Internal Stairs

Internal Stairs

  • Where change in level is 300mm or greater, steps should be provided in addition to ramp.
  • The minimum headroom above the stair pitch line is 2100mm.
  • Single steps should be avoided as cause a trip hazard.
  • Open risers should be not be used in public buildings.
  • Surface finishes should be firm, easy to clean and maintain.
  • The steps should be finished in slip-resistant material.
  • The finish should visually contrast with landing surfaces to help identify the top and bottom of the flight. If different materials are used their frictional characteristics should be similar to avoid trip hazard.

different colour step nosing

tactile warning surface

Multiple flight turning stairs

  • The maximum number of steps between landings is 12.
  • Spiral stairs and tapered treads should not be provided for use by the general public.
  • Where stairs have more than 36 risers in consecutive flights there should be at least one change in direction between flights.
  • Intermediate landing area to be provided on internal stairs over 12 steps.
  • Pattern surfaces should be avoided around stairs.
  • Circular stairs should be avoided.

landing area

Multiple flight straight stairs

  • The maximum number of steps between landings is 12.
  • Intermediate landing area to be provided on internal stairs over 12 steps.
  • Pattern surfaces should be avoided around stairs.
  • Circular stairs should be avoided.
  • Windows or doors should not open into landing areas by stairs
  • Headroom of 2100mm
  • On large stairs, intermediate landing areas with tactile warnings to be provided.