Which bridge is described as simply supported and of simple design, cheap and quick to construct with standardized members?

• A. Movable Bridge
• B. Truss Bridge
• C. Beam / Girder Bridge
• D. Rigid Frame Bridge

Answer: (C)

A simply supported beam approach is the most straightforward way to span a gap with minimal complexity. A beam or girder bridge uses horizontal members that rest on supports at the ends, carrying loads mainly by bending in the beams, with no moment being resisted at the supports. This makes the design very simple and the construction fast and inexpensive, especially when standardized sections such as steel I-beams or precast concrete girders are used. The approach is ideal for short to moderate spans where a basic, modular solution suffices. In contrast, a movable bridge adds machinery and complexity, a truss bridge involves many members and joints for efficiency over longer spans, and a rigid frame bridge requires more rigid connections and tends to be costlier. For a cheap, quick-to-build option with readily available components, a beam/girder bridge is the best fit.