Iron+and+Steel


 * Iron & Steel**

Iron and Steel are a metallic elements used in construction. Steel is made with iron and a touch of carbon. Is one of the strongest materials. It's very strong in compression and tension, but are rusts because loses strength in extremely high temperatures. It's very useful to cables in suspension bridges, trusses, beams and columns in skyscrapers, roller coasters,etc. Iron is a metal that It's strong in compression and molded to any shape. Its disadvantages are that its breaks without a warning and is more weak that the steel in tension. Its applications are arch bridges, cannons, historic domes, etc

Write your opinion about this quotation from the recording: "//the old cast iron buildings died out. I'm not really sure whether the new skyscrapers killed them, or the new esthetics //"

 I think the reason of the death of the structures of cast iron is because the new styles and esthetics. As the years have passed other materials most economical and just as durable have been found .The iron tends to oxidize and takes decorative properties to the building.