The founding assumption of hospital fire strategy differs from other buildings: a significant share of occupants cannot evacuate unaided. That single sentence determines the whole design.
The horizontal evacuation principle
On inpatient floors the strategy is not to empty the building but to move patients into an adjacent fire compartment on the same floor. For that, each floor is divided into at least two compartments, and each compartment has enough space to hold its neighbour's patients temporarily.
That principle produces three design consequences:
- Compartment walls and doors must be genuinely continuous; if duct, cable and pipe penetrations are not fire-stopped, the strategy collapses.
- Door widths and manoeuvring space must suit bed movement; here an architectural constraint is a fire constraint.
- Smoke control is designed so it does not disturb the pressure difference between compartments.
Automatic suppression
Patient rooms and corridors are typically light hazard, but a hospital as a whole holds very different risks side by side: kitchen, laundry, records store, laboratory, generator room, medical gas manifold room, data centre. Each is assessed with its own hazard class; one density does not cover them all.
Quick response sprinklers are preferred in life safety areas; early activation matters most where occupants cannot evacuate.
Institutional sprinklers. In psychiatric and similar areas, special heads designed to provide no ligature point are used. This is one of the rare headings where fire safety and patient safety intersect directly.
Theatres and intensive care
Patient transfer here takes minutes and equipment must stay powered. Four headings dominate the design:
- Oxygen enrichment. A medical gas leak makes normally hard-to-ignite materials easy to ignite. The location and accessibility of shut-off valves is critical.
- Electrical continuity. Uninterruptible supplies and generator changeover must be tested together with the fire scenario.
- The pressure regime. Clean space pressurisation can conflict with smoke control, so priority must be defined scenario by scenario.
- Suppression choice. Water damage risk is assessed in equipment-dense areas — but the right response is to review the system type, not to remove the sprinklers.
Fire safety management
In a hospital the operational side matters as much as the passive and active systems:
- A fire team and assigned duties on every shift.
- Horizontal evacuation drills, including moving beds.
- Fire compartment doors not wedged open; magnetic hold-open devices and closure testing.
- No storage in corridors — the most frequently broken rule in hospitals.
- Hot work permits, with system impairments during refurbishment managed.
Refurbishment while operational
Hospitals are refurbished while running. Partial impairment of the sprinkler and detection systems is unavoidable in that period. The duration of the impairment, the compensating measures (fire watch, temporary detection, additional extinguishers) and the recommissioning tests must be set out in a written plan.
Frequently Asked Questions
Why is hospital evacuation strategy different?
A significant share of occupants cannot evacuate unaided, so the strategy is not to empty the building but to move patients into an adjacent compartment on the same floor.
Can one hazard class cover a whole hospital?
No. Patient rooms may be light hazard, but the kitchen, laundry, records store, laboratory and generator room are different classes and each is calculated with its own density.
Why is oxygen a risk in a theatre?
A medical gas leak enriches the atmosphere with oxygen and makes normally hard-to-ignite materials easy to ignite. Shut-off valve location and accessibility are critical.
What is needed for refurbishment while operational?
A written plan covering the impairment duration, compensating measures (fire watch, temporary detection, additional extinguishers) and the recommissioning tests.
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Download MEP Calc on the App StoreThe Turkish Regulation on Fire Protection of Buildings (BYKHY) · NFPA 13 (2025) · NFPA 101 · BS EN 12845:2015+A1:2019 · FM Global Data Sheets. For article numbers, thresholds and exemptions, the current regulation text published in the Official Gazette governs.