Am I right? The IRC has no minimum rise height for stairways???

[cevans (Chuck Evans, CMI)]

@gil_phillips

I have a question about the size of the tread. What is the minimum size of the actual tread. The spec that I have read says that the tread depth is 11", but that is measured from tread to tread. Not the actual tread. So if the minimum tread depth is 11", can the actual tread be 10 3/4" as long as the depth from tread to tread stays at a minimum of 11". This is for IBC and UBC stairs. Thank you.

Measured from nose to nose. All tread depths must be consistent to 3/8 inch or less in a flight of stairs.