Steel is used for its high tensile strength and the concrete is used for its high compression strength.
Concrete and steel.
Steel and or prestressed concrete. x
The steel rods are there to strengthen the concrete - making it reinforced concrete.
Favorite materials for bridges include steel, aluminum, titanium, wood, stone, and reinforced concrete.
steel bridges are made out of steel OBVIOUSLY !!!
Generally, because concrete has massive compression strength and steel has incredible tensile strength. Combined, they make amazingly strong structures.
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.
Concrete and steel .
Steel and concrete.
depends on the bridge type really. most are steel and concrete.
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
The primary building materials in cable-stayed bridges are steel, which is used in the cables and also as the reinforcing material in the concrete, which is the other primary building material.