Describir: MANUAL of steel construction

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