Closed fire doors offer excellent protection when a blaze breaks out, providing people with the time they need to evacuate the building safely. However, if fire doors are left open, they do nothing to prevent smoke and fire from rapidly spreading, drastically reducing the chances of survival.
By law, fire doors must be kept closed when not in use. Automatic fire door closers are devices that ensure a door returns to the closed position after someone has passed through the doorway and that the door achieves a tight fit in the frame. A closer should close the door whether it has been fully or partially opened and should be capable of overcoming resistance from the hinges, latch, or seals – eg. when the door or if the frame swells in hot weather.
What Are The Different Types Of Automatic Door Closers For Fire Doors?
As there are many different door closer types suitable for fire doors, it is important to select the product that most suits the type of door, the application, and the premises.
There are four different types of closer to consider:
1. Controlled door closers, such as rack and pinion closers or cam action closers. These are the best choice for BS EN 1154 – Building Hardware Controlled Door Closing Devices This standard focuses on several areas of quality, including corrosion resistance, fire resistance, closure power, and durability.
2. Electrically powered free swing closers, which are recommended if it is necessary to comply with BS EN 1155 – Electrically Powered Hold-Open Devices. This standard applies to fire doors fitted with hold-open devices, which allow them to be legally kept open and ensure automatic closure in response to an electrical impulse from the fire detection system or an audible alarm.
3. Concealed door closers, which are ideal for internal FD30-rated fire doors. A straightforward spring back chain is housed within the door, forcing it to close automatically after opening. As the chain is concealed, it offers an aesthetically pleasing solution.
4. Overhead door closers, mounted on the surface of the door. To fit this type of closer, either a regular arm, parallel arm, or top jamb mount version, there should be sufficient vertical clearance space for the device to operate safely.
For Expert Professional Advice, Contact Mila Maintenance
Our fire risk assessment service will ensure that every component in your fire doors meets international standards and provides the necessary protection. We can also advise on the most suitable door closers for your premises so, to find out more, please contact us today on 0808 100 8881.
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