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Section FC 2701: General
Section FC 2702: Definitions
Section FC 2703: General Safety Provisions
2703.1 Emergency control station.
2703.1.1 Location.
2703.1.2 Staffing.
2703.1.3 Signals.
2703.2 Devices, equipment and systems.
2703.2.1 Additional regulations for HPM supply piping and tubing.
2703.3 Design and installation requirements.
2703.3.1 Fabrication areas.
2703.3.2 Pass-throughs in exit access corridors.
2703.3.3 Liquid storage rooms.
2703.3.4 HPM rooms.
2703.3.5 Gas cabinets.
2703.3.6 Exhausted enclosures.
2703.3.7 Gas rooms.
2703.3.8 Service corridors.
2703.3.9 Cabinets containing pyrophoric liquids or water-reactive Class 3 liquids.
2703.4 Emergency plan.
2703.5 Maintenance of devices, equipment, systems and processes.
2703.6 Reserved.
2703.7 Electrical wiring and equipment.
2703.7.1 Fabrication areas.
2703.7.2 Workstations.
2703.7.3 Hazardous production material (HPM) rooms, gas rooms and liquid storage rooms.
2703.8 Reserved.
2703.9 Reserved.
2703.10 Sprinkler system.
2703.10.1 Workstations and tools.
2703.10.1.1 Combustible workstations.
2703.10.1.2 Combustible tools.
2703.10.2 Gas cabinets and exhausted enclosures.
2703.10.3 Pass-throughs in exit access corridors.
2703.10.4 Exhaust ducts for HPM.
2703.10.4.1 Metallic and noncombustible nonmetallic exhaust ducts.
2703.10.4.2 Combustible nonmetallic exhaust ducts.
2703.10.4.3 Exhaust connections and plenums of combustible workstations.
2703.10.4.4 Exhaust duct sprinkler system requirements.
2703.10.4.4.1 Sprinkler head locations.
2703.10.4.4.2 Control valve.
2703.10.4.4.3 Drainage.
2703.10.4.4.4 Corrosive atmospheres.
2703.10.4.4.5 Maintenance and inspection.
2703.10.5 Sprinkler alarms and supervision.
2703.11 Manual fire alarm system.
2703.12 Emergency alarm system.
2703.12.1 Where required.
2703.12.1.1 Service corridors.
2703.12.1.2 Exit access corridors and exit enclosures.
2703.12.1.3 Liquid storage rooms, HPM rooms and gas rooms.
2703.12.2 Alarm-initiating devices.
2703.12.3 Alarm signals.
2703.13 Continuous gas detection systems.
2703.14 Exhaust ventilation systems for HPM.
2703.14.1 Where required.
2703.14.2 Penetrations.
2703.14.3 Treatment systems.
2703.15 Emergency power system.
2703.15.1 Required electrical systems.
2703.16 Sub-atmospheric pressure gas systems.
Section FC 2704: Storage
Section FC 2705: Handling and Use
Chapter 28: Lumber Yards and Wood Waste Materials
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2703.10.4 Exhaust ducts for HPM.
A sprinkler system shall be provided in exhaust ducts conveying gases, vapors, fumes, mists or dusts generated from HPM in accordance with this section and the Mechanical Code and the Building Code.
2703.10.4.1 Metallic and noncombustible nonmetallic exhaust ducts.
A sprinkler system shall be provided in metallic and noncombustible nonmetallic exhaust ducts when the following conditions apply:
   1.   The largest cross-sectional diameter is equal to or greater than 10 inches (254 mm).
   2.   The ducts are within the building.
   3.   The ducts are conveying flammable gases, vapors or fumes.
2703.10.4.2 Combustible nonmetallic exhaust ducts.
A sprinkler system shall be provided in combustible nonmetallic exhaust ducts when the largest cross-sectional diameter of the duct is equal to or greater than 10 inches (254 mm).
   Exceptions:
      1.   Ducts listed or approved for applications without sprinkler system protection.
      2.   Ducts not more than 12 feet (3658 mm) in length installed below ceiling level.
2703.10.4.3 Exhaust connections and plenums of combustible workstations.
Fire extinguishing system protection for exhaust connections and plenums of combustible workstations shall comply with the requirements of FC 2703.10.1.1.
2703.10.4.4 Exhaust duct sprinkler system requirements.
Sprinkler systems installed in exhaust duct systems shall be hydraulically designed to provide 1/2 gallon per minute (gpm) (1.9 L/min) over an area derived by multiplying the distance between the sprinklers in a horizontal duct by the width of the duct. Minimum discharge shall be 20 gpm (76 L/min) per sprinkler from the five hydraulically most remote sprinklers.
2703.10.4.4.1 Sprinkler head locations.
Sprinkler heads shall be installed at 12-foot (3658 mm) intervals in horizontal ducts and at changes in direction. In vertical runs, sprinkler heads shall be installed at the top and at alternate floor levels.

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