can be classified into three groups:
Palastro: are rolled sheets measuring 1x2 feet or 3x3 meters.
Bars: pieces are much longer than wide, solid and variable sections.
If the section of the bar is round and its diameter less than 5 mm, having a great length, is called wire. When the plates are very thin and very long called straps.
Profiles: bowls which sections are variables, whose length can vary between 5 and 12 meters. There are other profiles, special called used for other uses such as windows, p ort cars, aircraft structures, etcetera.
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