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4.Where the barrier is composed of hori- and(b)the gate and barrier should have mounted on top of the pool structure,and zontal and vertical members and the dis- no opening greater than 1/2 inch within the means of access is a ladder or steps, tance between the tops of the horizontal 18 inches of the release mechanism. then(a)the ladder to the pool or steps members is less than 45 inches,the hori- should be capable of being secured, zontal members should be located on the 9. Where a wall of a dwelling serves as locked or removed to prevent access,or swimming pool side of the fence. Spacing part of the barrier,one of the following (b)the ladder or steps should be surround- between vertical members should not should apply: ed by a barrier which meets Section 1, exceed 1-3/4 inches in width. Where there Paragraphs 1 through 9.When the ladder are decorative cutouts,spacing within the (a)All doors with direct access to the pool or steps are secured, locked, or removed, cutouts should not exceed 1-3/4 inches in through that wall should be equipped with any opening created should not allow the width. an alarm which produces an audible warn- passage of a 4-inch diameter sphere. ing when the door and its screen, if pres- 5. Where the barrier is composed of hori- ent, are opened.The alarm should sound Section II.Indoor Swimming Pool. zontal and vertical members and the dis- continuously for a minimum of 30 sec- tance between the tops of the horizontal onds within 7 seconds after the All walls surrounding an indoor swim- members is 45 inches or more, spacing door is opened.Alarms should meet the ming pool should comply with Section 1, between vertical members should not requirements of UL 2017 General- Paragraph 9. exceed 4 inches. Where there are decora- Purpose Signaling Devices and Systems, tive cutouts, spacing within the cutouts Section 77. The alarm should have a mini- Section III.Barrier Locations. should not exceed 1-3/4 inches in width, mum sound pressure rating of 85 dBA at 10 feet and the sound of the alarm should Barriers should be located so as to prohib- 6.Maximum mesh size for chain link be distinctive from other household it permanent structures,equipment or sim- fences should not exceed 1-3/4 inch sounds,such as smoke alarms, telephones, ilar objects from being used to climb the square unless the fence is provided with and door bells. The alarm should automat- barriers. slats fastened at the top or the bottom ically reset under all conditions.The which reduce the openings to no more alarm should be equipped with manual Exemptions than 1-3/4 inches. means,such as touchpads or switches,to A portable spa with a safety cover temporarily deactivate the alarm for a sin- which complies with ASTM F1346-91 7. Where the barrier is composed of diag- gle opening of the door from either direc- listed below should be exempt from the onal members,such as a lattice fence,the tion. Such deactivation should last for no guidelines presented in this document. maximum opening formed by the diagonal more than 15 seconds.The deactivation But, swimming pools, hot tubs,and non- members should be no more than 1-3/4 touchpads or switches should be located at portable spas with safety covers should inches. least 54 inches above the threshold of the not be exempt from the provisions of this 8.Access gates to the pool should comply door. document. with Section 1, Paragraphs I through 7, (b)The pool should be equipped with a ASTM F1346-91. Standard Performance and should be equipped to accommodate a power safety cover which complies with Specification for Safety Covers and locking device. Pedestrian access gates ASTM F1346-91 listed below. Labeling Requirements forAll Covers for should open outward,away from the pool, Swimming Pools, Spas and Hot Tubs. and should be self-closing and have a self- (c)Other means of protection, such as latching device. Gates other than pedestri- self-closing doors with self-latching an access gates should have a self-latching devices, are acceptable so long as the device. Where the release mechanism of degree of protection afforded is not less the self-latching device is located less than the protection afforded by(a)or(b) than 54 inches from the bottom of the described above. gate,(a)the release mechanism should be located on the pool side of the gate at 10.Where an aboveground pool structure least 3 inches below the top of the gate is used as a barrier or where the barrier is 7