SAN DIEGO STATE UNIVERSITY PACIFIC CORNERSTONE ARCHITECTS TENOCHCA HALL PROJECT NO FAN COIL UNITS, RESTROOM AND FINISH RENOVATION

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1 SECTION GYPSUM BOARD PART 1 - GENERAL 1.1 SUMMARY A. Section Includes: 1. Various gypsum board panels types. 2. Joint treatment materials. 3. Panel trim. 4. Supplementary components and accessories necessary for a complete installation or application, whether or not such items are indicated on the Drawings or included in the Specifications. 1.2 SECTION REQUIREMENTS A. Action Submittals: Before beginning the work of this specification Section, including bulk purchase and delivery of materials or products, submit the following to the Architect for responsive action (formal review and approval). 1. Product Data. PART 2 - PRODUCTS 2.1 GYPSUM BOARD PANELS A. Fire-Resistance-Rated Gypsum Wall and Ceiling Board: 1. Applications: Installed in fire-resistance-rated and non-rated interior partition assemblies constructed in dry locations. 2. Description: Mold- and moisture-resistant gypsum-based panels conforming to ASTM C 1396; with heavy-duty mold- and moisture-resistant paper face, back, and long edges. 3. Products: a. Basis-of-Design Product: Design is based on the following. 1) SHEETROCK FIRECODE Core and SHEETROCK FIRECODE C Core gypsum panels manufactured by USG Corp. b. Acceptable Products: Other acceptable comparable products are limited to one of the following, contingent on demonstrated conformance with the Contract Documents, including the item description above. 1) ProRoc Type X and ProRoc Type C manufactured by CertainTeed Corp. 2) ToughRock Fireguard and ToughRock Fireguard C manufactured by GP Building Products. GYPSUM BOARD

2 3) Gold Bond Fire-Shield and Gold Bond Fire-Shield C manufactured by National Gypsum Co. 4. Items must conform to the following: a. Minimum Size: Provide at least 4-foot by 8-foot sheets. b. Thickness: 5/8-inch. c. Edges: Tapered long edges and square ends. d. Facers: Heavy-duty mold- and moisture-resistant paper face, back, and long edges. e. Core: 1) Provide Firecode Core (Type X) panels in wall applications, unless otherwise indicated on the Drawings. 2) Provide Firecode C Core (Type C) panels in ceiling applications, unless otherwise indicated on the Drawings. B. Mold- and Moisture-Resistant Gypsum Board: 1. Applications: Installed as the inside face of exterior wall assemblies; and in fireresistance-rated and non-rated interior partition assemblies constructed in wet locations. 2. Description: Mold- and moisture-resistant gypsum-based panels conforming to ASTM C Products: a. Basis-of-Design Product: Design is based on the following. 1) SHEETROCK Mold Tough gypsum panels manufactured by USG Corp. b. Acceptable Products: Other acceptable comparable products are limited to one of the following, contingent on demonstrated conformance with the Contract Documents, including the item description above. 1) ProRoc Moisture and Mold Resistant Gypsum board with M2Tech manufactured by CertainTeed Corp. 2) ToughRock Mold-Guard manufactured by GP Building Products. 3) Gold Bond XP Gypsum Board manufactured by National Gypsum Co. 4. Items must conform to the following: a. Minimum Size: Provide at least 4-foot by 8-foot sheets. b. Thickness: 5/8-inch. c. Edges: Tapered long edges and square ends. d. Facers: Heavy-duty mold- and moisture-resistant paper face, back, and long edges. 2.2 JOINT TREATMENT MATERIALS A. Joint Tape: 1. Description: Nominal 2-inch wide gypsum panel joint and corner reinforcement conforming to ASTM C Products: GYPSUM BOARD

3 a. Fiberglass Joint Tape: Provide SHEETROCK Fiberglass Drywall Tape manufactured by USG Corp., or equal. b. Paper Joint Tape: Provide BEADEX Drywall Joint Tape manufactured by USG Corp., or equal. c. Fiberglass Mesh Tape: Not permitted. B. Tape Bonding Materials: 1. Setting-Type Joint Compound: a. Applications: 1) Pre-Filling Gypsum Panel Joints throughout the Project: Use setting-type compound for open joints, beveled panel edges, and at damaged surface areas and at all locations. 2) All Other Coats: Use setting-type compound for embedding and first coat, fill coat, finish coat, and skim coat at wet locations, and at locations where panels are subject to moisture and high humidity. b. Description: Sandable, chemically setting powder compound conforming to ASTM C 475, and used for embedding joint tape, finishing interior gypsum panels, and laminating gypsum panels to gypsum panels. c. Products: 1) Basis-of-Design Products: Design is based on the following. a) SHEETROCK DURABOND setting-type and SHEETROCK Easy Sand lightweight setting-type joint compounds manufactured by USG Corp. 2) Acceptable Manufacturers: Other acceptable sources of comparable products are limited to one of the following, contingent on demonstrated conformance to the Contract Documents, including the item description above. a) CertainTeed Corp. b) GP Building Products. c) Hamilton Drywall Products. d) Murco Wall Products, Inc. 2. Drying-Type Joint Compound: a. Application: Use for embedding and first coat, fill coat, finish coat, and skim coat at dry locations, and at locations where joint is subject to moisture and high humidity. b. Description: Vinyl-type compound conforming to ASTM C 475, and used for embedding joint tape, finishing interior gypsum panels, and hand-applying simple texturing. c. Products: 1) Basis-of Design Products: Design is based on the following. a) SHEETROCK All Purpose Joint Compound SELECT and SHEETROCK Brand Plus 3 Lightweight All-Purpose Joint Compound manufactured by USG Corp. 2) Acceptable Manufacturers: Other acceptable sources of comparable products are limited to one of the following, contingent on demonstrated conformance to the Contract Documents, including the item description above. GYPSUM BOARD

4 a) CertainTeed Corp. b) GP Building Products. c) Hamilton Drywall Products. d) Murco Wall Products, Inc. 2.3 METAL TRIM A. Steel Trim: 1. Description: Paper-faced galvanized steel sheet trim pieces conforming to ASTM C Products: a. Basis-of-Design Products: Design is based on the following. 1) BEADEX paper-faced metal bead and trim manufactured by USG Corp. b. Acceptable Manufacturers: Other acceptable sources of comparable products are limited to one of the following, contingent on demonstrated conformance to the Contract Documents, including the item description above. 1) CEMCO. 2) Clinch-On Cornerbead Co. 3) Stockton Products. 4) Western Metal Lath. 3. Trim Types: a. Corner Beads: Provide to protect exterior corners. Provide corner beads with notched or flexible flanges at curved edges. 1) 90-degree Outside Corner Bead: Style Micro Bead. 2) 90-degree Inside Corner Bead: Style B2. b. Casing Beads: Provide long-flanged L- or LC-beads at exposed panel edges indicated as receiving joint compound; provide short-flanged U-beads at exposed panel edges that do not receive joint compound. 1) J Trims (J-shaped with exposed long flange): Style B9J. 2) L Trims (L-shaped with exposed long flange): Style B4. B. Metal Control Joints: 1. Description: One-piece solid zinc control joint supplied with factory-applied removable tape to ensure a clean joint. 2. Products: a. Basis-of-Design Product: Design is based on the following. 1) SHEETROCK Zinc Control Joint No. 093 manufactured by USG Corp. b. Acceptable Manufacturers: Other acceptable sources of comparable products are limited to one of the following, contingent on demonstrated conformance to the Contract Documents, including the item description above. 1) Niles-093 Zinc Control Joint manufactured by Niles Building Products Co. 2) NO93 Control Joint manufactured by Alabama Metal Industries Corporation (AMICO) Building Products. GYPSUM BOARD

5 3. Items must conform to the following: a. Length: At least 10 feet long; provide longest possible lengths to avoid joints. 2.4 ACCESSORIES A. Repair Clips: SHEETROCK Drywall Repair Clips manufactured by USG Corp., or equal. B. Screw Fasteners: Provide inch shank diameter (#8-32 UNC) by at least one inch long, phosphate coated steel Philips bugle head self- piercing or self-drilling (as applicable) screw fasteners specified in Section C. Sealant: Provide acoustical joint sealant specified in Section , unless otherwise supplied, required, recommended, approved, or accepted by the manufacturer. D. Other Accessories: Provide other accessories and similar secondary items supplied, required, recommended, approved, or accepted by the manufacturer. PART 3 - EXECUTION 3.1 INSTALLATION A. General: 1. Comply with both manufacturer-prepared published and supplemental instructions, and ASTM C 840, when installing, protecting, and repairing gypsum board panel. 2. Use materials and methods required, recommended, approved, or accepted by the manufacturer, along with manufacturer-recommended accessories and techniques that do not lead to or result in any specified or other warranty becoming void. 3. If there is a conflict between the manufacturer-prepared published or supplemental instructions and ASTM C 840, then the manufacturer s instructions govern. 4. Set items plumb, level, and square, without warp or rack, with flush well-fitted joints, and in alignment with adjacent construction 5. Install panels with face side out. Butt panels together for a light contact at edges and ends with not more than 1/16 inch of open space between panels. Do not force into place. 6. Locate edge and end joints over supports, except in ceiling applications where intermediate supports or gypsum board back-blocking is provided behind end joints. a. Do not place tapered edges against cut edges or ends. b. Stagger vertical joints on opposite sides of partitions. c. Do not make joints other than control joints at corners of framed openings. 7. Form control and expansion joints with space between edges of adjoining gypsum panels. 8. Cover both faces of support framing with gypsum panels as indicated on the drawings for each wall type construction. 9. Fit gypsum panels around ducts, pipes, and conduits. GYPSUM BOARD

6 10. Unless a concealed application is indicated or required for sound, fire, air, or smoke ratings, coverage may be accomplished with scraps not less than 8 square feet in area. 11. Where partitions intersect structural members projecting below the underside of floor or roof decks, cut gypsum panels to fit profile formed by structural members; allow 1/4- to 3/8-inch- wide joints to install sealant, unless otherwise indicated. 12. Isolate perimeter of gypsum board applied to non-load-bearing partitions at structural abutments, except floors. Provide 1/4- to 1/2-inch- wide spaces at these locations, and trim edges with edge trim where edges of panels are exposed. Seal joints between edges and abutting structural surfaces with acoustical sealant. 13. Attach panels so leading edge or end of each panel is attached to open (unsupported) edges of stud flanges first. 14. Seal construction at perimeters, behind control joints, and at openings and penetrations with a continuous bead of acoustical sealant specified in Section a. Install acoustical sealant at both faces of partitions at perimeters and through penetrations. Comply with ASTM C 919 and with manufacturer's written recommendations for locating edge trim and closing off sound-flanking paths around or through assemblies, including sealing partitions above acoustical ceilings. 15. Install ceiling panels across framing to minimize the number of abutting end joints and to avoid abutting end joints in central area of each ceiling. Stagger abutting end joints of adjacent panels not less than one framing member. 16. Do not install or apply any item, material, component, or accessory in a manner that is un-warrantable by the manufacturer. B. Special Techniques: 1. Single-Layer Application: a. On ceilings, apply gypsum panels before wall or partition board application to greatest extent possible, and at right angles to framing, unless otherwise indicated. b. On partitions and walls, apply gypsum panels vertically (parallel to framing), unless otherwise indicated or required by fire-resistance-rated assemblies; minimize end joints. 1) Stagger abutting end joints not less than one framing member in alternate courses of panels. 2) At high walls, install panels horizontally, unless otherwise indicated or required by fire-resistance-rated assemblies. c. On Z-furring members, apply gypsum panels vertically (parallel to framing) with no end joints. Locate edge joints over furring members. d. Fastening Methods: Apply gypsum panels to supports with steel drill screws. 2. Multilayer Application: a. On partitions and wall assemblies, apply gypsum board indicated for base layers and face layers vertically (parallel to framing) with joints of base layers located over stud or furring member and face-layer joints offset at least one stud or GYPSUM BOARD

7 furring member with base-layer joints, unless otherwise indicated or required by fire-resistance-rated assembly. Stagger joints on opposite sides of partitions. b. On Z-furring members, apply base layer vertically (parallel to framing) and face layer either vertically (parallel to framing) or horizontally (perpendicular to framing) with vertical joints offset at least one furring member. Locate edge joints of base layer over furring members. c. Fastening Methods: Fasten base layers and face layers separately to supports with screws. Do not glue multiple layers of gypsum board together. C. Installing Trim Accessories: 1. General: For trim with back flanges intended for fasteners, attach to framing with same fasteners used for panels. Otherwise, attach trim in conformance with manufacturer's written instructions. 2. Control Joints: Install control joints in conformance with ASTM C 840 and in specific locations indicated or approved by the Architect for visual effect. 3. Trim: Install in the following locations. a. Cornerbead: Use at outside corners. B. LC-Bead or U-Bead: Use at exposed panel edges. D. Attachment: Securely attach items in place. E. Finishing Gypsum Board: 1. General: Treat gypsum board joints, interior angles, edge trim, control joints, penetrations, fastener heads, surface defects, and elsewhere as required to prepare gypsum board surfaces for decoration. Promptly remove residual joint compound from adjacent surfaces. 2. Prefill open joints, beveled edges, and damaged surface areas. 3. Apply joint tape over gypsum board joints, except those with trim having flanges not intended for tape. 3.2 GYPSUM BOARD FINISH SCHEDULE A. General: Finish gypsum board surfaces with exposed joints, corners and edges reinforced or trimmed in conformance with ASTM C 840; with the GA publication GA-214, Levels of Gypsum Board Finish; and the following. B. Levels of Gypsum Board Finish: 1. Level 0: Use for first layer of multiple layer construction and gypsum board ledge guards in elevator shafts. 2. Level 1: Use in plenum areas above ceilings, interior faces of shafts, in attics, and in areas where the assembly will generally be concealed. 3. Level 2: Not used. 4. Level 3: Not used. 5. Level 4: Use at panel surfaces that will be exposed to view, unless otherwise indicated. GYPSUM BOARD

8 6. Level 5: Not used. END OF SECTION GYPSUM BOARD