5. Staircase smoke extraction (DF 5)
Enclosed staircases can be de-ventilated by natural sweeping or overpressurization in relation to the adjacent volume(s).
By "natural sweep", we mean that at the top of the stairwells, there is a hatch or glazed opening that can be opened manually or controlled by the SSI.
Mechanical smoke extraction is strictly prohibited.
A non-enclosed staircase does not need to be cleared of smoke if the volumes with which it directly communicates (levels, rooms, corridors, etc.) are not required to be cleared of smoke.
For smoke-free areas, the staircase must be :
separated from lower levels by enclosure screens ;
The volume with which it communicates can be used to remove smoke from the upper...
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Staircase smoke extraction (DF 5)
Smoke extraction in enclosed horizontal corridors and halls accessible to the public (DF 6)
Bibliography
Also in our database
Standards
- Fire safety systems (SSI) – Evacuation alarm equipment (EA) – Design rules (classification index: S61-936) - NF S61-936 - Mai 2013
- Fire safety systems (SSI) – Safety power supplies (AES) – Design rules (classification index: S61-940) - NF S61-940 - Juin 2000
- Fire safety systems (SSI) – Operating and maintenance rules (classification index: S61-933) - NF S61-933 - Septembre 2011
Regulations
Arrêté du 25 juin 1980 portant approbation du règlement de sécurité contre les risques d'incendie et de panique dans les établissements recevant du public. Since then, this decree has been amended many times, and in view of all these changes, the text in force is that published after the latest amendment on 1 er January 2018 by Légifrance.
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