When I talk about upper layer development in compartments for fires, this is what I’m talking about. This is from a Home Depot fire back in 2022. This is a well established upper layer inside the store. The temperatures inside that smoke layer are going to be 1500-2000 Fahrenheit (800-1100 Celsius). When looking at this notice how there is a very sizeable area of tenability about 3 feet off the floor. This is why crawling is recommended in fires. Nothing in that area is actively burning or even