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Every door assembly in a stair enclosure serving more than four stories, unless permitted by 7.2.1.5.7.2, shall meet one of the following conditions:
  1. Re-entry from the stair enclosure to the interior of the building shall be provided.
  2. An automatic release shall be provided that meets all of the following:
    1. The automatic release shall unlock all stair enclosure door assemblies to allow re-entry.
    2. The automatic release shall be actuated with the initiation of the building fire alarm system.
    3. Door hardware for new installations shall be listed in accordance with UL 294, Access Control System Units.
  3. Selected re-entry shall be provided in accordance with 7.2.1.5.7.1.
7.2.1.5.7.1
Door assemblies on stair enclosures shall be permitted to be equipped with hardware that prevents re-entry into the interior of the building, provided that all of the following criteria are met:
  1. There shall be not less than two levels where it is possible to leave the stair enclosure to access another exit.
  2. There shall be not more than four stories intervening between stories where it is possible to leave the stair enclosure to access another exit.
  3. Re-entry shall be possible on the top story or next-to-top story served by the stair enclosure, and such story shall allow access to another exit.
  4. Door assemblies allowing re-entry shall be identified as such on the stair side of the door leaf.
  5. Door assemblies not allowing re-entry shall be provided with a sign on the stair side indicating the location of the nearest door opening, in each direction of travel, that allows re-entry or exit.
7.2.1.5.7.2
The requirements of 7.2.1.5.7, except as provided in 7.2.1.5.7.3, shall not apply to the following:
  1. Existing installations in buildings that are not high-rise buildings as permitted in Chapters 11 through 43
  2. Existing installations in high-rise buildings as permitted in Chapters 11 through 43 where the occupancy is within a building protected throughout by an approved, supervised automatic sprinkler system in accordance with Section 9.7
  3. Existing approved stairwell re-entry installations as permitted by Chapters 11 through 43
  4. Stair enclosures serving a building permitted to have a single exit in accordance with Chapters 11 through 43
  5. Stair enclosures in health care occupancies where otherwise provided in Chapter 18
  6. Stair enclosures in detention and correctional occupancies where otherwise provided in Chapter 22
7.2.1.5.7.3
When the provisions of 7.2.1.5.7.2 are used, signage on the stair door leaves shall be required as follows:
  1. Door assemblies allowing re-entry shall be identified as such on the stair side of the door leaf.
  2. Door assemblies not allowing re-entry shall be provided with a sign on the stair side indicating the location of the nearest door opening, in each direction of travel, that allows re-entry or exit.

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