Iron+&+Steel

CHARACTERISTICS:

__Iron__
 * It molds to any shape.
 * It's very strong in compression.
 * In tension, it's weaker than steel.
 * It breaks without warning.

__**Steel**__
 * It is one of the strongest materials used in construction.
 * It's strong in compression and tension.
 * It rusts.
 * In extremely high temperatures, it loses strenght.

> A structural sheet iron, usually galvanized, shaped in parallel furrows and ridges for rigidity. > Cheap, easy to transport, durable, strong, flexible, available anywhere. > At first, corrugated iron was used to cover roofs and walls in farms, for windmills and barns; later, it became popular all around the world, for being used to make poor houses. It was used during the First World War, for making shelters, which were used in the second one too, they were noisy, cold in winter and hot in summer, but waterproof too. Then, corrugated iron was used by modern artists and sculptors like an australian symbol. By 1890's, when the steel industry improved,corrugated iron became corrugated steel, it is the one we used nowadays, with certain modifications like zinc coverage. It is very popular in australian architecture, it's used for everything!
 * CORRUGATED IRON IN AUSTRALIA**
 * **What corrugated iron is**
 * **Characteristics**
 * **Uses through history**

An iron worker must has special skills, diversity job knowledge, great strenght and good physical condition, he should not be afraid of heights or suffer from dizziness, he must learn how to read blue prints, to calculate and should know about structures and sometimes, he will also need to direct crane operators to colocate beams in the right positions. Post-reading activity:**
 * STEEL & IRON WORKERS**
 * **What it takes to be an iron worker**
 * IRON AND STEEL. EACH ARCHITECTURE TELLS A STORY

I think, both skyscrapers like the new esthetics, have to do with the old cast iron building disappearance, because with the emergence of the Chicago school and the new materials, skyscrapers were the new boom and in order to built them, they had to use the last techniques which meant leaving behind the old way of casting iron. Besides this, the new modern esthetics stated that there were no need to use such ornament as it was been used at that moment, Mies van der Rohe, proclamed: less is more, and the //international style// was the new tendency.
 * 1) **On your wiki, 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** //**"**