iron ore
The process removed the impurities from the iron creating steel. Therefore steel could be used to make bridges, buildings, and other things.
Steel
steel
steel bridges are made out of steel OBVIOUSLY !!!
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!
Stone bridges were built to get over rivers etc, before iron or steel was used.
Americans used steel to build bridges and skscapers.
Concrete and steel .
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.
Steel is used for its high tensile strength and the concrete is used for its high compression strength.
The most common materials used in bridge building are generally steel or concrete for larger bridges, and stone or wood for smaller bridges.