Table 3.2: Widths of flights in private and common stairs

Table 3.2 Widths of flights in a private stair and a common stair in a block of dwellings Category | Minimum unobstructed width (mm) Private stair - (a) providing access to one room only (not being a kitchen or living room) or to a bathroom and a water closet | 600 (b) other than (a) above* | 800 A common stair in a block of dwellings | 1000 Note * where the private stair - (a) is part of the circulation route within the entrance storey; or (b) gives access to the circulation route within the principal storey, the unobstructed width should be not less than 900 mm.