Steps and staircases are intended as an alternative to lift access in buildings and shall be of adequate design to allow all persons, with or without a disability, to travel safely and independently.
Stairs shall not be the only means of moving between floors. They shall be supplemented by lifts (see B-6.4) and/or ramps (see B-6.2). Staircases shall comply with the following general requirements:
a) The materials selected for the surface finish of the stairs shall be firm and slip resistant, especially if surfaces are likely to become wet due to location or use, or if spillage occurs. Slippery surfaces like granite, glazed tiles shall be avoided.
b) Shiny, polished surface materials that cause glare shall not be used for stairs or ramps.
c) Risers, treads, maximum number of risers per flight and minimum width of stairs shall be in accordance with 12.18.
d) The riser of a step shall not be open.
e) The stairs landing shall be minimum 1 500 mm deep (see also B-6.2.6). In case of one or two family dwelling units, it may be reduced to 1 200 mm.
f) Steps shall be of a consistent height and depth throughout the staircase.
g) Projecting nosing and open stairs shall not be provided to minimize the risk of stumbling.
h) Spiral stairs shall be avoided.
j) Stairs shall have handrails comply with the requirements given in B-5.5.2.