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06151wes.txt
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1998-06-22
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SECTION 06151
CEDAR DECKING
NOTE ** Western Red Cedar Lumber Association, cedar decking
NOTE **
NOTE ** This section is based on Publication 93-494 Revised
July 1997, Specifying Cedar Decking, published by
the Western Red Cedar Lumber Association (WRCLA),
whose head office is at the following address:
NOTE ** 1100/555 Burrard Street
NOTE ** Vancouver, British Columbia V7X 1S7
NOTE ** Tel: (604) 684-0266
NOTE ** Fax: (604) 682-8641
NOTE ** e-mail: WRCLA@cofiho.cofi.org
NOTE ** Website: www.wrcla.org
NOTE ** Western Red Cedar offers the advantages of natural
beauty, design flexibility, and long term
durability; it is one of the few woods with its own
preservative oils to protect against decay and
insect attack. Its freedom from pitch and resin
makes it an excellent base for protective coatings.
Its exceptional dimensional stability helps ensure
that decks stay flat and straight and resist
checking.
NOTE **
NOTE ** See other WRCLA sections for timber construction
and landscape structures, wood trim, and cedar
siding.
NOTE **
NOTE ** SECTION 06151 - CEDAR DECKING, Copyright 1998, The
Architect's Catalog, Inc.
PART 1 GENERAL
1.1 SECTION INCLUDES
NOTE ** Select paragraphs below applicable to project; add
others as required.
A. Cedar Decking.
B. Cedar Steps.
C. Cedar Seating.
D. Cedar Screens.
E. Cedar Trellises.
F. _____________________________________.
1.2 RELATED SECTIONS
NOTE ** Delete sections below not relevant to this project;
add others as required.
A. Section 06100 - Rough Carpentry.
B. Section 06139 - Timber Construction.
C. Section 06221 - Wood Trim.
D. Section _____ - _________________________.
1.3 REFERENCES
NOTE ** Delete references from the list below that are not
actually required by the text of the edited
section; add others as required.
A. Western Red Cedar Lumber Association "Product Standards."
B. __________________________________________.
1.4 DELIVERY, STORAGE, AND HANDLING
A. Inspect the materials upon delivery to assure that
specified products have been received.
B. Store materials in safe area, away from construction
traffic; store under cover and off ground, protected from
moisture.
C. Keep materials clearly separated and identified with
grade marks legible. Keep damaged material identified as
damaged and stored separately.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Acceptable Manufacturer: Member of the Western Red Cedar
Lumber Association (WRCLA). ASD.
B. Requests for substitutions will be considered in
accordance with provisions of Section 01600.
NOTE ** Delete paragraph above or below; coordinate with
Division 1 requirements.
C. Substitutions: Not permitted.
D. Provide all western red cedar from a single supplier.
2.2 MATERIALS
A. Western Red Cedar: WRCLA Western Red Cedar.
NOTE ** Select grade(s) and moisture content of Western Red
Cedar from paragraphs below as required for
project. Delete references not required for
project.
NOTE **
NOTE ** Clear grade decking is specified when appearance of
the highest quality is required; available seasoned
or unseasoned. Architect Clear(tm) grade decking
provides the ultimate in durability and appearance
when only the best will suffice. This exclusive
product is usually manufactured to individual
order. It has a fine grained heartwood appearance
with all aspects of its manufacturing and quality
control performed to the highest standards of the
lumber industry.
1. Grade: Architect Clear(tm).
NOTE ** Custom Clear(tm) grade decking combines stability,
durability, and a finely machined surface showing
limited characteristics. It can be used directly
on the job and is used for custom residences and
other applications where fine woodwork is required.
2. Grade: Custom Clear(tm).
NOTE ** Architect Knotty(tm) grade decking provides a
rustic appearance, with limited size of tight knots
and other characteristics; available seasoned or
unseasoned. The smooth, skip-free dressing over
the entire face makes it a top choice where the
beauty and charm of a knotty deck are desired.
3. Grade: Architect Knotty(tm)
NOTE ** Custom Knotty(tm) grade decking is widely used by
homeowners and builders, providing a durable, hole-
free knotty appearance and limited size and quality
of characteristics; available unseasoned only.
4. Grade: Custom Knotty(tm)
NOTE ** Select moisture content from the subparagraphs
below. Note, however, that "seasoned" is not
available for Custom Knotty(tm).
5. Moisture Content: Green (unseasoned).
6. Moisture Content: Seasoned.
B. Fasteners:
NOTE ** Hot-dipped galvanized, aluminum, and stainless
steel nails can be used to fasten Western Red Cedar
decking. Stainless steel nails are the best
choice, although hot-dipped galvanized is the most
widely used and economical.
NOTE **
NOTE ** Hot-dipped galvanized or stainless steel screws can
also be used, however stainless steel screws are
recommended. For most applications, No. 304 (18-8)
grade provides adequate corrosion resistance; for
decks exposed to salt air, use No. 316 grade.
Other types of fasteners, such as electro-plated,
are not recommended as they can rust, disintegrate,
and react adversely with the natural preservative
oils present in cedar, resulting in stains and
streaks. Copper nails also react with cedar and
should not be used.
NOTE **
NOTE ** Select fastener type from subparagraphs below or
add other type fasteners. Delete those not
required for project.
1. Nails: Hot-dipped galvanized.
2. Nails: Aluminum.
3. Nails: No. 304 stainless steel.
4. Nails: No. 316 stainless steel.
5. Screws: No. 304 stainless steel.
6. Screws: No. 316 stainless steel.
7. _______________________________.
NOTE ** Blind fastening systems create a fastener-free deck
surface. They use metal clips and/or joist top
brackets that fasten the sides or bottom of the
deck boards to the joists so that no fasteners are
visible. Consult local fastener company for
assistance and include the following paragraph if
blind fastening is required.
C. Blind Fastening System: _________________________.
PART 3 EXECUTION
3.1 PREPARATION
A. Coordinate work with related trades; scribe and cope
decking for accurate fit. Allow installation of related
work to avoid cutting and patching.
B. Select decking boards of longest possible lengths.
Discard boards that are warped, twisted, bowed, crooked,
or otherwise defective.
3.2 INSTALLATION
A. Install decking square, plumb, and level, closely fitted
and securely fastened.
NOTE ** Include the following three paragraphs if nailed
decks are allowed. Delete these paragraphs if
other fastening methods are required.
B. Use thin shanked nails with blunt points to prevent
splitting.
C. Use 3 inch (10d) nails to fasten decking with nominal
thickness of 2 inches. Use 2-1/2 inch (8d) nails to
fasten decking with nominal thickness of 1-1/4 inches
(31.7 mm). Length may be reduced by 1/4 inch (6.3 mm) if
ring or spiral shank nails are used.
D. Provide one nail per joist for deck boards 2 inches (50
mm) wide, two nails per joist for deck boards 4 inches
(100 mm) and wider.
NOTE ** Include the following paragraph if screws are
required for fastening decks.
E. Fasten deck with screws long enough to penetrate 1 inch
(25 mm) into support members. Provide 1-1/2 inches (38
mm) penetration for structural components.
NOTE ** Include the following paragraph if blind fastening
system is required for fastening decks.
F. Secure decking with blind fastening system following
manufacturer's instructions.
3.3 FIELD QUALITY CONTROL
A. Decking may be rejected, whether or not installed, for
excessive warp, twist, bow, or crook, as well as for
improper cutting or fitting.
3.4 ADJUSTING AND CLEANING
A. As work proceeds, maintain premises free of unnecessary
accumulation of tools, equipment, surplus materials, and
debris related to this work.
END OF SECTION