Which type of decking has impressions formed on its rib?

Composite decking is characterized by impressions formed on its ribs. This type of decking typically consists of a galvanized steel sheet that has a concrete topping. The impressions on the ribs are specifically designed to enhance the bond between the steel decking and the concrete that is poured on top during construction. This bond is crucial for the structural performance and integrity of the composite floor system.

The ribs, which are enhanced by these impressions, help to channel the concrete and provide mechanical interlocking, ensuring that loads are effectively transferred between the concrete and the metal deck below. This innovative design significantly improves the overall strength and durability of the flooring system, making composite decking a popular choice in modern construction where both structural efficiency and functionality are key considerations.

The other options, while related to decking systems, do not feature the specific rib impressions characteristic of composite decking.