Describir: The safety of structures

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