You will never see a construction project without using metals. Whether it is a residential structure or a commercial building, metals will always be part of the construction progress.
Metal is a necessary component in architecture and construction. It is always used because of the impressive qualities it possessed compared to other materials. Metal is proven tough, long-lasting, somehow affordable and a very versatile material.
The only external factor that can affect metals is rust or corrosion. Although, some metals has the property to resist rust and stains caused by harsh weather conditions. Some chemicals are applied on the metal to get rid of corrosion or in order to maintain its quality. Coatings, paints and other anti-rust solutions are used to protect the metal from developing unwanted effects.
You can always choose the kind of metal which is naturally corrosion-resistant but of course proper maintenance is advised. After many decades and centuries, metals may weaken especially the exposed ones when neglected.
As early as you see stains on the exposed metals, you must do something to prevent it from developing more and decay in the future.
Metals are used for exterior structures but also as beams, frames posts and even foundation. Unlike other materials in construction, you do not need to worry about replacing it from time to time. It is known for its durability, strength and versatility.
Of course, it needs to be maintained but spending lots of money for it is not likely to happen. If you know how to handle it with care, the metals you used will never decompose or break.
One of the qualities why it is commonly used in the construction industry is because it safe; metals are fire-resistant and will not collapsed unless abandoned and decayed.