Iron+and+Steel

**//Pre-reading questions://**
These metals are used in Architecture and Urban Planning in form of tubes and bars.
 * How are iron and steel used in Architecture and Urban Planning?**

These metals are more difficult to mold that concrete but they are stronger that concrete. Also, stainless steel is resistant to weathering.
 * Whay do you think are the advantages and desadvantages of each of these materials?**

Cast Iron

Steel