Describir: Steel and timber structures /

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