Final answer:
Interior egress doors must be self-closing and simple to open to ensure quick and safe evacuation during emergencies, conforming to codes such as the IBC.
Step-by-step explanation:
Interior stairway egress doors should typically be self-closing and require no special knowledge or effort to open in the direction of egress travel. This is to ensure the safety of the building occupants in case of an emergency, such as a fire, by preventing the spread of smoke and flames, and allowing for a quick and unhindered exit. The International Building Code (IBC) sets forth these and other requirements to ensure that egress doors do not compromise the safety of an evacuation.