Describir: Construction des murs exterieurs des batiments de grande hauteur :

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