No, you must not use only one plank in the Dominator barrier system. Both the top and bottom planks are essential to ensure the barrier performs as intended—especially in terms of visibility and accessibility.

The lower plank, also known as the Tapping Rail, is a critical safety feature for individuals who are partially sighted. Those using a cane rely on it to detect obstacles at ground level. Without the lower plank in place, their cane may pass underneath the barrier, causing them to miss it entirely and walk into the top rail, which could result in them falling into the hazard the barrier is meant to protect against.

The top plank typically contains high-visibility red and white panels, making the barrier easier for all road users to see. While the tapping rail can be a plain board, it should never be used in the top position, as it lacks the contrasting colours necessary for maximum visibility.

To comply with best practice and safety guidelines, always ensure that both planks are installed in their correct positions when using the Dominator barrier system.

Key Points:

• Both planks are required for the Dominator barrier to function properly.
• The lower plank (Tapping Rail) is essential for cane users to detect the barrier.
• Using only the top plank creates a significant hazard for the partially sighted.
• The top plank should always include high-visibility red and white panels.
• The Tapping Rail must not be used in the top position.