What is the minimum depth required for knee clearance?

The minimum depth required for knee clearance is 8 inches. This specification ensures that there is adequate space for a person's knees when using fixtures such as sinks or countertops, which is particularly important for accessibility considerations. Providing sufficient knee clearance helps accommodate individuals who may be seated or in a wheelchair, ensuring they can comfortably use plumbing fixtures without obstruction. The requirement for an 8-inch depth promotes both safety and usability within the plumbing code, aligning with standards for universal access. This consideration is crucial for creating spaces that can be used by everyone, regardless of their mobility status.