B-1.1, r. 2 - Construction Code

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10.10. Swimming pool stairs have steps
(a)  with a uniform rise between 125 and 200 mm;
(b)  with a uniform tread of at least 250 mm;
(c)  with nosing in a contrasting colour; and
(d)  with a non-slip surface.
The stairs may not project into the pool.
O.C. 115-2013, s. 1.