Describir: Composite construction in steel and concrete :

 _    _      ___      _____    __   __    _____     ______    ____    
| |  | ||   / _ \\   / ____||  \ \\/ //  / ____||  /_   _//  |  _ \\  
| |/\| ||  / //\ \\ / //---`'   \ ` //  / //---`'   -| ||-   | |_| || 
|  /\  || |  ___  ||\ \\___      | ||   \ \\___     _| ||_   | .  //  
|_// \_|| |_||  |_|| \_____||    |_||    \_____||  /_____//  |_|\_\\  
`-`   `-` `-`   `-`   `----`     `-`'     `----`   `-----`   `-` --`  
                                                                      
  _____   
 |  ___|| 
 | ||__   
 | ||__   
 |_____|| 
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