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REMOVE THIS OUTLINE GUIDE BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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O U T L I N E G U I D E

[DIVISION 6: WOOD AND PLASTICS]{.underline}

SECTION 06062 - WOOD-POLYMER COMPOSITE LUMBER

USE: Furnishing and installing manufactured wood-polymer composite
lumber that is shop or field fabricated for use in this project.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[[ ]{.underline}\] provide for
information to be inserted, as appropriate to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface,
**and *italics* within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately).

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED. **Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name Of The Project (upper/lower case).**
Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specifications that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST-110
or call (303) 987-6851.

F. DESIGN NOTES:

1\. **DRAWING DATA REQUIRED:**

A. Show the extent of wood-composite lumber, including size, spacing,
and dimensions of typical members. Provide details necessary to clarify
installation.

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes 10/99

Metric: Not Applicable

Technical Update: 3/00

SECTION 06062

WOOD-POLYMER COMPOSITE LUMBER

[PART 1: GENERAL]{.underline}

1.1 SUMMARY

A. Section Includes: Furnishing and installing manufactured wood-polymer
composite lumber that is shop or field fabricated for use in this
project.

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**NOTE:** THIS SPECIFICATION HAS BEEN WRITTEN TO INCLUDE ONLY
WOOD-POLYMER LUMBER (A COMBINATION OF WOOD FIBER AND PLASTIC MATERIAL)
RATHER THAN ALL-PLASTIC LUMBER. THE PRIMARY DIFFERENCES BETWEEN WOOD AND
PLASTIC MATERIALS ARE: PLASTIC EXPANDS AND CONTRACTS SIGNIFICANTLY MORE
THAN WOOD IN DIFFERENT TEMPERATURES; AND PLASTIC IS 3 TO 5 TIMES MORE
FLEXIBLE. BECAUSE WOOD-POLYMER MATERIALS CONSIST OF ABOUT 50% WOOD
FIBERS, THEY DO NOT EXPERIENCE AS MUCH THERMAL EXPANSION AS ALL-PLASTIC
LUMBER. FOR THIS REASON, WOOD-POLYMER COMPOSITES ARE RECOMMENDED, AND
ALL-PLASTIC LUMBER IS NOT INCLUDED IN THIS SPECIFICATION. ALL-PLASTIC
LUMBER MIGHT BE ACCEPTABLE WHEN USED FOR THINGS LIKE BENCHES, CAMP SITE
DELINEATORS, AND PLANTERS (DEPENDING ON THE QUALITY OF THE PRODUCT
CHOSEN), BUT IT IS RECOMMENDED THAT WOOD-POLYMER COMPOSITE LUMBER BE
USED FOR DECKING INSTALLATIONS.

INFORMATION ABOUT WOOD-POLYMER COMPOSITE LUMBER:

• abCAN ABSORB MOISTURE, THOUGH LIKELY NOT SIGNIFICANT AMOUNTS.

• abWILL FADE WHEN EXPOSED TO SUNLIGHT LIKE REGULAR LUMBER. WOOD-POLYMER
LUMBER MAY BE PAINTED OR STAINED FOR AESTHETIC REASONS (NOT NEEDED FOR
PROTECTION).

INFORMATION ABOUT ALL-PLASTIC LUMBER:

• abPLASTIC LUMBER CAN BE CREATED FROM A VARIETY OF CONSTITUENTS
(MULTIPLE TYPES OF RECYCLED PLASTIC). THE HIGHER QUALITY LUMBERS THAT
PERFORM MORE PREDICTABLY ARE THOSE MADE FROM ONLY ONE TYPE OF PLASTIC,
RATHER THAN A "COMMINGLED" PRODUCT MADE WITH SEVERAL TYPES OF PLASTIC.
THE PLASTIC SHOULD ALSO BE CLEANED (PURIFIED) PRIOR TO MANUFACTURING THE
LUMBER. SO, THE BEST (AND MORE EXPENSIVE) PRODUCTS ARE PURIFIED PLASTIC
LUMBER USING A SINGLE POST-CONSUMER PLASTIC, SUCH AS HDPE.

• abALL MANUFACTURERS CLAIM THAT THEIR MATERIALS WILL NOT WARP, BUT
EXPERIENCE WITH VARIOUS PRODUCTS HAS PROVED OTHERWISE, SO IT IS
DIFFICULT TO KNOW WHOSE CLAIMS ARE VALID

• abTHE COLOR OF PLASTIC LUMBER IS SUBJECT TO FADING. STABILIZED
UV-GRADED PIGMENTS ARE AVAILABLE, BUT EVEN WITH SUCH ADDITIVES, THE
PIGMENTS USED TO CREATE CERTAIN COLORS MAY FADE. IN GENERAL, GRAYS,
BLACKS, AND EARTH TONES ARE MORE COLORFAST.

• abIT IS VERY DIFFICULT TO IMPOSSIBLE TO PAINT PLASTIC LUMBER.

• abIT WILL NOT ABSORB ANY MOISTURE.

• abIN MULTIPLE PUBLICATIONS, IT IS SAID THAT YOU TRULY GET WHAT YOU PAY
FOR.

WOOD-POLYMER COMPOSITE LUMBER MANUFACTURERS: THERE ARE TWO KNOWN (AND
THERE MAY BE OTHERS) WOOD-POLYMER COMPOSITE PRODUCTS: TREX (TREX
COMPANY, 20 SOUTH CAMERON STREET, WINCHESTER, VA 22601, 540-678-4078),
AND ChoiceDek (ADVANCED ENVIRONMENTAL RECYCLING TECHNOLOGIES, INC., FM
2169HC 10, BOX 116, JUNCTION, TX 76849, 915‑446‑3430). THE BIG
DIFFERENCE BETWEEN THE TWO PRODUCTS ARE THE CROSS-SECTIONAL PROFILE.
TREX HAS A RECTANGULAR PROFILE, WHILE ChoiceDek HAS A CORRUGATED BOTTOM
SURFACE. THE CORRUGATED BOTTOM SURFACE AFFECTS THE APPEARANCE FROM THE
SIDE, BUT ALSO MAKES THE PRODUCT LIGHTER WEIGHT (BOTH ARE SIGNIFICANTLY
HEAVIER AND MORE DIFFICULT TO MOVE THAN REAL WOOD). THE SECOND PRIMARY
DIFFERENCE IS THE SURFACE. ChoiceDek HAS A ROUGHER, NON-SLIP SURFACE
THAN TREX, WHICH HAS A SMOOTH, MORE UNIFORM SURFACE, BOTH PRODUCTS ARE
CONSIDERED SLIP RESISTANT.

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B. Related Sections:

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LIST ITEMS OF WORK THAT MIGHT LOGICALLY BE FURNISHED AND INSTALLED UNDER
THIS SECTION, BUT INSTEAD ARE SPECIFIED IN ANOTHER SECTION. THIS ARTICLE
IS RARELY REQUIRED.

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1.2 SUBMITTALS

A. General: Submittals shall be according to \[Section 01009 ‑ General
Information and Requirements.\] \[Section 01330 ‑ Submittal
Procedures.\] \[and\] \[Section 01331 ‑ Certificates.\]

B. Manufacturer's Literature: Submit \[\_\_\] copies of the
manufacturer's descriptive data for the wood-polymer composite lumber to
be used on this project. Include the physical and mechanical properties,
and delivery, storage, handling, and installation instructions.

1.3 DELIVERY, STORAGE, AND HANDLING

A. Deliver, store, and handle material in accordance with manufacturer's
recommendations.

[PART 2: PRODUCTS]{.underline}

2.1 MATERIALS

A. Wood-Polymer Composite Members: Shall be a composite lumber product
with the following salient characteristics:

1\. Homogeneous blend of 50-60 percent wood fiber and 40-50 percent
polyethylene.

2\. Manufactured by continuous extrusion process without additives,
binders, or fillers.

3\. Sizes: According to drawings.

4\. Minimum Modulus of Elasticity: ASTM D 4761, minimum of 175,000 psi
(1200 MPa) ultimate, 100,000 psi (690 MPa) design

5\. Minimum Compression Perpendicular to Grain: ASTM D 143, minimum 1250
psi (8.62 MPa) ultimate 625 psi (431 MPa) design

6\. Minimum Tensile Strength: ASTM D 198, minimum of 850 psi (5.86 MPa)
ultimate 250 psi (1.73 MPa design

7\. Shear Strength: ASTM 0143, minimum if 560 psi (386 MPa) ultimate,
200 psi (1.38 MPa) design

8\. Maximum Water Absorption (unsanded surface): 1.7 percent

9\. Maximum Water Absorption (sanded surface): ASTM D 1037, maximum
value of 4 percent

10\. Maximum Expansion/Contraction Properties: 2.2x10^-5^ in/in/FE
(1.2x10^-5^ mm/mm/CE)

B. Installation Materials: Hot-dipped galvanized or stainless steel
fasteners shall be according to Section 06100 - Rough Carpentry.

C. Cement and Epoxy: PVC cement or two-part epoxy for outside use. Use
of methyl ethyl ketone or other chemicals harmful to polyethylene is not
allowed.

D. \[Paint\] \[Stain\]: Use a type of \[paint\] \[stain\] recommended by
the wood-polymer composite lumber supplier and in accordance with
\[Section 09910 - Exterior Painting\] \[Section 09915 - Exterior and
Interior Painting\].

[PART 3: EXECUTION]{.underline}

3.1 INSTALLATION

A. General: Spacing, cutting, nailing, fastening, and drilling
wood-polymer composite materials shall be according to manufacturer's
printed instructions.

3.2 \[PAINTING\] \[STAINING\]

A. Preparation: Prior to \[painting\] \[staining\], allow the composite
lumber to fade (approximately 8-12 weeks). Thoroughly clean the surface
of the lumber in accordance with the manufacturer's written
instructions.

B. Application of \[Paint\] \[Stain\]: See \[Section 09910 - Exterior
Painting\] \[Section 09915 - Exterior and Interior Painting\].

[PART 4: MEASUREMENT AND PAYMENT]{.underline}

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WHEN A \"LUMP SUM\" CONTRACT IS USED, DELETE THE TITLE PART 4:
MEASUREMENT AND PAYMENT, AND BOTH ARTICLES FROM THIS SECTION.
MEASUREMENT AND PAYMENT WILL BE ADDRESSED IN PART 4 OF SECTION 01009 -
GENERAL INFORMATION AND REQUIREMENTS OR SECTION 01010 - SUMMARY OF WORK.

WHEN NOT A \"LUMP SUM\" CONTRACT, SELECT APPLICABLE PHRASES; USE THE
\"NO MEASUREMENT\" PHRASE WHEN THE PAY ITEM IN THIS SECTION IS NOT
INCLUDED IN THE BID SCHEDULE.

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4.1 METHOD OF MEASUREMENT

A. Units: The work described in this section will \[not be measured for
payment.\] \[be measured and paid for\] \[on a lump sum basis.\] \[by
the board foot of installed lumber when construction of the item has
been completed and the Contracting Officer has accepted the work.\] \[No
payment will be made for wood-polymer composite lumber placed beyond the
lines and grades shown.\]

4.2 BASIS OF PAYMENT

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WHEN NOT A \"LUMP SUM\" CONTRACT, SELECT APPLICABLE PHRASES; USE THE
\"NO DIRECT PAYMENT\" PHRASE WHEN THE PAY ITEM IN THIS SECTION IS NOT
INCLUDED IN THE BID SCHEDULE.

WHEN NOT A \"LUMP SUM\" CONTRACT AND PAYMENT IS TO BE MADE UNDER THIS
SECTION, SELECT THE PAY ITEM. DO NOT CHANGE PAY ITEM NUMBER. WHEN
GOVERNMENT‑FURNISHED PROPERTY IS SPECIFIED FOR PAY ITEMS, THE LETTER
SUFFIX GF WILL BE ADDED AFTER THE PARENTHESIS OF THE ITEM NUMBER.

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A. Payment: \[No direct payment for the work described under this
section will be made. Consideration for this item shall be included in
the bid price for other items of the Contract.\] \[Prices and payment
will be full compensation for the work described in this section.
Payment will be made under:\]

[Pay Item]{.underline} [Pay Unit]{.underline}

02840(01) Wood-Polymer Composite Lumber Board Foot

END OF SECTION