Section R. 325.2123 - Walls, floors, ledges, and underwater seatingRule 23.
(1) Where the water depth is 6 feet or less, a swimming pool owner shall ensure that a swimming pool wall meets 1 of the following provisions: (b) Slopes uniformly down to the point of curvature at not more than 1 horizontal in 5 vertical.(c) Falls entirely within a plane sloped 1 horizontal in 5 vertical from the waterline down to the point of curvature where the wall cannot slope uniformly due to the necessary structural support of the upper wall.(2) Where the water depth is more than 6 feet, a swimming pool owner shall ensure that a pool wall meets 1 of the following requirements: (b) Is vertical to a water depth of not less than 64 inches and then curves to the floor with a radius of not more than the difference between the floor depth at that point and the depth at the point of curvature.(c) Is vertical to a water depth of not less than 64 inches and then slopes down to the floor at 1 horizontal in 2 vertical or steeper.(d) Is vertical to a water depth of not less than 68 inches and then slopes down to the floor at 1 vertical in 2 horizontal or less steep for a horizontal distance of not more than 6 feet from the pool wall. Add 1 inch to the vertical wall water depth for each additional 2 inches of total water depth deeper than 6 feet.(e) Slopes uniformly down to a water depth of not less than 6 feet at not more than 1 horizontal in 5 vertical.(f) Falls entirely within a plane sloped 1 horizontal in 5 vertical from the waterline down to a water depth of not less than 6 feet where the wall cannot slope uniformly due to the necessary structural support of the upper wall.(3) A swimming pool owner shall ensure that the junction between a pool wall and the floor is coved with a radius according to the following requirements, as applicable: (a) Not less than ½ of an inch.(b) Not more than 8 inches where the water depth is 6 feet or less.(c) Not more than 75 inches where the water depth is more than 6 feet.(4) A swimming pool owner shall ensure that the entire swimming pool floor slopes down toward the main outlets according to the following requirements:(a) Where the water depth is 4 feet or less, the swimming pool floor shall be sloped uniformly at not more than 1 vertical in 12 horizontal, where the water depth is 4 feet or less, except on the deeper side of a change of slope.(b) Where the water depth is between 4 feet and 6 feet, the floor shall be sloped uniformly at not more than 1 vertical in 3 horizontal on the deeper side of a change of slope to a water depth of not more than 6 feet.(5) Where the water depth is less than 6 feet, a swimming pool owner shall plainly mark the pool bottom at a change of floor slope with a color contrasting from the background color to allow the change of slope to be clearly visible. A swimming pool owner shall also extend the marking vertically up each sidewall at the change of slope.(6) The department may approve other floor slopes for special purpose pools, for scuba diving pools, or for the transition from the side of a diving area to a more shallow area.(7) A swimming pool owner shall ensure that a ledge does not protrude into a pool unless it is essential to support an upper wall. If a ledge is provided, then a swimming pool owner shall ensure that the ledge meets all of the following requirements: (a) Is not more than 4 inches in width.(b) Slopes downward from the wall.(c) Is designed to prevent its use as a walkway.(d) Is marked with a color contrasting from the background color to allow the ledge to be clearly visible.(8) A swimming pool owner shall ensure that underwater seating at a swimming pool other than a spa pool meets all of the following requirements: (a) Is located where the water depth is 4 feet or less.(b) Is located in a recessed area that provides for the safety of swimmers.(c) The front edge of the seating is plainly marked in a color contrasting from the background color to allow the seat to be clearly visible from in the pool and on the walkway near the seat.(d) The walkway adjacent to the underwater seating is marked in a manner that warns of the location of the submerged seat.Mich. Admin. Code R. 325.2123
1979 AC; 1983 AACS; 2001 AACS