060573 wood treatment.doc

SECTION 06 05 73

WOOD TREATMENT

PART 1 – GENERAL

1.01 related Documents

A.

Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.02 Summary

A.

This Section includes:

1.

Pressure‑preservative treatment (PPT) where indicated on the Drawings.

B.

Related Requirements:

Section 07 53 24 – Ethylene‑Propylene‑Diene‑Monomer Roofing [Fully Adhered].

1.03

REFERENCES

Abbreviations and Acronyms:

PPT = Pressure‑preservative‑treated.

Definitions:

Or approved equal = Products similar to those listed immediately above and equivalent in quality, function, durability, and longevity (as determined by the Contracting Officer).

C.

Reference Standards:

American Lumber Standard Committee (ALSC): Board of Review.

2.

ASME International:

a.

Square and Hex Bolts and Screws, Inch Series (ASME B‑18.2.1‑1996).

b.

Metric Hex Lag Screws (ASME B‑18.2.3.8M‑1981).

3.

ASTM International: Standard Specification for Driven Fasteners: Nails, Spikes, and Staples (ASTM F‑1667‑00).

4.

American Wood‑Preservers' Association (AWPA) Standards:

All Timber Products – Preservative Treatment by Pressure Processes (AWPA C‑1‑00).

Lumber, Timber, Bridge Ties and Mine Ties – Preservative Treatment by Pressure Processes (AWPA C‑2‑01).

c.

Plywood – Preservative Treatment by Pressure Process (AWPA C‑9‑00).

d.

Wood for Commercial‑Residential Construction — Preservative Treatment by Pressure Processes (AWPA C‑15‑00).

e.

Standard for the Care of Preservative‑Treated Wood Products (AWPA M‑4‑01).

5.

United States Environmental Protection Agency (USEPA) United States Code (USC): Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) Section 3 [7 USC Chapter 6, Subchapter II, Section 136a] (d)(1)(C).

1.04

INFORMATIONAL SUBMITTALS

Manufacturer's Instructions: Submit two copies of Chemical Treatment Manufacturers' instructions for proper use of treated material.

Identify preservative properties, method of treatment, and expected service life.

Distribute a copy of instructions to the Installer and indicate by submitting a copy of the transmittal form.

PART 2 – PRODUCTS

2.01

MATERIALS

A.

Nailers for Roofing: No. 2 grade or better, pressure‑preservative‑treated for rot‑resistance.

B.

Plywood: Having an Exposure 1 bond classification, pressure‑preservative‑treated for rot‑resistance.

2.02 Accessories

Nails, Spikes, and Staples: Select type, size, and finish required for each use. Comply with ASTM F‑1667 for applicable requirements.

Stainless steel.

Bolts, Nuts, Washers, Lags, and Screws:

Size and type to suit application.

Lags: ASME B‑18.2.1 or ASME B‑18.2.3.8M.

2.

Material: Stainless steel.

C.

Anchorages: Unless indicated otherwise herein, anchor as follows.

To steel: Bolts.

To face of hollow masonry: Toggle bolts.

To concrete, grouted masonry, or solid masonry: Expansion shield and lag bolt type.

2.03 Fabrication

Source Tolerances:

Finished Length: Plus‑or‑minus 1/8 inch.

Depth: Plus‑or‑minus 1/16 inch.

Width: Plus‑or‑minus 1/16 inch.

2.04 Finishes

Pressure‑Preservative‑Treatment:

Wood decking, furring, nailer, plates, sheathing, and sleepers shall be PPT for aboveground use per AWPA C‑1, C‑2, C‑9, and C‑15. Preservative shall not be classified under FIFRA as a restricted use pesticide. The incorporation of wood PPT with copper/chromium/arsenate (CCA), creosote, or asphaltic‑based preservatives (for example, creosote) into the Work of this Project will be grounds for rejection of the installation. Acceptable products include:

Natural Select by Arch Wood Protection, Incorporated, Smyrna GA (Website: www.naturalselect.com, Voice: 866.789.4567).

NatureWood by Blue Star Ventures, Incorporated, subsidiary of Osmose Holdings, Incorporated, Buffalo NY (Website: www.osmose.com, Voice: 800.241.0240).

c.

Preserve by Chemical Specialties, Incorporated, Charlotte NC (Website: www.chemspec.com, Voice: 704.522.0825).

d.

Or approved equal.

Complete milling prior to treatment.

After treatment, give all end cuts two heavy brush coats of one‑to‑one mixture of the preservative used for the original treatment.

2.05 Source Quality Control

Each piece of pressure‑preservative‑treated material shall bear the Preservative Manufacturer's trademark and the quality mark of an ALSC‑recognized agency that maintains continuous supervision, testing, and inspection over the quality of the product. Quality marks shall be permanently affixed to each piece and shall include the following information:

Identification of the inspection agency.

Standard to which material was treated.

Identification of the treating plant.

4.

Retention and end use for which product is suitable.

PART 3 – EXECUTION

3.01 Construction

Furring: Provide furring required for the installation of siding. Attach with screws spaced at 16‑inches maximum on center. Shim furring as required to bring to proper line or level.

Provide solid‑wood furring. The use of plywood to satisfy this requirement will be grounds for rejection of the installation.

B.

Deck Sheathing: Nail each panel to each support with which it comes in contact, with 6d common nails for panels 1/2 inch or less and 8d common nails for panels greater than 1/2 inch, at 6‑inches maximum on center for supported panel edges and 12‑inches maximum on center at intermediate supports. Install ends only on supports with joints staggered.

C.

Wall Sheathing: Allow 1/8‑inch spacing at panel ends and edges. Nail 6‑inches maximum on center along supported panel edges and 12‑inches maximum on center at intermediate supports with 6d common nails for panels 1/2 inch and less and 8d common nails for panels thicker than 1/2 inch.

D.

Miscellaneous Items:

Install miscellaneous blocking and nailing strips.

Install members true and level. Secure in place.

Construct members of continuous pieces of longest possible lengths.

3.02 aDJUSTING

Field cuts on pressure‑preservative‑treated wood shall be field‑treated with one of the following per AWPA M‑4:

Copper napthenate.

Ten percent solution of disodium octaborate tetrahydrate (DOT).

Another end coat preservative approved for use by the Preservative Manufacturer.

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06 05 73-2

WOOD TREATMENT

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Revised 3/2/09

12910-330

WOOD TREATMENT

06 05 73-5

Revised 3/2/09