Approved exit components must meet capacity
requirements that are stated according to the number of persons per unit of exit. These
capacity requirements are:
- Level Egress Components (including Class A ramps): 100 persons/unit
- Inclined Egress Components (including Class B ramps): 60 persons/unit.
Means of egress ramps are classified as A and B:
- The Class A ramp has a slope no greater than 1 3/16 inches in a 12-inch length, a width
of at least 44 inches, and no limit on the maximum height between landings.
- The Class B ramp has a slope of 1 3/16 to 2 inches in a 12-inch length, a width of 30 to
44 inches, and a maximum height between landings of 12 feet.