Saturday, June 8, 2019

Fire Doors and Fire Exit Doors

Fire Doors and Fire Exit Doors

fire door is a door with a fire-resistance rating (sometimes referred to as a fire protection rating for closures) used as part of a passive fire protection system to reduce the spread of fire and smoke between separate compartments of a structure and to enable safe egress from a building or structure or ship.

A fire door is more than just the door itself, it refers to the door, the fixings, the fitting, the ironmongery (latches, handles, etc.) and the frame. Fire doors should be compliant and tested to BS 476 Part 22 or to the European equivalent BS EN 1634-1BS EN 13502-2, Fire classification of construction products and building elements sets the fire resistance classifications. 

This standard should not be confused with NFPA 80-2019 Standard for Fire Doors and Other Opening Protectives.  NFPA 80-2019 provides guidelines for the installation and maintenance of assemblies and devices used to protect openings in walls, floors, and ceilings whose main goal is to keep fire and smoke from moving throughout a building. Not including fabric fire safety curtains, this standard covers devices that have been the focus of a standardized fire test. Fire doors are designed to stop or slow down the spread of fire, smoke and toxic fumes from one part of a building to another, giving the building's occupants a chance to exit safely. The doors help protect the contents and structure of the building by limiting the fire spread


NFPA 80-2019 addresses information on swinging doors with builders hardware, swinging doors with fire door hardware, horizontally sliding doors, special-purpose horizontally sliding accordion doors or folding doors, vertically sliding fire doors, rolling steel doors, fire shutters, service counter fire doors, and host of others. The document can be used as a means to give guidance to authorities having jurisdiction (AHJs), so they can see if assemblies have met and maintained appropriate standards.


NFPA 80-2019 addresses information on swinging doors with builders hardware, swinging doors with fire door hardware, horizontally sliding doors, special-purpose horizontally sliding accordion doors or folding doors, vertically sliding fire doors, rolling steel doors, fire shutters, service counter fire doors, and host of others. The document can be used as a means to give guidance to authorities having jurisdiction (AHJs), so they can see if assemblies have met and maintained appropriate standards.


Here are some of the key features to look out for in terms of both domestic and commercial use:

  •      Fire doors are made up of various components. The door itself is usually made from a solid timber frame, but they can sometimes be covered again in fire-resistant glass.
  •      Around the edges of the door will be the intumescent seal, which is designed to expand when temperatures reach beyond 200°C to seal the gaps between the door and frame.
  •      For a private premises, it is advised to install fire doors where the risk is most imminent, for example the kitchen, or rooms which house lots of electrical devices. If your property is a new build, it should have been subject to regulations ensuring certain doors are fire doors – check this with the developer.
  •           For commercial or non-domestic properties, liability lies with whoever is deemed the ‘responsible person’ for that property or the employer. For example, the owner of the property, or the person in control of the property for trade reasons would be responsible.
  •      Thorough risk assessments must be carried out and it is advisable to get professional help with all fire-safety-related regulations. There is more to fire safety than just fire doors; escape routes, lighting, warning systems and equipment checks are also required.
  •         When you’re choosing a door it’s important to know what the different specifications mean.
  •           Around 42% of deaths during house fires are not from direct contact with the flames, but the consumption of smoke. With this in mind, keep an eye out for a doorset with cold smoke seals. These should be within the intumescent seal.

The same requirements as above will apply to a fire exit door. There are also additional requirements where the door is the final exit point of a building:
  1.   The door should open in the direction of evacuation.
  2.    There should be no locks or catches. Many use a push bar system that will open the door when pressed down. If the door is also a secure entrance, the lock/catches must self-open when the fire alarm sounds.
  3.    The final fire exit door must lead to a place of safety.
  4.    It must have a self-closing mechanism so that the door will shut behind people evacuating in order to contain the fire and smoke. This will also limit the oxygen going in to the building which will feed a fire.
  5.   The signage will need mandatory fire exit signs that are illuminated. Situated above the door. 

The following requirements must be complied with in respect of premises where necessary (whether due to the features of the premises, the activity carried on there, any hazard present or any other relevant circumstances) in order to safeguard the safety of relevant persons -
a.  Emergency routes and exits must lead as directly as possible to a place of safety;
b.  In the event of danger, it must be possible for persons to evacuate the premises as quickly and as safely as possible;
c.  The number, distribution and dimensions of emergency routes and exits must be adequate having regard to the use, equipment and dimensions of the premises and the maximum number of persons who may be present there at any one time;
d.  Emergency doors must open in the direction of escape;
e.  Sliding or revolving doors must not be used for exits specifically intended as emergency exits;
f.   Emergency doors must not be so locked or fastened that they cannot be easily and immediately opened by any person who may require to use them in an emergency;
g.  Emergency routes and exits must be indicated by signs; and
h.  Emergency routes and exits requiring illumination must be provided with emergency lighting of adequate intensity in the case of failure of their normal lighting.”

The “responsible person” is the landlord, employer, owner, and occupier. Anyone who uses or would require the use of the fire exit will have a responsibility to ensure that it remains clear, free from damage and that any contravention to this is reported to the employer, owner, occupier, landlord as soon as possible.

Sources:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/485420/BR_PDF_AD_B1_2013.pdf
http://firecode.org.uk/Code_of_Practice_hardware_for_fire_and_escape_doors.pdf

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