Describir: Erection of steel building frames, prep. especially for home study

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