The alarm system must be equipped with a manual means, such as a touchpad or switch, to temporarily deactivate the alarm for a single opening. The alarm must automatically reset under all conditions. The audible alarm must activate within 7 seconds and sound continuously for a minimum of 30 seconds after the door or its screen is opened and be capable of being heard throughout the house during normal household activities. The alarm must be listed in accordance with UL 2017. All doors with direct access to the pool through that wall must be equipped with an alarm that produces an audible warning when the door or its screen is opened.The pool must be equipped with a powered safety cover in compliance with ASTM F1346 or.Where a wall of a dwelling serves as part of the barrier, one of the following conditions shall be met:.The gate and barrier must have no opening greater than 0.5 inches (12.7 mm) within 18 inches (457 mm) of the release mechanism.The release mechanism must be located on the poolside of the gate at least three inches (76 mm) below the top of the gate.Where the release mechanism of the self-latching device is located less than 54 inches (1372 mm) from the bottom of the gate, the release mechanism and openings must comply with the following: Gates other than pedestrian access gates must have a self-latching device.Pedestrian access gates must open outward away from the pool and be self-closing and have a self-latching device. Access gates must be equipped to accommodate a locking device.Where the barrier is composed of diagonal members, such as a lattice fence, the maximum opening formed by the diagonal members must not be more than 1.75 inches (44 mm).The maximum mesh size for chain link fences must be a 2.25-inch (57 mm) square unless the fence is provided with slats fastened at the top or the bottom that reduce the openings to not more than 1.75 inches (44 mm).Where there are decorative cutouts within vertical members, spacing within the cutouts must not exceed 1.75 inches (44 mm) in width. Where the barrier is composed of horizontal and vertical members and the distance between the tops of the horizontal members is 45 inches (1143 mm) or more, the spacing between vertical members must not exceed 4 inches (102 mm).Spacing between vertical members must not exceed 1.75 inches (44 mm) in width. Where the barrier is composed of horizontal and vertical members and the distance between the tops of the horizontal members is less than 45 inches (1143 mm), the horizontal members must be located on the swimming pool side of the fence. Solid barriers that do not have openings, such as masonry or stone walls, must not contain indentations or protrusions except for normal construction tolerances and tooled masonry joints.Openings in the barrier must not allow passage of a four-inch diameter (102 mm) sphere.Where the barrier is mounted on top of the pool structure, the maximum vertical clearance between the top of the pool structure and the bottom of the barrier must be four inches (102 mm). Where the top of the pool structure is above grade, such as an above-ground pool, the barrier may be at ground level, such as the pool structure, or mounted on top of the pool structure. The maximum vertical clearance between the grade and the bottom of the barrier must be two inches (51 mm), measured on the side of the barrier that faces away from the swimming pool. The top of the barrier must be at least 48 inches (1219 mm) above grade, measured on the side of the barrier that faces away from the swimming pool.Outdoor swimming pools including in-ground, above-ground, or on-ground pools, hot tubs, and spas, must have a barrier that complies with the following:
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