Specs - 09 29 00 - GYPSUM BOARD.pdf

GYPSUM BOARD - 09 28 00 - Page 1

SECTION 09 29 00

GYPSUM BOARD

PART 1 GENERAL

1.01 REFERENCES

The publications referenced within this specification are referred to by the basic designation only.

A. ASTM INTERNATIONAL (ASTM)

a. C1047 (2010a) Standard Specification for Accessories for

Gypsum Wallboard and Gypsum Veneer Base

b. C1396/C1396M (2011) Standard Specification for Gypsum Board

c. C475/C475M (2002; R 2007) Joint Compound and Joint Tape for Finishing Gypsum Board

d. C645 (2011a) Standard Specification for Nonstructural

Steel Framing Members

e. C840 (2008) Application and Finishing of Gypsum Board

f. C954 (2010) 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

B. GYPSUM ASSOCIATION (GA)

a. GA 214 (2007) Recommended Levels of Gypsum Board

Finish

b. GA 216 (2010) Application and Finishing of Gypsum Panel Products

1.02 SUBMITTALS

A. Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for information only. Submit the following in accordance with the Statement of Work, SUBMITTALS:

a. SD-01 Preconstruction Submittals

1. Material Safety Data Sheets

b. SD-03 Product Data

1. Gypsum Board

2. Accessories

3. Studs, Tracks, Furring and Fasteners

PART 2 PRODUCTS

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2.01 MATERIALS

A. Gypsum wallboard manufacturers

a. United States Gypsum Company

b. National Gypsum Company

c. G-P Gypsum Corporation

B. Gypsum wallboard

a. ASTM C1396/C1396M, Type X, 48 inch wide, 5/8 inch thick unless otherwise notes, non-sag for ceiling installations, tapered edges.

C. Joint Treatment Materials

a. ASTM C475/C475M, SHEETROCK or Durabond Joint System.

D. Fasteners

a. ASTM C 954, steel type S-12 bugle head screws for fastening gypsum board to steel framing members 0.033 to 0.112 inches thick. Except where shown or specified, select fasteners of type, size, style, grade, and class required for secure installation of framing and furring.

Galvanize all fasteners and accessories.

E. Accessories

a. 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.

F. Metal Framing Studs

a. ASTM C645, [6] inch wide, [16] inch o.c., 20 gage galvanized steel with additional framing members, reinforcing, accessories, and anchors necessary for the complete framing system

PART 3 EXECUTION

3.01 APPLICATION OF GYPSUM BOARD

A. Apply gypsum board to framing and furring members 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.

B. In vertical application of gypsum board, provide panels in lengths required to reach full height of vertical surfaces in one continuous piece.

C. Surfaces of gypsum board and substrate members may be bonded together with an adhesive. Treat edges of cutouts for plumbing pipes, screwheads, and joints with water-resistant compound as recommended by the gypsum board manufacturer.

D. Provide type of gypsum board for use in each system specified herein as indicated.

3.02 FINISHING OF GYPSUM BOARD

A. Tape and finish gypsum board in accordance with ASTM C840, GA 214 and GA 216. Unless otherwise specified, finish all gypsum board walls, partitions and ceilings to Level 4 in accordance with GA 214. Provide joint, fastener depression, and corner treatment. Tool joints as smoothly as possible to minimize sanding and dust.

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B. Do not use fiber glass mesh tape with conventional drying type joint compounds; use setting or hardening type compounds only.

3.03 STEEL FRAMING

A. Installation

a. Align tracks accurately at floor and ceiling. Secure tracks as recommended by the framing manufacturer for the upper and lower construction involved, except do not exceed 24 inches o.c. spacing for nail or powder-driven fasteners, or 16 inches o.c for other types of attachment.

Provide fasteners approximately 2 inches from corners and ends of tracks.

b. Position studs vertically and engage both upper and lower tracks. Space studs 16 inches on center, unless otherwise indicated on the Drawings. Fasten studs to track flanges with screws or by crimping.

c. Use full length studs between tracks wherever possible. If necessary, splice studs with a minimum 8 inch nested lap and fasten with two screws per stud flange.

d. Install additional studs to support inside corners at intersections and corners, and to support outside corners, terminations of partitions, and both sides of control joints (if any).

e. Terminate partitions at finish ceiling line unless otherwise indicated on the Drawings.

f. Install rough framing at openings consisting of full-length studs adjacent to jambs and horizontal header and sill tracks. Cut horizontal tracks to length and split flanges and bend webs at ends for flange overlap and screw to jamb studs. Install intermediate studs between jamb studs at head and sill sections, at same spacing as full-length studs.

g. At door frames, install rough framing as specified above. Install jamb studs to comply with framing manufacturer's recommendations for the types of frames and weights of doors required. Fasten jamb studs to metal frames with anchor clips using 2 self tapping screws or bolts per clip. Where wood frames are shown, fasten jamb studs to rough framing with screws.

h. Where double doors, or doors weighing more than 50 lb are shown or scheduled, install two studs at each jamb and one additional stud not more than 6 inches from jamb studs.

i. Where vertical control joints are shown at jamb lines, install additional vertical studs located on opening side of jambs and not less than 1/2 inch from jamb studs. Do not fasten the additional studs to tracks or jamb studs.

B. Tolerances

a. Do not exceed 1/8 inch in 8 feet variation from plumb or level in any exposed line or surface, except at joints between boards do not exceed 1/16 inch variation between planes or abutting edges or ends. Shim as required to comply with specified tolerances.

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