Section 11B — 504 — STAIRWAYS — 2025 California Building Code (Title 24, Part 2)

11B- 504.1 General. Stairs shall comply with Section 11B- 504 . 11B- 504.2 Treads and risers. All steps on a flight of stairs shall have uniform riser heights and uniform tread depths. Risers shall be 4 inches ( 102 mm) high minimum and 7 inches ( 178 mm) high maximum. Treads shall be 11 inches ( 279 mm) deep minimum. Exception: Curved stairways with winder treads are permitted at stairs which are not part of a required means of egress. 11B- 504.3 Open risers. Open risers are not permitted. Exceptions: 1. On exterior stairways, an opening of not more than [1] / 2 inch (12.7 mm) may be…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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