Great training video from the guys at tailboard toolbox on vertical ventilation! This video does an excellent job highlighting all of the extra considerations involved with vertically ventilating a flat roof.  Most of us don’t get the opportunity to fight these types of fires as often as we do residential and we need to make every effort to approach them as the different beasts they are. Commercial roofs require more equipment, more coordination between crew members, and all around more time to complete. Don’t wait until you are tasked with this assignment to figure out what you are doing, prepare while you have the opportunity to make mistakes!