Attachment_19_-_Section_09_29_00_Gypsum_Board.pdf

FA4419-14-R-0102

Attachment 19

SECTION 09 29 00

GYPSUM BOARD

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 SUSTAINABLE DESIGN CERTIFICATION

1.4 DELIVERY, STORAGE, AND HANDLING

1.4.1 Delivery

1.4.2 Storage

1.4.3 Handling

1.5 ENVIRONMENTAL CONDITIONS

1.5.1 Temperature

1.5.2 Exposure to Weather

1.5.3 Temporary Ventilation

1.6 SUSTAINABLE DESIGN REQUIREMENTS

1.6.1 Local/Regional Materials

1.6.2 Environmental Data

1.7 QUALIFICATIONS

1.8 SCHEDULING

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Gypsum Board

2.1.1.1 Regular

2.1.1.2 Foil-Backed

2.1.1.3 Type X (Special Fire-Resistant)

2.1.2 Gypsum Backing Board

2.1.2.1 Regular

2.1.2.2 Foil-Backed

2.1.2.3 Type X (Special Fire-Resistant)

2.1.3 Regular Water-Resistant Gypsum Backing Board

2.1.3.1 Regular

2.1.3.2 Type X (Special Fire-Resistant)

2.1.4 Glass Mat Water-Resistant Gypsum Tile Backing Board

2.1.4.1 Regular

2.1.4.2 Type X (Special Fire-Resistant)

2.1.5 Glass Mat Covered or Reinforced Gypsum Sheathing

2.1.5.1 Glass Mat Covered or Reinforced Gypsum Sheathing Sealant

2.1.6 Impact Resistant Gypsum Board

2.1.6.1 Structural Failure Test

2.1.6.2 Indentation Test

2.1.7 Predecorated Gypsum Board

2.1.8 Cementitious Backer Units

2.1.9 Joint Treatment Materials

2.1.9.1 Embedding Compound

2.1.9.2 Finishing or Topping Compound

2.1.9.3 All-Purpose Compound

2.1.9.4 Setting or Hardening Type Compound

2.1.9.5 Joint Tape

2.1.10 Fasteners

2.1.10.1 Nails

2.1.10.2 Screws

2.1.10.3 Staples

2.1.11 Adhesives

2.1.11.1 Adhesive for Fastening Gypsum Board to Metal Framing

2.1.11.2 Adhesive for Fastening Gypsum Board to Wood Framing

2.1.11.3 Adhesive for Laminating

2.1.12 Gypsum Studs

2.1.13 Shaftwall Liner Panel

2.1.14 Accessories

2.1.15 Asphalt Impregnated Building Felt

2.1.16 Water

PART 3 EXECUTION

3.1 EXAMINATION

3.1.1 Framing and Furring

3.1.2 [Gypsum Board] [and] [Framing]

3.1.3 [Masonry] [and] [Concrete] Walls

3.2 APPLICATION OF GYPSUM BOARD

3.2.1 Application of Single-Ply Gypsum Board to Wood Framing

3.2.2 Application of Two-Ply Gypsum Board to Wood Framing

3.2.3 Adhesive Nail-On Application to Wood Framing

3.2.4 Semi-Solid Gypsum Board Partitions

3.2.5 Solid Gypsum Board Partitions

3.2.6 Adhesive Application to Interior Masonry or Concrete Walls

3.2.7 Application of Gypsum Board to Steel Framing and Furring

3.2.8 Arches and Bending Radii

3.2.9 Gypsum Board for Wall Tile or Tile Base Applied with Adhesive

3.2.10 Exterior Application

3.2.11 Glass Mat Covered or Fiber Reinforced Gypsum Sheathing

3.2.12 Floating Interior Angles

3.2.13 Control Joints

3.2.14 Application of Foil-Backed Gypsum Board

3.2.15 Application of Predecorated Gypsum Board

3.2.16 Application of Impact Resistant Gypsum Board

3.3 APPLICATION OF CEMENTITIOUS BACKER UNITS

3.3.1 Application

3.3.2 Joint Treatment

3.4 FINISHING OF GYPSUM BOARD

3.4.1 Uniform Surface

3.4.2 Metal Trim for Predecorated Gypsum Board

3.5 SEALING

3.5.1 Sealing for Glass Mat or Reinforced Gypsum Board Sheathing

3.6 FIRE-RESISTANT ASSEMBLIES

3.7 PATCHING

3.8 SHAFTWALL FRAMING

3.9 WASTE MANAGEMENT

-- End of Section Table of Contents --

SECTION 09 29 00

GYPSUM BOARD

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI A108.11 (1992; Reaffirmed 2005) Specifications for Interior Installation of

Cementitious Backer

Units

ASTM INTERNATIONAL (ASTM)

ASTM C1002 (2007) 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

ASTM C1047 (2010a) Standard Specification for Accessories for Gypsum

Wallboard And Gypsum Veneer Base

ASTM C1177/C1177M (2008) Standard Specification for Glass Mat Gypsum

Substrate for Use as Sheathing

ASTM C1178/C1178M (2011) Standard Specification for Glass Mat Water-

Resistant Gypsum Backing Panel

ASTM C1396/C1396M (2013) Standard Specification for Gypsum Board

ASTM C1629/C1629M (2006; R 2011) Standard Classification for Abuse-Resistant

Nondecorated Interior Gypsum Panel Products and

Fiber-Reinforced Cement Panels

ASTM C475/C475M (2012) Joint Compound and Joint Tape for Finishing

Gypsum Board

ASTM C514 (2004; E 2009; R 2009) Standard Specification for Nails for the Application of Gypsum Board

ASTM C557 (2003; E 2009; R 2009) Adhesives for Fastening Gypsum Wallboard to

Wood Framing

ASTM C840 (2011) Application and Finishing of Gypsum Board

ASTM C954 (2011) Steel Drill Screws for the Application of Gypsum

Panel Products or Metal Plaster Bases to Steel Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in

Thickness

ASTM D1037 (2012) Evaluating Properties of Wood-Base Fiber and

Particle Panel Materials

ASTM D1149 (2007; R 2012) Standard Test Method for Rubber Deterioration –

Surface Ozone Cracking in a Chamber

ASTM D226/D226M (2009) Standard Specification for Asphalt-Saturated

Organic Felt Used in Roofing and Waterproofing

ASTM D2394 (2005; R 2011) Simulated Service Testing of Wood and Wood-Base

Finish Flooring

ASTM D412 (2006a; R 2013) Standard Test Methods for Vulcanized Rubber and

Thermoplastic Elastomers - Tension

ASTM D5420 (2010) Impact Resistance of Flat, Rigid Plastic Specimen by Means of a Strike Impacted by a Falling Weight

(Gardner Impact)

ASTM D624 (2000; R 2012) Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers

ASTM E2129 (2010) Standard Practice for Data Collection for

Sustainability

Assessment of Building Products

ASTM E695 (2003; R 2009) Measuring Relative Resistance of Wall, Floor, and

Roof Construction to Impact Loading

ASTM E84 (2013a) Standard Test Method for Surface Burning

Characteristics of Building Materials

GYPSUM ASSOCIATION (GA)

GA 214 (2010) Recommended Levels of Gypsum Board Finish

GA 216 (2010) Application and Finishing of Gypsum Panel

Products

GA 224 (2008) Installation of Predecorated Gypsum Board

GA 253 (2012) Application of Gypsum Sheathing

GA 600 (2009) Fire Resistance Design Manual

SCIENTIFIC CERTIFICATION SYSTEMS (SCS)

SCS Scientific Certification Systems (SCS)Indoor

Advantage

U.S. GREEN BUILDING COUNCIL (USGBC)

LEED NC (2009) Leadership in Energy and Environmental

Design(tm) New Construction Rating System

UL ENVIRONMENT (ULE)

ULE Greenguard UL Greenguard Certification Program

UNDERWRITERS LABORATORIES (UL)

UL Fire Resistance (2012) Fire Resistance Directory

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation; submittals not having a

"G" designation are [for Contractor Quality Control approval.][for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government.] Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-03 Product Data

Cementitious backer units

Glass Mat Water-Resistant Gypsum Tile Backing Board

Water-Resistant Gypsum Backing Board

Glass Mat Covered or Reinforced Gypsum Sheathing

Glass Mat Covered or Reinforced Gypsum Sheathing Sealant

Impact Resistant Gypsum Board

Accessories

Submit for each type of gypsum board and for cementitious backer units.

Certification

Gypsum Board; (LEED NC)

Submit documentation indicating percentage of post-industrial and post-consumer recycled content per unit of product. Indicate relative dollar value of recycled content products to total dollar value of products included in project.

Adhesives; (LEED NC)

Joint Treatment Materials

Submit manufacturer's product data, indicating VOC content.

Local/Regional Materials; (LEED NC)

Documentation indicating distance between manufacturing facility and the project site. Indicate distance of raw material origin from the project site.

Indicate relative dollar value of local/regional materials to total dollar value of products included in project.]

Environmental Data

SD-04 Samples

Predecorated gypsum board[; G][; G, [_____]]

Submit for each color and pattern of predecorated gypsum board. Where colors are not indicated, submit color selection samples of not less than eight of the manufacturer's standard colors.

SD-07 Certificates

Asbestos Free Materials[; G][; G, [_____]]

Certify that gypsum board types, gypsum backing board types, cementitious backer units, and joint treating materials do not contain asbestos.

SD-08 Manufacturer's Instructions

Material Safety Data Sheets

SD-10 Operation and Maintenance Data

Manufacturer maintenance instructions

Waste Management

SD-11 Closeout Submittals

Local/Regional Materials; (LEED)

LEED documentation relative to local/regional materials credit in accordance with LEED Reference Guide. Include in LEED

Documentation Notebook.

Gypsum Board; (LEED)

LEED documentation relative to recycled content credit in accordance with LEED Reference Guide. Include in LEED Documentation Notebook.

Adhesives; (LEED)

LEED documentation relative to low emitting materials credit in accordance with LEED Reference Guide. Include in LEED

Documentation Notebook.

1.3 SUSTAINABLE DESIGN CERTIFICATION

Product shall be third party certified in accordance with ULE Greenguard[ Gold], SCS Scientific

Certification Systems Indoor Advantage[ Gold ]or equal. Certification shall be performed annually and shall be current.]

1.4 DELIVERY, STORAGE, AND HANDLING

1.4.1 Delivery

Deliver materials in the original packages, containers, or bundles with each bearing the brand name, applicable standard designation, and name of manufacturer, or supplier.

1.4.2 Storage

Keep materials dry by storing inside a sheltered building. Where necessary to store gypsum board and cementitious backer units outside, store off the ground, properly supported on a level platform, and protected from direct exposure to rain, snow, sunlight, and other extreme weather conditions. Provide adequate ventilation to prevent condensation. Store per manufacturer's recommendations for allowable temperature and humidity range. Gypsum wallboard shall not be stored with materials which have high emissions of volatile organic compounds (VOCs) or other contaminants. Do not store panels near materials that may offgas or emit harmful fumes, such as kerosene heaters, fresh paint, or adhesives.

1.4.3 Handling

Neatly stack gypsum board and cementitious backer units flat to prevent sagging or damage to the edges, ends, and surfaces.

1.5 ENVIRONMENTAL CONDITIONS

1.5.1 Temperature

Maintain a uniform temperature of not less than 50 degrees F in the structure for at least

48 hours prior to, during, and following the application of gypsum board, cementitious backer units, and joint treatmentmaterials, or the bonding of adhesives.

1.5.2 Exposure to Weather

Protect gypsum board and cementitious backer unit products from direct exposure to rain, snow, sunlight, and other extreme weather conditions.

1.5.3 Temporary Ventilation

Provide temporary ventilation for work of this section, if necessary.

1.6 SUSTAINABLE DESIGN REQUIREMENTS

1.6.1 Local/Regional Materials

Use materials or products extracted, harvested, or recovered, as well as manufactured, within a 500 mile radius from the project site, if available from a minimum of three sources. See Section 01 33 29 LEED DOCUMENTATION for cumulative total local material requirements. Gypsum board materials are locally available.

1.6.2 Environmental Data

[Submit Table 1 of ASTM E2129 for the following products: [_____].]

1.7 QUALIFICATIONS

Furnish type of gypsum board work specialized by the installer with a minimum of 3 years of documented successful experience.

PART 2 PRODUCTS

2.1 MATERIALS

Conform to specifications, standards and requirements specified. Provide gypsum board types, gypsum backing board types, cementitious backing units, and joint treating materials manufactured from asbestos free materials only.

Submit Material Safety Data Sheets and manufacturer maintenance instructions for gypsum materials including adhesives.

2.1.1 Gypsum Board

ASTM C1396/C1396M. [Gypsum board shall contain a minimum of [5][10][_____] percent post-consumer recycled content, or a minimum of [20][40][_____] percent post-industrial recycled content.] [Paper facings shall contain

[100][_____] percent post-consumer recycled paper content. Gypsum cores shall contain a minimum of [95][_____] percent post-industrial recycled gypsum content.][See Section

01 33 29 LEED(tm) DOCUMENTATION for cumulative total recycled content requirements. Gypsum board may contain post-consumer or post-industrial recycled content.]

2.1.1.1 Regular

48 inch wide, ½ or 5/8 inch thick, regular edges, unless indicated otherwise.

[Provide tapered and featured edge gypsum board as indicated.

2.1.1.2 Foil-Backed

48 inch wide,1/2 or 5/8 inch thick, regular edges, unless otherwise noted.

2.1.1.3 Type X (Special Fire-Resistant)

48 inch wide, ½ or 5/8 inch thick, tapered and featured edges.

2.1.2 Gypsum Backing Board

ASTM C1396/C1396M, gypsum backing board shall be used as a base in a multilayer system.

2.1.2.1 Regular

48 inch wide, ½ or 5/8 inch thick, square edges.

2.1.2.2 Foil-Backed

2.1.2.3 Type X (Special Fire-Resistant)

2.1.3 Regular Water-Resistant Gypsum Backing Board

ASTM C1396/C1396M

2.1.3.1 Regular

48 inch wide, [1/2] [5/8] inch thick, tapered edges.

2.1.3.2 Type X (Special Fire-Resistant)

48 inch wide, [1/2] [5/8] inch thick, tapered edges.

2.1.4 Glass Mat Water-Resistant Gypsum Tile Backing Board

ASTM C1178/C1178M

2.1.4.1 Regular

48 inch wide, [1/2] [5/8] inch thick, square edges.

2.1.4.2 Type X (Special Fire-Resistant)

48 inch wide, [1/2] [5/8] inch thick, square edges.

2.1.5 Glass Mat Covered or Reinforced Gypsum Sheathing

Exceeds physical properties of ASTM C1396/C1396M and ASTM C1177/C1177M.

Provide [1/2][5/8] inch, gypsum sheathing. Provide gypsum board of with a noncombustible water-resistant core, with glass mat surfaces embedded to the gypsum core or reinforcing embedded throughout the gypsum core. Warrant gypsum sheathing board for at least twelve months against delamination due to direct weather exposure.

Provide continuous, asphalt impregnated, building felt to cover exterior face of sheathing.

Seal [all joints, seams, and penetrations with compatible sealant.]

2.1.5.1 Glass Mat Covered or Reinforced Gypsum Sheathing Sealant

Provide sealant compatible with gypsum sheathing, rubber washers for masonry veneer anchors, and other associated cavity wall components such as anchors and through wall flashing. Provide sealants for gypsum sheathing board edge seams and veneer anchor penetrations recommended by the gypsum sheathing manufacturer and have the following performance requirements:

a. ASTM D412: Tensile Strength, 80 psi

b. ASTM D412: Ultimate Tensile Strength (maximum elongation), 170 psi

c. ASTM D624: Tear Strength, dieB, 427 ppi

d. ASTM D1149: Joint Movement Capability after 14 Days cure, plus or minus 50 percent.

2.1.6 Impact Resistant Gypsum Board

48 inchwide, 5/8 inch thick, tapered edges. Reinforced gypsum panel with imbedded fiber mesh or lexan backing testing in accordance with the following tests. Hard body impact test must attain a Level 2 performance in accordance with ASTM

C1629/C1629M. Provide fasteners that meet manufacturer requirements and specifications stated within this section. Impact resistant gypsum board, when tested in accordance with ASTM E84, have [a flame spread rating of 25 or less and a smoke developed rating of 50 or less for [_____]] [and] [a flame spread rating of 75 or less and a smoke developed rating of 100 or less for [_____]].

2.1.6.1 Structural Failure Test

ASTM E695 or ASTM D2394 for structural failure (drop penetration). ASTM

E695 using a 60 lb sand filled leather bag, resisting no less than 300 ft. lb.

cumulative impact energy before failure or ASTM D2394 using 5.5 inch hemispherical projectile resisting no less than 264 ft. lb. before failure. Provide test specimen stud spacing a minimum 16 inch on center.

2.1.6.2 Indentation Test

ASTM D5420 or ASTM D1037 for indentation resistance. ASTM D5420 using a

32 oz weight with a 5/8 inch hemispherical impacting head dropped once 3 feet creating not more than 0.137 inch indentation or ASTM D1037 using no less than

470 lb weight applied to the 0.438 inch diameter ball to create not more than a

0.0197 inch indentation depth.

2.1.7 Predecorated Gypsum Board

ASTM C1396/C1396M, [regular] [Type X] gypsum board, 48 inch wide, ½ or 5/8 inch thick, with a decorative wall covering (Class I) [or coating (Class II)] applied in-plant by the gypsum board manufacturer. The color [and pattern] of wall covering shall be

[_____] [as selected]. Provide [_____] color [and pattern] wall covering selected.

[Furnish gypsum board with square edges, and a slight bevel to produce a shallow vee joint. Wrap all coverings around edges.] Furnish a predecorated gypsum board with [a flame spread rating of 25 or less and a smoke developed rating of 50 or less for [_____]]

[and] [a flame spread rating of 75 or less and a smoke developed rating of 100 or less for[_____]].

2.1.8 Cementitious Backer Units

In accordance with the Tile Council of America (TCA) Handbook.

2.1.9 Joint Treatment Materials

ASTM C475/C475M. [Use all purpose joint and texturing compound containing inert fillers and natural binders, including lime compound. Pre-mixed compounds shall be free of antifreeze, vinyl adhesives, preservatives, biocides and other slow releasing compounds.]

2.1.9.1 Embedding Compound

Specifically formulated and manufactured for use in embedding tape at gypsum board joints and compatible with tape, substrate and fasteners.

2.1.9.2 Finishing or Topping Compound

Specifically formulated and manufactured for use as a finishing compound.

2.1.9.3 All-Purpose Compound

Specifically formulated and manufactured to serve as both a taping and a finishing compound and compatible with tape, substrate and fasteners.

2.1.9.4 Setting or Hardening Type Compound

Specifically formulated and manufactured for use with fiber glass mesh tape.

2.1.9.5 Joint Tape

Use cross-laminated, tapered edge, reinforced paper, or fiber glass mesh tape recommended by the manufacturer.

2.1.10 Fasteners

2.1.10.1 Nails

ASTM C514. [For predecorated gypsum board provide special nails with factory coated heads of color to match wall covering materials as recommended by the predecorated gypsum board manufacturer.]

2.1.10.2 Screws

ASTM C1002, Type "G", Type "S" or Type "W" steel drill screws for fastening gypsum board to gypsum board, wood framing members and steel framing members less than 0.033 inch thick. ASTM C954 steel drill screws for fastening gypsum board to steel framing members 0.033 to 0.112 inch thick. Provide cementitious backer unit screws with a polymer coating.

2.1.10.3 Staples

No. 16 USS gageflattened galvanized wire staples with 7/16 inch wide crown outside measurement and divergent point for base ply of two-ply gypsum board application. Use as follows:

Length of Legs Thickness of Gypsum Board

1-1/8 inches 1/2 inch

1-1/4 inches 5/8 inch

2.1.11 Adhesives

Do not use adhesive containing benzene, carbon tetrachloride, or trichloroethylene.[ Adhesive shall contain a maximum VOC content of 50 grams per liter.][ Adhesive must meet the requirements of LEED low emitting materials credit.]

2.1.11.1 Adhesive for Fastening Gypsum Board to Metal Framing

[Not permitted.][Type recommended by gypsum board manufacturer.]

2.1.11.2 Adhesive for Fastening Gypsum Board to Wood Framing

[Not permitted.][ASTM C557.]

2.1.11.3 Adhesive for Laminating

[Not permitted.][ Adhesive attachment is not permitted for multi-layer gypsum boards. For laminating gypsum studs to face panels, provide adhesive recommended by gypsum board manufacturer.]

2.1.12 Gypsum Studs

Provide one inch minimum thickness and 6 inch minimum width. Studs may be of one inch thick gypsum board or multilayers fastened to required thickness. Conform to

ASTM C1396/C1396M for material.

2.1.13 Shaftwall Liner Panel

ASTM C1396/C1396M. Conform to the UL Fire Resistance for the Design Numbers(s) indicated for shaftwall liner panels. Manufacture liner panel for cavity shaftwall system, with water-resistant paper faces, bevel edges, single lengths to fit required conditions,[1"]

[3/4"] thick, by 24" wide.

2.1.14 Accessories

ASTM C1047. Fabricate from corrosion protected steel or plastic designed for intended use. Accessories manufactured with paper flanges are not acceptable. Flanges shall be free of dirt, grease, and other materials that may adversely affect bond of joint treatment.

Provide prefinished or job decorated materials. [For predecorated gypsum board provide prefinished metal or plastic trim to match predecorated gypsum board.]

2.1.15 Asphalt Impregnated Building Felt

Provide a 15 lb asphalt moisture barrier over gypsum sheathing. Conforming to ASTM

D226/D226M Type 1 (No. 15) for asphalt impregnated building felt.

2.1.16 Water

Provide clean, fresh, and potable water.

PART 3 EXECUTION

3.1 EXAMINATION

3.1.1 Framing and Furring

Verify that framing and furring are securely attached and of sizes and spacing to provide a suitable substrate to receive gypsum board and cementitious backer units. Verify that all blocking, headers and supports are in place to support plumbing fixtures and to receive soap dishes, grab bars, towel racks, and similar items. Do not proceed with work until framing and furring are acceptable for application of gypsum board and cementitious backer units.

3.1.2 [Gypsum Board] [and] [Framing] Verify that surfaces of [gypsum board] [and] [framing] to be bonded with an adhesive are free of dust, dirt, grease, and any other foreign matter. Do not proceed with work until surfaces are acceptable for application of gypsum board with adhesive.

3.1.3 [Masonry] [and] [Concrete] Walls

Verify that surfaces of [masonry] [and] [concrete] walls to receive gypsum board applied with adhesive are dry, free of dust, oil, form release agents, protrusions and voids, and any other foreign matter. Do not proceed with work until surfaces are acceptable for application of gypsum board with adhesive.

3.2 APPLICATION OF GYPSUM BOARD

Apply gypsum board to framing and furring members in accordance with ASTM C840 or GA

216 and the requirements specified. Apply gypsum board with separate panels in moderate contact; do not force in place. Stagger end joints of adjoining panels. Neatly fit abutting end and edge joints. Use gypsum board of maximum practical length; select panel sizes to minimize waste. Cut out gypsum board to make neat, close, and tight joints around openings. In vertical application of gypsum board, provide panels in lengths required to reach full height of vertical surfaces in one continuous piece. Lay out panels to minimize waste;

reuse cutoffs whenever feasible. Surfaces of gypsum board and substrate members may [not ]be bonded together with an adhesive[, except where prohibited by fire rating(s)]. Treat edges of cutouts for plumbing pipes, screwheads, and joints with water-resistant compound as recommended by the gypsum board manufacturer. Minimize framing by floating corners with single studs and drywall clips. [Install 5/8 inch ][_____] gypsum or [1/2 inch ][_____] ceiling board over framing at [24 inches ][_____] on center.] Provide type of gypsum board for use in each system specified herein as indicated.

3.2.1 Application of Single-Ply Gypsum Board to Wood Framing

Apply in accordance with ASTM C840, System I or GA 216.

3.2.2 Application of Two-Ply Gypsum Board to Wood Framing

Apply in accordance with ASTM C840, System II or GA 216.

3.2.3 Adhesive Nail-On Application to Wood Framing

Apply in accordance with ASTM C840, System III or GA 216. This method may be used in lieu of ASTM C840, System I at the option of the Contractor.

3.2.4 Semi-Solid Gypsum Board Partitions

Provide in accordance with ASTM C840, System IV or GA 216 .

3.2.5 Solid Gypsum Board Partitions

Provide in accordance with ASTM C840, System V or GA 216.

3.2.6 Adhesive Application to Interior Masonry or Concrete Walls Apply in accordance with ASTM C840, System VI or GA 216.

3.2.7 Application of Gypsum Board to Steel Framing and Furring Apply in accordance with ASTM C840, System VIII or GA 216.

3.2.8 Arches and Bending Radii

Apply gypsum board in accordance with ASTM C840, System IX or GA 216.

3.2.9 Gypsum Board for Wall Tile or Tile Base Applied with Adhesive In dry areas (areas other than tubs, shower enclosures, saunas, steam rooms, gang shower rooms), apply glass mat water-resistant gypsum tile backing board [or water-resistant gypsum backing board] in accordance with

ASTM C840, System X or GA 216.

3.2.10 Exterior Application

Apply exterior gypsum board (such as at soffits) in accordance with

ASTM C840, System XI or GA 216.

3.2.11 Glass Mat Covered or Fiber Reinforced Gypsum Sheathing

Apply gypsum sheathing in accordance to gypsum association publications GA 253.

Follow gypsum sheathing manufacturer's requirements of design details for joints and fasteners and be properly installed to protect the substrate from moisture intrusion. Do not leave exposed surfaces of the gypsum sheathing beyond the manufacturer's recommendation without a weather barrier cladding.

Provide continuous asphalt impregnated building felt over sheathing surface in shingle fashion with edges and ends lapped a minimum of 6 inch. Property flash the openings.

[Seal all joints, seams, and penetrations with a compatible silicone sealant.]

3.2.12 Floating Interior Angles

Minimize framing by floating corners with single studs and drywall clips. Locate the attachment fasteners adjacent to ceiling and wall intersections in accordance with ASTM

C840, System XII or GA 216, for [single-ply] [and]

[two-ply] applications of gypsum board to wood framing.

3.2.13 Control Joints

Install expansion and contraction joints in ceilings and walls in accordance with ASTM

C840, System XIII or GA 216. Fill control joints between studs in fire-rated construction with firesafing insulation to match the fire-rating of construction.

3.2.14 Application of Foil-Backed Gypsum Board

Apply foil-backed gypsum board in accordance with ASTM C840, System XIV or GA

216.

3.2.15 Application of Predecorated Gypsum Board

Apply predecorated gypsum board in accordance with GA 224. Attach predecorated gypsum board with adhesive and fasteners as recommended by the manufacturer.

Conceal fasteners in the finished work.

3.2.16 Application of Impact Resistant Gypsum Board

Apply in accordance with applicable system of ASTM C840 as specified or GA 216.

Follow manufacturers written instructions on how to cut, drill and attach board.

3.3 APPLICATION OF CEMENTITIOUS BACKER UNITS

3.3.1 Application

In wet areas (tubs, shower enclosures, saunas, steam rooms, gang shower rooms), apply cementitious backer units in accordance with ANSI A108.11. Place a 15 lb asphalt impregnated, continuous felt paper membrane behind cementitious backer units, between backer units and studs or base layer of gypsum board. Place membrane with a minimum 6 inch overlap of sheets laid shingle style.

3.3.2 Joint Treatment

ANSI A108.11.

3.4 FINISHING OF GYPSUM BOARD

Tape and finish gypsum board in accordance with ASTM C840, GA 214 and GA 216. Finish plenum areas above ceilings to Level 1 in accordance with GA 214. Finish water resistant gypsum backing board, ASTM C1396/ C1396M, to receive ceramic tile to Level 2 in accordance with GA 214. Finish walls and ceilings to receive a heavy-grade wall covering or heave textured finish before painting to Level 3 in accordance with GA 214. Finish walls and ceilings without critical lighting to receive flat paints, light textures, or wall coverings to Level 4 in accordance with GA 214. Unless otherwise specified, finish all gypsum board walls, partitions and ceilings to Level 5 in accordance with GA 214. Provide joint, fastener depression, and corner treatment. Tool joints as smoothly as possible to minimize sanding and dust. Do not use fiber glass mesh tape with conventional drying type joint compounds; use setting or hardening type compounds only. Provide treatment for water-resistant gypsum board as recommended by the gypsum board manufacturer. Protect workers, building occupants, and HVAC systems from gypsum dust.

3.4.1 Uniform Surface

Wherever gypsum board is to receive eggshell, semigloss or gloss paint finish, or where severe, up or down lighting conditions occur, finish gypsum wall surface in accordance to

GA 214 Level 5. In accordance with GA 214 Level 5, apply a thin skim coat of joint compound to the entire gypsum board surface, after the two-coat joint and fastener treatment is complete and dry.

3.4.2 Metal Trim for Predecorated Gypsum Board

Finish edges, ends, and joints of predecorated gypsum board, except prefinished vee joints and monolithic type joints, with metal or plastic trim selected to match the gypsum board finish.

3.5 SEALING

Seal openings around pipes, fixtures, and other items projecting through gypsum board and cementitious backer units as specified in Section 07 92 00 JOINT SEALANTS Apply material with exposed surface flush with gypsum board or cementitious backer units.

3.5.1 Sealing for Glass Mat or Reinforced Gypsum Board Sheathing Apply silicone sealant in a 3/8 inch bead to all joints and trowel flat. Apply enough of the same sealant to all fasteners penetrating through the glass mat gypsum board surface to completely cover the penetration when troweled flat. Do not place [construction and materials behind sheathing until a visual inspection of sealed joints during daylight hours has been completed by Contracting

Officer.]

3.6 FIRE-RESISTANT ASSEMBLIES

Wherever fire-rated construction is indicated, provide materials and application methods, including types and spacing of fasteners,[ wall[ and ceiling] framing] in accordance with the specifications contained in [ UL Fire Resistance for the Design Number(s) indicated], [or] [GA

600 for the File Number(s) indicated]. Joints of fire-rated gypsum board enclosures shall be closed and sealed in accordance with UL test requirements or GA requirements. Seal penetrations through rated partitions and ceilings tight in accordance with tested systems.

3.7 PATCHING

Patch surface defects in gypsum board to a smooth, uniform appearance, ready to receive finishes. [Remove predecorated gypsum board which cannot be restored to like-new condition.

Provide new predecorated gypsum board.]

3.8 SHAFTWALL FRAMING

Install the shaftwall system in accordance with the system manufacturer's published instructions.

Coordinate bucks, anchors, blocking and other items placed in or behind shaftwall framing with electrical and mechanical work. Patch or replace fireproofing materials which are damaged or removed during shaftwall construction.

3.9 WASTE MANAGEMENT

As specified in Waste Management Plan and as follows. Separate clean waste gypsum products from contaminants. Do not include wood, plastic, metal, asphalt-impregnated gypsum board, or any gypsum board coated with glass fiber, vinyl, decorative paper, or other finish. Place in designated area and protect from moisture and contamination. Coordinate with Section 32 05 33

LANDSCAPE ESTABLISHMENT to identify requirements for gypsum soil amendment and to prepare scrap gypsum board for use as soil amendment. [ Identify manufacturer's policy for collection or return of remaining [construction scrap,] [unused material,] [demolition scrap,] and

[packaging material]. Institute demolition and construction recycling to take advantage of manufacturer's programs. When such a service is not available, seek local recyclers to reclaim the materials.]

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