711.4
711.4.1 Through penetrations.
Through penetrations of fire-resistance-rated horizontal assemblies shall comply with Section 711.4.1.1 or 711.4.1.2.
Exceptions:
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Penetrations by steel, ferrous or copper conduits, pipes, tubes, vents, concrete, or masonry through a single fire-resistance-rated floor assembly where the annular space is protected with materials that prevent the passage of flame and hot gases sufficient to ignite cotton waste where subjected to ASTM E 119 time temperature fire conditions under a minimum positive pressure differential of 0.01 inch (2.49 Pa) of water at the location of the penetration for the time period equivalent to the fire-resistance rating of the construction penetrated. Penetrating items with a maximum 6 inch (152 mm) nominal diameter shall not be limited to the penetration of a single fire-resistance-rated floor assembly provided that the area of the penetration does not exceed 144 square inches (92 900 mm2) in any 100 square feet (9.3 m2) of floor area.
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Penetrations in a single concrete floor by steel, ferrous or copper conduits, pipes, tubes and vents with a maximum 6 inch (152 mm) nominal diameter provided concrete, grout or mortar is installed the full thickness of the floor or the thickness required to maintain the fire-resistance rating. The penetrating items with a maximum 6 inch (152 mm) nominal diameter shall not be limited to the penetration of a single concrete floor provided that the area of the penetration does not exceed 144 square inches (0.0929 m2).
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Electrical outlet boxes of any material are permit- ted provided that such boxes are tested for use in fire-resistance-rated assemblies and installed in accordance with the tested assembly.
711.4.1.1 Fire-resistance-rated assemblies.
Penetrations shall be installed as tested in the approved fire-resistance-rated assembly.
711.4.1.2 Through-penetration firestop system.
Through penetrations shall be protected by an approved through-penetration firestop system installed and tested in accordance with ASTM E 814, with a minimum positive pressure differential of 0.01 inch (2.49 Pa) of water. The system shall have an F rating and a T rating of not less than 1 hour but not less than the required rating of the floor penetrated.
Exception: Floor penetrations contained and located within the cavity of a wall do not require a T rating.
711.4.2 Membrane penetrations.
Penetrations of membranes that are part of a fire-resistance-rated horizontal assembly shall comply with Section 711.4.1.1 or 711.4.1.2. Where floor/ceiling assemblies are required to have a minimum 1-hour fire-resistance rating, recessed fixtures shall be installed such that the required fire resistance will not be reduced.
Exceptions:
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Membrane penetrations by steel, ferrous or copper conduits, electrical outlet boxes, pipes, tubes, vents, concrete, or masonry penetrating items where the annular space is protected in accordance with Section 711.4.1 or is protected to prevent the free passage of flame and the products of combustion. Such penetrations shall not exceed an aggregate area of 100 square inches (64 500 mm2) in any 100 square feet (9.3 m2) of ceiling area in assemblies tested without penetrations.
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Membrane penetrations by listed electrical outlet boxes of any material are permitted provided such boxes have been tested for use in fire-resistance-rated assemblies and are installed in accordance with the instructions included in the listing.
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The annular space created by the penetration of a fire sprinkler provided it is covered by a metal escutcheon plate.
711.4.3 Nonfire-resistance-rated assemblies.
Penetrations of horizontal assemblies without a required fire-resistance rating shall meet the requirements of Section 707 or shall comply with Sections 711.4.3.1 through 711.4.3.2.
711.4.3.1 Noncombustible penetrating items.
Noncombustible penetrating items that connect not more than three stories are permitted provided that the annular space is filled with an approved noncombustible material to resist the free passage of flame and the products of combustion.
711.4.3.2 Penetrating items.
Penetrating items that connect not more than two stories are permitted provided that the annular space is filled with an approved material to resist the free passage of flame and the products of combustion.
711.4.4 Ducts and air transfer openings.
Penetrations of horizontal assemblies by ducts and air transfer openings that are not required to have dampers shall comply with this section. Ducts and air transfer openings that are protected with dampers shall comply with Section 715.
711.4.5 Dissimilar materials.
Noncombustible penetrating items shall not connect to combustible materials beyond the point of firestopping unless it can be demonstrated that the fire-resistance integrity of the horizontal assembly is maintained.
711.4.6 Floor fire doors.
Floor fire doors used to protect openings in fire-resistance-rated floors shall be tested in the horizontal position in accordance with ASTM E 119, and shall achieve a fire-resistance rating not less than the assembly being penetrated. Floor fire doors shall be labeled by an approved agency.
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