Below are excerpts of the code describing means of egress.
1009.1 Stairway Width
1009.2 Headroom
1009.3 Stair Treads & Risers
1009.3.1 Dimensional Uniformity
1009.3.2 Profile
1009.4 Stairway Landings
1009.6 Verical Rise
1009.11 Handrails
1009.11.3 Handrail Graspability
1009.11.4 Continuity
1009.11.5 Handrail Extensions
1009.11.6 Clearance
1013.3 Exit Access
1014.1 Table: Spaces with one Means of Egress
1014.5 Refrigerated Rooms and Spaces
1016.1 Table: Corridor Fire Resistance Ratings