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- California Code of Regulations, Title 8, Section 1626. Stairwells and . . .
(3) Riser height and tread depth shall be uniform within each flight of stairs, including any foundation structure used as one or more treads of the stairs Variations in riser height or tread depth shall not be over 1 4-inch (0 6 cm) on any stairway
- B-09 2020-Current: Code Requirements for Residential Stairs
Winders shall have a tread depth of 10 inches at the walk line and a minimum tread depth of 6 inches Spiral stairs shall have a minimum tread depth of 7 5 inches at the walk line, a riser height maximum of 9 5 inches, a minimum width of 26 inches, and a headroom clearance of 78 inches
- 2019 California Building Code, Title 24, Part 2 (Volumes 1 2) with . . .
1011 5 2 Riser height and tread depth Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum The riser height shall be measured vertically between the nosings of adjacent treads
- Residential Stair Codes | Rise, Run, Handrails Explained
As for stair treads, Section R311 7 5 2 of the code specifies that the depth must not be less than 10 inches however this will require nosing projections To avoid having to install nosing the code requires the depth of the tread to be no less than 11 inches
- STAIRS, HANDRAILS AND GUARDS - Chico
The maximum riser height in any stair may not exceed 7 3⁄4 inches measured from the top of one tread to the top of any adjacent tread The minimum tread depth shall be 10 inches measured from the nosing of one tread to the nosing of any adjacent tread
- 11B-504 Stairways - Corada
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
- California Code of Regulations, Title 8, Section 3231. Stairways.
The largest tread run within any flight of stairs shall not exceed the smallest by more than 3 8 inch The greatest riser height within any flight of stairs shall not exceed the smallest by more than 3 8 inch
- Stairways | CRC § R311. 7 | Humboldt County, CA - Official Website
These codes cover a variety of topics, from the minimum required width and maximum allowed riser height of stairways, to the specifications for tread depth and nosing projection, and even to the requirements for both interior and exterior illumination of the stairways for safety
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