Staircases

6.6
See Also:
3.1
3.2

6.6.14Concrete staircases

Concrete staircases shall be suitably constructed using appropriate materials to provide satisfactory performance.

Precast construction

Account should be taken of:

  • workmanship, particularly at the top and bottom of each flight
  • accurate location and levelling of units.

In-situ construction

Guidance for in-situ concrete can be found in Chapter 3.1 ‘Concrete and its reinforcement’.

Shuttering for concrete elements or connections should be constructed to ensure a consistent rise and going.

Chairs or spacing blocks should be used to provide cover to reinforcement in accordance with Table 5.

Table 5: Cover for reinforcement used in concrete stairs

LocationMinimum cover (mm)
Internal staircases25
Staircases open to the weather50

Formwork should be struck in accordance with the design information. This is normally:

  • after 24 hours for side formwork
  • after 28 days for soffit and support formwork.

Floor Finishes

For both precast and in-situ staircases, allowance should be made for:

  • the thickness of finish at the top and bottom of flights
  • preformed nosings or non-slip finishes, where specified.