SECTION 712 PENETRATIONS
712.1 Scope. The provisions
of this section shall govern the materials and methods of
construction used to protect through penetrations and membrane
penetrations of horizontal assemblies and fire-resistance-rated
wall assemblies.
712.2
Installation details. Where sleeves are used, they shall
be securely fastened to the assembly penetrated. The space
between the item contained in the sleeve and the sleeve itself
and any space between the sleeve and the assembly penetrated
shall be protected in accordance with this section. Insulation
and coverings on or in the penetrating item shall not penetrate
the assembly unless the specific material used has been tested
as part of the assembly in accordance with this section.
712.3
Fire-resistance-rated walls. Penetrations into or through
fire walls, fire-barrier walls, smoke-barrier walls and I
fire partitions shall comply with Sections 712.3.1 through
712.3.4.
712.3.1
Through penetrations. Through penetrations of fire-resistance-rated
walls shall comply with Section 712.3.1.1 or 712.3.1.2.
Exception:
Where the penetrating items are steel, ferrous or copper pipes,
tubes or conduits, the annular space between the penetrating
item and the fire-resistance-rated wall is permitted to be
protected as follows:
1. In
concrete or masonry walls where the penetrating item
is a maximum 6-inch (152 mm) nominal diameter and the
area of the opening through the I wall does not exceed
144 square inches (0.0929 m2), concrete,
grout or mortar is permitted where it is installed the
full thickness of the wall or the thickness required
to maintain the fire-resistance rating; or
2. The
material used to fill the annular space shall prevent
the passage of flame and hot gases sufficient to ignite
cotton waste when 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.
712.3.1.1
Fire-resistance-rated assemblies. Penetrations shall
be installed as tested in an approved fire-resistance-rated
assembly.
712.3.1.2
Through-penetration fire stop system. Through penetrations
shall be protected by an approved penetration fire stop
system installed as tested in accordance with ASTM E
814 or UL 1479, with a minimum positive pressure differential
of 0.01 inch (2.49 Pa) of water and shall have an F rating
of not less than the required fire-resistance rating of
the wall penetrated.
712.3.2
Membrane penetrations. Membrane penetrations shall comply
with Section 712.3.1. Where walls or partitions are required
to have a fire-resistance rating, recessed fixtures shall
be installed such that the required fire resistance will
not be reduced.
Exceptions:
1.
Membrane penetrations of maximum two-hour fire-resistance-rated
walls and partitions by steel electrical boxes that do not
exceed 16 square inches (0.0103 m2) in area,
provided the aggregate area of the openings through the
membrane does not exceed 100 square inches (0.0645 m2)
in any 100 square feet (9.29 m2) of wall area.
The annular space between the wall membrane and the box
shall not exceed 1/8 inch (3.1 mm).
Such boxes on opposite sides of the wall or partition shall
be separated by one of the following:
1.1. By a horizontal distance
of not less than 24 inches (610 mm);
1.2. By a horizontal distance
of not less than the depth of the wall cavity where
the wall cavity is filled with cellulose loose-fill,
rock wool or slag mineral wool insulation;
1.3. By solid fire blocking
in accordance with Section 717.2.1;
1.4. By protecting both
outlet boxes with listed putty pads; or
1.5. By other listed materials
and methods.
2.
Membrane penetrations by listed electrical boxes of any
material, 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. The annular
space between the wall membrane and the box shall not exceed
1/8 inch (3.1 mm) unless listed otherwise.
Such boxes on opposite sides of the wall or partition shall
be separated as follows:
2.1.
By a horizontal distance of not less than 24 inches
(610 mm);
2.2.
By solid fire blocking in accordance with Section
717.2.1;
2.3. By protecting both
boxes with listed putty pads; or
2.4. By other listed materials
and methods.
3.
The annular space created by the penetration of a fire sprinkler,
provided it is covered by a metal escutcheon plate.
712.3.3
Ducts and air transfer openings. Penetrations of fire-resistance-rated
walls by ducts that are not protected I with dampers shall
comply with Sections 712.2 through 712.3.1. Ducts and air
transfer openings that are protected with dampers shall
comply with Section 716.
712.3.4
Dissimilar materials. Noncombustible penetrating items
shall not connect to combustible items beyond the point
of fires topping unless it can be demonstrated that the
fire-resistance integrity of the wall is maintained.
712.4
Horizontal assemblies. Penetrations of a floor, floor/ceiling
assembly or the ceiling membrane of a roof/ceiling assembly
shall be protected in accordance with Section
707.
712.4.1
Fire-resistance rated assemblies. Penetrations of
the fire-resistance rated floor, floor/ceiling assembly
or the ceiling membrane of a roof/ceiling assembly shall
comply with Sections 712.4.1.1 through 714.4.1.5
712.4.1.1 Through penetrations. Through penetrations
of fire-resistance-rated horizontal assemblies shall comply
with Section 712.4.1.1.1 or 712.4.1.1.2.
Exceptions:
1. Penetrations
by steel, ferrous or copper conduits, pipes, tubes or vents
or concrete or I masonry items 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 when 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 the aggregate
area of the openings through the assembly does not exceed
144 square inches (92 900 mm2) in any 100 square
feet (9.3 m2) of floor area.
2. Penetrations
in a single concrete floor by steel, ferrous or copper conduits,
pipes, tubes or vents with a maximum 6-inch (152 mm) nominal
diameter, provided the 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 shall not be limited to the penetration of a single
concrete floor, provided the area of the opening through
each floor does not exceed 144 square inches (92 900 mm2).
3.
Penetrations by listed electrical boxes of any material,
provided such boxes have been tested for use in fire-resistance-rated
assemblies and installed in accordance with the instructions
included in the listing.
712.4.1.1.1
Installation. Through penetrations shall be installed
as tested in the approved fire-resistance-rated assembly.
712.4.1.1.2
Through-penetration fire stop system. Through penetrations
shall be protected by an approved through-penetration
fire stop system installed and tested in accordance
with ASTM E 814 or UL 1479, with a minimum positive
pressure differential of 0.01 inch of water (2.49 Pa).
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.
712.4.1.2 Membrane penetrations.
Penetrations of membranes that are part of a fire resistance
rated horizontal assembly shall comply with Section 712.4.1.1.1
or 712.4.1.1.2. 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:
1. Membrane
penetrations of maximum 2-hour fire-resistance-rated
walls and partitions by steel, ferrous or copper conduits,
pipes, tubes or vents, or concrete or masonry items
where the annular space is protected either in accordance
with Section 712.4.1.1 or to prevent the free passage
of flame and the products of combustion. The aggregate
area of the openings through the membrane shall not
exceed 100 square inches (64 500 mm2) in
any 100 square feet (9.3 m2) of ceiling area
in assemblies tested without penetrations.
2. Ceiling
membrane penetrations of maximum 2-hour fire-resistance-rated
horizontal assemblies by steel electrical boxes that
do not exceed 16 square inches (l0 323 mm2)
in area, provided the aggregate area of such penetrations
does not exceed 100 square inches (44 500 mm2)
in any 100 square feet (9.29 m2) of ceiling
area, and the annular space between the ceiling membrane
and the box does not exceed 1/8
inch (3.12 mm).
3. Membrane
penetrations by listed electrical boxes of any material,
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. The annular space
between the ceiling membrane and the box shall not exceed
1/8 inch (3.1 mm) unless listed
otherwise.
4. The
annular space created by the penetration of a fire sprinkler,
provided it is covered by a metal escutcheon plate.
712.4.1.3 Ducts and air
transfer openings. penetrations of horizontal assemblies
by ducts and air transfer openings shall comply with Section
716.
712.4.1.4 Dissimilar materials. Noncombustible
penetrating items shall not connect to combustible materials
beyond the point of fire stopping unless it can be demonstrated
that the fire-resistance integrity of the horizontal assembly
is maintained.
712.4.1.5 Floor fire doors. Floor fire doors used
to protect openings in fire-resistance-rated floors shall
be tested in accordance with NFPA 288, and shall achieve
a fire-resistance rating not less than the assembly
being penetrated. Floor fire doors shall be labeled by
an approved agency.
712.4.2 Non fire-resistance-rated
assemblies. Penetrations of horizontal assemblies without
a required fire-resistance rating shall meet the requirements
of Section 707 or shall comply with
Section 712.4.2.1 or 712.4.2.2.
712.4.2.1 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.
712.4.2.2 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.
712.4.3 Ducts and air transfer
openings. Penetrations of horizontal assemblies by ducts
that are not protected with dampers shall comply with Section
712.2 and Sections 712.4 through 712.4.2.2. Ducts and air
transfer openings that are protected with dampers shall
comply with Section 716.
712.4.4 Dissimilar materials.
Noncombustible penetrating items shall not connect to combustible
materials beyond the point of fires topping unless it can
be demonstrated that the fire-resistance integrity of the
horizontal assembly is maintained.
712.5 Penetrations in smoke
barriers. Penetrations in smoke barriers shall be tested
in accordance with the requirements of UL 1479 for air leakage.
The air leakage rate of the penetration assembly shall not
exceed 5.0 cfm per square foot (0.025 m3 / s m2)
of penetration opening at 0.30 inch ( 7.47 Pa) of water for
both the ambient temperature and elevated temperature tests.
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