Steel is an extremely reliable material. There are many structures that were built using steel in the twentieth century that are still as reliable today as they were the day they were constructed. This is because steel can last more than 50 years without wearing out. Steel buildings are more cost effective then other building materials. They are also faster and easier to construct as they are custom made to fit. Here is a list of five of the most iconic structures that have passed the test of time. The Eiffel Tower The Eiffel Tower was built in 1889. It was named after the engineer that designed it, Gustave Eiffel. After its completion, it retained the record of being the tallest structure in the world for 40 years. The tower was put up using 7,300 tons of steel. Although the tower was initially constructed to serve as the entrance to 1889 World fair, it is now one of the most recognisable sites in France. The Brooklyn Bridge The Brooklyn Bridge links Man