What is the minimum knee clearance depth at a height of 27 inches?

The minimum knee clearance depth at a height of 27 inches is established based on accessibility requirements, specifically those outlined by the International Plumbing Code and standards for accessible design. The 11-inch measurement ensures that individuals who may need to utilize the knee clearance space—such as those in wheelchairs or with mobility limitations—can navigate comfortably underneath fixtures.

By specifying 11 inches for a height of 27 inches, the code provides sufficient space to avoid obstruction and allows for ease of movement across various settings, whether in residential or commercial environments. This depth is carefully calculated to be functional and practical for use, supporting the wider goal of making facilities more accessible to all.