The IRC stairs code states that, to comply with stairway requirements, the minimum width for residential stairs be no less than 36 inches. The stair riser code is up to 7.75 inches, and can not vary more than 3/8 of an inch.
What is the standard rise and run for interior stairs?
The OSHA standard for rise and run of stairs is maximum 9.5″ rise and minimum 9.5″ run (tread depth).
How do you find the code for stairs?
- Staircase width must be 36 inches minimum, not including handrails.
- The height of risers must not exceed 7 3/4 inches.
- The depth of each tread (run) must be a minimum of 10 to 11 Inches.
- The staircase must have a minimum headroom of 6 feet, 8 inches.
