6.6.6Headroom and width

Staircases shall ensure adequate provision for:

  1. headroom
  2. minimum unobstructed width.


Stairs should have a minimum 2m clear head room (H) over the entire length and width of the stairway and landing, as measured vertically from the pitch line.

The overall floor opening should be checked:

  • for size to accept the stairs
  • to allow for sufficient headroom.

Minimum unobstructed width

In Northern Ireland and Scotland, stair widths should be in accordance with building regulations.

Where staircases form part of a means of escape, reference should be made to the relevant building regulations.