The Incas designed them from an architectural and engineering point of view and then built three types of bridge systems according to the shape of the structure: (i) beam type bridges, where the riverbed was not very wide and where mainly tree trunks were used as beams. The Incas designed them from an architectural and engineering point of view and then built three types of bridge systems according to the shape of the structure: (i) beam type bridges, where the riverbed was not very wide and where mainly tree trunks were used as beams. This is a list of bridges and viaducts in Peru, including those for pedestrians and vehicular traffic. The modular suspension bridges have a great success in Peru, the type of bridge developed by the Austrian company Waagner-Biro has the advantage of being simple and quick to implement. These. Thus, Peru historically developed a road network and bridges during the Inca Empire in the Tawantinsuyu region, building a cobblestone road network and suspension bridges with rope cables made of plant fibers from vegetation called Coya-Ichu. This is how bridges in Peru have evolved to meet. This is a list of different types of bridges. "The five main bridge designs". Each type uses a distinct structural system to. cable-stayed bridge, bridge form in which the weight of the deck is supported by a number of nearly straight diagonal cables in tension running directly to one or more vertical towers. The towers transfer the cable forces to the foundations through vertical compression.
