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Where stairways and stepped aisles are in a straight run, transitions shall have one of the following:
  1. A depth of not less than 22 inches (559 mm) where the treads on the descending side of the transition have greater depth.
  2. A depth of not less than 30 inches (762 mm) where the treads on the descending side of the transition have lesser depth.

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Section 1030 Means of Egress, Assembly
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1030.9.7 Means of Egress, Stairways Connecting to Stepped Aisles
A stairway that connects a stepped aisle to a cross aisle or concourse shall be permitted to comply with the assembly aisle walking surface ...