Describir: Steel and timber structures /

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