2025 California Standards for Accessible Design Guide (effective January 1, 2026)
11B-809.8.1 Door Thresholds.
Primary entry doors, required exit doors, and interior doors intended for user passage shall have thresholds complying with Section 11B-404.2.5. Secondary exterior door thresholds, including sliding door tracks, shall be 3/4 inch (19.1 mm) high maximum with a 1:2 maximum slope.
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