Using BCNYS 2010 which is based on IBC 2006. I have a project with a floor to floor height of 17'-0" I designed a stair with 30 risers at 6.8" each & a landing at 11'-4" AFF. Another licensed architect in my office is telling me that I should be looking at designing it with 29 risers at 7.03". His reasoning is that OSHA only recognizes 7" as a riser height (no more, no less, exactly 7") & that there is a construction tolerance section of the code that would permit me to exceed the maximum allowable riser height explicitly stated in code.
I have only been licensed for 12+ years so I want to make sure I am not missing something. Thanks.
I have only been licensed for 12+ years so I want to make sure I am not missing something. Thanks.