The maximum stair riser can't be larger than 7 inches or
smaller than 4 inches.
However, there are a couple of exceptions most single-family homes can
have a maximum of 8 inches, with the exception of some newer building
codes. It gets a bit
confusing, but for the most part I would suggest a maximum riser height
of 7 3/4", if possible, just to be safe.
Now where does the 7 inch maximum riser height come into play. This
building code applies to most residential buildings with more than 50
occupants. Most building codes clearly state that an 8 inch maximum
riser (except for the 2010 California building code, requiring a 7 3/4"
maximum riser) is acceptable for buildings with less than 49 occupants.
If you're planning on building any stairs that aren't going to be for a
private residence with less than 49 occupants, plan on using risers
between 4 and 7 inches in height.
Attention: Don't forget to check with your local
building department to verify any building codes on this website. This
information could be incorrect or outdated. Building codes are updated
regularly and to some building departments have different
interpretations for certain building codes.
Exterior Stairways - 3
Stories or More
Equipment Access
Stairs
Minimum Stairway
Width
Maximum
Handrail Projection
Skirt
Boards and Decorative Trim
Sloping Public
Walkways
One Inch per Foot
Slope
Painted
Stairway Warning Stripe
Private
Walkway Riser Problem
Concrete
Stair Step Warning Lines
Stair Landing
Minimum Widths
Stair
Landing Width and Doors |
