B-1.1, r. 2 - Construction Code

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10.08. The maximum slope of the pool bottom must be
(a)  300 mm vertically in 3.6 m horizontally for a water depth less than 1,400 mm; and
(b)  300 mm vertically in 900 mm horizontally for a water depth between 1,400 mm and 2,000 mm.
O.C. 115-2013, s. 1.