21. Stairs and ramps: (1) Stairs and ramps shall:
(a) be provided with non-skid finishes or strips;
(b) (paragraph revoked);
(c) have a wall or well-secured balustrade at least 1,070 mm in height around the landings and at least 900 mm in height on each side of the steps;
(d) have one handrail without any obstruction if such stairs and ramps are 1,100 mm or less in width;
(e) have 2 handrails if such stairs and ramps are more than 1,100 mm in width.
(2) Stairs shall have:
(a) uniform treads and risers in a same flight of stairs;
(b) risers with a maximum height of 200 mm and treads with a minimum depth of 230 mm;
(c) flights of stairs of at least 2 risers; however, where a flight of stairs has only 2 risers, the difference in level shall be indicated by means of a contrasting colour floor-covering at least 1 m in length from the ends of the flight of stairs and having the same width as the stair;
(d) no winders, unless there is a handrail on each side.
(3) The maximum gradient of ramps shall be:
(a) 1 in 10, in the cases of exterior ramps;
(b) 1 in 8, in the cases of interior ramps.
(4) A ramp used as an exit shall be surrounded by a fire separation with a fire-resistance rating of at least 3/4 of an hour.
(5) Openings in the balustrades of stairways and balconies shall not exceed 150 mm where a person may fall vertically more than 3 m. In a family-type day care centre, such openings shall not exceed 100 mm where a child may fall vertically more than 600 mm.