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Fire Doors


malmofire14

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The wall between a flat and the common areas is a compartment walls and tested to BS 476 part 21 which includes stability as well as integrity, so it needs to remain stable as well as resist the passage of fire for the appointed time (60 mins). Fire doors are non-load bearing and tested to BS 476 part 22 for integrity, I have chosen to ignore insulation because it is not relevant in this discussion.

Therefore compartment walls have remain stable and resist the passage of fire for the full 60 minutes and fire doors only have to resist the passage of fire. Because fire doors do not have to remain stable you can have two doors protecting the opening, one from the habitable rooms to the hall and then a second (front door) from the hall to the common areas a combination of 60 minutes.

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