Air, Heat, and the Second Floor
At 02:10, Engine 27 arrives first at a two-story brick rowhouse. Smoke is pushing from the second-floor windows in pulses, the glass is stained black, and the front door is hot. A neighbor says two adults live there and their car is in the driveway. The officer assigns you and your partner a 200-foot 1¾-inch line through the front door while a second crew takes the second floor. Your 45-minute cylinder reads 4,400 psi at entry. The low-air alarm activates at 33 percent of capacity. At 10 minutes, with the first-floor fire knocked down and the first-floor primary search complete, your gauge reads 2,900 psi and your partner's reads 2,400. The second-floor crew reports they have not reached the bedrooms. The ceiling paint above you is turning orange and bubbling, and the smoke layer is descending to about four feet from the floor.
1. Calculate both members' air consumption rates, the team's usable remaining time, and state when the crew must be out. Assume that getting from the second floor to the front yard takes 3–4 minutes and that the low-air alarm sounds at 33 percent (about 1,485 psi on this cylinder).
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Rates. Yours: (4,400 − 2,900) ÷ 10 min = 150 psi/min. Partner's: (4,400 − 2,400) ÷ 10 = 200 psi/min.
Team air is the lowest gauge, not the average. Plan on 200 psi/min.
Time to the alarm on the partner's cylinder. (2,400 − 1,485) ÷ 200 = 4.6 minutes. Yours is longer - (2,900 − 1,485) ÷ 150 = 9.4 minutes - and irrelevant, because you do not leave a partner behind and you do not split the team to stretch the average.
Working rule: be out before the alarm, not at it. With a 3–4 minute exit, the partner's margin is roughly half a minute to a minute and a half past the point where he should already have turned around. Add an unconscious victim and a drag, and the exit time roughly doubles.
Conclusion. The crew's effective search time on the second floor is close to zero. Notify command now, hold the stairway with the line if that is the assignment, and hand the unsearched floor to a fresh crew. If his rate is high because he is working hard, that is an additional reason to come out - heavy work is exactly when the gauge falls fastest, and the rate is not a constant.
2. The ceiling paint above you is bubbling and turning orange, and the smoke layer has dropped to about four feet. What is happening, and what do you do with the line and the door in the next 30 seconds?
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What it means. Orange, bubbling paint and a descending, pressurized smoke layer indicate a hot gas layer at the ceiling with enough heat to ignite - rollover or flashover conditions developing overhead. The fire is not out; it has moved from fuel-limited to ventilation-limited, and the open front door is feeding it oxygen.
Next 30 seconds. Stay below the layer. Do not open the ceiling broadly and do not take a window without telling command - a ventilation opening made now will pull fire toward it, possibly onto the second-floor crew or the search team. Cool the gas layer first with short pulses from the nozzle at the ceiling, delivered from a position at or near the doorway so the fire does not chase you, then reassess. Maintain door control: a chocked-open front door is a chimney, and if the line backs out, the door should not stay wide open behind it.
Report it. Plain language to command: "Engine 27, first floor, heavy heat, ceiling turning orange, backing out to the doorway." Command needs that information because it changes the ventilation decision and the timing of the second-floor search.
Principle. Change the atmosphere before you change your position into it - and never advance past a gas layer you cannot cool.
3. Command needs a choice: you continue the search for the bedrooms, you open the ceiling, or you exit and hand the second floor to a fresh crew. Choose and justify it with the numbers from the first task.
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Exit and hand off.
The numbers decide it. The team plans on the partner's 4.6 minutes to alarm, and a 3–4 minute exit without a victim already consumes most of that. A search of two bedrooms on an unfamiliar second floor, in zero visibility, under a descending hot layer, takes longer than the margin that remains. Continuing would put two firefighters with empty cylinders in a hot second-floor hallway - the exact situation mayday procedure exists for.
The ceiling opening is also a no. That is a job for a crew with air and a charged line in place. Doing it on the way out with a depleted partner converts a search problem into a fire-spread problem.
The handoff has to be explicit. "Command, Engine 27 to the front yard, partner's air at 2,400 and dropping, second floor not searched, bedrooms front and rear off the stairway, we are out." A fresh crew then enters knowing the layout, the air status, and exactly what is unsearched - which is faster and safer than a crew that climbs the stairs not knowing whether anyone is still up there.
Framing. The search is not "your" search; it is the incident's search. Refilling, rehabbing, and being available for the next assignment is a legitimate contribution, and pretending otherwise is how a rescue becomes two rescues.