The short answer is that in modern construction you would not.
iron is used to make bridges (i think)
Corrosion and rust could be problems with iron bridges.
because it's a tough matter
Almost certainly, iron is our most common refined metal. Used in bridges, cans, autos, steamships, railways.
iron is used to make bridges (i think)
they were not as strong
they were not as strong
The problem with iron bridges was that the material was not as reliable as carbon steel, so it was replaced starting in the late 1800s and was completely unavailable for bridge building by the early 1900s. Bridges in the late 1700s were made of cast iron, but, by the early 1800s, cast iron gave way to wrought iron.
iron and steel
Iron as a metal in the pure form is somewhat fragile. But iron mixed with some impurities like Carbon is very strong which is used in the construction of bridges. This iron mixed with impurities is called as Cast Iron.
Similer to what we use for the world trade center and our bridges
When Bessemer developed his method of making steel the use of iron ore grew and so did making railroads, multistory buildings, and bridges.