FAQ – dormakaba Door Closers for Fire Rated Glazed Doors
2. BS8300 states that “in general” fire doors should be of
a width greater than 900mm. Why have dormakaba
offered solutions at lower widths?
We have based the solutions on the minimum requirements of BS8300/ADM*, starting with a typical 826mm wide door and have then gone up in
approximately 25mm increments. A number of dormakaba high efficient door closers are capable of coping with doors at these and smaller sizes.
3. BS8300 refers to electrically powered hold open
devices. Which suitable products are available from
4. BS8300 refers to “swing free” controlled door closing devices. Which suitable products are available from dormakaba?
“Swing free” door closers operate without the resistance of a door closer; the closer is only activated in the event of a fire or power failure making them most suitable for door access to individual rooms rather than part of a circulation route. dormakaba offer: TS99 FL and TS73 EMF Free Swing option, RTS80 FLB and BTS80 FLB floor spring.
5. BS8300 talks about lower power sizes for non-fire
resisting doors in comparison to fire doors using a door closer. What if a higher power size is required?
As there is no legal requirement for a minimum closing force on non-fire doors the door closer can be adjusted below size EN3 (18Nm, as required for fire doors). However the door closer should always be adjusted to successfully close the door. If this increases the force to exceed BS8300/ADM* requirements, for example to overcome heavy duty seals on an acoustic door, dormakaba can supply a supplement to an access statement detailing the measures taken to ensure opening forces have been kept to a minimum.
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