Iron+and+Steel

Iron Is a material composed of iron and large amounts of carbon. Iron is very expensive, has the advantages of being molded in any way and is resistant to compression, but with the compression is weak and breaks without notice. Iron is used to build bridges, canyons and archs.

Steel Steel is a material composed of iron and a touch of carbon, is one of strongest materials used in construction, is strong in tension and compression. Steel is as expensive as iron but is heavier and has the disadvantage that it oxidizes and loses its strength in extreme temperatures. Steel is used in cables for suspension bridges, trusses, beams and columns.

“the old cast iron buildings died out. I'm not really sure whether the new skyscrapers killed them, or the new esthetics" I think that the old cast-iron buildings did not become extinct have evolved so equal have evolved the methods of iron and steel construction. Today skyscrapers, its form and aesthetics are the result of that evolution through the properties offered by the steel and iron in the construction.