Iron+&+Steel!

=Iron & steel! =

===**//" The old cast iron buildings died out. I'm not really sure wether the new skycrapers killed them, or the new esthetics" //**=== ===It was demostrated that cast iron is weak in tensile strenght, while steel is more uniformly strong. Sckyscrapers become higher with each passing day and the construction materials used in them must be the most resistant and of the best quality. Steel is more workable so it is more used in actuallity. ===