Guide to the ADA Standards

Where knee and toe space is required at an element, it must be at least 17” deep.

Beyond a depth of 8” measured from the leading edge, the 27” minimum high knee clearance can reduce 18” (to the 9” toe space) over a 3” span.

When the knee and toe depth exceeds the 17” minimum, the additional space must provide full knee clearance at least 27” high.