Penetrations into or through fire walls,
fire barriers, smoke barrier walls and
fire partitions shall comply with Sections 713.3.1 through
713.3.3. Penetrations in smoke barrier walls shall also comply
with Section 713.5.
713.3.1
Through penetrations. Through penetrations of fire-resistance-rated
walls shall comply with Section 713.3.1.1 or 713.3.1.2.
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 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 or UL 263
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.
713.3.1.1
Fire-resistance-rated assemblies. Penetrations shall be installed as
tested in an approved fire-resistance-rated
assembly.
713.3.1.2
Through-penetration firestop system.
Through
penetrations shall be protected by an approved
penetration firestop 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.
713.3.2
Membrane penetrations.
Membrane penetrations shall comply with Section 713.3.1. 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 2-hour
fire-resistance-rated walls and partitions by steel electrical boxes that do
not exceed 16 square inches (0.0103 m
2) in area,
provided the aggregate area of the openings through the membrane does not
exceed 100 square inches (0.0645 m
2) in any 100
square feet (9.29 m
2) 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) where the wall or partition is
constructed with individual noncommunicating stud cavities;
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, rockwool or slag mineral wool insulation;
1.3. By solid fireblocking 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 by one of the following:
2.1. By the horizontal distance specified in
the listing of the electrical boxes;
2.2. By solid fireblocking 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.
Membrane penetrations by electrical boxes of any size or type, which have been
listed as part of a wall opening protective material system
for use in fire-resistance-rated assemblies and are installed in accordance
with the instructions included in the listing.
4. Membrane penetrations by boxes other than
electrical boxes, provided such penetrating items and the annular
space between the wall membrane and the box, are protected by an
approved
membrane penetration firestop 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 and T rating of not less than the required fire-resistance
rating of the wall penetrated and be installed in accordance with
their listing.
5. The
annular space created by the penetration of an automatic
sprinkler, provided it is covered by a metal escutcheon plate.
713.3.3
Dissimilar
materials. Noncombustible penetrating items shall not connect to
combustible items beyond the point of firestopping unless it can be
demonstrated that the fire-resistance integrity of the wall is
maintained.