(A) The walls of a residential swimming pool shall be designed to withstand the water pressure from within and to resist the pressure of the earth when the pool is empty, to a pressure of 2,500 pounds per square foot. In pools not entirely lined with a plastic liner, the pool floor shall be designed to withstand the water pressure from within and to resist the earth and hydrostatic pressure from below when the pool is empty, to a pressure of 2,500 pounds per square foot.
(B) The slope of the bottom of such a pool shall conform to the following:
(1) Not more than one foot in each six feet in gradual slope-type pools, where the slope is uniform for the entire length of the pool; and
(2) In hopper or bowled-type pools, not more than one foot in each ten feet to a depth of four feet six inches.
(2000 Code, § 15.88.070)