Civil Construction

1) Is steel a modern material?
Yes. Despite having been used for centuries, steel is an extremely modern material, besides being very resistant. Due to its versatility, it is recommended and used in several areas, such as packaging and civil construction.
An expanded range in various formats has given rise to packaging that is modern and attractive, as well as safe. In civil construction, steel is present in the most modern and daring of projects, such as the “Wire” Opera (Opera de Arame), in Curitiba; the Cittá América Corporate Assembly, Rio de Janeiro and the Bilbao Museum, Spain. These are just some examples of where steel was chosen for its beauty, safety and resistance.

2) Is steel environmentally friendly?
Yes. Steel is actually one of the least aggressive raw materials in terms of the environment – it is 100% recyclable. When steel scrap is used to produce new steel, there are valuable savings of natural resources and energy. Steel is also degradable. If a steel product is left to degrade (or rust) naturally, it will return to its original (iron oxide) state much quicker than many other materials.

3) Is there such a thing as corrosion-resistant steel?
Yes. They are called weathering steels, because when they are exposed to the elements, they form a thin impermeable layer of protective oxide, known in Brazil as patina, which impairs any further corrosion.
Resistance to atmospheric corrosion is at least three times greater with weathering steels than that observed on traditional structural steels. These steels also offer high mechanical resistance, good formability and excellent weldability.
With these exceptional properties, weathering steels can be use for building structures, bridges, viaducts, warehouses, pylons and many other projects. CSN produce family of weathering steels called CSN-COR 420 / 480 and 500. In Brazil they are known as “aços patináveis”.

4) And is galvanized steel corrosion-resistant?
Yes. To increase the service life of the steel sheets, a coating composed of almost pure zinc, is applied to its surfaces by hot dipping.
This allows the metal to be used in more aggressive atmospheric conditions, such as the sea or in industrial areas.
The coating significantly extends the service life of goods produced from these sheets, as zinc provides excellent atmospheric resistance.
For applications in very severe conditions, requiring even greater resistance, a thicker coating of zinc is applied.


5) Is it quick to build with steel?
Construction in steel is very fast, resulting in lower overall project conclusion costs and allowing anticipated return on investment. It is possible; for instance, to work on foundation laying, while at the same time, manufacture the structure. In addition to this, erection is fast and organized.
The use of steel in construction allows for better on-site organization and better use of space, avoiding unnecessary storage of construction materials and debris.

6) Are there any other advantages of building with steel?
Yes, there are many other advantages. Here are just some of them:

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