5. Circular staircases
5.1 General
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Definition
The third family is made up of circular staircases, i.e. staircases whose entire layout forms part of a cylinder, with the outside and inside forming two helixes, and whose tread line is circular. These staircases are often referred to as helical staircases or spiral staircases, when the treads are arranged on a central core. They are mainly found on :
as individual staircases for moving from one floor to the next with a minimum of space and hopper cross-section;
as fire escapes in multi-family buildings, with a step width corresponding to two passage units;
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as architectural staircases, isolated...
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Circular staircases
Bibliography
Regulations
Décret n° 69-596 du 14 juin 1969 fixant les règles générales de construction des bâtiments d'habitation (art. 5)
Arrêté du 1 er août 2006 fixant les dispositions prises pour l'application des articles R. 111-19 à R. 111-19-3 et R. 111-19-6 du Code de la construction et de l'habitation relatives à l'accessibilité aux personnes handicapées des établissements...
Norms and standards
- Wooden staircases – Specifications (classification index: P21-211) - XP P 21-211 - 09-03
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