The 4-Inch Sphere Code: Why Baluster Openings Must Reject a 4-Inch Ball
The 4-Inch Sphere Code exists to ensure that guardrails and balusters remain safe for children by preventing them from getting their heads or limbs trapped in gaps. Building codes in the United States mandate that any opening in a guard must not be large enough for a 4-inch diameter sphere to pass through. This simple…