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2022 California Standards for Accessible Design Guide (effective January 1, 2023)

Note: This document or portion of document references a state or local code that is stricter than the 2010 ADA Standards requires.

11B-306.3 Knee clearance

11B-306.3.1 General.

Space under an element between 9 inches (229 mm) and 27 inches (686 mm) above the finish floor or ground shall be considered knee clearance and shall comply with Section 11B-306.3.

Exception: At lavatories required to be accessible by Section 11B-213.3.4, space between 9 inches (229 mm) and 29 inches (737 mm) above the finish floor or ground, shall be considered knee clearance.

11B-306.3.2 Maximum depth.

Knee clearance shall extend 25 inches (635 mm) maximum under an element at 9 inches (229 mm) above the finish floor or ground.

11B-306.3.3 Minimum required depth.

Where knee clearance is required under an element as part of a clear floor space, the knee clearance shall be 11 inches (279 mm) deep minimum at 9 inches (229 mm) above the finish floor or ground, and 8 inches (203 mm) deep minimum at 27 inches (686 mm) above the finish floor or ground.

Exceptions:

  1. At lavatories required to be accessible by Section 11B-213.3.4, the knee clearance shall be 27 inches (686 mm) high minimum above the finish floor or ground at a depth of 8 inches (203 mm) minimum increasing to 29 inches (737 mm) high minimum above the finish floor or ground at the front edge of a counter with a built-in lavatory or at the front edge of a wall-mounted lavatory fixture.
  2. At dining and work surfaces required to be accessible by Section 11B-226.1, knee clearance shall extend 19 inches (483 mm) deep minimum at 27 inches (686 mm) above the finish floor or ground.

11B-306.3.4 Clearance reduction.

Between 9 inches (229 mm) and 27 inches (686 mm) above the finish floor or ground, the knee clearance shall be permitted to reduce at a rate of 1 inch (25 mm) in depth for each 6 inches (152 mm) in height.

Exception: The knee clearance shall not be reduced at built-in dining and work surfaces required to be accessible by Section 11B-226.1.

11B-306.3.5 Width.

Knee clearance shall be 30 inches (762 mm) wide minimum.

Figure 306.3(a) Knee Clearance: Elevation. Knee clearance is 27 inches high minimum above the floor or ground for a minimum depth of 8 inches, measured from the leading edge of the element. The vertical clearance decreases beyond this depth to a height of 9 inches minimum at depth of 11 inches minimum measured from the leading edge of the element. Figure 306.3(b) Knee Clearance: Plan. Combined knee and toe clearance can extend 25 inches maximum under an element. Figure 306.3(c) Knee Clearance Elevation at Lavatory: knee clearance is 29 " high minimum above floor at the front edge of the lavatory, 27" high minimum above the floor for a minimum depth of 8 inches, measured from the leading edge of the lavatory. The vertical clearance decreases beyond this depth to a height of 9 inches minimum at a depth of 11 inches minimum measured from the leading edge of the element.

(a) elevation

Figure 306.3(a) Knee Clearance: Elevation. Knee clearance is 27 inches high minimum above the floor or ground for a minimum depth of 8 inches, measured from the leading edge of the element. The vertical clearance decreases beyond this depth to a height of 9 inches minimum at depth of 11 inches minimum measured from the leading edge of the element. Figure 306.3(b) Knee Clearance: Plan. Combined knee and toe clearance can extend 25 inches maximum under an element. Figure 306.3(c) Knee Clearance Elevation at Lavatory: knee clearance is 29 " high minimum above floor at the front edge of the lavatory, 27" high minimum above the floor for a minimum depth of 8 inches, measured from the leading edge of the lavatory. The vertical clearance decreases beyond this depth to a height of 9 inches minimum at a depth of 11 inches minimum measured from the leading edge of the element.

(b) plan

Figure 306.3(a) Knee Clearance: Elevation. Knee clearance is 27 inches high minimum above the floor or ground for a minimum depth of 8 inches, measured from the leading edge of the element. The vertical clearance decreases beyond this depth to a height of 9 inches minimum at depth of 11 inches minimum measured from the leading edge of the element. Figure 306.3(b) Knee Clearance: Plan. Combined knee and toe clearance can extend 25 inches maximum under an element. Figure 306.3(c) Knee Clearance Elevation at Lavatory: knee clearance is 29 " high minimum above floor at the front edge of the lavatory, 27" high minimum above the floor for a minimum depth of 8 inches, measured from the leading edge of the lavatory. The vertical clearance decreases beyond this depth to a height of 9 inches minimum at a depth of 11 inches minimum measured from the leading edge of the element.

(c) elevation @ lavatory

FIGURE 11B-306.3 KNEE CLEARANCE ‡‡

Source: 2022 California Standards for Accessible Design Guide (effective January 1, 2023) by DSA Advisory Manual - published 07/01/2022

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