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HomeMy WebLinkAbout11035 061600 fl - sheathing.pdfDUNKIN’ DONUTS REBUILD CARMEL, INDIANA © McComas Engineering, Inc. SHEATHING 061600 - 1 SECTION 061600 - SHEATHING PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section Includes: 1. Wall sheathing. 2. Roof sheathing. B. Related Requirements: 1. Division 06 Section "Rough Carpentry" for plywood backing panels. 2. Division 07 Section "Weather Barriers" for water-resistive barrier applied over wall sheathing. 1.3 QUALITY ASSURANCE A. Testing Agency Qualifications: For testing agency providing classification marking for fire- retardant-treated material, an inspection agency acceptable to authorities having jurisdiction that periodically performs inspections to verify that the material bearing the classification marking is representative of the material tested. 1.4 DELIVERY, STORAGE, AND HANDLING A. Stack panels flat with spacers beneath and between each bundle to provide air circulation. Protect sheathing from weather by covering with waterproof sheeting, securely anchored. Provide for air circulation around stacks and under coverings. PART 2 - PRODUCTS 2.1 WOOD PANEL PRODUCTS A. Plywood: Either DOC PS 1 or DOC PS 2 unless otherwise indicated. B. Thickness: As needed to comply with requirements specified, but not less than thickness indicated. DUNKIN’ DONUTS REBUILD CARMEL, INDIANA © McComas Engineering, Inc. SHEATHING 061600 - 2 C. Factory mark panels to indicate compliance with applicable standard. 2.2 WALL SHEATHING A. Glass-Mat Gypsum Wall Sheathing: ASTM C 1177/1177M. 1. Products: Subject to compliance with requirements, provide the following: a. G-P Gypsum Corporation; Dens-Glass Gold. 2. Type and Thickness: Type X, 5/8 inch (15.9 mm) thick. 3. Size: 48 by 120 inches (1219 by 3048 mm) 1200 by 3050 mm for vertical installation. 2.3 ROOF SHEATHING A. Plywood Roof Sheathing: Exposure 1, Structural I sheathing. 1. Span Rating: Not less than 24/0. 2. Nominal Thickness: Not less than 5/8 inch (16 mm). 2.4 FASTENERS A. General: Provide fasteners of size and type indicated that comply with requirements specified in this article for material and manufacture. 1. For roof and wall sheathing, provide fasteners with hot-dip zinc coating complying with ASTM A 153/A 153M. B. Nails, Brads, and Staples: ASTM F 1667. C. Power-Driven Fasteners: NES NER-272. D. Wood Screws: ASME B18.6.1. PART 3 - EXECUTION 3.1 INSTALLATION, GENERAL A. Do not use materials with defects that impair quality of sheathing or pieces that are too small to use with minimum number of joints or optimum joint arrangement. Arrange joints so that pieces do not span between fewer than three support members. B. Cut panels at penetrations, edges, and other obstructions of work; fit tightly against abutting construction unless otherwise indicated. C. Securely attach to substrate by fastening as indicated, complying with the following: DUNKIN’ DONUTS REBUILD CARMEL, INDIANA © McComas Engineering, Inc. SHEATHING 061600 - 3 1. NES NER-272 for power-driven fasteners. 2. Table 2304.9.1, "Fastening Schedule," in ICC's "International Building Code." D. Use common wire nails unless otherwise indicated. Select fasteners of size that will not fully penetrate members where opposite side will be exposed to view or will receive finish materials. Make tight connections. Install fasteners without splitting wood. E. Coordinate wall and roof sheathing installation with flashing and joint-sealant installation so these materials are installed in sequence and manner that prevent exterior moisture from passing through completed assembly. F. Coordinate sheathing installation with installation of materials installed over sheathing so sheathing is not exposed to precipitation or left exposed at end of the workday when rain is forecast. 3.2 WOOD STRUCTURAL PANEL INSTALLATION A. General: Comply with applicable recommendations in APA Form No. E30, "Engineered Wood Construction Guide," for types of structural-use panels and applications indicated. B. Fastening Methods: Fasten panels as indicated below: 1. Roof Sheathing: a. Nail to wood framing. b. Space panels 1/8 inch (3 mm) apart at edges and ends. 3.3 GYPSUM SHEATHING INSTALLATION A. Comply with GA-253 and with manufacturer's written instructions. 1. Fasten gypsum sheathing to wood framing with screws. 2. Install boards with a 3/8-inch (9.5-mm) gap where non-load-bearing construction abuts structural elements. 3. Install boards with a 1/4-inch (6.4-mm) gap where they abut masonry or similar materials that might retain moisture, to prevent wicking. B. Apply fasteners so heads bear tightly against face of sheathing, but do not cut into facing. C. Horizontal Installation: Install sheathing with V-grooved edge down and tongue edge up. Interlock tongue with groove to bring long edges in contact with edges of adjacent boards without forcing. Abut ends of boards over centers of studs, and stagger end joints of adjacent boards not less than one stud spacing. Attach boards at perimeter and within field of board to each steel stud. 1. Space fasteners approximately 8 inches (200 mm) o.c. and set back a minimum of 3/8 inch (9.5 mm) from edges and ends of boards. DUNKIN’ DONUTS REBUILD CARMEL, INDIANA © McComas Engineering, Inc. SHEATHING 061600 - 4 D. Vertical Installation: Install board vertical edges centered over studs. Abut ends and edges of each board with those of adjacent boards. Attach boards at perimeter and within field of board to each stud. 1. Space fasteners approximately 8 inches (200 mm) o.c. and set back a minimum of 3/8 inch (9.5 mm) from edges and ends of boards. E. Seal sheathing joints according to sheathing manufacturer's written instructions. 1. Apply glass-fiber sheathing tape to glass-mat gypsum sheathing joints and apply and trowel silicone emulsion sealant to embed entire face of tape in sealant. Apply sealant to exposed fasteners with a trowel so fasteners are completely covered. Seal other penetrations and openings. END OF SECTION 061600