1011.8 Vertical rise.
BC § 1011.8
A flight of stairs shall not have a vertical rise greater than 12 feet (3657.6 mm) between floor levels or landings. Exceptions: 1. Aisle stairs complying with Section 1029.
2.Alternating tread devices complying with Section 1011.14.
3.Spiral stairways used as a means of egress from technical production areas.













