| The maximum angle a
stairway riser can slope is 30 degrees.
To give you an idea just how much 30° is for a stairway riser, a 1 inch
undercut on a 7 1/2 inch riser is about 10°. You would almost need to
cut a 3 inch undercut to get 30°.
There is a good chance that most stair builders will never reach the
maximum angle for stair risers.
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information could be incorrect or outdated.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.
Maximum Rise
Maximum Total Stairway Rise
Closed Stairway Riser Options
Maximum Variation in Stair Risers
Stair Tread Minimum
Stair
Tread Nosing Requirements
Floor and
Landing Overhang
Closed Treads and Open Risers
What's an Open Riser
Staircase?
Problems with Open Risers Stairways
Minimum Stair Clearance
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