B-1.1, r. 2 - Construction Code

Full text
10.32. The guardrails must
(a)  not have any opening allowing a spherical object of over 100 mm in diameter to pass through;
(b)  have a height of at least
i.  1,070 mm in the part of a springboard, diving platform or accessory that is not over water and that is 1 m high or more;
ii.  920 mm measured vertically to the top of the guardrail from a line drawn through the outside edges of the stair nosings;
iii.  1,070 mm around the landings.
O.C. 115-2013, s. 1.