Defend in place is a fire safety strategy that keeps you inside a protected part of the building rather than sending you down the stairs. You move behind fire-rated walls and doors, into a smoke compartment or area of refuge, and wait there while firefighters handle the fire. Hospitals, high-rise towers, nursing homes, jails, and assisted living facilities use this approach because full evacuation in those settings would injure or kill the people it’s supposed to protect.
Defend in Place Is Not Shelter in Place
The two phrases sound alike and mean different things. Defend in place is a fire response built around a building’s structural fire protection: fire-rated barriers, sprinklers, smoke compartments, and two-way communication. The building itself is your shield, and if your immediate area is compromised you move horizontally into the next compartment on the same floor.
Shelter in place applies to chemical spills, hazardous material releases, tornadoes, or security threats. It usually means sealing a room against outside air or locking down against an intruder. A tornado shelter-in-place order sends you to an interior room on the lowest floor. A chemical release order tells you to close windows and shut off ventilation. The structural demands have nothing to do with fire compartmentation, and confusing the two during an actual emergency can put you in the wrong place with the wrong protections.
Where You’ll Encounter Defend in Place
Hospitals and Nursing Homes
Healthcare facilities are the primary setting. Patients on ventilators, in surgery, or unable to walk cannot be carried down stairwells during a fire alarm. Staff move patients horizontally into the next smoke compartment on the same floor instead. The Centers for Medicare and Medicaid Services requires participating healthcare facilities to meet the 2012 edition of NFPA 101, the Life Safety Code, which mandates this compartmented approach.1CMS.gov. Life Safety Code
High-Rise Buildings
In a 40-story tower, sending everyone down the stairs at once creates gridlock. Stairwells become impassable, firefighters cannot get up, and people on upper floors are stuck in heat and smoke far longer than if they had stayed in their units. High-rise protocols typically instruct occupants on the fire floor and the floor directly above to evacuate while everyone else remains in their units with doors closed. Sprinklers, smoke barriers, and pressurized stairwells are designed to contain the fire to a small area.
Jails, Prisons, and Assisted Living
Detention facilities cannot let occupants move freely through the building, so staff use smoke compartments to relocate inmates away from the fire zone without breaching security. NFPA 101 has specific provisions for these occupancies. Assisted living and board-and-care homes operate under similar logic to hospitals: their fire plans address keeping residents in place, moving them to areas of refuge, and evacuating only when necessary. Facility plans have to be revised whenever a resident with special needs is admitted.
What to Do When the Alarm Sounds
Move to the nearest identified area of refuge and close every fire-rated door between you and the fire. This is the single most important thing you can do. A closed fire door activates the building’s compartmentation, and it’s the difference between a survivable environment and a lethal one.
Once you’re in the refuge area, use the two-way communication system to report your exact location and how many people are with you. That information lets firefighters prioritize their response. Tell the dispatcher or safety officer whether you see smoke, feel heat at the door, or have anyone with injuries or mobility limitations. If the communication system isn’t working, call 911 on a cell phone. As a last resort, signal through a window with something bright or reflective, but do not break the glass. An open window can draw smoke into your space.
If you work in a hospital or nursing home, your training covers the RACE sequence: Rescue anyone in immediate danger, pull the Alarm, Confine the fire by closing doors, and Extinguish small fires only if you can do so safely. The “confine” step is where defend in place begins. Move patients horizontally to the next smoke compartment if yours is compromised. Carrying patients down stairs is a last resort.
Staying Alive While You Wait
If smoke starts seeping under the door, stuff wet towels, clothing, or sheets into the gap. Stay low. The temperature difference between floor level and ceiling level in a real fire can be dramatic. Studies of hotel fires have shown temperatures near the floor at a survivable 87°F while the same hallway measured 137°F at ceiling height, hot enough to cause severe burns in seconds. Breathable air concentrates in the lowest two feet of the room.
Don’t open windows unless you need to signal for help, and even then close them again quickly. An open window changes the air pressure inside your space and can pull smoke toward you. If you have access to a bathtub or sink, fill it. The water is useful for re-wetting towels and gives you a supply if the situation deteriorates.
When to Leave Anyway
Staying put is not always the right call. If fire or heavy smoke breaches your refuge area and you can no longer maintain a survivable environment, evacuate. Specific warning signs:
- The air becomes difficult to breathe despite sealed doors. The compartmentation has been breached.
- The door feels hot to the back of your hand. Fire is directly on the other side and the barrier may be failing.
- Firefighters order evacuation. Follow their directions immediately.
- Cracking, popping, or groaning from the structure. Leave if you have a clear path.
If you do evacuate, stay low, move to the nearest stairwell, and go down. Never use elevators during a fire unless firefighters specifically direct you to an occupant evacuation elevator designed for that purpose. Those specialized elevators have two-hour fire-rated wiring, dedicated generator power, and waterproofed shafts. Standard elevators have none of that.
What Makes the Strategy Actually Work
Closing a door only protects you if the door and the walls around it can resist fire and smoke for a meaningful period. NFPA 101 sets the baseline requirements that jurisdictions adopt and enforce.2Cabinet for Health and Family Services. Life Safety Code
Walls and floor assemblies separating compartments carry fire-resistance ratings measured in hours, typically one to two hours depending on occupancy type and building height. In healthcare occupancies, the maximum travel distance to a smoke barrier door is 200 feet. Under the 2024 edition of NFPA 101, smoke compartments in healthcare facilities can be up to 22,500 square feet, or up to 40,000 square feet when all patient rooms are single-occupancy and protected with fast-response sprinklers.
Automatic sprinklers are the first active defense. They suppress or control a fire before it can breach the compartment, buying time for occupants and firefighters. Buildings relying on defend in place must have fully operational sprinkler coverage. Smoke barriers block smoke migration between compartments, and smoke dampers in ductwork keep toxic fumes from spreading through the HVAC system into areas where people are sheltering. A damper stuck open is functionally the same as no damper at all, which is why these components need regular inspection.
Areas of refuge must have a way to communicate directly with the fire command center or another approved control point. Directions for using the system, instructions for requesting help, and written identification of the location must all be posted next to the communication device.3National Fire Protection Association. Area of Refuge Requirements These systems have to work when the power is out, which means hardwired connections or battery backup.
Accessibility of Refuge Areas
An area of refuge that a wheelchair user cannot reach or fit into is not a refuge. Federal accessibility standards and building codes set specific requirements. Each area must include wheelchair spaces measuring at least 30 inches by 48 inches. The minimum is one space per 200 occupants served by that refuge area, though local authorities may reduce this to one space per refuge area on floors with fewer than 200 occupants.4ADA.gov. ADA Standards for Accessible Design Wheelchair spaces cannot reduce the width of the egress path, and no space can be blocked by more than one adjacent wheelchair.
Signs identifying areas of refuge must be tactile, with raised characters and Grade 2 braille. They must be mounted between 48 and 60 inches above the floor, with an 18-by-18-inch clear floor space centered on the characters so someone can approach and read them by touch.5U.S. Access Board. Chapter 7: Signs Instructions for using the refuge area during an emergency must meet visual character requirements but are not required to be tactile.
If you or someone you’re responsible for uses a wheelchair, walk the building before you need it. Find the areas of refuge, check that the tactile signs are where they should be, and confirm the communication device is reachable and labeled. That five-minute walk is worth more than any drill.