fire doors

Building safety barriers

Fire doors are doors designed to resist fire and smoke, slowing the spread of flames between sections of a building.

They're required by building codes in stairwells, hallways, and other strategic locations.

Fire doors are rated by how long they can withstand fire—typically 20 minutes to 3 hours.

They must remain closed to function, hence the common signs: Keep fire door closed.

Opposites
fire safety function

fire doorswooden doors

Entrances made from lumber

interior doors · glass doors · screen doors · pet doors · louvered doors

access purpose

fire doorsarchways

Curved overhead passages

revolving doors · fire exits · emergency exits

barrier vs opening function

fire doorsair vents

Openings for airflow

ventilation shafts · open floor plans · pass-throughs · louvered doors · atriums

Family

fire, doors, fireproof, firewall, fire escape, fire door

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G