Iron was used initially in a decorative role. It was later used for structural purposes until the production of steel.The two types of iron used in construction are cast iron and wrought iron. Cast iron`s earliest documented used was in China in pagoda construction in the 9th century. Cast iron is strong under compression but buckles under tension. Its columns are thinner leaving more space.Wrought iron is different in composition from cast iron. It has lower carbon content and includes fibrous material called slag. It is tough, ductile and resistant to corrosion. It is used to make items like desks, gates and beds.
With the advent of steel, the demand for iron has gone down as steel can deliver better performance than iron. Iron has been limited in production and now used primarily for aesthetics.The look of a gate or fine carpentry made of wrought iron is secondary to none. If you want a few eyeballs to pop out in appreciation, go ahead and stack some iron. You will see fingers caressing your gates,desks and enjoying their feel.