resembles the letter 'I'. Flanged girders are used to support large loads and provide stability to structures.