Which statement best describes the trigger conditions for the Swing Gate Entrapment Zone?

• A. The entrapment zone is triggered when the gap between the bottom of the moving gate and the ground is greater than 4 inches and less than 16 inches, or the distance between the pivot centerline and the end of the wall, pillar, or column exceeds 4 inches.
• B. The entrapment zone is triggered only when the gap between the bottom of the gate and the ground is greater than 6 inches.
• C. The entrapment zone is triggered only when the distance between the pivot centerline and the mounting surface exceeds 2 inches.
• D. The entrapment zone is triggered whenever the gate is moving, regardless of gaps.

Answer: (A)

Swing gates have an entrapment zone defined by specific clearances around the moving gate. The trigger conditions describe exactly when that hazardous zone is considered active. First, if the gap between the bottom of the moving gate and the ground is more than 4 inches but less than 16 inches, there’s enough space for a limb to become entrapped as the gate sweeps by. Second, if the distance from the gate’s pivot centerline to the end of any nearby wall, pillar, or column exceeds 4 inches, there’s a potential squeeze point near the hinge side. If either of these geometric scenarios exists, the entrapment zone is triggered, signaling a safety concern.

The other options don’t fit because a single 6-inch gap doesn’t capture the full specified range, a 2-inch pivot-to-mount distance is incorrect, and triggering merely because the gate is moving ignores the specific clearance conditions that define the zone.