What is flat bridges?

Flat bridges, also known as beam bridges or girder bridges, are the simplest and most common type of bridge. They are usually made of steel, concrete, or wood and consist of a horizontal beam or deck that spans a gap between two supports, such as abutments or pillars. Flat bridges are ideal for short to medium spans and are often used to cross streams, valleys, or small bodies of water. They are designed to support the weight of vehicles and pedestrians and can be constructed quickly and at a low cost. Despite their simplicity, flat bridges can be very strong and durable if designed and maintained properly.