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2016 California Standards for Accessible Design Pocket Guide - Eff. Jan. 1, 2017

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.

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

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, 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.

Source: 2016 California Standards for Accessible Design Pocket Guide - Eff. Jan. 1, 2017 by California Building Standards Commission (edited by Evan Terry Associates) - published 07/01/2016

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