Fires in stores and other commercial occupancies are severe threats to firefighters. More firefighters are killed per alarm in commercial fires than in any other commonly encountered fire. This class highlights tactics that have proven effective in dealing with them. Topics include common construction deficiencies; tactical differences between residential and commercial fires; hoseline selection, stretching, and placement; gaining entry/exit; cockloft fires; trusses and other lightweight roofs; cellar fires; and parapet wall collapses. This class focuses heavily on some of the more common causes of firefighter deaths and injuries in these dangerous structures and tips on how to keep your firefighters from falling prey to these common dangers.