2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)
11B-405.7.2.1.
Top landings shall be 60 inches (1524 mm) wide minimum.
Advisory 11B-405.7.2.1 Top landing width. Handrail extensions are not permitted to obstruct required clear landing dimensions except as allowed by the exception to Section 11B-307.2. Where the ramp width is less than the top landing width additional landing length may be necessary to accommodate handrail extensions required to be in the direction of the ramp run without diminishing the required clear landing length. Additional landing length may be provided across the entire landing width or as a level extension at the top of the ramp run. ◼
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