Iron+&+Steel

The principal importance is because these materials provide stronger and taller structures with less expenditure than other materials, and they can produce greater unsupported spans over openings and interior or exterior spaces. The steel entirely changed the concept of the wall and the support.
 * What is the importance of the introduction of iron and steel as construction materials for architecture and urban planning?


 * Tension: Concrete usually is combined with steel, because the concrete is weak in tension forces. Steel and Concrete together are more resistant.
 * Cast Iron: Cast iron used in construction althoug this has/have alternative applications.
 * Bears: Columns are used with beams, and this bears the weight of the building.
 * Bending: Effect of bending is when the space between columns of building is not good, and for this reazon the beams usually have much effort. This is very important in earthquakes.
 * Vaneer: A veneer is a covering over another surface, and this used with brick, stone, wood and other materials.