![]() A step is permitted in aislesserving seating that has a difference in elevation less than 12 inches (305 mm) at locations not required to be accessible by Chapter 11, provided that the risers and treads comply with Section 1029.13 and the aisleis provided with a handrailcomplying with Section 1029.15.A stairwith a single riser or with two risers and a tread is permitted at locations not required to be accessible by Chapter 11 where the risers and treads comply with Section 1011.5, the minimum depth of the tread is 13 inches (330 mm) and not less than one handrailcomplying with Section 1014 is provided within 30 inches (762 mm) of the centerline of the normal path of egress travel on the stair.A single step with a maximum riser height of 7 inches (178 mm) is permitted for buildings with occupancies in Groups F, H, R-2, R-3, S and U at exterior doors not required to be accessible by Chapter 11. ![]()
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