Our focus for the next couple of days will be on recognizing mental cues on your 360 degree size-up that can significantly become a game changer when the flow path is altered on the fire department arrival through opening doors or windows. Today, we focus upon Vertical Flows Paths and Elevated Outlets. The research conducted by ATF on elevated outlets following several LODD’s involving basement fires indicates more emphasis should be placed on rapid vertical fire spread into upper floors as this is the natural progression heated and bouyant fire gases want to follow.
Understanding a bi-directional flow path is a slower growth fire compared to a uni-directional flow. How would opening the front door influence fire growth and travel towards upper floor bedrooms if water is delayed? What would be the significance of controlling the door on this 1st floor fire with an open floor space containing a stairwell leading to a bedroom space attic spce with an open window as seen here?