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Title 28: New York City Construction Codes
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§ 28-701.1 Update.
§ 28-701.2 Enactment of the New York City Building Code.
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Chapter 2: Definitions
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Section BC 701: General
Section BC 702: Definitions
Section BC 703: Fire-Resistance Ratings and Fire Tests
Section BC 704: Fire-Resistance Rating of Structural Members
Section BC 705: Exterior Walls
Section BC 706: Fire Walls
Section BC 707: Fire Barriers
707.1 General.
707.2 Materials.
707.3 Fire-resistance rating.
707.3.1 Shaft enclosures.
707.3.2 Interior exit stairway and ramp construction.
707.3.3 Enclosures for exit access stairways.
707.3.4 Exit passageway.
707.3.5 Horizontal exit.
707.3.6 Atriums.
707.3.7 Incidental uses.
707.3.8 Control areas.
707.3.9 Separated occupancies.
707.3.10 Fire areas.
707.3.11 Public corridors.
707.4 Exterior walls.
707.5 Continuity.
707.5.1 Supporting construction.
707.6 Openings.
707.7 Penetrations.
707.7.1 Prohibited penetrations.
707.8 Joints.
707.9 Voids at intersections.
707.10 Ducts and air transfer openings.
707.10.1 Prohibited ducts and air transfer openings.
Section BC 708: Fire Partitions
Section BC 709: Smoke Barriers
Section BC 710: Smoke Partitions
Section BC 711: Horizontal Assemblies
Section BC 712: Vertical Openings
Section BC 713: Shaft Enclosures
Section BC 714: Penetrations
Section BC 715: Fire-Resistant Joint Systems
Section BC 716: Opening Protectives
Section BC 717: Ducts and Air Transfer Openings
Section BC 718: Concealed Spaces
Section BC 719: Fire-Resistance Requirements for Plaster
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Section BC 722: Calculated Fire Resistance
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706.11 Ducts and air transfer openings.
Ducts and air transfer openings shall not penetrate fire walls.
   Exception: Penetrations by ducts and air transfer openings of fire walls that are not on a lot line shall be allowed provided the penetrations comply with Section 717. The size and aggregate width of all openings shall not exceed the limitations of Section 706.8.
Section BC 707: Fire Barriers
707.1 General.
Fire barriers installed as required elsewhere in this code or the New York City Fire Code, shall comply with this section.
707.2 Materials.
Fire barriers shall be of materials permitted by the building type of construction.

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