Missouri's adopted residential code (IRC Appendix Chapter 42 / Section AG105) sets minimum pool barrier standards including 48-inch fences, self-closing self-latching gates, and limited openings, providing a baseline that local jurisdictions enforce.
Missouri jurisdictions that have adopted the International Residential Code apply Appendix G / Chapter 42 swimming pool barrier requirements. Outdoor private pools, hot tubs, and spas must be enclosed by a barrier at least 48 inches tall measured from finished ground level on the exterior side. The maximum vertical clearance from the ground to the bottom of the barrier is 2 inches. Openings cannot exceed 1-3/4 inches, and pedestrian gates must open outward away from the pool with self-closing, self-latching hardware mounted at least 54 inches above the ground. These standards are baseline minimums; cities may impose stricter rules but generally cannot drop below the IRC.
Failure to comply blocks final inspection and certificate of occupancy; municipalities issue stop-work orders, daily fines, and may order pool drainage until compliant.
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