Curbs up to 9 inches in height are considered to be what type?

Curbs that are up to 9 inches in height are classified as shower units. This classification is based on their typical use in bathroom designs, particularly in curbless and traditional shower applications. This height is specifically designed to provide adequate water containment while allowing for ease of access, especially in a shower setting.

When designing or installing a shower, the curb serves the functional purpose of keeping water from spilling over to the bathroom floor, helping to maintain a safe and dry environment outside the shower space. Understanding these classifications is essential for ensuring that the installation adheres to building codes and standards, particularly when it comes to waterproofing and drainage requirements.

In contrast, the other options represent different contexts in which curbs might be used, with shower units standing out specifically for their height and role in facilitating the shower experience.