PRELIMINARY DRAFT
General Specification
Notes:
Revised:
August 20, 2012
References in blue are general indicators to the specifier.
References in red relate to fire-rated assemblies and/or code
related issues, if not applicable, delete.
References in purple are indicators of a discontinued product.
SECTION 09290 / 09 29 00 Gypsum Board
Assemblies
USG Drywall
Product Specification
SECTION 09290 / 09 29 00
GYPSUM DRYWALL
PART 1 GENERAL
1.01
SUMMARY
A. Section Includes:
1. Metal stud wall framing.
2. Shaftwall system.
3. Interior gypsum drywall partitions, ceilings, and furring.
4. Exterior gypsum sheathing.
5. Exterior glass-mat gypsum sheathing
6. Cementitious backer board.
7. Acoustical insulation.
8. Drywall trims accessories.
9. Joint treatment and textures.
10. Gypsum board primer.
B. Related Sections:
1. Section 05400 / 05 40 00 - Cold-Formed Metal Framing
2. Section 06100 / 06 10 00 - Rough Carpentry
3. Section 07210 / 07 21 00 - Building Insulation
4. Section 07270 / 07 27 00 - Firestopping
5. Section 09310 / 09 31 00 - Ceramic Tile
6. Section 09510 / 09 51 00 – Acoustical Ceilings
7. Section 09910 / 09 91 00 – Paints
C.
1.02
Allowances: Refer to Section 01020 / 01 02 00 for allowances involving Work of this Section.
REFERENCES
A. American National Standards Institute (ANSI):
1. ANSI 108.11, (1992) American National Standard for Interior Installation of Cementitious
Backer Units.
2. ANSI A118.9, (1992) Test Methods and Specifications for Cementitious Backer Units.
B. American Society for Testing and Materials (ASTM):
1. ASTM A446, Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) by the
Hot-Dip Process, Structural Steel Quality.
2. ASTM A525, Standard Specification for General Requirements for Steel Sheet, ZincCoated (Galvanized) by the Hot-Dip Process.
3. ASTM A1003, Standard Specification for Steel Sheet, Carbon, Metallic- and NonmetallicCoated for Cold-Formed Framing Members.
GYPSUM DRYWALL
09290 / 09 29 00-1
4. ASTM E96, Standard Test Methods for Water Vapor Transmission of Materials.
5. ASTM C473, Standard Test Methods for Physical Testing of Gypsum Panel Products.
6. ASTM C475, Standard Specification for Joint Compound and Joint Tape for Finishing
Gypsum Board.
7. ASTM C514, Standard Specification for Nails for the Application of Gypsum Board.
8. ASTM C557, Standard Specification for Adhesives for Fastening Gypsum Wallboard to
Wood Framing.
9. ASTM C635, Standard Specification for Metal Suspension Systems.
10. ASTM C636, Recommended Practice for Installation of Metal Suspension Systems.
11. ASTM C645, Standard Specification for Nonstructural Steel Framing Members.
12. ASTM C665, Standard Specification for Mineral-Fiber Blanket Thermal Insulation for
Light Frame Construction and Manufactured Housing.
13. ASTM C754, Standard Specification for Installation of Steel Framing Members to
Receive Screw-Attached Gypsum Panel Products.
14. ASTM C834, Standard Specification for Latex Sealants.
15. ASTM C840, Standard Specification for Application and Finishing of Gypsum Board.
16. ASTM C844, Specification of Application
17. ASTM C919, Standard Practice for Use of Sealants in Acoustical Applications.
18. ASTM C1002, Standard Specification for Steel Self-Piercing Tapping Screws for the
Application of Gypsum Panel Products or Metal Plaster Bases to Wood Studs or Steel
Studs.
19. ASTM C1047, Standard Specification for Accessories for Gypsum Wallboard and
Gypsum Veneer Base.
20. ASTM C1177/C1177M Standard Specification for Glass Mat Gypsum Substrate for Use
as Sheathing.
21. ASTM C1178/C1178M Standard Specification for Coated Glass Mat Water-Resistant
Gypsum Backing Panel.
22. ASTM C1186, Standard Specification for Flat Non-Asbestos Fiber-Cement Sheets.
23. ASTM C1264, Standard Specification for Sampling, Inspection, Rejection, Certification,
Packaging, Marking, Shipping, Handling, and Storage of Gypsum Board.
24. ASTM C1278/C1278M, Standard Specification for Fiber-Reinforced Gypsum Panel.
25. ASTM C1280, Standard Specification for the Application of Gypsum Sheathing Board.
26. ASTM C1396/C1396M, Standard Specification for Gypsum Board - Formerly:
a. ASTM C36/C36M, Standard Specification for Gypsum Wallboard.
b. ASTM C37/C37M Standard Specification for Gypsum Lath.
c. ASTM C79M, Standard Specification for Treated Core and Nontreated Core Gypsum
Sheathing Board.
d. ASTM C442/C442M, Standard Specification for Gypsum Backing Board, Gypsum
Coreboard, and Gypsum Shaft liner Board.
e. ASTM C588/C588M. Standard Specification for Gypsum Base for Veneer Plasters
f. ASTM C630/C630M, Standard Specification for Water-Resistant Gypsum Backing
Board.
g. ASTM C931/C931M, Standard Specification for Exterior Gypsum Soffit Board.
h. ASTM C960/C960M, Standard Specification for Predecorated Gypsum Board.
i. ASTM C1395/C1395M, Specification for Gypsum Ceiling Board.
27. ASTM C1629/C1629M, Standard Classification for Abuse-Resistant Nondecorated
Interior Gypsum Panel Products and Fiber-Reinforced Cement Panels
28. ASTM D2394, Standard Method for Simulated Service Testing of Wood and Wood-Base
Finish Flooring
29. ASTM D4977, Standard Test Method for Granule Adhesion to Mineral Surfaced Roofing
by Abrasion. (Modified for Surface Abrasion).
30. ASTM D5420, Standard Test Method for Impact Resistance of Flat, Rigid Plastic
Specimen by Means of a Striker Impacted by a Falling Weight (Gardner Impact).
31. ASTM E84, Standard Test Method for Surface Burning Characteristics of Building
Materials.
GYPSUM DRYWALL
09290 / 09 29 00-2
32. ASTM E90, Standard Test Method for Laboratory Measurement of Airborne Sound
Transmission Loss of Building Partitions and Elements.
33. ASTM E119, Standard Test Methods for Fire Tests of Building Construction and
Materials.
34. ASTM E330, Standard Test Method for Structural Performance of Exterior Windows,
Curtain Walls, and Doors by Uniform Static Air Pressure Difference.
35. ASTM E695, Standard Method for Measuring Relative Resistance of Wall, Floor, and
Roof Construction to Impact Loading.
36. CISCA – Ceilings & Interior Systems Construction Association.
http://cisca.org/publications/
37. CISCA Ceiling Systems Installation Handbook.
38. GA – Gypsum Association. http://gypsum.org/securepubs/form.asp
a. GA-201, Using Gypsum Board for Walls & Ceilings.
b. GA-214, Recommended Levels of Gypsum Board Finish.
c. GA-216, Application and Finishing of Gypsum Board.
d. GA-232, Painting New Gypsum Board.
e. GA-253, Application of Gypsum Sheathing.
f. GA-600, Fire Resistance Design Manual
40. UL - Underwriters Laboratories Fire Resistance Directory. http://www.ul.com/database/
41. CONSTRUCTION HANDBOOK
1.03
SUBMITTALS
A. General: Submit in accordance with Section 01300.
B. Product Data:
C. Submit manufacturer’s current descriptive literature showing installation and product
specifications for each product specified. At time of installation – check for changes and
updates prior to proceeding. Obtain proper approval of literature changes to proceed.
1. Include data to indicate fire, sound, loading, and abrasive ratings of tested assemblies
accepted by authorities having jurisdiction. Include Material Safety Data Sheets.
2. Samples: Submit texture samples on minimum 4"x8" gypsum board for acceptance by
Architect.
D. LEED® Submittals:
1. Product Data for Credit MR 4: For products having recycled content, documentation
indicating percentages by weight of postconsumer and preconsumer recycled content.
a. Include statement indicating costs for each product having recycled content.
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Include quality assurance requirements consistent with size and scope of project and extent of work of this section.
Single-source manufacturer insures unit responsibility.
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1.04
QUALITY ASSURANCE
A. Manufacturer Qualifications: Gypsum board, related joint treatments, textures, and gypsum
board primer from single-source manufacturer.
B. Installer Qualifications: Acceptable manufacturer with 5 years experience in performing the
Work in this Section on projects of similar nature.
C. Regulatory Requirements: Conform and provide gypsum board assemblies to meet
applicable building code requirements for fire rated assemblies.
D. Sound Transmission Characteristics: For gypsum board assemblies with STC ratings,
materials and construction shall be identical to those of the assemblies tested and STC
determined according to ASTM E90 and classified according to ASTM E413 by an
independent testing agency.
E. Jobsite Mockup:
GYPSUM DRYWALL
09290 / 09 29 00-3
1 Complete [___] lineal feet of each typical finished partition with a corner, typical door
with/without sidelight, and [__] typical ceiling lights to simulate critical finished lighting
conditions for acceptance by Architect.
2 Accepted jobsite mockup will be used as project standard.
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Use this article when a special code, regulation, or constructed assembly applies to the Project;
delete this article if none apply. If a UL or Gypsum Association assembly design number is a
requirement of the assembly or construction, include the assembly number in the following
paragraph. UL assemblies are preferred by Code Officials because of third party inspection.
To find fire-rated assemblies online with STC data and details in CAD, Revit® and PDF visit
www.usgdesignstudio.com and click on the “Walls” webpage.
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1.05
PERFORMANCE REQUIREMENTS
A. Conform to applicable code for fire rated assemblies as follows:
1. Fire Rated Partitions: Listed assembly by [UL] [GA File] No. [____].
2. Fire Rated Ceiling and Soffits: Listed assembly by [UL] [GA File] No. [____].
3. Fire Rated Structural Column Framing: Listed assembly by [UL] [GA File] No. [____].
4. Fire Rated Structural Beam Framing: Listed assembly by [UL] [GA File] No. [____].
5. Fire Rated Shaft Wall Requirements: [____] hour in accordance with UL listed assembly
No. ____ [GA File No. ____].
B. Sound Transmission Coefficient for Identified Interior Partitions: [_____] STC in accordance
with ASTM E 90.
C. Shaft Wall: Perform to the following:
1. Air Pressure Within Shaft: [____] pounds per square foot with maximum mid-span
deflection of [____] inches.
2. Sound Transmission Coefficient: [____] STC in accordance with ASTM E90.
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Tall Walls
Partitions exceeding 30 feet in height are considered tall. When these taller than normal partition
heights are required, consideration must be given to length restrictions for manufacturing and
shipping steel studs, scaffolding, stud placement, and deflection.
Use double structural studs back-to-back 24 inches on center. Attach studs back to back with
screws approximately 4 feet on center.
For 5-psf wind load, 20 gauge runner track is recommended. The fasteners should have a capacity
of 300 pounds in single shear and bearing. For 10-psf wind load, 18 gauge runner track attached
with fasteners with 400 pound single shear and bearing is recommended. See metal stud
manufacturer for additional information.
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D. Structural Performance: Provide non-load bearing metal framing capable of withstanding
design loads within limits indicated:
1. Design Loads: [Specify design loads applicable to project requirements.].
2. Deflection Limits: [Specify deflection limits applicable to project requirements.].
3. Vertical Movement: [Specify framing member movement limits applicable to project
requirements.].
4. Interior suspended ceilings and soffits: Maximum deflection of l/360 of distance between
supports.
GYPSUM DRYWALL
09290 / 09 29 00-4
5. Exterior soffits: Withstand minimum positive and negative pressure of [20] [25] [30] psf or
as require by local code authority with maximum deflection of l/360 of distance between
supports.
1.06
DELIVERY, STORAGE, AND HANDLING
A. Comply with provisions in Section 01600 / 01 60 00.
B. Ordering: Comply with manufacturer’s ordering instructions and lead-time requirements to
avoid construction delays.
C. Delivery and Storage of Materials: All materials shall be delivered in their original unopened
packages and stored in an enclosed shelter providing protection from damage and exposure
to the elements. Damaged or deteriorated materials shall be removed from the premises.
Comply with ASTM C1264.
D. Do not allow gypsum sheathing to be exposed to the weather beyond the time period
recommended by the manufacturer.
E. Environmental Conditions:
1. Do not install gypsum board when ambient temperature is below 40°F.
2. In cold weather and during gypsum panel joint finishing, the temperatures within the
building shall be maintained within the range of 55° to 70° F (13° to 21° C). Adequate
ventilation shall be provided to carry off excess moisture. Comply with ASTM C840.
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For Retrofits & Healthcare Requirements with Low-Dust Emissions:
SHEETROCK® Brand Plus 3™ Ready-Mixed Lightweight All Purpose Joint Compound with dust
control.
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F. Warning: Store all gypsum and cement panels flat. The panels are heavy and can roll over,
causing serious injury or death.
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Coordinate length of warranty period with adjacent construction and owner requirements to
obtain unified system warranty. Verify available warranty time periods from available & specified
manufacturers. Edit article below to commensurate with project conditions and/or owner’s
instructions.
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1.07
WARRANTY
A. Comply with provisions in Section 01700 / 01 70 00.
B. Provide glass-mat gypsum sheathing manufacturer’s standard 12-month Warranty against
damage due to weather exposure.
C. Provide glass-mat gypsum sheathing manufacturer’s standard Warranty against all defects in
manufacturing runs for a period of 5 years beginning on the date of installation of the Product
in the building.
D. Provide bead and trim manufacturer’s Lifetime Warranty against edge cracking on vertical
components.
1.08
ALTERNATE CONSTRUCTION WASTE DISPOSAL
A. Reuse:
1. Separate clean waste drywall pieces from contaminants for landfilling or recycling. Do not
include vinyl-faced, mold-resistant or asphalt impregnated gypsum boards. Pulverize and
apply to site soil in accordance to landscape specifications. Protect scrapes and
pulverized material from moisture and contamination. Alternate to on-site soil
amendment, work to supply local farming granular material for their use.
GYPSUM DRYWALL
09290 / 09 29 00-5
B. Recycle:
1. Separate clean waste drywall pieces from contaminants for landfilling or reuse. Working
with local waste hauler and local drywall manufacturer, provide proper storage of waste
for pickup and return. Protect scrapes material from moisture and contamination.
PART 2 PRODUCTS
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Edit list of manufacturers to suit project requirements.
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2.01
MANUFACTURERS
A. A specific product or material manufactured by any of the following listed manufacturers is
"acceptable" (not "approved") only if the specific product or material can evidence exact
compliance with the Contract Documents.
a. Acceptable manufacturer is United States Gypsum Company (USG).
*****OR*****
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Retain paragraph below if substitutions will be allowed.
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2.01
MANUFACTURERS AND PRODUCTS
A. Basis of Design Manufacturer:
1. United States Gypsum Company (USG)
B. Substitutions: Refer to Section 01630
2.02
GYPSUM BOARD
A. General: Provide in thicknesses indicated and maximum lengths as practical to minimize
number of joints.
B. Standard Gypsum Board: ASTM C1396 Section 5 formerly ASTM C36; [1/4] [3/8] [1/2]-inch
thick; 48-inches wide; ends square cut; tapered edges. SHEETROCK® Brand Gypsum
Panels by United States Gypsum Company (USG).
C. Lightweight Gypsum Board: ASTM C1396 Section 5 formerly ASTM C36; lightweight
gypsum wallboard panels with a high strength-to-weight ratio composite design. The
noncombustible core is encased in 100% recycled face and back papers. 1/2 inch thick; 48inches wide; ends square cut; tapered edges. SHEETROCK® Brand UltraLight Gypsum
Panels by United States Gypsum Company (USG). Achieves the following:
1. Meets or exceeds ASTM C-1396 specifications for 1/2" gypsum wallboard and 1/2"
gypsum ceiling board.
2. Complies with the requirements of the International Building Code and International
Residential Code as both regular wallboard and ceiling board.
D. Lightweight “Non-Type X” Gypsum Board: Material Quality Standard: ASTM C 1396 / C
1396M, Non-Type X, Section 5: UL Design U407 classified as to fire resistance—30-minute
and 1-hour fire-rated walls Noncombustible fire resistant gypsum core, with additives to
enhance fire resistance and weighting from 1.6 to 1.7 pounds per square foot with paper
surfacing on face, back, and long edges; tapered long edges; 5/8 inch thick; 48-inches wide;
ends square cut; tapered edges. Product identification: “Non-Type X” will be printed in field
of the panel 12 – 15 inches in from edge to identify it. Sheetrock Brand UltraLight Firecode
30 Core Gypsum Panels by United States Gypsum Company (USG).
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GYPSUM DRYWALL
09290 / 09 29 00-6
There are two (2) different types of fire rated gypsum cores. Both cores meet the specifications of
ASTM C 36 and type X; however, the FIRECODE “C” core is used in several tested assemblies
because of its superior ability to resist fire and gravity. To specify these assemblies, it will be
necessary to note the “C” core in your specifications. Type “C” Core is normally used in firerated ceiling applications. Type “X” Core normally requires 2 layers to achieve a fire-rating in a
ceiling assembly.
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E. Lightweight “Type X” Gypsum Board: Material Quality Standard: ASTM C 1396 / C 1396M,
Non-Type X, Section 5: UL classified as to fire resistance. UL designation “Type ULX”. Not
for use in beam fire-rated designs. Use in fire-rated ceilings is limited to UL Design No. L559.
Noncombustible fire resistant gypsum core, with additives to enhance fire resistance and
weighting from 1.9 pounds per square foot with paper surfacing on face, back, and long
edges; tapered long edges; 5/8 inch thick; 48-inches wide; ends square cut; tapered edges.
Sheetrock Brand UltraLight Firecode X Core Gypsum Panels by United States Gypsum
Company (USG).
F. Fire Rated Gypsum Board: ASTM C1396 Section 5 formerly ASTM C36; Type X, fire
resistive core, UL rated; 5/8-inch thick; 48-inches wide; ends square cut; tapered edges.
SHEETROCK® Brand FIRECODE Gypsum Panels by United States Gypsum Company
(USG).
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Type “C” cores are more fire resistant than type “X”. A 1/2-inch type “C” panel can be substituted
for a 5/8-inch type “X”. The 3/4-inch type “C” panel (ULTRACODE) can eliminate a layer of 5/8inch type “X”. When a type “C” core is listed in the fire test assembly, it must be used to obtain
the fire rating.
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G. Special Core Fire Rated Gypsum Board: ASTM C1396 Section 5 formerly ASTM C36; Type
“C” fire resistive core; [1/2] [5/8] [3/4]-inch thick as required to meet UL or WHI fire test
assemblies detailed or specified; 48-inches wide; ends square cut; tapered edges.
SHEETROCK® Brand [FIRECODE “C”] [ULTRACODE (3/4”)] Panels by United States
Gypsum Company (USG).
H. Mold and Moisture Resistant Gypsum Board: ASTM C1396 Section 5 formerly ASTM C36
and Section 7 formerly ASTM C476; 5/8” inch thick is Type X UL Classified for fire-resistive,
proprietary treated mold and moisture resistant, noncombustible gypsum core, with mold and
moisture resistant paper surfacing on face, back and long edges; tapered long edges; [1/2]
[5/8] [3/4] inch thick; resistant to mold and mildew growth with a score of not less than 10
when tested according to ASTM D3273. SHEETROCK® Brand Mold Tough™ Gypsum
Panels by United States Gypsum Company (USG).
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ASTM C1629 standard establishes classifications of abuse resistance based on minimum abuseresistance performance of nondecorated interior gypsum panel products and fiber-reinforced
cement panels (abuse resistant wall panels).
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I. Fire Rated Abuse-Resistant Gypsum Board: ASTM C1629; ASTM C1396 Section 5 formerly
ASTM C36; Type X, fire resistive core, UL rated; 5/8-inch thick; 48-inches wide; ends square
cut; tapered edges; designed and tested to offer greater resistance to surface indentation and
through penetration than standard gypsum panels. SHEETROCK® Brand Abuse Resistant
FIRECODE® Gypsum Panels by United States Gypsum Company (USG).
1. Achieving the following minimum test results per ASTM C1629:
a. Surface abrasion: Level 2 (With standard primer and 2 coats of finish paint: Level 3)
b. Surface indentation: Level 2
c. Soft Body Impact: Level 2
d. Hard Body Impact: Level 1
GYPSUM DRYWALL
09290 / 09 29 00-7
J.
Fire Rated Abuse, Mold and Moisture-Resistant Gypsum Board: ASTM C1629; ASTM
C1396 Section 5 formerly ASTM C36; and Section 7 formerly ASTM C476; 5/8” inch thick is
Type X UL Classified for fire-resistive, proprietary treated mold and moisture resistant,
noncombustible gypsum core, with mold and moisture resistant paper surfacing on face, back
and long edges; tapered long edges; [1/2] [5/8] [3/4] inch thick; designed and tested to offer
greater resistance to surface indentation and through penetration than standard gypsum
panels; resistant to mold and mildew growth with a score of not less than 10 when tested
according to ASTM D3273. SHEETROCK® Brand Mold Tough™ AR FIRECODE® Gypsum
Panels by United States Gypsum Company (USG).
1. Achieving the following minimum test results per ASTM C1629:
a. Surface abrasion: Level 2 (With standard primer and 2 coats of finish paint: Level 3)
b. Surface indentation: Level 3
c. Soft Body Impact: Level 3
d. Hard Body Impact: Level 3
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Fiber-reinforced gypsum panels are used in areas that need abuse resistance. Because of the
dense –hard core, it is necessary to install these panels on 20 gauge studs to prevent “screw
spin-out” of thinner gauges. They can be used in areas that normally would have cement block
but need the chase cavity and lightweight construction of drywall. They can be finished and
decorated the same as drywall. The Type “FRX-G” panels can be substituted for Type “X” panels.
Abuse Resistant (AR) panels do not have fiberglass reinforcing mesh on the back. Very High
Impact (VHI) panels have the reinforcing fiberglass mesh on the backside of the panel.
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H. Fiber-Reinforced, Abuse-resistant, Water-resistant, Mold-resistant, and Fire-Rated Gypsum
Panel: ASTM C1629; ASTM C1278; meets or exceeds ASTM C1396 and ASTM C1178; Fire
resistant Type “FRX-G” as listed in UL; 5/8-inch thick; 48-inches wide; homogeneous
composition of gypsum and cellulose fiber core; surfaces and core treated with waterresistant additive; without face or back paper; ends square cut; tapered edges. FIBEROCK ®
Brand AQUA-TOUGH™ Interior Panels by United States Gypsum Company (USG).
Achieving the following minimum test results:
1. Flexural strength: <155 lbf, when tested per ASTM C473.
2. Compressive strength: <500 psi.
3. Nail-pull resistance of 145 lbs. force when tested per ASTM C473.
4. Achieving the following minimum test results per ASTM C1629:
a. Surface abrasion: Level 1 (With standard primer and 2 coats of finish paint: Level 3)
b. Surface indentation: Level 1
c. Soft Body Impact: Level 2
d. Hard Body Impact: Level 1
5. ASTM E84: Flame Spread 5, Smoke Developed 0 (both faces of panel).
6. ASTM D3273: Achieves the highest score possible of 10 for no mold growth.
I. Fiber-Reinforced, Impact-resistant, and Fire-Rated Gypsum Panel: ASTM C1629; ASTM
C1278; meets or exceeds ASTM C1396 and ASTM C1178; Fire resistant Type “FRX-G” as
listed in UL; 5/8-inch thick; 48-inches wide; homogeneous composition of gypsum and
cellulose fiber core; surfaces and core treated with water-resistant additive; without face or
back paper; ends square cut; tapered edges. FIBEROCK® Brand VHI Abuse-Resistant
Panels by United States Gypsum Company (USG). Achieving the following minimum test
results:
1. Flexural strength: <155 lbf, when tested per ASTM C473.
2. Compressive strength: <500 psi.
3. Nail-pull resistance of 145 lbs. force when tested per ASTM C473.
4. Achieving the following minimum test results per ASTM C1629:
a. Surface abrasion: Level 1 (With standard primer and 2 coats of finish paint: Level 3)
b. Surface indentation: Level 1
c. Soft Body Impact: Level 3
d. Hard Body Impact: Level 3
GYPSUM DRYWALL
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5. ASTM E84: Flame Spread 5, Smoke Developed 0 (both faces of panel).
6. ASTM D3273: Achieves the highest score possible of 10 for no mold growth.
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The Water-Resistant Gypsum Board product s are not available any longer. Please see the Mold &
Moisture category.
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J.
Moisture and Mold Resistant Gypsum Board: ASTM C1396 Section 7 formerly ASTM C630;
[Standard] [C Core] [Type X] [fire resistive core, UL rated], [1/2] [5/8]-inch thick; 48-inches
wide; proprietary treated mold and moisture resistant, noncombustible gypsum core, with
mold and moisture resistant paper surfacing on face, back and long edges; ends square cut;
tapered edges. SHEETROCK® Brand Mold Tough™ [FIRECODE®] [C Core] [Type X]
Gypsum Panels by United States Gypsum Company (USG). Achieves the highest score
possible of 10 for no mold growth per ASTM D3273
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To prevent objectionable sag in water-based textured gypsum ceilings, install the ceiling
insulation after texturing and ceilings have dried. Recommended maximum framing spacing
should not exceed 16" o.c. for 1/2" panels and 24" o.c. for 5/8" panels. 1/2” interior gypsum
ceiling panels have the same framing specifications as 5/8”.
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L. Interior Gypsum Ceiling Board: ASTM C1396 Section 12 formerly ASTM C931; Standard
1/2-inch thick; 48-inches wide; sag resistant core; ends square cut; tapered edges.
Recognized by NER 458 code compliance. SHEETROCK® Brand Interior Gypsum Ceiling
Panels by United States Gypsum Company (USG).
K. Exterior Gypsum Soffit Board: ASTM C931/C931M; [Standard] [C Core] [Type X] [fire
resistive core, UL rated], [1/2] [5/8]-inch thick; 48-inches wide; weather & sag resistant core;
black water repellent back paper; ends square cut; tapered edges. SHEETROCK ® Brand
Exterior Gypsum Ceiling [FIRECODE®] [C Core] [Type X] Panels by United States Gypsum
Company (USG).
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1/2” gypsum sheathing is available with Tongue and Grooved (T&G) edges in 24” widths. 48”
widths are available with square edges. 5/8” is normally available in 48” widths only with square
edges. Please note that the warranty on gypsum sheathing only allows for:
 30 days exposure to the weather.
 Must be covered with a weather-resistant barrier (#15 felt or equivalent).
 Exterior Finish Systems must be applied with mechanical fasteners through the framing
into the wall framing. Alternative methods of application are not endorsed and their
performance and that of the substrate are solely the responsibility of the Specifier. Direct
application of paint, texture finishes and coatings over gypsum sheathing are not
recommended.
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M. Gypsum Sheathing Board: ASTM C1396 Section 9 formerly ASTM C79; [Standard 1/2-inch
thick, 24-inches wide with V-shaped tongue and grooved edges] [Type X, fire resistive core,
UL rated, 5/8-inch thick, 48-inches wide with tapered edges]; water-resistant core; ends
square cut; black water repellent paper on both faces and edges. SHEETROCK® Brand
[FIRECODE®] Gypsum Sheathing Panels by United States Gypsum Company (USG).
N. Glass-Mat Gypsum Sheathing: ASTM C1177; [Standard 1/2-inch thick] [Fire resistant Type
“X” as listed in UL 5/8-inch thick] UL designation USGX; 48-inches wide with square edges;
ends square cut; mold and water-resistant treated gypsum core combined with fiberglass mat
face and back. 1/2” [5/8”] SECUROCK™ Glass-Mat [FIRECODE®] Gypsum Sheathing
GYPSUM DRYWALL
09290 / 09 29 00-9
Panels by United States Gypsum Company (USG). Achieving the following minimum test
results:
1. 5/8” panel shall achieve Ultimate Load of 321 psf with horizontal application and framing
at 12” o.c. and with fastener spacing 4 inches o.c. around perimeter and 4 inches o.c. in
the field.
2. Shall exceed 15 psi flatwise tensile bond capacity required for adhesively attached EIFS;
tested in accordance with ASTM C 297 in laboratory conditions.
3. Shall achieve the highest score possible of 10 for no mold growth per ASTM D3273.
************************************************************************************************************************
Foil-backed gypsum board is not recommended as a base for ceramic or other tile or as a base
layer for vinyl-faced gypsum panels or other highly moisture-resistant wall coverings. Also not to
be used in hot, humid climates such as the Southern Atlantic and Gulf Coast areas. Not available
in Moisture and Mold Resistant panels. Not available in all markets.
************************************************************************************************************************
O. Foil Backed Gypsum Board: ASTM C36, ASTM E96; [Standard 3/8-inch] [Standard 1/2-inch]
[Fire resistant Type “C” as listed in UL 1/2-inch] [Fire resistant Type “C” as listed in UL 5/8inch thick] [Fire resistant Type “X” as listed in UL 5/8-inch thick]; back surface laminated with
kraft-backed aluminum foil; ends square cut; [tapered] [beveled] [square] [round] edges. In
tests per ASTM E96 (desiccant method), 1/2-inch thick panels show a vapor permeance of
0.06 perms. FOIL-BACKED SHEETROCK® Brand [FIRECODE®] [FIRECODE® "C"] Gypsum
Panels by United States Gypsum Company (USG).
P. Gypsum Coreboard: ASTM C1396 Section 6 formerly ASTM C442; 1-inch thick; 24-inches
wide; encased in a strong, gray paper; prescored 6-inches to 8-inches o.c.; ends square cut;
[V-shaped tongue and grooved] [square] edges. SHEETROCK® Brand Gypsum Coreboard
by United States Gypsum Company (USG).
************************************************************************************************************************
USG Liner Panels have been tested for fire resistance, structural performance and sound control only
when used with SHEETROCK shaft wall and area separation wall framing component. All SHEETROCK
shaft wall and area separation wall system components must be used together to ensure superior system
performance and safety. Substitutions of any components are not recommended and are not endorsed by
the United States Gypsum Company.
USG Shaft Wall System is the only wall for which a UL smoke and fire damper test is available.
************************************************************************************************************************
Q. Gypsum Liner Panels: ASTM C1396 Section 6 formerly ASTM C442; Fire resistant core; 1inch thick; 24-inches wide; multi-layered water-resistant green paper facings; ends square
cut; beveled edges. SHEETROCK® Brand Gypsum Liner Panels by United States Gypsum
Company (USG).
R. Gypsum Liner Panels - Enhanced: ASTM C1396 Section 6 and Section 7 formerly ASTM
C442 and ASTM C473; Fire, moisture and mold resistant core; 1-inch thick; 24-inches wide;
ends square cut; beveled edges; multi-layered moisture-resistant, mold and mildew resistant
blue paper facings with a score of not less than 10 when tested according to ASTM D3273.
SHEETROCK® Brand Mold Tough ™Gypsum Liner Panels by United States Gypsum
Company (USG).
S. Gypsum Liner Panels – Glass-mat: ASTM C1177 section 5.2.5 for water resistance; Fire,
moisture and mold resistant core; 1-inch thick; 24-inches wide; ends square cut; beveled
edges; moisture-resistant, mold and mildew resistant glass-mat facings with a score of not
less than 10 when tested according to ASTM D3273. SHEETROCK® Glass-Mat Liner Panels
by United States Gypsum Company (USG).
2.03
CEMENT BOARD
************************************************************************************************************************
GYPSUM DRYWALL
09290 / 09 29 00-10
Because of the dense –hard core, it is necessary to install cement panels on 20 gauge (0.0312
inches) studs to prevent “screw spin-out” of thinner gauges.
DUROCK Cement Board is vapor permeable and does not deteriorate in the presence of water. It
is used as a substrate for tile or veneer plaster. If a vapor retarder or waterproof construction is
specified, a separate barrier must be applied over or behind DUROCK Cement Board.
Cement board is NOT a Type X panel. It requires a gypsum board or mineral fiber insulation in the
assembly to achieve the fire-rating.
************************************************************************************************************************
A. General: ANSI A108.11, ANSI A118.9, ASTM C1186, ASTM D2394, ASTM E136; Provide
panels in [1/2-inch thick] [5/8-inch thick] [thickness as indicated] maximum width and length
available to eliminate joints with a core of non-asbestos aggregated portland cement and a
poly-coated, glass-fiber mesh embedded completely encompassing smooth formed edges;
ends square cut; dual surface - smooth side for mastic application and rough side for mortar
applications. Tested in accordance with ASTM E84 - Surface Burning Characteristics - flame
spread 5, smoke developed 0; Noncombustible. DUROCK® Multi-Purpose Cement Board by
United States Gypsum Company (USG).
1. Achieving the following minimum test results:
a. Nail pull capacity must exceed 125 pounds when tested per ASTM C473.
b. Indentation strength capacity must meet or exceed 2300 psi when tested per ASTM
D2394.
2.04
ACOUSTICAL SEALANT
A. General: ASTM C834, ASTM C919; Highly elastic, non-bleeding, and staining, water-based
caulking to provide permanent flexibility and lasting seal. Tested in accordance with ASTM
E84 - Surface Burning Characteristics - flame spread 0, smoke developed 0. SHEETROCK®
Acoustical Sealant by United States Gypsum Company (USG).
************************************************************************************************************************
When a mineral fiber batt is listed in test assemblies, glass fiber batts cannot be substituted
without voiding the fire or sound results unless it is optional.
************************************************************************************************************************
2.05
SOUND ATTENUATION BLANKETS
A. General: ASTM C665 - Unfaced mineral-fiber blanket insulation produced by combining slag
mineral fibers with thermosetting resins to comply with ASTM C665 for Type 1 (blankets
without membrane facing). Provide products as listed in the fire and sound rating assemblies
required for this project, U. L. - labeled. Tested in accordance with ASTM E84 - Surface
Burning Characteristics - flame spread 15, smoke developed 0. Minimum 2.5 lbs nominal
density per pcf when tested according to ASTM E126.
2.06
TRIM ACCESSORIES
A. General: ASTM C1047 - Rust-resistant steel reinforcing components with strong paper tape
factory laminated to its surface to provide superior adhesion of joint compound, textures and
paints while reducing edge cracking, chipping and rusting of drywall trim edges and corners
with bead and trim manufacturer’s Lifetime Warranty against edge cracking on vertical
components. Provide “nose coating” on paper tape to resist scuffing and fuzzing from knives
and sanding.
B. Products: SHEETROCK® Paper Faced Metal Drywall Bead & Trim by United States Gypsum
Company (USG).
1. Outside Corner Bead: B1W, B1XW, B1XW EL or Micro Bead
2. Offset Outside Corner: B1 OS
3. Inside Corner Bead: B2
GYPSUM DRYWALL
09290 / 09 29 00-11
4.
5.
6.
7.
8.
9.
Offset Inside Corner: B2 OS
L-Bead: B4 (3/8", 1/2" or 5/8")
Revel: SL (1/2" or 5/8")
Bullnose Outside Corner Bead: SLOC
Bullnose Offset Outside Corner Bead: SLOC OS
Cove Inside Corner: SLIC
C. Control Joint: [Extruded vinyl] [Bent zinc sheet] formed with V shaped slot, covered with
removable strip, perorated flanges and complying with ASTM C1047.
2.07
JOINT TREATMENT MATERIALS
A. General: ASTM C475, GA-214 Levels of Finish - Provide joint treatment materials as listed in
the fire rating assemblies required for this project and produced by the gypsum board
manufacturer to obtain complete unit responsibility of the rated assemblies.
B. OSHA Compliance: Provide testing data that joint treatment materials do not exceed the
OSHA Final Rule Limit - Estimated Time-Weighted Average Exposure.
C. Products: SHEETROCK® Joint Treatment Materials by United States Gypsum Company
(USG).
1. Non-asbestos Vinyl-based Joint Compounds Ready-Mixed: SHEETROCK® All Purpose
2. Non-asbestos Perlite Formula Vinyl-based Joint Compounds Ready-Mixed:
SHEETROCK® Plus 3™ Ready-Mixed Lightweight All Purpose Joint Compound
SHEETROCK® Plus 3™ Ready-Mixed Lightweight All Purpose Joint Compound with dust
control.
3. Setting-Type Joint Compounds: SHEETROCK® Setting-Type (Durabond™)
4. Perlite Formula Setting-Type Joint Compounds: SHEETROCK® Lightweight Setting-Type
(Easy Sand™).
5. Paper Tape: SHEETROCK® Joint Tape (Heavy) - ASTM C475 Labeled.
6. Paper Tape: SHEETROCK® Joint Tape (Regular)
************************************************************************************************************************
Do not use drying type compounds with fiberglass tape.
************************************************************************************************************************
7. Fiberglass Tape: SHEETROCK® Fiberglass Drywall Tape
************************************************************************************************************************
Drywall primers are not the same as paint primers. Paint primers will not equalize the porosity of
the gypsum paper and joint treatment. Drywall primers are applied prior to texturing the wall.
This makes the suction of the joint compound equal to the face paper of the gypsum board and
avoids joint flashing when the texture is applied.
************************************************************************************************************************
2.08
DRYWALL PRIMER
A. General: Provide a flat latex vinyl acrylic primer with calcium carbonate fillers to equalize
both the porosity and surface texture differences of the drywall and joint treatment to provide
greater uniformity of the texture and finish coat. Minimum Specific Gravity of primer shall not
be less than 1.26. SHEETROCK® First Coat by United States Gypsum Company (USG).
*********************************************************************************************
A drywall primer-surfacer is a dual-purpose vinyl acrylic latex-based coating designed especially
for interior application over new drywall. In a single spray application it provides the same results
achieved using a typical two-step process of skim coating surfaces with joint compound followed
by a coat of drywall primer. In a GA-214/ASTM C-840 Level 5 gypsum board finish, the drywall
primer-surfacer is used in lieu of a skim coat of joint compound and paint primer coat to provide
the highest quality drywall finish.
*********************************************************************************************
2.09
DRYWALL PRIMER-SURFACER
GYPSUM DRYWALL
09290 / 09 29 00-12
A. Primer-Surfacer: Finish Level 4 (GA-214 / ASTM C840) drywall surface with vinyl acrylic
latex-based coating to achieve Level 5 gypsum board finish. SHEETROCK® Brand PrimerSurfacer, TUFF-HIDE™ by United States Gypsum Company. Achieving the following test
results:
Tested for abrasion resistance, passing 1000 cycles, in accordance with ASTM D4977
(modified).
Tested for scrubbability. Passing 2000 cycles, in accordance with ASTM D2486
(scrubbability).
************************************************************************************************************************
To prevent objectionable sag in water-based textured gypsum ceilings, install the ceiling
insulation after texturing and ceilings have dried. Recommended maximum frame spacing should
not exceed 16" o.c. for 1/2" panels and 24" o.c. for 5/8" panels except for 1/2” Interior Gypsum
Ceiling Panels.
************************************************************************************************************************
2.10
TEXTURE FINISH MATERIALS
A. General: Provide non-asbestos factory packaged powder or ready-mixed product formulated
for spray application, with Surface Burning Characteristics meeting O-25 range to classify as
Class I (Class A). SHEETROCK® Spray Texture Finishes by United States Gypsum
Company (USG) as selected by Architect.
2.11
DRYWALL METAL FRAMING
A. Metal Studs and Tracks: ASTM A1003, ASTM C645, GA-216, GA-600; Provide gauge and
sizes as shown and meeting fire-rated partition assembly metal framing requirements, hotdipped galvanized sheet steel, minimum [0.0188] [0.0283] [0.0312] inch thick, metal framing
components cold roll formed into “C” and channel shapes with knurled faces from sheet steel
slit from master coils of galvanized steel in lengths and widths to meet Limiting Height criteria
of the local code with a Allowable Deflection of [L/120] [L/240] [L/360].
1. Section Properties: [Specify required area, moment of inertia, section modulus and radius
of gyration applicable to project requirements.]
B. Equivalent (knurled studs) Metal Studs and Track - Provide gauge and sizes as shown
and meeting fire-rated assembly metal framing requirements, hot-dipped galvanized
sheet steel, minimum [0.0150”] [0.0250”] [0.0280”] inch thick, metal , metal framing
components cold roll formed into “C” and channel shapes with knurled faces from
sheet steel slit from master coils of galvanized steel in lengths and widths to meet
Limiting Height criteria of the local code with a Allowable Deflection of [L/120] [L/240]
[L/360].
C. Metal Furring Channels: ASTM A1003, ASTM C645, GA-216; Provide hat shaped channel
7/8” high x 2-11/16” wide galvanized sheet steel, minimum [0.0188] [0.0283] [0.0312] inch
thick, metal framing components cold roll formed with knurled faces.
D. Resilient Furring Channels: ASTM A1003, ASTM C645, GA-216; Provide hat shaped
channel with a single flange to form a resilient leg, 1/2” high x 2-1/2” wide galvanized sheet
steel, minimum 0.0179-inch thick, metal framing component cold roll formed with knurled
face.
E. Z Furring Channels: ASTM A1003, ASTM C645, GA-216; Provide Z shaped channels with a
nonslotted web, galvanized sheet steel, minimum 0.0179-inch thick, 7/8-inch attachment
flange [with a 1-inch depth] [with a 1 1/2-inch depth] [with a 2-inch depth] [and of depth
required for insulation thickness], metal framing component cold roll formed with knurled
faces.
F. Cold-Rolled Channels: ASTM A1003, ASTM C645, GA-216; Provide U shaped channels,
painted or galvanized sheet steel, minimum 0.054-inch thick, [3/4-inch] [1 1/2-inches] [2inches] deep, metal framing component cold roll formed.
GYPSUM DRYWALL
09290 / 09 29 00-13
G. Fasteners: ASTM C1002, GA-216; Provide fasteners of type, material, size, sufficient holding
power, galvanized, plated or oil-phosphate coated as required for needed corrosion
resistance and other properties required to fasten steel framing and furring securely to
substrates involved; per the current recommendations of manufacturers for applications
indicated.
3.4
SHAFT WALL SYSTEM (Proprietary Systems)
A. Non-load-bearing gypsum board partition assemblies designed for erection from outside of
the shaft at each floor with an engineered C-H stud system for progressive installation of liner
panels. Assemblies are covered by three model-building codes under NER 258. Where
applicable, installed system must conform to Underwriters Laboratories, Inc. (UL) Fire
Resistance Design No. [U415 for 1-3 hour rated assemblies] [U408 for 4 hour assembly] and
other applicable codes.
B. C-H Studs: ASTM A446, ASTM A525, ASTM C645, ASTM C754; Provide C-H shaped studs
with 1-inch dia. holes 16-inches from each end, galvanized sheet steel, minimum [0.0188]
[0.0239] [0.0310] [0.0359] thick with a 1 1/2-inch knurled face, metal framing component cold
roll formed from sheet steel slit from master coils of galvanized steel in lengths and widths to
meet Limiting Height criteria of the local code with a Allowable Deflection of [L/120] [L/240]
[L/360] at an intermittent air pressure load (wind load) – psf of [5] [7.5] [10] [15].
C. E-Studs: ASTM A446, ASTM A525, ASTM C645, ASTM C754; Provide E shaped studs,
galvanized sheet steel, minimum [0.0188] [0.0359] thick with a 1-inch knurled face, metal
framing component cold roll formed from sheet steel slit from master coils of galvanized steel
in lengths and widths to meet Limiting Height criteria of the local code with a Allowable
Deflection of [L/120] [L/240] [L/360] at an intermittent air pressure load (wind load) – psf of [5]
[7.5] [10] [15].
D. J-Runners: ASTM A446, ASTM A525, ASTM C645, ASTM C754; Provide J shaped runners,
galvanized sheet steel, minimum [0.0239] [0.0359] thick with a 1-inch face leg and a 2-inch
back leg, metal framing component cold roll formed from sheet steel slit from master coils of
galvanized steel in lengths and widths to meet Limiting Height criteria of the local code with a
Allowable Deflection of [L/120] [L/240] [L/360] at an intermittent air pressure load (wind load)
– psf of [5] [7.5] [10] [15].
E. Strut: ASTM A446, ASTM A525, ASTM C645, ASTM C754; Provide J shaped runners,
galvanized sheet steel, minimum 0.0359 thick with a 1-inch face leg and a 3-inch back leg,
metal framing component cold roll formed from sheet steel slit from master coils of galvanized
steel in lengths and widths to meet Limiting Height criteria of the local code with a Allowable
Deflection of [L/120] [L/240] [L/360] at an intermittent air pressure load (wind load) – psf of [5]
[7.5] [10] [15].
2.12
DRYWALL SUSPENSION SYSTEM
A. Pre-engineered drywall suspension system consisting of straight main tees along with
straight furring cross channels or cross tees, that join together to support screw attached
gypsum panels and independently supported light fixtures, and air diffusers, where
applicable. Where applicable, installed system must conform to Underwriters Laboratories,
Inc. (UL) Fire Resistance Design No. [____] and other applicable codes.
1. USG Flat Drywall Suspension Systems:
a. Main Tees: Fire-Rated Heavy Duty classification 1-1/2" high x 144" long, integral
reversible splice with knurled face. DGL26 15/16" Face or DGLW-26 1-1/2" Face.
b. Cross Tees: DGLW-424 cross tee 1-1/2" high x48" long with 1-1/2" wide face. Tees
must have quick release cross tee ends to provide positive locking and remove ability
without the need for tools.
OR
c. Furring Channel: DGCL-4 furring channel 7/8" high x 48" long with 1-1/2 face.
GYPSUM DRYWALL
09290 / 09 29 00-14
d. Accessory Cross Tees: Cross tees must have knurled faces. Cross tees must have
quick release cross tee ends to provide positive locking and remove ability without
the need for tools.
DGL-224 Fire-Rated
1-1/2" high x 24" long with 15/16" face.
DGL-324-Fire-Rated
1-1/2" high x 36" long with 15/16" face
DGL-424 Fire-Rated
1-1/2" high x 48" long with 15/16" face
DGL-824 Non-Fire-Rated 1-1/2" high x 96" long with 15/16" face
DGLW-224 Fire-Rated
1-1/2" high x 24" long with 1/2" face
DGLW-424 Fire-Rated
1-1/2" high x 48" long with 1/2" face
e. Wall moldings: Single web with knurled face:
DGM-16
1”X1”X144" long wall molding
DGM-25
144”X1-9/16”X1”X1" channel molding
f. Accessories:
ii. Transition Clip DGTC-90
iii. Splice Clip DGSC-180
iv. Hanger wire: Galvanized carbon steel, soft temper, prestretched, yield-stress
load at least three times design load but not less than 12 gauge.
B. Engineered drywall suspension system consisting of curved main tees along with straight
furring cross channels or cross tees, that join together to support screw attached gypsum
panels and independently supported light fixtures, and air diffusers, where applicable. Go to
the USG Website and use the USG Drywall Suspension System Estimating Wizard to quickly
generate a bill of materials needed for the job, installation details and instructions.
1. USG Curved, Domed and Vaulted Drywall Suspension Systems:
2. Main Tees: Custom Curved Heavy Duty classification 1-1/2” high x 144” long, integral
reversible splice with knurled face. DGWVT or DGWVY
3. Cross Tees: Select from subparagraph A.1.d. items above.
C. COMPASSO™ [Standard] [Elite] [Slim] Metal Suspension System Trim for Drywall/Plaster
Ceiling.
1. [2-1/4”] [4”] [6"] [8”] [10”] [12”] high COMPASSO trim, 9/16" face flanges with hems
formed for attachment to the COMPASSO mounting clip; commercial quality cold-rolled
steel or extruded aluminum, factory finished in baked enamel paint finish in [_____] color.
2. Splice plate: steel in finish to match trim pans; formed for snap-fit into 6" pans ends.
3. Attachment clips: hot-dipped galvanized steel in (galvanized finish) (finish to match pans)
formed to snap-fit into 6" pan and attached to Donn DX/DXL suspension system
members.
4. 90° corner trim pieces: to match COMPASSO trim.
PART 3 EXECUTION
3.01
INSPECTION
A.
B.
C.
D.
Examine conditions and proceed with work in accordance with Section 01400.
Provide written report of unacceptable conditions.
Do not start work until unsatisfactory conditions are corrected.
Work to be concealed: Verify that work above ceiling suspension system and inside
partitions are complete and installed in a manner which will not affect layout and installation
of drywall systems.
E. Beginning of installation shall signify acceptance of conditions.
F. Fire-rating requirements: Construction above fire-rated assembly shall meet requirements as
applicable to provide fire-rating as described in Part 2 PRODUCTS.
3.02
PREPARATION
A. Field dimensions must be verified prior to installation.
GYPSUM DRYWALL
09290 / 09 29 00-15
B. Coordinate installation to ensure that proper construction sequence is followed. Coordinate
with other work supported by or penetrating through the ceiling, including mechanical and
electrical work and partition systems.
C. Mechanical work: Ductwork above system shall be complete and permanent HVAC systems
operating.
D. Electrical Work: Installation of conduit above suspension system shall be complete before
installation of suspension system.
************************************************************************************************************************
Drywall framing installation recommendations are available from the various manufacturers and
the design capacities of fasteners should comply with their recommendations. As drywall or
other sheathing products could at some time be removed or damaged, horizontal bridging for
lateral stability of the framing system for tall partitions should be used at all times.
************************************************************************************************************************
3.03
METAL STUD INSTALLATION
A. General:
1. Install studs in accordance with [ASTM C 754] [GA-216] [and GA-600].
************************************************************************************************************************
If the ceiling CAC is less than 50, it is not beneficial to build a partition 6-inches past the ceiling. If
a 50 STC or greater partition is needed, the wall must extend to the deck to achieve the 50 STC.
Otherwise, it is only necessary to attach to the suspended ceiling.
************************************************************************************************************************
2. Extend framing to underside of [suspended ceiling] [underside of deck or roof] [as shown
on drawings].
3. Use Head-of Wall or Roof Assembly (Slip Track) UL System number [HW-D-0001] [HWD-0002] [HW-D-0009] for partitions that extend to the deck or roof.
4. Erect framing and panels plumb, level and square in strict accordance with approved
drawings.
5. Attach steel track at floor and ceiling to structural elements with suitable fasteners 2inches from each end and spaced 24-inches o.c. To suspended ceilings, use toggle bolts
or hollow anchors spaced 16-inches o.c.
6. Install concrete anchors only after full compressive strength has been achieved.
7. Butt all track joints. Securely anchor abutting pieces of track to a common structural
element, or splice them together.
8. Align and plumb studs vertically with the open side facing the same direction, and
securely engaging with the flanges or webs of both upper and lower tracks at [16-inches]
[24-inches] o.c. When necessary, splice studs with a minimum 8-inch nested lap and two
positive attachments per stud.
9. Attach wall stud bridging in a manner to prevent stud rotation.
10. Place studs in direct contact with all doorframe jambs, abutting partitions, partition
corners, and existing construction elements.
11. Provide temporary bracing until erection is completed.
12. Where studs are installed directly against exterior walls and a possibility of water
penetration through walls exists, install asphalt felt strips between studs and wall
surfaces.
13. Securely anchor all studs for shelf-walls and those adjacent to door or window frames,
partition intersections, corners, and freestanding furring to ceiling and floor track.
14. Securely anchor studs to jamb and head anchors of door and borrowed-light frames by
bolt or screw attachment. Over metal door and borrowed-light frames, place horizontally
a cut-to-length section of track, with a web-flange bend at each end, and secure to strutstuds with two screws in each bent web. Position a cut-to-length stud (extending to
ceiling track) at vertical panel joints over doorframe header. When attaching studs to
ceiling grid system, structural adequacy of the grid to support end reaction of wall must
be determined.
GYPSUM DRYWALL
09290 / 09 29 00-16
15. Where indicated in the drawings, provide for structural vertical movement using means in
accordance with manufacturer’s recommendations.
16. Provide provision for structure vertical movement where indicated on drawings.
************************************************************************************************************************
On some projects, resilient channels installed incorrectly upside down. The open face should be
towards the ceiling. Also, some installers use 1-1/4” screws that attached the open end to the
stud negating the STC improvement by the resilient channel. The resilient channel needs to be
flexible. The panels must be installed with 1” screws.
************************************************************************************************************************
B. Resilient Channel Erection:
1. Position Resilient Channel at right angles to steel studs, space [16-inches] [24-inches]
o.c. and attach to stud flanges with pan head framing screws driven through holes in
channel mounting flange.
2. Install channels with mounting flange down. (Channel may be inverted at floor to
accommodate attachment of base.)
3. Locate channels 2-inches from floor and 6-inches from ceiling.
4. Extend channels into all corners and attach to corner framing.
5. Cantilever channel ends no more than 6-inches.
6. Splice channel by nesting directly over stud; screw-attach through both flanges.
Reinforce with screws located at both ends of splice.
3.4
SHAFTWALL SYSTEM INSTALLATION (Proprietary Systems)
A. Studs and Liner Panels installation:
1. Position steel runners at floor and ceiling with the short leg toward finish side of wall.
2. Securely attach runners to structural support with power driven fasteners at both ends
and max. 24-inches o.c.
3. With steel frame construction, install floor and ceiling runners and J-Runners or E-Studs
on columns and beams before steel is fireproofed. Remove spray fireproofing from
runners and E-Suds before installing gypsum liner panels (2-hour steel fireproofing).
4. For other structural steel fireproofing requirements, use Z-shaped standoff clips secured
to structural steel before fireproofing application.
5. Cut liner panels 1-inch less than floor-to-ceiling height and erect vertically between JRunners.
6. Where shaft walls exceed maximum available panel height, position liner panel end joints
within upper and lower third points of wall. Stagger joints top and bottom in adjacent
panels.
7. Screw studs to runner on walls that exceed 16-feet.
8. Use steel C-H Studs 3/8-inch to not more than 1/2-inch less than floor-to-ceiling height,
and install between liner panels with liner inserted in the groove.
9. Install full-length steel E-Studs or J-Runners vertically at T -intersections, corners,
doorjambs, and columns.
10. Install full-Iength E-Studs over gypsum liner panels both sides of closure panels.
11. For openings, frame with vertical E-Stud or J-Runner at edges, horizontal J-Runner at
head and sill, and reinforcing as shown on the drawings. Suitably frame all openings to
maintain structural support for wall.
12. Install floor-to-ceiling steel E-Studs each side of steel hinged doorframes and jamb struts
each side of elevator door frames to act as strut-studs.
13. Attach strut-stud to floor and ceiling runners with two 3/8-inch Type S-12 pan head
screws. Attach strut-studs to jamb anchors with 1/2-inch Type S-12 screws over steel
doors, install a cut-to-length section of J-Runner and attach to strut-studs with 3/8-inch
Type S-12 screws.
************************************************************************************************************************
The following UL Designs allow USG gypsum panels to be applied horizontally & vertically on metal studs;
plus not having to stagger & back horizontal butt joints: U404, U408, U415, U419, U420, U423, U424, U437,
U442, U445, U458, U465, and U493. BXUV.GuideInfo - Fire Resistance Ratings
GYPSUM DRYWALL
09290 / 09 29 00-17
************************************************************************************************************************
A. Gypsum Panels1. Install per UL Design Assembly selected and as indicated on the plans.
3.04
SUSPENDED DRYWALL CEILING INSTALLATION
A. Standard reference: Install in accordance with ASTM C636, CISCA installation standards,
and other applicable code references.
B. Manufacturer’s reference: Install in accordance with manufacturer’s current printed
recommendations.
C. Drawing reference: Install in accordance with approved shop drawings and locate ceiling in
accordance with main tee dimensions relative to elevations.
D. Component and hanger wire installation:
Flat ceilings:
1. Main tees shall be spaced a maximum of 48-inches on center and supported by hanger
wires spaced a maximum of 48-inches on center and as specified by UL Fire Resistance
Directory attaching hanger wires directly to structure above.
2. Cross tees shall be spaced per manufacturer’s recommendations and as specified by UL
Fire Resistance Directory.
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The following UL Designs allow USG gypsum panels to be applied horizontally & vertically on metal studs; plus not having
to stagger & back horizontal butt joints: U404, U408, U415, U419, U420, U423, U424, U437, U442, U445, U458, U465, and
U493. BXUV.GuideInfo - Fire Resistance Ratings
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3.05
GYPSUM BOARD INSTALLATION
A. General: Install gypsum panels in accordance with ASTM C840, GA-201, GA-216, and
manufacturer’s current written instructions to comply with codes having jurisdiction.
1. Install sound attenuation fire blankets per manufacturer’s current written instructions
where indicated for sound and fire ratings prior to installing gypsum panels. Friction fit
securely between studs. Butt ends of blankets closely together and fill all voids.
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To prevent objectionable sag in new gypsum panel ceilings, the weight of overlaid insulation
should not exceed 1.3 psf for 1/2" thick panels with frame spacing 24" o.c.; 2.2 psf for 1/2" panels
on 16" o.c. framing and 5/8" panels 24" o.c.
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2. Install per ASTM C919; where sound rating partitions are indicated, seal the partition with
a 1/4" min. round bead of acoustical sealant on the outside of the floor track. Seal
around all cutouts for lights, cabinets, pipes, ducts, and electrical boxes. Avoid back-toback penetrations of the diaphragm, flanking paths, door, and borrowed-light openings.
3. Install moisture and mold-resistant gypsum board in “dry” locations that have thin-set
ceramic tile and similar rigid applied wall finishes or as indicated.
4. Install cement backer board in “wet” locations such as showers and similar areas.
5. Install abuse-resistant gypsum board in areas indicated on plans for abuse-resistance.
6. Install fiber-reinforced gypsum board in areas indicated on plans for abuse-resistance.
7. Position all ends and edges over framing members, except when joints are at right angles
to framing members as in perpendicular application or when end joints are backblocked.
8. Locate end joints as far from the center of ceilings and walls as possible. Apply gypsum
panels first to the ceiling and then to the walls. Extend ceiling board into corners and
make firm contact with top plate. To minimize end joints, use panels of maximum
practical length. Fit ends and edges closely, but not forced together. Stagger end joints
in successive courses with joints on opposite sides of a partition placed on different
studs. Position gypsum board to within a 1/4" of the floor line.
GYPSUM DRYWALL
09290 / 09 29 00-18
9. Properly space fasteners in careful accordance with the manufacturer’s recommendation
and code requirements. Space fasteners not less than 3/8" from edges and end of
panels and drive as recommended for specified fastening method. Drive fasteners in
field of panels first, working towards ends and edges. Hold panel in firm contact with
framing while driving fasteners. Drive fastener heads slightly below surface of gypsum
panels in a uniform dimple without breaking face paper.
10. Cut ends, edges, scribe or make cutouts within field of panels in workmanlike manner.
Use keyhole saw to make cutouts. Do not use “score and knockout” method. Gypsum
board should be cut to size utilizing a knife and straight edge. Power saws and routers
should be used only if equipped with a dust collection device.
11. Attach gypsum panels to framing supports by:
a. Standard Single Nailing Method: Attach panels with required nails spaced a
maximum of 7" o.c. for ceilings, 8" o.c. for walls. Drive nails home with heads slightly
below surface of panels to provide a uniform dimple 1/32" deep. Do not use a nail
set; avoid breaking face paper. Use screw attachment to secure panels where nail
pops occur.
b. Adhesive Application: Follow adhesive manufacturer’s recommendations. Attach
gypsum panels with drywall stud adhesive applied in a continuous 3/8" bead at the
center of attachment to face of framing members. Where two panels meet on a
framing member, apply two beads permitting adhesive contact to both panels. Do
not apply adhesive to members such as bridging, diagonal bracing, etc., into which
no supplemental fasteners will be driven. Immediately following panel erection, apply
fasteners per manufacturer’s direction. Hand impact panel along framing to ensure
contact at all points.
11. Gypsum Board Ceiling Erection
a. Apply gypsum wallboard first to the ceiling and then to the walls. Attach wallboard
firmly to framing members without cutting the surface paper or fracturing the core.
b. For single-layer ceiling application, gypsum wallboard may be applied with the long
dimension either paralleled or at right angles to the framing members. All abutting
ends and edges, except in horizontal application, shall occur over framing members.
Use boards of the maximum practical length to minimize end joints. Stagger end
joints in adjacent rows. Attach board with 1” long, No.6 wallboard screws @ 8" o.c.
at edges of board and 12" o.c. in the field.
12. Power-driven screws: Attach gypsum panels with required fasteners spaced per firerated construction test; for non-fire-rated construction, a maximum of 16" o.c. for walls,
12" o.c. for ceilings. Screw heads must be driven perpendicular to board face and slightly
below the surface of the panel (max. 1/32"), but not deep enough to break the face
paper. Do not drive screws closer than 3/8" from any edge.
3.06
FIBER-REINFORCED GYPSUM PANEL INSTALLATION
A. General: Comply with applicable requirements of ASTM C840 and GA 216, fire rated assembly
requirements and as specified herein, unless otherwise required by local building authorities.
1. Cut FIBEROCK Brand Panels to size with a utility knife and straight edge. A Snapper
Shear tool specifically designed for FIBEROCK® Brand Panels may also be used. Use a
power saw only if equipped with a dust-collection device. Panels may be cut by scoring
and snapping or by sawing, working from the face side. When using the score-and-snap
method, score the panel twice and snap the panel away from the cut face. The backside of
the panels is then broken by snapping the panel in the reverse direction. If a poweroperated saw is used, a low-RPM unit with 3-1/2_ carbide blade is recommended.
2. When necessary, use a rasp or SURFORM® to smooth cut edges. Holes for pipes, fixtures
and other small openings can be cut out with a saw or a drywall router equipped with a
special bit (available from Rotozip Tool Corporation). When a router is used, hold panels
away from the wall. Where gypsum board meets projecting surfaces, scribe and neatly cut.
Smooth ragged cut ends with a rasp or sandpaper, or trim with a sharp knife.
GYPSUM DRYWALL
09290 / 09 29 00-19
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
3.07
a. Snapper Shear #SS464 Pacific International 1-800-297-7487
b. Rotozip® Corp: FBR 250 bit 1-888-387-9724 X521.
c. Microplane® FIBEROCK® Rasp Blade Model #30005.
d. Tools For Trade 1-800-582-8665.
e. Tool Source Warehouse 1-800-372-0146.
Install panels vertically whenever possible. End joints should be loosely fit. Install panels a
minimum of 1/4" above the floor. Stagger end joints in successive courses with joints on
opposite sides of a partition placed on different studs.
Use panels of maximum lengths to minimize end-to-end joints. Limit vertical application to
10-foot panel lengths.
Butt panels together for a light contact at edges and ends with not more than 1/16 inch
open space between boards. Do not force into place.
Place tapered edges next to tapered edges; do not place cut edges or butt ends adjacent to
tapered edges.
Locate all edges or end joints over supports.
Install panels to ceilings prior to installation at walls.
Stagger joints on opposite faces of wall so that joints occur on different studs.
Space fasteners not less than 3/8 inch from edges, ends, and corners of panels. Fasten
outward from center or field of each panel; drive fasteners straight and snug with heads
dimpling (slightly below) board surface.
Wood framing – Use corrosion-resistant Type W or Type S buglehead screws or hotdipped galvanized roofing nails. Fasteners must be of sufficient length to ensure a
minimum 3/4-inch penetration into wood framing.
Steel Framing – Use Corrosion-resistant Type S-12 buglehead screws for 20-12 ga. steel
framing. When using 20 ga. steel framing fasteners should be spaced no greater than 8inch o.c. Fasteners must be of sufficient length to ensure a minimum of 3/8-inch penetration
into steel framing.
Fit panels snugly into steel door frames; no joints to occur within 12 inches of the corner of
door frames, except at intersecting walls.
Contractors installing tile and tile-setting materials should always follow current ANSI
specifications, TCA guidelines and the specifications of the surfacing materials
manufacturer.
MOISTURE AND MOLD-RESISTANT GYPSUM PANEL INSTALLATION
A. General:
1. Install moisture and mold-resistant gypsum panels complying with ASTM C630 in
accordance with ASTM C840, GA-201, GA-216, and manufacturer’s current written
instructions to comply with codes having jurisdiction.
2. Pre-cut panels to required sizes and make necessary cutouts. Before installing panels,
brush thinned tile adhesive over all cut or exposed panel edges at utility holes, joints, and
intersections.
3. Install panel perpendicular with paper bound edge-abutting top of spacer strip. Fasten
panels with nails 8" o.c. max. or screws 12" o.c. max. Where ceramic tile is more than
5/16" thick will be used, space nails 4" o.c. max. and screws 8" o.c. max.
4. In areas to be tiled, treat all fastener heads with SHEETROCK® Setting-Type Joint
Compound. Fill tapered edges in gypsum panel with the SHEETROCK Setting-Type
Joint Compound, embed SHEETROCK® Joint Tape firmly, and wipe off excess
compound. Follow immediately with a second coat over the taping coat, being careful not
to crown the joint. Fold and embed tape properly in all interior angles to provide a true
angle.
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GYPSUM DRYWALL
09290 / 09 29 00-20
Due to the vast difference in paper color, untiled moisture and mold-resistant gypsum panels will
not blend with regular gypsum panels without finishing with at least two coats of setting-type joint
compound.
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1. In areas not to be tiles embed and treat fasteners with SHEETROCK® Setting-Type Joint
Compound applied in the conventional manner. Finish with at less 2 coats of joint
compound applied according to directions.
2. Prior to tile erection, seal cut panel edges of all openings around pipes, fittings, and
fixtures with thinned tile adhesive. Remove spacer strips, but do not caulk gap at bottom
of panels.
3.08
CEMENT BOARD INSTALLATION
A. General:
1. Install cement board in accordance with manufacturer’s current written instructions to
comply with codes having jurisdiction.
2. After tub, shower pan, or receptor is installed, place temporary 1'4" spacer strips around
lip of fixture. Pre-cut boards to required sizes and make necessary cutouts. Fit ends and
edges closely but not forced together.
3. Install board-abutting top of spacer strip. Stagger end joints in successive courses.
Fasten boards to wood studs spaced max. 16" o.c. and bottom plates with 1 1/4"
DUROCK Wood Screws or 1 ½" galvanized roofing nails spaced 8" o.c. Fasten boards
to minimum 20 gauge (0.0312 inches thick) steel studs spaced 16" o.c. and bottom
runners with 1 1/4" DUROCK Steel Screws spaced 8" o.c. with perimeter fasteners at
least 3/8" and less than 5/8" from ends and edges. In double-layer walls where cement
boards are installed over base-layer gypsum boards, apply a water barrier (not a vapor
retarder) over gypsum boards. Maximum fastener spacing for ceilings is 6" o.c.
4. For ceramic tile and thin brick substrates:
a. Apply panel and butt joints over metal stud framing.
b. Prefill all cement board panel joints, and joints where cement board abut other panels
or surfaces such as gypsum board, with tile setting mortar or adhesive and then
immediately embed a 2-inch alkali-resistant fiberglass tape and level the joints. As
an alternate, apply DUROCK Interior Tape over the joints and then apply tile-setting
mortar or adhesive, forcing it through the tape to completely fill and level the joints.
5. For dry untiled abuse-resistant areas:
a. Seal cement board with Type 1 Ceramic Tile Adhesive. (Mix four parts adhesive with
one part water.) Embed SHEETROCK® Joint Tape over joints and treat fasteners
with SHEETROCK® Setting-Type Joint Compound (DURABOND 45 or 90) applied in
conventional manner. Flat trowel DURABOND 45 or 90 over board to cover
fasteners and fill voids to a smooth surface. Finish joints with at least two coats of
SHEETROCK® Ready-Mixed Joint Compound. Do not apply ready-mixed or settingtype compound over unsealed board.
3.09
TRIM INSTALLATION
A. General: Install SHEETROCK® Paper Faced Drywall Beads and Trim at all internal and
external angles formed by the intersection of either gypsum panel surfaces or other surfaces.
Apply SHEETROCK ®Paper Faced Drywall Outside Corner to all vertical or horizontal
external gypsum corners in accordance with manufacturer’s directions to meet requirements
for LIFE TIME warranty from United States Gypsum Company (USG).
1. Make sure that gypsum board is clean, firm, and dry before applying corner bead and
trim.
2. Make sure that the steel bead or trim is wide enough to cover any gaps in the gypsum
board.
3. Leave a 1/4" gap between the bottom edge of the corner bead or trim and the floor.
4. Apply a full layer of taping joint compound beneath the bead or trim paper and steel.
GYPSUM DRYWALL
09290 / 09 29 00-21
5. Make sure that taping coat is completely dry before applying additional coats.
Install bullnose or square tape on outside corner bead profile as indicated at external corners.
Install cove or square tape on inside corner bead profile as indicated.
Install tape on inside offset trim for angles greater than 90°.
Install tape on “L” trim where gypsum board abuts to dissimilar surfaces.
Install tape on reveal edge trim where gypsum board abuts with suspended ceiling as shown
as indicated.
G. Install trim whenever the edge of gypsum board would otherwise be exposed or semiexposed.
H. Install control joints as detailed at spacings and locations required by referenced gypsum
board application and finish standard, and as shown by the architect for visual effect. Locate
joints to uniformly subdivide the wall or ceiling into equal sections.
1. Break gypsum panels and resilient channels behind joint and back by double supports.
Apply acoustical sealant to fill gap and attach control joint to face layer with nails or 9/16"
galvanized staples spaced 6" o.c. on both flanges along entire length of joint.
2. Install control joints where partition or furring exceeds 30'.
3. Install control joints where ceiling dimensions exceed 50' in either direction with perimeter
relief or 30' without relief.
4. Install control joints where wings of “L”, “U”, and “T” - shaped ceiling areas are joined.
5. Install control joints where partition or furring abuts a structural element (except floor) or
dissimilar wall or ceiling.
6. Install control joints where ceiling abuts a structural element, dissimilar wall or partition or
other vertical element.
7. Install control joints where construction changes within the plane of the partition or
ceiling.
8. Install control joints at less-than-ceiling height doorframes extending from both corners.
Treat window openings in same manner as door openings.
B.
C.
D.
E.
F.
3.10
FINISHING OF GYPSUM BOARD
A. General: Finish all face panel joints, internal angles, penetrations, and surface defects with a
joint treatment system applied according to manufacturer’s directions. Spot exposed
fasteners on face panels and finish corner bead, control joints and trim as required to prepare
gypsum board surfaces for decoration and levels of gypsum board finish as indicated.
B. Recommended Levels of Gypsum Board Finish GA-214 is the standard.
1. Level 1:
a. All joints and interior angles shall have tape set in joint compound. Surface shall be
free of excess joint compound. Tool marks and ridges are acceptable.
b. Finish schedule level for ceiling plenum areas, attics, building service corridors,
concealed areas and where indicated for sound and smoke control. Where a fireresistance rating is required, details of construction shall be in accordance with
reports of fire tests of assemblies that have met the fire-rating requirement.
2. Level 2:
a. All joints and interior angles shall have tape embedded in joint compound and wiped
with a joint knife leaving a thin coating of joint compound over joints and interior
angles. Fastener heads and accessories shall be covered with a coat of joint
compound. Surface shall be free of excess joint compound. Tool marks and ridges
are acceptable. Joint compound applied over the body of the tape at the time of tape
embedment shall be considered a separate coat of joint compound and shall satisfy
the conditions of this level.
b. Finish schedule level for areas that water-resistant gypsum backing board is used as
a substrate for tile, and where indicated.
2. Level 3:
a. All joints and interior angles shall have tape embedded in joint compound and one
additional coat of joint compound applied over all joints and interior angles. Fastener
heads and accessories shall be covered with two separate coats of joint compound.
GYPSUM DRYWALL
09290 / 09 29 00-22
All joint compounds shall be smooth and free of tool marks and ridges. Note: It is
recommended that the prepared surface be coated with a drywall primer prior to the
application of final finishes. See Article 2.08 DRYWALL PRIMER of this SECTION.
b. Finish schedule level for areas to receive heavy- or medium- texture finishes before
final painting, or where heavy-grade wall-coverings are to be applied as the final
decoration.
2. Level 4:
a. All joints and interior angles shall have tape embedded in joint compound and two
separate coats of joint compound applied over all flat joints and one separate coat of
joint compound applied over interior angles. Fastener heads and accessories shall
be covered with three separate coats of joint compound. All joint compounds shall be
smooth and free of tool marks and ridges. Note: It is recommended that the prepared
surface be coated with a drywall primer prior to the application of final finishes. See
Article 2.08 DRYWALL PRIMER of this SECTION.
b. Finish schedule level for areas to receive flat paints, light textures, or light wall
coverings.
2. Level 5:
a. All joints and interior angles shall have tape embedded in joint compound and two
separate coats of joint compound applied over all flat joints and one separate coat of
joint compound applied over interior angles. Fastener heads and accessories shall
be covered with three separate coats of joint compound. A thin skim coat of joint
compound or a material manufactured especially for this purpose shall be applied to
the entire surface. The surface shall be smooth and free of tool marks and ridges.
Note: It is recommended that the prepared surface be coated with a drywall primer
prior to the application of final finishes. See Article 2.08 DRYWALL PRIMER and
Article 2.09 DRYWALL PRIMER-SURFACER of this SECTION.
b. Finish schedule level where gloss, semi-gloss, enamel, or nontextured flat paints are
specified and where severe lighting conditions occur. See GA-214-96 for description
of Critical (Severe) Lighting Areas.
3.11
TEXTURE FINISHES
A. General: Prepare and apply drywall primer over all gypsum board surfaces indicated to
receive texture finish in strict accordance with texture finish manufacturer’s current written
instructions.
1. Verify finish requirements with finish schedule.
2. Mix and apply texture finish in accordance with manufacturer’s current written instructions
to produce a uniform texture matching Architect’s samples.
3. Remove any overspray or droppings created during application.
3.12
CLEANING AND PROTECTION
A. Maintain premises in a neat and orderly condition by promptly removing scrap and residual
compounds from area and surfaces.
B. Provide final protection and maintain conditions, in a manner suitable to installer that ensures
the gypsum board assemblies will remain without damage or deterioration at time of
Substantial Completion.
END OF SECTION 09290 / 09 29 00
GYPSUM DRYWALL
09290 / 09 29 00-23