B-1.1, r. 2 - Construction Code

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10.12. Swimming pools must be surrounded by a deck adjacent to the top of the walls. The deck must
(a)  have a non-slip surface;
(b)  have a minimum clear width of 1.5 m;
(c)  provide a clear passage of at least 900 mm behind a springboard, diving platform or accessory and its supporting structure;
(d)  provide a clear passage of at least 900 mm in front of or behind a structural column; and
(e)  be equipped with a guardrail having a height of 1,070 mm if a drop greater than 600 mm exists between the level of the deck and the level of the adjacent surface.
Despite the first paragraph, in the section of the pool where the water is 1,400 mm or less in depth, there may be a deck along one side of the pool only, provided that no point in the pool is further than 3.6 m from the edge of the deck.
O.C. 115-2013, s. 1.