(1) Except as provided in Sentences (2) to (5), a handrail shall be installed on stairs and ramps in conformance with Table 9.8.7.1.
(2) Where a stair or a ramp is required to be at least 2 200 mm wide due to the occupant load, a handrail shall be installed such that no position on the stair or ramp is more than 825 mm from a handrail.
(3) A handrail is not required for stairs and ramps serving a house or an individual dwelling unit, where,
(a) interior stairs have not more than two risers,
(b) exterior stairs have not more than three risers, or
(c) ramps rise not more than 400 mm.
(4) Only one handrail is required on exterior stairs having more than three risers, provided such stairs serve a house or an individual dwelling unit.
(5) Except for stairs with winders, where a flight of stairs within a house or an individual dwelling unit consists of tapered treads, or a mix of tapered treads and rectangular treads, one handrail shall be installed along the narrow end of the treads.