ESR 1338 Gypsum Association

User Manual: 1338

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ASubsidiaryof

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000

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MostWidelyAcceptedandTrusted

ICC‐ESEvaluationRe

ort ESR‐1338

Reissued02/2018

Thisreportissubjecttorenewal02/2019.

ICC‐ES|(800)423‐6587|(562)699‐0543|www.icc‐es.org

ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not

specifically addressed, nor are they to be construed as an endorsement of the subject of the report or a

recommendation for its use. There is no warranty by ICC Evaluation Service, LLC, express or implied, as

to any finding or other matter in this report, or as to any product covered by the report.

2018ICCEvaluationService,LLC.Allrightsreserved.

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DIVISION:090000—FINISHES

SECTION:092116—GYPSUMBOARDASSEMBLIES

SECTION:092116.23—GYPSUMBOARDSHAFTWALLASSEMBLIES

SECTION:092116.33—GYPSUMBOARDSEPARATIONWALLASSEMBLIES



REPORTHOLDER:

GYPSUMASSOCIATION



962WAYNEAVENUE,SUITE620

SILVERSPRING,MARYLAND20910

EVALUATIONSUBJECT:



GYPSUMWALLANDCEILINGASSEMBLIESAND

GYPSUMBOARDINTERIORANDEXTERIORAPPLICATIONS

LookforthetrustedmarksofConformity!

ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not specifically addressed, nor are they to be construed

as an endorsement of the subject of the report or a recommendation for its use. There is no warranty by ICC Evaluation Service, LLC, express or implied, as

to any finding or other matter in this report, or as to any product covered by the report.

ICC-ES Evaluation Report ESR-1338

Reissued February 2018

This report is subject to renewal February 2019.

www.icc-es.org | (800) 423-6587 | (562) 699-0543 A Subsidiary of the International Code Council

DIVISION: 09 00 00—FINISHES

Section: 09 21 16—Gypsum Board Assemblies

Section: 09 21 16.23—Gypsum Board Shaft Wall

Assemblies

Section: 09 21 16.33—Gypsum Board Area Separation

Wall Assemblies

REPORT HOLDER:

GYPSUM ASSOCIATION

962 WAYNE AVENUE, SUITE 620

SILVER SPRING, MARYLAND 20910

(301) 277-8686

www.gypsum.org

EVALUATION SUBJECT:

GYPSUM WALL AND CEILING ASSEMBLIES AND

GYPSUM BOARD INTERIOR AND EXTERIOR

APPLICATIONS

1.0 EVALUATION SCOPE

Compliance with the following codes:

 2018, 2015, 2012 and 2009 International Building

Code

(IBC)

 2018, 2015, 2012 and 2009 International Residential

Code

(IRC)

 2013 Abu Dhabi International Building Code (ADIBC)

†

The ADIBC is based on the 2009 IBC. 2009 IBC code sections referenced

in this report are the same sections in the ADIBC.

Properties evaluated:

 Interior finish

 Fire-resistance

 Sound control

 Structural

 Thermal barrier

 Exterior finish

2.0 USES

This evaluation report recognizes gypsum products for

specific interior and exterior applications, and also

recognizes various load-bearing and nonload-bearing fire-

resistance-rated wall, floor-ceiling and roof-ceiling gypsum

board assemblies. Some assemblies also provide sound

transmission control. Structural evaluation is limited to

transverse loading.

3.0 DESCRIPTION

The gypsum products and fire-resistance-rated wall, floor-

ceiling and roof-ceiling assemblies must conform to

Section 4.0 of this report using materials as described

below. Gypsum boards must comply with ASTM C1396-

14a for use under the 2018 IBC and IRC.

3.1 Water-resistant Gypsum Backing Board:

The backing board must conform to ASTM C1396.

3.2 Gypsum Wallboard:

The wallboard must conform to ASTM C1396.

3.3 Exterior Gypsum Soffit Board:

The soffit board must conform to ASTM C1396.

3.4 Gypsum Sheathing Board:

The sheathing board must conform to ASTM C1396.

3.5 Gypsum Backing Board, Core Board and Gypsum

Shaftliner Board:

The backing, core board and shaftliner must conform to

ASTM C1396.

3.6 Gypsum Base for Veneer Plasters:

The gypsum base must conform to ASTM C1396.

3.7 Gypsum Ceiling Board:

The ceiling board must conform to ASTM C1396.

3.8 Screws:

Type S, Type W and Type G screws specified for the

assemblies described in this report must comply with

ASTM C1002 or ASTM C954.

4.0 INSTALLATION

4.1 General:

Installation of the gypsum board wall and ceiling

assemblies and interior and exterior applications as

described below must comply with this report and the

Gypsum Association’s published installation instructions.

The Gypsum Association’s published installation

instructions must be available at the jobsite at all times

during installation.

The gypsum products recognized in this report must be

assembled and installed in accordance with IBC Section

2508.1 or IRC Section R702.3.1, as applicable. Gypsum

board must not be used in areas subject to continuous high

humidity, such as saunas, steam rooms, gang shower

rooms or indoor pools.

ESR-1338 | Most Widely Accepted and Trusted Page 2 of 5

4.2 Fire-resistance-rated Wall, Floor-ceiling and Roof-

ceiling Gypsum Board Assemblies:

4.2.1 General Fire-resistance-rated Design Information:

a. The axial design stress of the wood studs used in fire-

resistive construction must be reduced to 0.78Fʹc,

calculated in accordance with Section 3.6 of the

ANSI/AWC National Design Specification (NDS) for

Wood Construction 2018 edition for the 2018 IBC,

2015 edition for the 2015 IBC, 2012 edition for the

2012 IBC and 2005 for the 2009 IBC, with the

maximum design stress not greater than 78 percent of

the calculated allowable stress with studs having a

slenderness ratio, le/d, of 33.

b. When gypsum board is used in fire-resistive

floor/ceiling, roof/ceiling, or wall assemblies, the board

thickness, type of gypsum board, and construction of

the assembly must comply with Chapter 7 of the IBC;

Section R302 of the IRC; the Gypsum Association

Fire Resistance Design Manual, GA-600, 21st Edition

for the 2018 IBC, 20th Edition for the 2015 IBC or

19th Edition for the 2012 and 2009 IBC; or current

ICC-ES evaluation reports. The Gypsum Association

Fire Resistance Design Manual GA-600 (21st Edition),

although not specifically listed as a reference

standard in the 2009, 2012, or 2015 IBC, is an

acceptable alternative to the 19th and 20th Editions

when approved by the code official.

c. Except where otherwise noted in this report, any of

the gypsum boards listed in Section 3.0, of the same

size, thickness, and core type specified, may be used.

The gypsum base for veneer plasters must be

covered with minimum 1/16-inch-thick (1.6 mm)

gypsum veneer plaster.

4.2.2 Fire-resistance-rated Assemblies: Generic fire-

resistance-rated systems (those not designated as

proprietary in the listing), as listed in the Gypsum

Association Fire Resistance Design Manual, GA-600, 21st

Edition for the 2018 IBC, 20th Edition for the 2015 IBC, or

19th edition for the 2012 and 2009 IBC, are recognized for

use. The Gypsum Association Fire Resistance Design

Manual GA-600 (21st Edition), although not specifically

listed as a reference standard in the 2009, 2012, or

2015 IBC, is an acceptable alternative to the 19th and 20th

Editions, when approved by the code official.

4.2.2.1 Two-hour Gypsum Board Solid Partition for

Shaft Enclosure: The assembly is similar to Item 9-1.1 of

Table 721.1(2) of the 2018, 2015 and 2012 IBC (Item 9-1.1

of Table 720.1(2) of the 2009 IBC), except that the gypsum

shaftliner is first installed onto 2-by-2-inch (51 by 51 mm)

steel floor and ceiling runners using Type S screws spaced

12 inches (305 mm) on center. The runners must be

anchored at 24 inches (610 mm) on center, using

approved fasteners. Two layers of 1/2-inch-thick (12.7 mm),

Type X gypsum board installed with long edges parallel to

wrapped coreboard edges are laminated to one side of the

coreboard. All vertical joints must be offset at least

3 inches (76 mm).

The assembly may also be constructed with four layers

of 1/2-inch-thick (12.7 mm), Type X gypsum board,

laminated together, with the joints of each layer offset at

least 3 inches (76 mm) from the adjoining layers. The

laminating compound must comply with ASTM C475 or be

an approved powder setting–type compound. The first

layer is attached to the 2-by-2-inch (51 by 51 mm) steel

floor and ceiling angle runners using one 7/8-inch-long

(22 mm), Type S screw at each corner. The second layer

is then fully laminated to the first layer and screw-attached

to the runners using 115/16-inch-long (49.2 mm), Type S

screws spaced 12 inches (305 mm) on center. The third

layer is laminated in the same manner as the second layer,

and is further attached using 11/2-inch-long (38 mm), Type

G screws spaced 24 inches (610 mm) on center along the

edges and along the center, and held back 21/2 inches

(63.5 mm) from the top and bottom edges. The fourth layer

is fully laminated, with all of the vertical joints being offset.

4.2.2.2 One-hour Gypsum Board Partition with Wood

Framing: The framing consists of nominal 2-by-4 wood

studs spaced 16 inches (406 mm) on center, with blocking

of the same size at midheight. Each side of the wall is

covered with a single layer of 5/8-inch-thick (15.9 mm),

Type X gypsum board applied either perpendicular to or

parallel to the framing. The gypsum board is attached to

the framing using No. 6 by 11/4-inch-long (31.7 mm),

buglehead, Type W screws spaced 8 inches (203 mm) on

center along end joints and 12 inches (305 mm) on center

in the field. Screws are placed no closer than 1/2 inch

(12.7 mm) to end or edge joints. Vertical joints are

staggered 16 inches (406 mm) on center, and horizontal

joints are staggered 12 inches (305 mm) on center on each

side. The joints are taped with joint tape and covered with

two coats of joint compound. Screw heads are covered

with joint compound.

4.2.2.3 One-hour Gypsum Board Staggered-stud

Bearing Partition: The framing consists of two rows of

nominal 2-by-3 wood studs spaced at 16 inches (406 mm)

on center or nominal 2-by-4 wood studs spaced at

24 inches (610 mm) on center, with blocking of the same

size at midheight. Studs in opposite rows are staggered

8 inches (203 mm) or 12 inches (305 mm) on center, and

the rows are spaced a minimum of 1 inch (25.4 mm) apart.

The plates for each row may be of the same size and

material, or common plates may be used for the two rows.

The exterior face of each row is then covered with

5/8-inch-thick (15.9 mm), Type X gypsum board applied

horizontally or vertically using 6d cement-coated cooler

nails at 7 inches (178 mm) on center, with end joints on

nailing members. Fire-blocks, when required, may be of

mineral wool batts, 2 inches (51 mm) thick in the

intervening spaces between the two rows of studs, or

1/2-inch-thick (12.7 mm) gypsum board. Where nominally

2-by-3 studs are used, they must be stress-graded lumber

as set forth in Table 4C of the supplement of the NDS.

4.2.2.4 One-hour Gypsum Board Floor-ceiling or

Roof-ceiling Assembly with Wood Framing: The ceiling

construction is identical to assembly FC5406 in the

Gypsum Association Fire Resistance Design Manual.

Alternate framing consists of lower chords of trussed

rafters, or pitched or flat trusses spaced a maximum of

24 inches (610 mm) on center. Alternate fasteners, having

the same spacing as the screws, are 17/8-inch-long

(47.6 mm), 6d, cooler, box or wallboard nails for the base

ply, and 23/8-inch-long (60 mm), 8d, cooler, box or

wallboard nails for the face ply. Type G screws, 11/2 inches

(38 mm) long, are still required at the end joints of the

gypsum board face layer.

4.2.2.5 One-hour Gypsum Board Roof-ceiling

Assembly with Steel Framing: The assembly consists of

steel roof framing with roof purlins spaced and designed to

support a noncombustible ceiling grid to which is attached

double 5/8-inch-thick (15.9 mm), Type X gypsum board.

Cold-rolled steel main runner channels at 4 feet (1219 mm)

on center, with size and hanger support complying with

Section 2506.2.1 of the IBC, are hung from the steel

framing. Number 25 gage, 7/8-inch-deep (22 mm), rigid

cross-furring channels are spaced 24 inches (610 mm) on

ESR-1338 | Most Widely Accepted and Trusted Page 3 of 5

center. Furring channels are wire-tied to the runner

channels using loops of No. 16 gage wire. The base layer

of 5/8-inch-thick (15.9 mm), Type X gypsum board is

applied at right angles to the furring channels using

1-inch-long (25.4 mm), Type S screws spaced at 24 inches

(610 mm) on center. The face layer of 5/8-inch-thick

(15.9 mm), Type X gypsum board is applied at right angles

to the furring channels, using 15/8-inch-long (41.3 mm),

Type S screws spaced at 12 inches (305 mm) on center at

joints, driven through the base layer and into the

intermediate furring channels. Face layer joints are offset

24 inches (610 mm) from the base layer joints. One-and-

one-half-inch-long (38 mm), Type G screws, placed

2 inches (51 mm) from either side of the face layer end

joints, are also installed at 12 inches (305 mm) on center.

The addition of insulation to the assembly is permitted,

provided a minimum plenum space of 10 inches (254 mm)

is maintained between the underside of the insulation and

the gypsum panel.

4.2.2.6 Two-hour Gypsum Board Bearing Wall with

Minimum STC (Sound Transmission Class) 50 Sound

Rating: The construction consists of nominally 2-by-4

wood studs spaced 16 inches (406 mm) on center, faced

on each side with two layers of 5/8-inch-thick (15.9 mm),

Type X gypsum board. On one side, the gypsum board is

fastened directly to the studs as specified for interior

partitions in Item 14-1.5 of Table 721.1(2) of the 2018,

2015 and 2012 IBC (Item 14-1.5 of Table 720.1(2) of the

2009 IBC); on the other side, resilient furring channels

spaced 24 inches (610 mm) on center are applied

horizontally over the wood studs and are attached using 6d

common or 11/4-inch (31.7 mm) wallboard nails or

1-inch-long (25.4 mm), Type W or Type S screws. The

5/8-inch-thick (15.9 mm), Type X gypsum board is applied

horizontally and is attached along longitudinal edges to the

furring channels using 1-inch-long (25.4 mm), Type S

screws spaced 12 inches (305 mm) on center. Six-inch-

wide (152 mm) strips of gypsum board are installed behind

unsupported vertical butt joints and are attached at the

ends and along the length of the strips using Type G,

11/2-inch-long (38 mm) screws spaced 12 inches (305 mm)

on center. A face layer of 5/8-inch-thick (15.9 mm), Type X

gypsum board is applied with joints staggered from the

base layer joints and secured to the resilient furring

channels using 15/8-inch-long (41.3 mm), Type S screws

spaced 12 inches (305 mm) on center. With this partition, a

minimum STC rating of 50 is attained. When desired, glass

fiber or mineral wool insulation may be installed in the stud

cavities.

4.2.3 Alternate Fire-resistance-rated Construction:

4.2.3.1 Alternate Suspended Ceiling Construction:

Gypsum board ceilings directly attached to steel framing as

set forth in Table 721.1(3) of the 2018, 2015 and 2012 IBC

(Table 720.1(3) of the 2009 IBC) may be suspended by

means of 11/2-inch (38 mm), cold-rolled steel, main runner

channels, spaced 48 inches (1219 mm) on center, that are

suspended with No. 8, SWG galvanized wire hangers

spaced 48 inches (1219 mm) on center. Furring channels

are placed perpendicular to the cold-rolled steel main

runner channels and are secured thereto using No. 18,

SWG galvanized wire ties (double strand); the gypsum

board is then installed in the manner required for direct

attachment.

4.2.3.2 Alternate Gypsum Board Fasteners: Screws,

either Type W or Type S, depending on the framing

member, may be used in lieu of nails in fire-resistance-

rated assemblies described in this report or described in

Tables 721.1(2) and 721.1(3) of the 2018, 2015 and 2012

IBC (Tables 720.1(2) and 720.1(3) of the 2009 IBC),

provided the screw penetration into the framing member is

equivalent to the nail penetration, the screw spacing is the

same as the nail spacing, and the cross-sectional area of

the screws is equal to that of the specified nails.

4.2.3.3 Joint Treatment: For the fire-resistive assemblies

in this report, taping and finishing of joints and fasteners is

permitted to be omitted in the following cases:

a. Where there is square-edge gypsum board or tongue-

and-groove-edge (V-edge) gypsum backing board or

gypsum sheathing.

b. In single-layer applications on wood-framed

assemblies where joints fall over framing members.

c. On inner layers and outer layers of multiple-layer

wood-framed or steel-framed assemblies, where the

joints of adjacent layers are offset from each other.

4.3 Sound Control Systems:

Generic sound control systems, as listed in the Gypsum

Association Fire Resistance Design Manual, GA-600 21st

Edition for the 2018 IBC, 20th Edition for the 2015 IBC, or

19th edition for the 2012 and 2009 IBC, are recognized for

use. The Gypsum Association Fire Resistance Design

Manual GA-600 (21st Edition), although not specifically

listed as a reference standard in the 2009, 2012, or 2015

IBC, is an acceptable alternative to the 19th and 20th

Editions when approved by the code official. Partition

systems must be sealed at perimeter and around cut-outs

using beads of non-hardening caulking compound, except

that tape and joint compound are permitted to be used in

lieu of caulking above the top plate in wood-framed

systems. Where carpet and pad are specified for the IIC

sound rating shown in the manual, the carpet must be a

44-ounce (1492 g/m2) wool carpet with a 40-ounce (1356

g/m2) hair pad.

Except where otherwise noted in this report, any of the

gypsum boards listed in Section 3.0, of the same size,

thickness, and core type specified, may be used.

4.4 Allowable Partition Heights:

4.4.1 Gypsum Board or Veneer Base: To comply with

2018 IBC Section 1607.15 (2015 and 2012 IBC Section

1607.14 and 2009 IBC Section 1607.13) and Table 1604.3

of the 2018, 2015 and 2012 IBC, Section 1607.13 and

Table 1604.3 of the 2009 IBC, the allowable height limits of

non-bearing partitions are as follows:

Partitions utilizing No. 25 gage [minimum 0.0179 inch

(0.454 mm) uncoated base-metal thickness] steel channel

studs conforming to ASTM C645 must have maximum

heights as set forth in a current ICC-ES evaluation report.

Mechanical fastening of intermediate studs to the track is

not required unless this is specified in the evaluation

report.

4.5 Joint Treatment at Areas to Receive Tile:

Gypsum board joints, including those at all angle

intersections, which are under areas to receive tile or wall

panels, must be treated with joint compound and tape, but

must not be finish-coated. All cut edges and openings

around pipes and fixtures must be treated with an

approved, water-resistant, flexible compound or caulk.

Areas to be tiled that are covered with a joint compound

must be skim-coated with bedding adhesive. The bedding

adhesive for ceramic tile must conform to ANSI A136.1 for

Organic Adhesives for Installation of Ceramic Tile, Type I.

4.6 Exterior Surfaces:

4.6.1 Exterior Ceiling Surfaces:

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4.6.1.1 Location: Exterior gypsum soffit board may be

used as a ceiling finish at exterior locations such as

carports, open porches, walkways, soffits and similar

installations that are horizontal or inclined downward away

from the building. Gypsum wallboard is permitted for use

as a ceiling finish at exterior horizontal applications not

exposed to the weather as defined by Chapter 2 of the

2018 and 2015 IBC (Section 2502 of the 2012 and 2009

IBC), or Section R702.3.5 of the IRC.

4.6.1.2 Framing: Maximum spacing of framing members

must be 16 inches (406 mm) on center when supporting

1/2-inch-thick (12.7 mm) board, and must be 24 inches

(610 mm) on center when supporting 5/8-inch-thick

(15.9 mm) board. Gypsum board applications

perpendicular to framing members must comply with

ASTM C840 (IBC), or Table R702.3.5 of the IRC.

4.6.1.3 Joints: In ceiling areas having long runs, the

maximum spacing of expansion joints must be 30 feet

(9.144 m). A 1/4-inch (6.4 mm) clearance joint is required

between gypsum board and adjacent walls, fascia, beams

or columns. Fascia boards must extend downward past the

ceiling board surface a minimum of 1/4 inch (6.4 mm).

Exterior gypsum soffit board or gypsum wallboard joints

and fastener heads must be provided with joint treatment.

An alternate joint treatment is batten strips.

4.6.1.4 Surface Treatment: The exterior gypsum soffit

board and the gypsum wallboard as allowed by the

applicable code must have one of the following surface

treatments applied at the jobsite:

a. One coat of latex exterior paint applied over an oil-

base primer.

b. Two coats of an oil- or alkyd-based exterior paint.

4.7 Thermal Barrier:

Regular gypsum board, a minimum of 1/2-inch (12.7 mm)

thick, is permitted to be used as a thermal barrier in

accordance with Sections 2603.4 or 2603.5.2 of the IBC or

Section R316.4 of the IRC. The gypsum board must be

attached in such a manner that it will remain in place for

15 minutes of fire exposure. For walls constructed of wood

framing, attachment of the gypsum board in accordance

with ASTM C840 (IBC), or IRC Section R702.3.5, is

permitted. For other construction, attachment of the

gypsum wallboard must comply with a specific ICC-ES

evaluation report, or the method of attachment must be

qualified by testing in accordance with FM 4880, UL 1040,

NFPA 286 or UL 1715 (IBC and IRC).

4.8 Shear Walls:

Table 1 shows maximum allowable shear values for

gypsum board shearwalls. Gypsum board must be applied

either horizontally or vertically on nominally 2-by-4 (50 by

102 mm) wood studs. Additionally, Section 2505 of the IBC

or R602.10 of the IRC is applicable.

5.0 CONDITIONS OF USE

The gypsum board wall and ceiling assemblies and interior

and exterior applications described in this report comply

with, or are suitable alternatives to what is specified in,

those codes listed in Section 1.0 of this report, subject to

the following conditions:

5.1 Installation must comply with this report, the Gypsum

Association’s published installation instructions and

the applicable code. In the event of a conflict between

the Gypsum Association’s published installation

instructions and this report, this report governs.

5.2 Partition construction and heights are as set forth in

this report. Indicated stud spacings are maximums.

Stud sizes (depths) and gages are minimums.

5.3 In jurisdictions adopting the IBC or IRC, gypsum

board must not be used to resist seismic forces in

structures in Seismic Design Category E or F.

5.4 Documentation must be submitted to the code official

verifying that the gypsum board products to be

installed comply with the applicable standard noted in

Section 3.0 of this report.

5.5 Calculations and details must be submitted to the

code official for approval of structural-use

applications.

6.0 EVIDENCE SUBMITTED

6.1 Reports of testing in accordance with ASTM E119

(UL 263).

6.2 Reports of testing in accordance with ASTM E84

(UL 723).

6.3 Reports of transverse load testing in accordance with

UL 1296.

6.4 Reports of sound transmission testing in accordance

with ASTM E90 and ASTM E413.

6.5 Reports of testing in accordance with ASTM C473.

6.6 Reports of racking shear wall testing in accordance

with ASTM E72.

7.0 IDENTIFICATION

Gypsum boards must be identified by the manufacturer’s

name, the thickness, the brand name and the ASTM

specification. Gypsum board products that have been

evaluated by ICC-ES for compliance with the standards

indicated in Section 3.0 of this report must also be

identified by the ICC-ES report number associated with the

specific product.

Bundles of steel studs must be identified as set forth in a

current ICC-ES evaluation report on the product. Screws

must be identified on the packaging by the name, brand or

trademark of the producer or supplier and the ASTM

designation.

ESR-1338 | Most Widely Accepted and Trusted Page 5 of 5

TABLE 1—ALLOWABLE SHEAR FOR WIND OR SEISMIC FORCES (pounds per foot)

FOR VERTICAL DIAPHRAGMS OF GYPSUM BOARD WOOD-FRAMED WALLS1, 2

BOARD

THICKNESS

(in.)

WALL

CONSTRUCTION

MINIMUM FASTENER SIZE

MAXIMUM STUD

SPACING (in.)

MAXIMUM

FASTENER SPACING

(in.)

ALLOWABLE

SHEAR VALUE

(plf)

Edges Field

1/2 Unblocked 5d cooler or wallboard nails 24 7 7 75

4 4 110

/8 Unblocked 6d cooler or wallboard nails 24 4 4 145

/2 Unblocked No. 6 - 1

/4-inch screws 16 8 12 60

/2 Blocked

No. 6 - 1

/4-inch screws 16 4 16 160

/2 Blocked

No. 6 - 1

/4-inch screws 16 4 12 155

/2 Blocked

No. 6 - 1

/4-inch screws 24 8 12 70

/2 Blocked

No. 6 - 1

/4-inch screws 16 6 12 90

/8 Unblocked No. 6 - 1

/4-inch screws 16 8 12 70

/8 Blocked

No. 6 - 1

/4-inch screws 16 8 12 90

For SI: 1 inch = 25.4 mm, 1 plf = 14.6 N/m.

1Shear walls are not permitted to resist loads imposed by masonry or concrete construction. See Section 2306.3 of the 2018, 2015 and 2012 IBC, Section 2306.7 of

the 2009 IBC, or Section R602.10 of the IRC. Values are for short-term loading from wind or seismic forces. Values must be reduced by 25 percent for normal

loading. Values must not be used in IBC Seismic Design Categories E and F.

2The shear values are permitted to be additive when identical materials applied as specified in the table are applied to both sides of the wall.

3Screws must be Type W or Type S drywall screws.

4All board edges must be blocked.

ESR 1338 Gypsum Association

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