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SEC. 57.4705.1.2. VESTIBULE OPENINGS.
 
   All vestibule openings other than those for elevator doors and stairway enclosures shall be protected with automatic-closing fire assemblies having not less than a 45-minute fire-resistive rating, actuated by “combustion products” type smoke detectors.
 
 
SEC. 57.4705.1.3. SMOKE DETECTOR.
 
   Each elevator vestibule shall be provided with an approved smoke detector located on the lobby ceiling. The elevator controls shall be designed so that the activation of a lobby smoke detector will cause all elevators serving that landing or floor to return non-stop to the designated main floor and be under manual control only.
 
 
SEC. 57.4705.1.3.1. ALTERNATE FLOOR RECALL.
 
   Elevators with an alternate floor recall feature shall also have an approved smoke detector in the designated main floor elevator lobby. Activation of this smoke detector would recall the elevator to an alternate floor designated by the Chief.
 
 
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