Petruccelli L.T.D of North America says; There are also codes concerning pool barriers and gate hardware. Generally, a perimeter wall or fence must be at least 4 ft. tall and equipped with self-closing, self-latching gates. Fence boards or balusters must not be spaced more than 4 in. apart. Chain-link fences must have openings no larger than 1-1/4 in. wide.
