SECTION 09260

GYPSUM BOARD SYSTEMS

PART 1 GENERAL

SECTION INCLUDES

Metal stud wall framing.

Metal channel ceiling framing.

Acoustical insulation.

Gypsum board.

[Gypsum sheathing.] [Cementitious backer board.]

[Taped and sanded] [Batten] joint treatment.

[Texture finish.]

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section [______-____________]: Frames for recessed [washroom accessories.] [access panels.] [________.]

RELATED SECTIONS

Section 05400 - Cold Formed Metal Framing.

Section 06114 - Wood Blocking and Curbing: Wood blocking for support of [________].

Section [______-____________]:	Thermal insulation.

Section 08112 - Standard Steel Frames.

Section 08115 - Custom Steel Frames.

Section 08305 - Access Doors: Metal access panels.

Section 09111 - Metal Stud Framing System.

Section 09206 - Metal Furring and Lathing.

Section 09210 - Gypsum Plaster.

Section 09220 - Portland Cement Plaster.

Section 09900 - Painting: Surface finish.

Section 09955 - Vinyl Coated Fabric Wall Covering: Surface finish.

Section 10616 - Demountable Gypsum Board Partitions.

REFERENCES

ASTM C36 - Gypsum Wallboard.

ASTM C79 - Gypsum Sheathing Board.

ASTM C442 - Gypsum Backing Board and Core Board.

ASTM C475 - Joint Treatment Materials for Gypsum Wallboard Construction.

ASTM C514 - Nails for the Application of Gypsum Wallboard.

ASTM C557 - Adhesive for Fastening Gypsum Wallboard to Wood Framing.

ASTM C630 - Water Resistant Gypsum Backing Board.

ASTM C645 - Non-Load (Axial) Bearing Steel Studs, Runners (Track), and Rigid Furring Channels for Screw Application of Gypsum Board.

ASTM C665 - Mineral Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing.

ASTM C754 - Installation of Framing Members to Receive Screw Attached Gypsum Wallboard, Backing Board, or Water Resistant Backing Board.

ASTM C840 - Application and Finishing of Gypsum Board.

ASTM C931 - Exterior Gypsum Soffit Board.

ASTM C1002 - Steel Drill Screws for the Application of Gypsum Board.

ASTM E90 - Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions.

ASTM E119 - Fire Tests of Building Construction and Materials.

GA-201 - Gypsum Board for Walls and Ceilings.

GA-216 - Recommended Specifications for the Application and Finishing of Gypsum Board.

GA-600 - Fire Resistance Design Manual.

SYSTEM DESCRIPTION

Acoustical Attenuation for [Identified] Interior Partitions: [_____] STC in accordance with ASTM E90.

Shaft Wall: Perform to the following:

Air Pressure Within Shaft: [____] psf ([____] KPa) with maximum mid-span deflection of [____] inches ([____] mm).

Acoustical Attenuation: [____] STC in accordance with ASTM E90.

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Shop Drawings: Indicate special details associated with [fireproofing,] [acoustical seals,] and [__________].

Product Data: Provide data on metal framing, gypsum board, joint [tape] [batten]; [decorative finish,] and [________].

Samples:	Submit [two] [_______] samples of predecorated gypsum board, [____x____] inch ([____x____] mm) in size illustrating finish color and texture.

QUALITY ASSURANCE

Perform Work in accordance with [ASTM C840.] [GA-201, GA- 216 [and GA-600].] [________.]

Maintain [one copy] [[____] copies] of [each] document on site.

QUALIFICATIONS

Applicator: Company specializing in performing the work of this section [with minimum [__________] years [documented] experience] [approved by manufacturer].

REGULATORY REQUIREMENTS

Conform to [applicable] [___________] code for fire rated assemblies [in conjunction with Section [05400] [09111]] [________] as follows:

Fire Rated Partitions: Listed assembly by [UL] [FM] [GA File] No. [____].

Fire Rated Ceiling [and Soffits]: Listed assembly by [UL] [FM] [GA File] No. [____].

Fire Rated Structural Column Framing: Listed assembly by [UL] [FM] [GA File] No. [____].

Fire Rated Structural Beam Framing: Listed assembly by [UL] [FM] [GA File] No. [____].

Fire Rated Shaft Wall Requirements: [____] hour in accordance with [[UL] [____] listed assembly No. [____].] [[GA File No. [____].]

PART 2 PRODUCTS

MANUFACTURERS - GYPSUM BOARD SYSTEM

[__________________________________] Product [_________].

Other acceptable manufacturers offering equivalent products.

[______________________________] Product [_________].

[______________________________] Product [_________].

[______________________________] Product [_________].

Substitutions: Under provisions of Section [01600.] [________.]

FRAMING MATERIALS

Studs and Tracks: [ASTM C645;] [GA-216 [and GA-600]]; galvanized sheet steel, [26] [25] [22] [20] [____] gage ([0.48] [0.55] 0.76] 0.91] [____] mm) thick, [C] [____] shape, [with knurled faces.]

Shaft Wall Studs and Accessories: [________]; [________] manufactured by [____________].

Furring, Framing and Accessories: [ASTM C645.] [GA-216 [and GA-600].] [________.]

Fasteners: [ASTM C514.] [ASTM C1002.] [GA-216.] [________.]

Anchorage to Substrate: Tie wire, nails, screws and other metal supports, of type and size to suit application; to rigidly secure materials in place.

Adhesive: [ASTM C557.] [GA-216.] [________.]

GYPSUM BOARD MATERIALS

Standard Gypsum Board: ASTM C36; [3/8] [1/2] [5/8] inch ([10] [13] [16] mm) thick, maximum permissible length; ends square cut, [tapered] [tapered and beveled] [square] [round] edges.

Fire Rated Gypsum Board:	ASTM C36; fire resistive type, UL rated; [1/2] [5/8] inch ([13] [16] mm) thick, maximum permissible length; ends square cut, [tapered] [tapered and beveled] [square] [round] edges.

Moisture Resistant Gypsum Board:	ASTM C630; [1/2] [5/8] inch ([13] [16] mm) thick, maximum permissible length; ends square cut, [tapered] [tapered and beveled] [square] [round] edges.

Exterior Gypsum Soffit Board: ASTM C931; [standard] [fire rated] type, [1/2] [5/8] inch ([13] [16] mm) thick, maximum permissible length; ends square cut, [tapered] [tapered and beveled] [square] [round] edges.

Foil Faced Gypsum Board:	ASTM C36; [3/8] [1/2] [5/8] inch ([10] [13] [16] mm) thick, [insulating type,] maximum permissible length; back surface laminated with aluminum foil; ends square cut, [tapered and beveled] [square] [round] edges.

Gypsum Backing Board: ASTM C442; [standard] [fire rated] [insulating] type; [3/8] [1/2] [5/8] inch ([10] [13] [16] mm) thick; [square] [round] [V-grooved] [book tongue and grooved] edges, ends square cut, maximum permissible length.

Gypsum Sheathing Board: ASTM C79; moisture resistant [and fire resistant] type; [1/2] [5/8] inch ([13] [16] mm) thick, maximum permissible length; ends square cut, [square] [book tongue and grooved] edges; water repellent paper faces.

Gypsum Core Board: [ASTM C442,] 1 inch (25 mm) thick, maximum permissible length; [square] [tongue and groove] edges, ends square cut.

Cementitious Backing Board: High density, glass fiber reinforced, [1/2] [____] inch ([13] [____] mm) thick; 2 inch (50 mm) wide, coated glass fiber tape for joints and corners; [________] manufactured by [____________].

MANUFACTURERS - PREDECORATED GYPSUM BOARD

Manufacturers:

[_________________________________] Model [________].

[_________________________________] Model [________].

[_________________________________] Model [________].

Gypsum Board: ASTM C36; [standard] [fire rated] type; [3/8] [1/2] [5/8] inches ([10] [13] [16] mm) thick, maximum permissible length; paper bound edges and ends square cut.

Predecorated Facing:	Sheet vinyl, [fabric reinforced,] flame and smoke rated for [____ / ____] in accordance with ASTM E119; [________] color [as selected].

Batten Joints: [Manufacturer's standard type.] [________.]

ACCESSORIES

Acoustical Insulation: [ASTM C665]; preformed glass fiber, friction fit type, unfaced, [[____] inch ([____] mm) thick.]

Acoustical Sealant: Non-hardening, non-skinning, for use in conjunction with gypsum board; [________] manufactured by [____________].

Corner Beads: [Metal.] [Metal and paper combination.]

Edge Trim: GA 201 and GA 216; Type [LC] [L] [LK] [U exposed reveal] bead.

Joint Materials:	[ASTM C475;] [GA 201 and GA 216;] reinforcing tape, joint compound, adhesive, and water.

Textured Finish Materials: [Latex based texturing material,] [containing [silver] [gold] color metallic glitter,] [containing fine aggregate,] [________]; [________] manufactured by [____________].

Fasteners:	ASTM C1002, Type [S12] [W] [and GA-216].

PART 3 EXECUTION

EXAMINATION

Verify site conditions under provisions of Section [01039.] [________.]

Verify that site conditions are ready to receive work and opening dimensions are as [indicated on shop drawings.] [instructed by the manufacturer.]

METAL STUD INSTALLATION

Install studs in accordance with [ASTM C754.] [GA-201, GA- 216 [and GA-600].] [manufacturer's instructions.]

Metal Stud Spacing: [12] [16] [24] [____] inches ([300] [400] [600] [____] mm) on center.

Extend stud framing to ceiling only.	Attach ceiling runner securely to [acoustical ceiling track] [ceiling framing] in accordance with [manufacturer's instructions.] [details indicated.]

****** [OR] ******

Refer to Drawings for indication of partitions extend stud framing through the ceiling to the structure above. Maintain clearance under structural building members to avoid deflection transfer to studs. Provide extended leg ceiling runners.

****** [OR] ******

Refer to Drawings for indication of partitions extending to finished ceiling only and for partitions extending through the ceiling to the structure above. Maintain clearance under structural building members to avoid deflection transfer to studs. Provide extended leg ceiling runners.

Door Opening Framing: Install double studs at door frame jambs. [Install stud tracks on each side of opening, at frame head height, and between studs and adjacent studs.]

Blocking: [Nail wood blocking to studs.] [Bolt or screw steel channels to studs.] Install blocking for support of [plumbing fixtures,] [toilet partitions,] [wall cabinets,] [toilet accessories,] [hardware,] and [________.]

WALL FURRING INSTALLATION

Erect wall furring for direct attachment to [concrete block] [________] [and] [concrete] walls.

Erect furring channels [horizontally] [vertically]; space maximum [16] [24] inches ([400] [____] mm) on center, not more than [4] [____] inches ([100] [____] mm) from [floor and ceiling lines.] [abutting walls.] Secure in place on alternate channel flanges at maximum [24] [____] inches ([600] [____] mm) on center.

****** [OR] ******

Install thermal insulation in conjunction with Section [07213] [________] [between Z-furring channels] directly attached to [concrete masonry] [____] [and] [concrete] walls in accordance with manufacturer's instructions.

****** [OR] ******

Install thermal insulation in conjunction with Section [07213] [________] vertically and hold in place with Z-furring channels spaced maximum 24 inches (600 mm) on center, not more than 3 inches (75 mm) from external corners and 12 inches (300 mm) at internal corners. Secure Z-furring channels maximum 24 inches (600 mm) on center.

Erect free-standing metal stud framing [tight to] [spaced [____] inches ([____] mm) from] [concrete] [concrete masonry] [________] walls, attached by adjustable furring brackets in accordance with manufacturer's instructions.

FURRING FOR FIRE RATINGS

Install furring as required for fire resistance ratings indicated [and to GA-600 requirements].

SHAFT WALL INSTALLATION

Shaft Wall Framing: [In accordance with manufacturer's installation instructions.] [________.] [To GA-600 requirements.]

CEILING FRAMING INSTALLATION

Install in accordance with [ASTM C754.] [GA 201 and GA 216.] [manufacturer's instructions.]

Coordinate location of hangers with other work.

Install ceiling framing independent of walls, columns, and above ceiling work.

Reinforce openings in ceiling suspension system which interrupt main carrying channels or furring channels, with lateral channel bracing. Extend bracing minimum [24] [____] inches ([600] [____] mm) past each end of openings.

Laterally brace entire suspension system.

ACOUSTICAL ACCESSORIES INSTALLATION

Install resilient channels at maximum [24] [____] inches ([600] [____] mm) on center. [Locate joints over framing members.]

Place acoustical insulation in partitions tight within spaces, around cut openings, behind and around electrical and mechanical items within or behind partitions, and tight to items passing through partitions.

Install acoustical sealant within partitions in accordance with manufacturer's instructions.

****** [OR] ******

Install acoustical sealant at gypsum board perimeter at:

Metal Framing: [One] [Two] beads.

[Base Layer.]

[Face Layer.]

Calk all penetrations of partitions by conduit, pipe, duct work, rough-in boxes, and [________].

GYPSUM BOARD INSTALLATION

Install gypsum board in accordance with [GA-201, GA-216 [and GA-600].] [manufacturer's instructions.]

Erect single layer [standard gypsum] [________] board [in most economical direction] [horizontal] [vertical], with ends and edges occurring over firm bearing.

Erect single layer fire rated gypsum board [vertically], with edges and ends occurring over firm bearing.

[Erect exterior gypsum sheathing horizontally, with edges butted tight and ends occurring over firm bearing.]

Use screws when fastening gypsum board to metal furring or framing.

****** [OR] ******

Use [nails] [or] [screws] when fastening gypsum board to wood furring or framing. [Staples may only be used when securing the first layer of double layer applications.]

Double Layer Applications: Use gypsum backing board for first layer, placed [perpendicular] [parallel] to framing or furring members. [Use fire rated gypsum backing board for fire rated partitions.]

****** [OR] ******

Double Layer Applications: Secure second layer to first with [fasteners.] [adhesive and sufficient support to hold in place.] [Apply adhesive in accordance with manufacturer's instructions.]

Place second layer [perpendicular] [parallel] to first layer. Offset joints of second layer from joints of first layer.

Erect exterior gypsum soffit board perpendicular to supports, with staggered end joints over supports.

Treat cut edges and holes in [moisture resistant gypsum board] [and] [exterior gypsum soffit board] with sealant.

Place control joints consistent with lines of building spaces [as indicated.] [as directed.]

Place corner beads at external corners [as indicated.] Use longest practical length. Place edge trim where gypsum board abuts dissimilar materials [as indicated.]

Install backing board over [metal studs] [plywood sheet] [gypsum board] [________] in accordance with manufacturer's instructions.

Apply gypsum board to curved walls [in accordance with GA- 216.] [________.]

JOINT TREATMENT

Tape, fill, and sand exposed joints, edges, and corners to produce smooth surface ready to receive finishes.

Feather coats onto adjoining surfaces so that camber is maximum [1/32] [1/16] inch ([0.8] [1.6] mm).

Taping, filling, and sanding is not required at surfaces behind [adhesive applied ceramic tile.] [________.]

Tape joints and corners of cementitious backing board.

TEXTURE FINISH

[Spray] [Trowel] [Roller] [Brush] [________] apply finish texture coating in accordance with manufacturer's instructions.

PREDECORATED GYPSUM BOARD FINISH

Erect predecorated gypsum board vertically, with exposed batten fastening system.

Erect in accordance with manufacturer's instructions.

TOLERANCES

Maximum Variation of Finished Gypsum Board Surface from True Flatness: [1/8] [____] inch in 10 feet ([3] [____] mm in 3 m) in any direction.

END OF SECTION