steel bridges are made out of steel OBVIOUSLY !!!
iron and steel
Steel
brcause the bridge designer needed steel for the bridges construction, therefore steel had to be made for the bridge.
Concrete and steel.
Steel and or prestressed concrete. x
Arch bridges are made from arches. Arches are typically made from brick, reinforced concrete, stone or steel. Wooden arches are sometimes used for ornamental bridges, such as decorative footbridges in gardens.
Favorite materials for bridges include steel, aluminum, titanium, wood, stone, and reinforced concrete.
Steel is used for its high tensile strength and the concrete is used for its high compression strength.
John W. Fisher has written: 'Fatigueand fracture in steel bridges' -- subject(s): Bridges, Iron and steel, Fatigue, Fracture, Iron and steel Bridges, Steel, Structural, Structural Steel
Recycled steel is just as good as fresh steel made from iron ore from the earth. So recycled steel can be used to make anything. Vehicles, bridges, stainless steel, everything!
strong steel made it possible to build skyscrapers and suspension bridges
some materials used in bridges are concrete, steal, metal [may rust and fall if metal ] the first bridge may or may not have been made of wood