The Ontario Building Code | Height of Handrails
18.104.22.168. Height of handrails
(a) a straight line drawn tangent to the tread nosings of the stair served by the handrail, or
(2) Except as provided in Sentences (3) and (4), the height of handrails on stairs and ramps shall be,
(a) not less than 865 mm, and
(b) not more than 965 mm.
(3) Whereguards are required, handrails required on landings shall be not more than 1 070 mm in height.