OSHA 1910.25(c)(2) requires standard stairs to have a maximum riser height of 9.5 inches (24 cm). IBC 1011.5. 2 requires that stair riser heights shall be 7 inches (178 mm) maximum and4 inches (102 mm) minimum.
The building code does not refer to the number of “steps” but it does require a handrail when there are two or more “risers”. For clarification, a “riser” is the vertical portion of a stair. ... The handrail must be between 1-1/4″ and 2″ in diameter or provide equivalent ...
For my staircase I’m trying to have a maximum rise between 7.5 and 7.75 inches and a run of 10 inches. I measured the distance from the concrete floor up to the finished floor of my workshop to get the total rise required. In my case the total height was 129.625 inches. Therefore I...