HomeMy WebLinkAbout06160.pdf BICKFORD OF CARMEL, IN 12/12/2012
SHEATHING 06160 - 1
SECTION 06160 - SHEATHING
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. This Section includes the following:
1. Wall sheathing.
2. Roof sheathing.
3. Subflooring.
4. Building wrap.
5. Sheathing joint-and-penetration treatment.
6. Flexible flashing at openings in sheathing.
B. Related Sections include the following:
1. Division 6 Section "Rough Carpentry" for plywood backing panels.
1.3 SUBMITTALS
A. Product Data: For each type of process and factory-fabricated product. Indicate component
materials and dimensions and include construction and application details.
1. Include data for wood-preservative treatment from chemical treatment manufacturer and
certification by treating plant that treated plywood complies with requirements. Indicate
type of preservative used and net amount of preservative retained.
2. Include data for fire-retardant treatment from chemical treatment manufacturer and
certification by treating plant that treated plywood complies with requirements. Include
physical properties of treated materials.
3. For products receiving a waterborne treatment, include statement that moisture content
of treated materials was reduced to levels specified before shipment to Project site.
4. Include copies of warranties from chemical treatment manufacturers for each type of
treatment.
5. For building wrap, include data on air-/moisture-infiltration protection based on testing
according to referenced standards.
B. Research/Evaluation Reports: For the following, showing compliance with building code in
effect for Project:
1. Preservative-treated plywood.
2. Fire-retardant-treated plywood.
3. Foam-plastic sheathing.
4. Building wrap.
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1.4 DELIVERY, STORAGE, AND HANDLING
A. Stack plywood and other panels flat with spacers between each bundle to provide air
circulation. Provide for air circulation around stacks and under coverings.
PART 2 - PRODUCTS
2.1 WOOD PANEL PRODUCTS, GENERAL
A. Plywood: Either DOC PS 1 or DOC PS 2, unless otherwise indicated.
B. Oriented Strand Board: DOC PS 2.
C. Thickness: As needed to comply with requirements specified, but not less than thickness
indicated.
D. Factory mark panels to indicate compliance with applicable standard.
2.2 PRESERVATIVE-TREATED PLYWOOD
A. Preservative Treatment by Pressure Process: AWPA C9.
1. Preservative Chemicals: Acceptable to authorities having jurisdiction and containing no
arsenic or chromium.
B. Mark plywood with appropriate classification marking of an inspection agency acceptable to
authorities having jurisdiction.
C. Application: Treat items indicated on Drawings and plywood in contact with masonry or
concrete.
2.3 FIRE-RETARDANT-TREATED PLYWOOD
A. General: Comply with performance requirements in AWPA C27.
1. Use treatment that does not promote corrosion of metal fasteners.
2. Use Exterior type for exterior locations and where indicated.
B. Kiln-dry material after treatment to a maximum moisture content of 15 percent. Do not use
material that is warped or does not comply with requirements for untreated material.
C. Identify fire-retardant-treated plywood with appropriate classification marking of UL, U.S.
Testing, Timber Products Inspection, or another testing and inspecting agency acceptable to
authorities having jurisdiction.
D. Application: Treat plywood indicated on Drawings.
2.4 WALL SHEATHING
A. Oriented-Strand-Board Wall Sheathing: Exposure 1, Structural I sheathing.
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1. Span Rating: Not less than 24/0.
2. Nominal Thickness: Not less than 1/2 inch (13 mm).
B. Paper-Surfaced Gypsum Wall Sheathing: ASTM C 79/C 79M or ASTM C 1396/C 1396M,
gypsum sheathing; with water-resistant-treated core and with water-repellent paper bonded to
core's face, back, and long edges.
1. Available Manufacturers: Subject to compliance with requirements, manufacturers
offering products that may be incorporated into the Work include, but are not limited to,
the following:
2. Manufacturers: Subject to compliance with requirements, provide products by one of the
following:
a. American Gypsum.
b. LaFarge North America Inc.
c. G-P Gypsum Corporation.
d. National Gypsum Company.
e. Temple-Inland Forest Products Corporation.
f. United States Gypsum Co.
3. Type and Thickness: Type X, 5/8 inch (15.9 mm) thick.
4. Edge and End Configuration: Square.
5. Size: 24 by 96 inches (610 by 2438 mm) for horizontal 48 by 96 inches (1219 by 2438
mm) for vertical installation.
2.5 ROOF SHEATHING
A. Oriented-Strand-Board Roof Sheathing: Exposure 1, Structural I sheathing.
1. Span Rating: Not less than 24/0.
2. Nominal Thickness: Not less than 5/8 inch.
2.6 SUBFLOORING AND UNDERLAYMENT
A. Oriented-Strand-Board Subflooring: Exposure 1, Structural I sheathing.
1. Span Rating: Not less than 24 o.c..
2. Nominal Thickness: Not less than 23/32 inch (18.3 mm).
2.7 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.
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2.8 WEATHER-RESISTANT SHEATHING PAPER
A. Building Wrap: ASTM E 1677, Type I air retarder; with flame-spread and smoke-developed
indexes of less than 25 and 450, respectively, when tested according to ASTM E 84; UV
stabilized; and acceptable to authorities having jurisdiction.
1. Available Products: Subject to compliance with requirements, products that may be
incorporated into the Work include, but are not limited to, the following:
2. Products: Subject to compliance with requirements, provide one of the following:
a. Dow Chemical Company (The); Styrofoam Weathermate Plus Brand Housewrap.
b. DuPont (E. I. du Pont de Nemours and Company); Tyvek HomeWrap.
c. Raven Industries Inc.; Rufco-Wrap.
d. Reemay, Inc.; Typar HouseWrap.
3. Water-Vapor Permeance: Not less than 152 g through 1 sq. m of surface in 24 hours per
ASTM E 96, Desiccant Method (Procedure A).
4. Allowable UV Exposure Time: Not less than three months.
B. Building-Wrap Tape: Pressure-sensitive plastic tape recommended by building-wrap
manufacturer for sealing joints and penetrations in building wrap.
2.9 MISCELLANEOUS MATERIALS
A. Adhesives for Field Gluing Panels to Framing: Formulation complying with APA AFG-01 that is
approved for use with type of construction panel indicated by manufacturers of both adhesives
and panels.
1. Use adhesives that have a VOC content of 70 g/L or less when calculated according to
40 CFR 59, Subpart D (EPA Method 24).
B. Primer for Flexible Flashing: Product recommended by manufacturer of flexible flashing for
substrate.
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.
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:
1. NES NER-272 for power-driven fasteners.
2. Table 2304.9.1, "Fastening Schedule," in ICC's "International Building Code."
3. Table 23-II-B-1, "Nailing Schedule," and Table 23-II-B-2, "Wood Structural Panel Roof
Sheathing Nailing Schedule," in ICBO's "Uniform Building Code."
4. Table 2305.2, "Fastening Schedule," in BOCA's "BOCA National Building Code."
5. Table 2306.1, "Fastening Schedule," in SBCCI's "Standard Building Code."
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6. Table R602.3(1), "Fastener Schedule for Structural Members," and Table R602.3(2),
"Alternate Attachments," in ICC's "International Residential Code for One- and Two-
Family Dwellings."
7. Table 602.3(1), "Fastener Schedule for Structural Members," and Table 602.3(2),
"Alternate Attachments," in ICC's "International One- and Two-Family Dwelling 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. E30S, "Engineered Wood
Construction Guide," for types of structural-use panels and applications indicated.
B. Fastening Methods: Fasten panels as indicated below:
1. Subflooring:
a. Glue and nail to wood framing.
b. Space panels 1/8 inch (3 mm) apart at edges and ends.
2. Wall and 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 nails or 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 boards 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.
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1. Space fasteners approximately 8 inches (200 mm) o.c. unless noted otherwise and set
back a minimum of 3/8 inch (9.5 mm) from edges and ends of boards.
2. For sheathing under stucco cladding, boards may be initially tacked in place with screws
if overlying self-furring metal lath is screw-attached through sheathing to studs
immediately after sheathing is installed.
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. unless noted otherwise and set
back a minimum of 3/8 inch (9.5 mm) from edges and ends of boards.
2. For sheathing under stucco cladding, boards may be initially tacked in place with screws
if overlying self-furring metal lath is screw-attached through sheathing to studs
immediately after sheathing is installed.
3.4 WEATHER-RESISTANT SHEATHING-PAPER INSTALLATION
A. General: Cover sheathing with weather-resistant sheathing paper as follows:
1. Cut back barrier 1/2 inch (13 mm) on each side of the break in supporting members at
expansion- or control-joint locations.
2. Apply barrier to cover vertical flashing with a minimum 4-inch (100-mm) overlap, unless
otherwise indicated.
B. Building Wrap: Comply with manufacturer's written instructions.
1. Seal seams, edges, fasteners, and penetrations with tape.
2. Extend into jambs of openings and seal corners with tape.
3.5 PROTECTION
A. Paper-Surfaced Gypsum Sheathing: Protect sheathing by covering exposed exterior surface of
sheathing with weather-resistant sheathing paper securely fastened to framing. Apply covering
immediately after sheathing is installed.
END OF SECTION 06160