The hooks are for something called a "Bump & Run" operation, used for structural protection during wildland fires. Here is a training video that I found of the operation, though its not LAFD and uses straps, you should get the idea.
[url="http://www.youtube.com/watch?v=dc9SU_9jUwM&feature=results_video&playnext=1&list=PL28E589CD26AF7337"]http://www.youtube.com/watch?v=dc9SU_9jUwM&feature=results_video&playnext=1&list=PL28E589CD26AF7337[/url]
[url="http://www.youtube.com/watch?v=dc9SU_9jUwM&feature=results_video&playnext=1&list=PL28E589CD26AF7337"]http://www.youtube.com/watch?v=dc9SU_9jUwM&feature=results_video&playnext=1&list=PL28E589CD26AF7337[/url]