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Interior stairway means of egress doors shall be openable from both sides without the use of a key or special knowledge or effort.
Exceptions:
  1. Stairway discharge doors shall be openable from the egress side and shall only be locked from the opposite side.
  2. This section shall not apply to doors arranged in accordance with Section 403.5.3.
  3. Stairway exit doors are permitted to be locked from the side opposite the egress side, provided that they are openable from the egress side and capable of being unlocked simultaneously without unlatching upon a signal from the fire command center, if present, or a signal by emergency personnel from a single location inside the main entrance to the building.
  4. Stairway exit doors shall be openable from the egress side and shall only be locked from the opposite side in Group B, F, M and S occupancies where the only interior access to the tenant space is from a single exit stairway where permitted in Section 1006.3.4.
  5. Stairway exit doors shall be openable from the egress side and shall only be locked from the opposite side in Group R-2 occupancies where the only interior access to the dwelling unit is from a single exit stairway where permitted in Section 1006.3.4.

Related Code Sections

1010.1.9.12 Means of Egress, Stairway Doors
Interior stairway means of egress doors shall be openable from both sides without the use of a key or special knowledge or effort. Exceptions ...
1010.2.7 Means of Egress, Stairway Doors
Interior stairway means of egress doors shall be openable from both sides without the use of a key or special knowledge or effort. Exceptions ...