Door closers for Fire and Escape Doors

Fire-resisting doors are usually required to be self-closing, in accordance with building regulations. (other than those to locked cupboards, service ducts, and internal doors in flats and dwelling houses)

 

Door closing devices fitted on fire-resisting doors must be able to:

• Close the door leaf reliably from any angle to which it has been opened

• Overcome the resistance of a latch or any seals when fitted

 

 

Door closing devices fitted to fire-resisting doors are required to perform one of two functions, dependent on whether or not a latch is fitted to the door. These functions are considered “essential” in terms of the ability of the doors to achieve their intended fire resistance rating.

 

• Latched door: to close the door in a controlled manner into a position where the latch engages. In this case, once the latch is engaged, such closers will have no further essential role to play.

• Unlatched door: to close the door in a controlled manner into its frame or, in the case of double swing doors, to its dead center closed position, and maintain this condition for a period during fire exposure until the heat activated sealing system takes over the role of maintaining the door in the closed position.

 

Critical Recommendations:

3.2.1 If placed on the market after 1 July 2013, the door closing device and its accessories:

• Must be CE Marked to BS EN 1154- Building hardware-Controlled door closing devices, including annex A,

• And preferably, should be provided with additional product certification by an approved third party certification body.

 

3.2.2

The product and any accessories must have demonstrated their suitability for the intended purpose, by inclusion in satisfactory fire tests to BS EN 1634-1 or BS EN 1634-2, on a type of door and configuration in which will be used. This evidence should be provided by an approved third party certification or testing body.

 

3.2.3

The strength and features of the control must be correct for the size of door to which it is fitted, bearing in mind:

• Door size and mass.

• The application to the door.

• Whether subject to other factors such as differential air pressure, draughts, heavy traffic use, abusive treatment.

• Whether door is to be latched or unlatched.

• Whether smoke or other seals are fitted to the door.

• Whether the door is on accessible route and therefore needs to satisfy Part M of the Building Regulations.

 

3.2.4

Face fixed overhead controls should NOT be used on unlatched doors where the arm assemblies or components are made of material with a melting point of less than 800°C unless proven by specific tests.

 

3.2.5

Concealed overhead controls should NOT be used unless they are provided with any specially designed and proven intumescent provided with any specially designed and proven intumescent protection which might be stipulated in the fire test report or field of application data sheet.

 

• Concealed closers are installed into the door leaf and/or its frame. On timber doors, they are mortised into the fabric of the assembly causing a significant amount of the fire-resisting door material to be removed and intumescent protection of some kind will usually be required to protect the door from early integrity failure. This intumescent protection should be supplied by the manufacturer with every concealed closer intended for use on a timber fire-resisting door. It is particularly important with these closing devices to check that the fire test evidence is relevant to the intended door application and material. Some concealed closers have been successfully tested in steel doors without the need for intumescent protection.

 

Would you like planning and picking Right door closer for your commercial building? D&D Hardware has skilled door Hardware Consultants on staff.

 

D&D have both fire rated and non-fire rated door closers for difference applications.

Fire rated door closers are in accordance with building regulations, CE Marked to BS EN 1154- Building hardware- different power size(EN1-2, EN2-3, EN3-4, EN4-6) available for different door width/weight. Tested to EN 1634 standard, 1200 minutes fire rated. Suitable for both commercial & Residential application doors.

 

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Contact: David Jian

Mob: 0086-139 2903 7292

Email: David@dndhardware.com, sales@dndhardware.com

 

Jobby Zhang

Mob: 0086-137 2599 9617

Email: jobby@dndhardware.com