International Building Code Section 1405


International Building Code 1405.1

General. Exterior wall coverings shall be designed and
constructed in accordance with the applicable provisions of
this section.

International Building Code 1405.10

Metal veneers. Veneers of metal shall be fabricated
from approved corrosion-resistant materials or shall be protected
front and back with porcelain enamel, or otherwise be
treated to render the metal resistant to corrosion. Such veneers
shall not be less than 0.0149-inch (0.378 mm) nominal thickness
sheet steel mounted on wood or metal furring strips or
approved sheathing on the wood construction.

Attachment. Exterior metal veneer shall be
securely attached to the supporting masonry or framing
members with corrosion-resistant fastenings, metal ties or
by other approved devices or methods. The spacing of the
fastenings or ties shall not exceed 24 inches (610 mm) either
vertically or horizontally, but where units exceed 4 square
feet (0.4 m2) in area there shall be not less than four attachments
per unit. The metal attachments shall have a
cross-sectional area not less than provided by W 1.7 wire.
Such attachments and their supports shall be capable of
resisting a horizontal force in accordance with the wind
loads specified in Section 1609, but in no case less than 20
psf (0.958 kg/m2).

Weather protection. Metal supports for exterior
metal veneer shall be protected by painting, galvanizing or
by other equivalent coating or treatment. Wood studs, furring
strips or other wood supports for exterior metal veneer
shall be approved pressure-treated wood or protected as
required in Section 1403.2. Joints and edges exposed to the
weather shall be caulked with approved durablewaterproofing
material or by other approved means to prevent penetration
of moisture.

Backup. Masonry backup shall not be required
for metal veneer except as is necessary to meet the fire-resistance
requirements of this code.

Grounding. Grounding of metal veneers on
buildings shall comply with the requirements of Chapter 27
of this code or the ICC Electrical Code.

International Building Code 1405.10.1

Attachment. Exterior metal veneer shall be
securely attached to the supporting masonry or framing
members with corrosion-resistant fastenings, metal ties or
by other approved devices or methods. The spacing of the
fastenings or ties shall not exceed 24 inches (610 mm) either
vertically or horizontally, but where units exceed 4 square
feet (0.4 m2) in area there shall be not less than four attachments
per unit. The metal attachments shall have a
cross-sectional area not less than provided by W 1.7 wire.
Such attachments and their supports shall be capable of
resisting a horizontal force in accordance with the wind
loads specified in Section 1609, but in no case less than 20
psf (0.958 kg/m2).

International Building Code 1405.10.2

Weather protection. Metal supports for exterior
metal veneer shall be protected by painting, galvanizing or
by other equivalent coating or treatment. Wood studs, furring
strips or other wood supports for exterior metal veneer
shall be approved pressure-treated wood or protected as
required in Section 1403.2. Joints and edges exposed to the
weather shall be caulked with approved durablewaterproofing
material or by other approved means to prevent penetration
of moisture.

International Building Code 1405.10.3

Backup. Masonry backup shall not be required
for metal veneer except as is necessary to meet the fire-resistance
requirements of this code.

International Building Code 1405.10.4

Grounding. Grounding of metal veneers on
buildings shall comply with the requirements of Chapter 27
of this code or the ICC Electrical Code.

International Building Code 1405.11

Glass veneer. The area of a single section of thin exterior
structural glass veneer shall not exceed 10 square feet (0.93
m2) where it is not more than 15 feet (4572 mm) above the level
of the sidewalk or grade level directly below, and shall not
exceed 6 square feet (0.56 m2) where it is more than 15 feet
(4572 mm) above that level.
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Length and height. The length or height of any
section of thin exterior structural glass veneer shall not
exceed 48 inches (1219 mm).

Thickness. The thickness of thin exterior structural
glass veneer shall be not less than 0.344 inch (8.7 mm).

Application. Thin exterior structural glass
veneer shall be set only after backing is thoroughly dry and
after application of an approved bond coat uniformly over
the entire surface of the backing so as to effectively seal the
surface. Glass shall be set in place with an approved mastic
cement in sufficient quantity so that at least 50 percent of the
area of each glass unit is directly bonded to the backing by
mastic not less than 0.25 inch (6.4 mm) thick and not more
than 0.625 inch (15.9 mm) thick. The bond coat and mastic
shall be evaluated for compatibility and shall bond firmly
together.

Installation at sidewalk level. Where glass
extends to a sidewalk surface, each section shall rest in an
approved metal molding, and be set at least 0.25 inch (6.4
mm) above the highest point of the sidewalk. The space
between the molding and the sidewalk shall be thoroughly
caulked and made water tight.

Installation above sidewalk level. Where
thin exterior structural glass veneer is installed above the
level of the top of a bulkhead facing, or at a level more
than 36 inches (914 mm) above the sidewalk level, the
mastic cement binding shall be supplemented with
approved nonferrous metal shelf angles located in the
horizontal joints in every course. Such shelf angles shall
be not less than 0.0478-inch (1.2 mm) thick and not less
than 2 inches (51 mm) long and shall be spaced at
approved intervals, with not less than two angles for each
glass unit. Shelf angles shall be secured to the wall or
backing with expansion bolts, toggle bolts or by other
approved methods.

Joints. Unless otherwise specifically approved
by the building official, abutting edges of thin exterior structural
glass veneer shall be ground square. Mitered joints
shall not be used except where specifically approved for
wide angles. Joints shall be uniformly buttered with an
approved jointing compound and horizontal joints shall be
held to not less than 0.063 inch (1.6 mm) by an approved
nonrigid substance or device. Where thin exterior structural
glass veneer abuts nonresilient material at sides or top,
expansion joints not less than 0.25 inch (6.4 mm) wide shall
be provided.

Mechanical fastenings. Thin exterior structural
glass veneer installed above the level of the heads of show
windows and veneer installed more than 12 feet (3658 mm)
above sidewalk level shall, in addition to the mastic cement
and shelf angles, be held in place by the use of fastenings at
each vertical or horizontal edge, or at the four corners of
each glass unit. Fastenings shall be secured to the wall or
backing with expansion bolts, toggle bolts or by other methods.
Fastenings shall be so designed as to hold the glass
veneer in a vertical plane independent of the mastic cement.
Shelf angles providing both support and fastenings shall be
permitted.

Flashing. Exposed edges of thin exterior structural
glass veneer shall be flashed with overlapping corrosion-
resistant metal flashing and caulked with a waterproof
compound in a manner to effectively prevent the entrance of
moisture between the glass veneer and the backing.

International Building Code 1405.11.1

Length and height. The length or height of any
section of thin exterior structural glass veneer shall not
exceed 48 inches (1219 mm).

International Building Code 1405.11.2

Thickness. The thickness of thin exterior structural
glass veneer shall be not less than 0.344 inch (8.7 mm).

International Building Code 1405.11.3

Application. Thin exterior structural glass
veneer shall be set only after backing is thoroughly dry and
after application of an approved bond coat uniformly over
the entire surface of the backing so as to effectively seal the
surface. Glass shall be set in place with an approved mastic
cement in sufficient quantity so that at least 50 percent of the
area of each glass unit is directly bonded to the backing by
mastic not less than 0.25 inch (6.4 mm) thick and not more
than 0.625 inch (15.9 mm) thick. The bond coat and mastic
shall be evaluated for compatibility and shall bond firmly
together.

International Building Code 1405.11.4

Installation at sidewalk level. Where glass
extends to a sidewalk surface, each section shall rest in an
approved metal molding, and be set at least 0.25 inch (6.4
mm) above the highest point of the sidewalk. The space
between the molding and the sidewalk shall be thoroughly
caulked and made water tight.

Installation above sidewalk level. Where
thin exterior structural glass veneer is installed above the
level of the top of a bulkhead facing, or at a level more
than 36 inches (914 mm) above the sidewalk level, the
mastic cement binding shall be supplemented with
approved nonferrous metal shelf angles located in the
horizontal joints in every course. Such shelf angles shall
be not less than 0.0478-inch (1.2 mm) thick and not less
than 2 inches (51 mm) long and shall be spaced at
approved intervals, with not less than two angles for each
glass unit. Shelf angles shall be secured to the wall or
backing with expansion bolts, toggle bolts or by other
approved methods.

International Building Code 1405.11.4.1

Installation above sidewalk level. Where
thin exterior structural glass veneer is installed above the
level of the top of a bulkhead facing, or at a level more
than 36 inches (914 mm) above the sidewalk level, the
mastic cement binding shall be supplemented with
approved nonferrous metal shelf angles located in the
horizontal joints in every course. Such shelf angles shall
be not less than 0.0478-inch (1.2 mm) thick and not less
than 2 inches (51 mm) long and shall be spaced at
approved intervals, with not less than two angles for each
glass unit. Shelf angles shall be secured to the wall or
backing with expansion bolts, toggle bolts or by other
approved methods.

International Building Code 1405.11.5

Joints. Unless otherwise specifically approved
by the building official, abutting edges of thin exterior structural
glass veneer shall be ground square. Mitered joints
shall not be used except where specifically approved for
wide angles. Joints shall be uniformly buttered with an
approved jointing compound and horizontal joints shall be
held to not less than 0.063 inch (1.6 mm) by an approved
nonrigid substance or device. Where thin exterior structural
glass veneer abuts nonresilient material at sides or top,
expansion joints not less than 0.25 inch (6.4 mm) wide shall
be provided.

International Building Code 1405.11.6

Mechanical fastenings. Thin exterior structural
glass veneer installed above the level of the heads of show
windows and veneer installed more than 12 feet (3658 mm)
above sidewalk level shall, in addition to the mastic cement
and shelf angles, be held in place by the use of fastenings at
each vertical or horizontal edge, or at the four corners of
each glass unit. Fastenings shall be secured to the wall or
backing with expansion bolts, toggle bolts or by other methods.
Fastenings shall be so designed as to hold the glass
veneer in a vertical plane independent of the mastic cement.
Shelf angles providing both support and fastenings shall be
permitted.

International Building Code 1405.11.7

Flashing. Exposed edges of thin exterior structural
glass veneer shall be flashed with overlapping corrosion-
resistant metal flashing and caulked with a waterproof
compound in a manner to effectively prevent the entrance of
moisture between the glass veneer and the backing.

International Building Code 1405.12

Exterior windows and doors. Windows and doors
installed in exterior walls shall conform to the testing and performance
requirements of Section 1714.5.

Installation. Windows and doors shall be
installed in accordance with approved manufacturer’s
instructions. Fastener size and spacing shall be provided in
such instructions and shall be calculated based on maximum
loads and spacing used in the tests.

Window sills. In Occupancy Groups R-2 and
R-3, one- and two-family and multiple-family dwellings,
where the opening of the sill portion of an operable window
is located more than 72 inches (1829 mm) above the finished
grade or other surface below, the lowest part of the
clear opening of the window shall be a minimum of 24
inches (610 mm) above the finished floor surface of the
room in which the window is located. Glazing between the
floor and a height of 24 inches (610 mm) shall be fixed or
have openings such that a 4-inch (102 mm) diameter sphere
cannot pass through.
Exception: Openings that are provided with window
guards that comply with ASTM F 2006 or F 2090.

International Building Code 1405.12.1

Installation. Windows and doors shall be
installed in accordance with approved manufacturer’s
instructions. Fastener size and spacing shall be provided in
such instructions and shall be calculated based on maximum
loads and spacing used in the tests.

International Building Code 1405.12.2

Window sills. In Occupancy Groups R-2 and
R-3, one- and two-family and multiple-family dwellings,
where the opening of the sill portion of an operable window
is located more than 72 inches (1829 mm) above the finished
grade or other surface below, the lowest part of the
clear opening of the window shall be a minimum of 24
inches (610 mm) above the finished floor surface of the
room in which the window is located. Glazing between the
floor and a height of 24 inches (610 mm) shall be fixed or
have openings such that a 4-inch (102 mm) diameter sphere
cannot pass through.
Exception: Openings that are provided with window
guards that comply with ASTM F 2006 or F 2090.

International Building Code 1405.13

Vinyl siding. Vinyl siding conforming to the requirements
of this section and complying with ASTM D 3679 shall
be permitted on exterior walls of buildings of Type V construction
located in areas where the basic wind speed specified in
Chapter 16 does not exceed 100 miles per hour (45 m/s) and the
building height is less than or equal to 40 feet (12 192 mm) in
Exposure C. Where construction is located in areas where the
basic wind speed exceeds 100 miles per hour (45 m/s), or building
heights are in excess of 40 feet (12 192 mm), tests or calculations
indicating compliance with Chapter 16 shall be
submitted. Vinyl siding shall be secured to the building so as to
provide weather protection for the exterior walls of the building.

Application. The siding shall be applied over
sheathing or materials listed in Section 2304.6. Siding shall
be applied to conform with the water-resistive barrier
requirements in Section 1403. Siding and accessories shall
be installed in accordance with approved manufacturer’s
instructions. Unless otherwise specified in the approved
manufacturer’s instructions, nails used to fasten the siding
and accessories shall have a minimum 0.313-inch (7.9 mm)
head diameter and 0.125-inch (3.18 mm) shank diameter.
The nails shall be corrosion resistant and shall be long
enough to penetrate the studs or nailing strip at least 0.75
inch (19 mm). Where the siding is installed horizontally, the
fastener spacing shall not exceed 16 inches (406 mm) horizontally
and 12 inches (305 mm) vertically. Where the siding
is installed vertically, the fastener spacing shall not
exceed 12 inches (305 mm) horizontally and 12 inches (305
mm) vertically.
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International Building Code 1405.13.1

Application. The siding shall be applied over
sheathing or materials listed in Section 2304.6. Siding shall
be applied to conform with the water-resistive barrier
requirements in Section 1403. Siding and accessories shall
be installed in accordance with approved manufacturer’s
instructions. Unless otherwise specified in the approved
manufacturer’s instructions, nails used to fasten the siding
and accessories shall have a minimum 0.313-inch (7.9 mm)
head diameter and 0.125-inch (3.18 mm) shank diameter.
The nails shall be corrosion resistant and shall be long
enough to penetrate the studs or nailing strip at least 0.75
inch (19 mm). Where the siding is installed horizontally, the
fastener spacing shall not exceed 16 inches (406 mm) horizontally
and 12 inches (305 mm) vertically. Where the siding
is installed vertically, the fastener spacing shall not
exceed 12 inches (305 mm) horizontally and 12 inches (305
mm) vertically.
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International Building Code 1405.14

Cement plaster. Cement plaster applied to exterior
walls shall conform to the requirements specified in Chapter
25.

International Building Code 1405.15

Fiber cement siding. Fiber cement siding complying
with Section 1404.10 shall be permitted on exterior walls
of Type I, II, III, IV and V construction for wind pressure
resistance or wind speed exposures as indicated in the manufacturer’s
compliance report and approved installation
instructions. Where specified, the siding shall be installed
over sheathing or materials listed in Section 2304.6 and shall
be installed to conform to the water-resistive barrier requirements
in Section 1403. Siding and accessories shall be
installed in accordance with approved manufacturer’s
instructions.Unless otherwise specified in the approved manufacturer’s
instructions, nails used to fasten the siding to
wood studs shall be corrosion-resistant round head smooth
shank and shall be long enough to penetrate the studs at least 1
inch (25 mm). For metal framing, all-weather screws shall be
used and shall penetrate the metal framing at least three full
threads.

International Building Code 1405.16

Fastening.Weather boarding andwall coverings shall
be securely fastened with aluminum, copper, zinc, zinc-coated
or other approved corrosion-resistant fasteners in accordance
with the nailing schedule in Table 2304.9.1 or the approved
manufacturer’s installation instructions. Shingles and other
weather coverings shall be attached with appropriate standard-
shingle nails to furring strips securely nailed to studs, or
with approved mechanically bonding nails, except where
sheathing is of wood not less than 1-inch (25 mm) nominal
thickness or of wood structural panels as specified in Table
2308.9.3(3).

International Building Code 1405.17

Fiber cement siding.

Panel siding. Panels shall be installed with the
long dimension parallel to framing. Vertical joints shall
occur over framing members and shall be sealed with caulking
or covered with battens. Horizontal joints shall be
flashed with Z-flashing and blocked with solid wood framing.

Horizontal lap siding. Lap siding shall be
lapped a minimum of 11/4 inches (32 mm) and shall have the
ends sealed with caulking, covered with an H-section joint
cover or located over a strip of flashing. Lap siding courses
shall be permitted to be installed with the fastener heads
exposed or concealed, according to approved manufacturers’
instructions.

International Building Code 1405.17.1

Panel siding. Panels shall be installed with the
long dimension parallel to framing. Vertical joints shall
occur over framing members and shall be sealed with caulking
or covered with battens. Horizontal joints shall be
flashed with Z-flashing and blocked with solid wood framing.

International Building Code 1405.17.2

Horizontal lap siding. Lap siding shall be
lapped a minimum of 11/4 inches (32 mm) and shall have the
ends sealed with caulking, covered with an H-section joint
cover or located over a strip of flashing. Lap siding courses
shall be permitted to be installed with the fastener heads
exposed or concealed, according to approved manufacturers’
instructions.

International Building Code 1405.2

Weather protection. Exterior walls shall provide
weather protection for the building. The materials of the minimum
nominal thickness specified in Table 1405.2 shall be
acceptable as approved weather coverings.

International Building Code 1405.3

Flashing. Flashing shall be installed in such a manner
so as to prevent moisture from entering the wall or to redirect it
to the exterior. Flashing shall be installed at the perimeters of
exterior door and window assemblies, penetrations and terminations
of exterior wall assemblies, exterior wall intersections
with roofs, chimneys, porches, decks, balconies and similar
projections and at built-in gutters and similar locations where
moisture could enter the wall. Flashing with projecting flanges
shall be installed on both sides and the ends of copings, under
sills and continuously above projecting trim.
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Exterior wall pockets. In exterior walls of buildings
or structures, wall pockets or crevices in which moisture
can accumulate shall be avoided or protected with caps
or drips, or other approved means shall be provided to prevent
water damage.

Masonry. Flashing and weepholes shall be
located in the first course of masonry above finished ground
level above the foundation wall or slab, and other points of
support, including structural floors, shelf angles and lintels
where anchored veneers are designed in accordance with
Section 1405.5.

International Building Code 1405.3.1

Exterior wall pockets. In exterior walls of buildings
or structures, wall pockets or crevices in which moisture
can accumulate shall be avoided or protected with caps
or drips, or other approved means shall be provided to prevent
water damage.

International Building Code 1405.3.2

Masonry. Flashing and weepholes shall be
located in the first course of masonry above finished ground
level above the foundation wall or slab, and other points of
support, including structural floors, shelf angles and lintels
where anchored veneers are designed in accordance with
Section 1405.5.

International Building Code 1405.4

Wood veneers. Wood veneers on exterior walls of
buildings of Type I, II, III and IV construction shall be not less
than 1 inch (25 mm) nominal thickness, 0.438-inch (11.1 mm)
exterior hardboard siding or 0.375-inch (9.5 mm) exterior-type
wood structural panels or particleboard and shall conform to
the following:
1. The veneer shall not exceed three stories in height, measured
from the grade plane. Where fire-retardant-treated
wood is used, the height shall not exceed four stories.
2. The veneer is attached to or furred from a
noncombustible backing that is fire-resistance rated as
required by other provisions of this code.
3. Where open or spaced wood veneers (without concealed
spaces) are used, they shall not project more than 24
inches (610 mm) from the building wall.

International Building Code 1405.5

Anchored masonry veneer. Anchored masonry
veneer shall comply with the provisions of Sections 1405.5,
1405.6, 1405.7 and 1405.8 and Sections 6.1 and 6.2 of ACI
530/ASCE 5/TMS 402.

Tolerances. Anchored masonry veneers in accordance
with Chapter 14 are not required to meet the tolerances
in Article 3.3 G1 of ACI 530.1/ASCE 6/TMS 602.

Seismic requirements. Anchored masonry
veneer located in Seismic Design Category C, E or F shall
conform to the requirements of Section 6.2.2.10 ofACI530/
ASCE5/ TMS 402. Anchored masonry veneer located in
Seismic Design Category D shall conform to the requirements
for Seismic Design Category E or F.

International Building Code 1405.5.1

Tolerances. Anchored masonry veneers in accordance
with Chapter 14 are not required to meet the tolerances
in Article 3.3 G1 of ACI 530.1/ASCE 6/TMS 602.

International Building Code 1405.5.2

Seismic requirements. Anchored masonry
veneer located in Seismic Design Category C, E or F shall
conform to the requirements of Section 6.2.2.10 ofACI530/
ASCE5/ TMS 402. Anchored masonry veneer located in
Seismic Design Category D shall conform to the requirements
for Seismic Design Category E or F.

International Building Code 1405.6

Stone veneer. Stone veneer units not exceeding 10
inches (254 mm) in thickness shall be anchored directly to
masonry, concrete or to stud construction by one of the following
methods:
1. With concrete or masonry backing, anchor ties shall be
not less than 0.1055-inch (2.68 mm) corrosion-resistant
wire, or approved equal, formed beyond the base of the
backing. The legs of the loops shall be not less than 6
inches (152 mm) in length bent at right angles and laid in
the mortar joint, and spaced so that the eyes or loops are
12 inches (305 mm) maximum on center (o.c.) in both
directions. There shall be provided not less than a
0.1055-inch (2.68 mm) corrosion-resistant wire tie, or
approved equal, threaded through the exposed loops for
every 2 square feet (0.2m2) of stone veneer. This tie shall
be a loop having legs not less than 15 inches (381 mm) in
length bent so that it will lie in the stone veneer mortar
joint. The last 2 inches (51 mm) of each wire leg shall
have a right-angle bend. One-inch (25 mm) minimum
thickness of cement grout shall be placed between the
backing and the stone veneer.
2. With stud backing, a 2-inch by 2-inch (51 by 51 mm)
0.0625-inch (1.59 mm) corrosion-resistant wire mesh
with two layers of water-resistive barrier in accordance
with Section 1404.2 shall be applied directly to wood
studs spaced a maximum of 16 inches (406 mm) o.c. On
studs, the mesh shall be attached with 2-inch-long (51
mm) corrosion-resistant steel wire furring nails at 4
inches (102 mm) o.c. providing a minimum 1.125-inch
(29 mm) penetration into each stud and with 8d common
nails at 8 inches (203 mm) o.c. into top and bottom plates
or with equivalent wire ties. There shall be not less than a
0.1055-inch (2.68 mm) corrosion-resistant wire, or
approved equal, looped through the mesh for every 2
square feet (0.2 m2) of stone veneer. This tie shall be a
loop having legs not less than 15 inches (381 mm) in
length, so bent that it will lie in the stone veneer mortar
joint. The last 2 inches (51 mm) of each wire leg shall
have a right-angle bend. One-inch (25 mm) minimum
thickness of cement grout shall be placed between the
backing and the stone veneer.

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International Building Code 1405.7

Slab-type veneer. Slab-type veneer units not exceeding
2 inches (51 mm) in thickness shall be anchored directly to
masonry, concrete or stud construction. For veneer units of
marble, travertine, granite or other stone units of slab form ties
of corrosion-resistant dowels in drilled holes shall be located in
the middle third of the edge of the units, spaced a maximum of
24 inches (610 m) apart around the periphery of each unit with
not less than four ties per veneer unit. Units shall not exceed 20
square feet (1.9 m2) in area. If the dowels are not tight fitting,
the holes shall be drilled not more than 0.063 inch (1.6 mm)
larger in diameter than the dowel, with the hole countersunk to
a diameter and depth equal to twice the diameter of the dowel in
order to provide a tight-fitting key of cement mortar at the
dowel locations when the mortar in the joint has set.Veneer ties
shall be corrosion-resistant metal capable of resisting, in tension
or compression, a force equal to two times the weight of
the attached veneer. If made of sheet metal, veneer ties shall be
not smaller in area than 0.0336 by 1 inch (0.853 by 25 mm) or,
if made of wire, not smaller in diameter than 0.1483-inch (3.76
mm) wire.

International Building Code 1405.8

Terra cotta. Anchored terra cotta or ceramic units not
less than 1.625 inches (41 mm) thick shall be anchored directly
to masonry, concrete or stud construction. Tied terra cotta or
ceramic veneer units shall be not less than 1.625 inches (41
mm) thick with projecting dovetail webs on the back surface
spaced approximately 8 inches (203 mm) o.c. The facing shall
be tied to the backing wall with corrosion-resistant metal
anchors of not less than No. 8 gage wire installed at the top of
each piece in horizontal bed joints not less than 12 inches (305
mm) nor more than 18 inches (457 mm) o.c.; these anchors
shall be secured to 0.25-inch (6.4 mm) corrosion-resistant pencil
rods that pass through the vertical aligned loop anchors in
the backing wall. The veneer ties shall have sufficient strength
to support the full weight of the veneer in tension. The facing
shall be set with not less than a 2-inch (51 mm) space from the
backing wall and the space shall be filled solidly with portland
cement grout and pea gravel. Immediately prior to setting, the
backing wall and the facing shall be drenched with clean water
and shall be distinctly damp when the grout is poured.

International Building Code 1405.9

Adhered masonry veneer. Adhered masonry veneer
shall comply with the applicable requirements in Section
1405.9.1 and Sections 6.1 and 6.3 of ACI 530/ASCE 5/TMS
402.

Interior adhered masonry veneers. Interior
adhered masonry veneers shall have a maximum weight of
20 psf (0.958 kg/m2) and shall be installed in accordance
with Section 1405.9. Where the interior adhered masonry
veneer is supported by wood construction, the supporting
members shall be designed to limit deflection to 1/600 of the
span of the supporting members.

International Building Code 1405.9.1

Interior adhered masonry veneers. Interior
adhered masonry veneers shall have a maximum weight of
20 psf (0.958 kg/m2) and shall be installed in accordance
with Section 1405.9. Where the interior adhered masonry
veneer is supported by wood construction, the supporting
members shall be designed to limit deflection to 1/600 of the
span of the supporting members.