415.11.1.6 Ventilation.

Mechanical exhaust ventilation at the rate of not less than 1 cubic foot per minute per square foot (0.0051 m 3 /(s · m 2 )) of floor area shall be provided throughout portions of the fabrication area where HPM are used or stored. The exhaust air duct system of one fabrication area shall not connect to another duct system outside that fabrication area within the building.

A ventilation system shall be provided to capture and exhaust fumes and vapors at workstations.

Two or more operations at a workstation shall not be connected to the same exhaust system where either one or the combination of the substances removed could constitute a fire, explosion or hazardous chemical reaction within the exhaust duct system.

Exhaust ducts penetrating fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711 shall be contained in a shaft of equivalent fire-resistance-rated construction. Exhaust ducts shall not penetrate fire walls.

Fire dampers shall not be installed in exhaust ducts.

415.11.1.7 Transporting hazardous production materials to fabrication areas.

HPM shall be transported to fabrication areas through enclosed piping or tubing systems that comply with Section 415.11.6, through service corridors complying with Section 415.11.3, or in exit access corridors as permitted in the exception to Section 415.11.2. The handling or transporting of HPM within service corridors shall comply with the New York City Fire Code.

415.11.1.8 Electrical.

Electrical equipment and devices within the fabrication area shall comply with the New York City Electrical Code. The requirements for hazardous locations need not be applied where the average air change is at least four times that set forth in Section 415.11.1.6 and where the number of air changes at any location is not less than three times that required by Section 415.11.1.6. The use of recirculated air shall be permitted.

415.11.1.8.1 Workstations.

Workstations shall not be energized without adequate exhaust ventilation. See Section 415.11.1.6 for workstation exhaust ventilation requirements.

415.11.2 Corridors.

Corridors shall comply with Chapter 10 and shall be separated from fabrication areas as specified in Section 415.11.1.2. Corridors shall not contain HPM and shall not be used for transporting such materials except through closed piping systems as provided in Section 415.11.6.

   Exception: Where existing fabrication areas are altered or modified, HPM is allowed to be transported in existing corridors, subject to the following conditions:

      1.   Nonproduction HPM is allowed to be transported in corridors if utilized for maintenance, lab work and testing.

      2.   Corridors. Corridors adjacent to the fabrication area where the alteration work is to be done shall comply with Section 1020 for a length determined as follows:

         2.1.   The length of the common wall of the corridor and the fabrication area; and

         2.2.   For the distance along the corridor to the point of entry of HPM into the corridor serving that fabrication area.

      3.   Emergency alarm system. There shall be an emergency telephone system, a local manual alarm station or other approved alarm-initiating device within corridors at not more than 150-foot (45 720 mm) intervals and at each exit and doorway. The signal shall be relayed to an approved central, proprietary or remote station service or the emergency control station and shall also initiate a local audible alarm.

      4.   Pass-throughs. Self-closing doors having a fire-protection rating of not less than 1 hour shall separate pass-throughs from existing corridors. Pass-throughs shall be constructed as required for the corridors, and protected by an approved automatic fire-extinguishing system.