A fire door is a type of door, or closure used as a passive fire protection item within buildings to prevent the spread of fire. It is usually the only means of allowing people to pass through a fire-resistance rated wall assembly.
Components
Components
- Fire doors are made of a combination of materials, such as:
- Steel
- gypsum (as an endothermic fill)
- Vermiculite-boards
Together, these components form a system which holds the rating.
Apart from the door leaf, there is the doorframe, the door hardware and the structure that holds the fire door assembly in place.
Door Hardware
Door hardware includes, but is not limited to:
- manual or automatic closing devices
- locks
- latches
- hinges
Seals
Edges of a fire door usually need to have fire rated seals which can be composed of:
- An intumescent strip, which expands when exposed to heat
- Neoprene weatherstripping
*intumescent = Materials that expand in volume when exposed to heat or flames exceeding a specified temperature.
