Interior Fire-Retardant Treated Wood

SECTION 06074

INTERIOR FIRE-RETARDANT TREATED WOOD

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** NOTE TO SPECIFIER ** Hoover Treated Wood Products, Inc.; Fire-retardant treated wood for interior use.

This section is based on products manufactured by Hoover Treated Wood Products, 1nc., at the following address:
154 Wire Road NW
Thomson, GA 30824
Toll Free Tel: (800) 531-5558
Te1: (706) 595-1264
FAX: 706-595-8462
Email:
Web: www.frtw.com
Technical Service (800) 832-9663
[ Click Here ] for additional information
Hoover Treated Wood Products, 1nc. has treatment facilities in Thomson, GA; Pine Bluff, AK; Milford, VA; Detroit, MI; Winston, OR and our licensee in Kilfoyle Krafts in Price, UT.
Pyro Guard meets the requirements of The International Building Code (IBC) and the International Residential Code (IRC) for fire retardant treated wood. Pyro Guard has been issued an Evaluation Service Report (ESR-1791) by the ICC Evaluation Service, 1nc. which includes design value adjustments for use at elevated temperatures.
Pyro-Guard is classified by Underwriters Laboratories (UL) as a low-hygroscopic Type "A" pressure impregnated fire retardant treatment for lumber and plywood. Pyro Guard can be used in interior structural and non-structural applications. Pyro-Guard interior fire retardant is recommended for enclosed applications, including roof sheathing, where it is not exposed to the weather, dampness, high humidity or wetting.

This specification section covers the fire retardant treatment and handling and fabrication of treated materials. Grades and species of plywood and lumber to be treated must be specified separately.

PART 1 GENERAL

1.1 SECTION INCLUDES

** NOTE TO SPECIFIER ** Delete items below not required for project.

A. Fire-retardant treatment for the following interior applications:

1. Wood framing.

2. Roof and floor sheathing / decking.

3. Blocking.

4. Miscellaneous rough carpentry.

5. Wood trim and moldings.

6. Wood frames for doors, windows, and glazed lights.

1.2 RELATED SECTIONS

** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.

A. Section 06075 - Preservative Treatment of Wood.

B. Section 06100 - Rough Carpentry.

C. Section 06110 - Wood Framing.

D. Section 06114 - Wood Blocking and Curbing.

E. Section 06130 - Heavy Timber Construction.

F. Section 06150 - Wood Decking.

G. Section 06170 - Prefabricated Structural Wood.

H. Section 06200 - Finish Carpentry.

I. Section 06400 - Architectural Woodwork.

1.3 REFERENCES

** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.

A. ASTM D 3201 - Standard Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Base Products.

B. ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials.

C. ESR-1791 - ES Report for Pyro-Guard Fire Retardant Treated Wood, ICC Evaluation Service, Inc.

D. UL - UL Listed and Certified Products.

1.4 SUBMITTALS

A. Submit under provisions of Section 01300.

B. Product Data: Manufacturer's data sheets on each product to be used, including:

1. ICC Evaluation Service Report, indicating flame spread, high temperature design value adjustments, corrosion and fastener recommendations, hygroscopic properties and conditions of use.

2. Product Specifications.

3. Storage and handling requirements and recommendations.

4. Installation methods.

C. Manufacturer's Treatment Certificates: Certify products meet or exceed specified requirements.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Store products under cover or shelter, off the ground with proper ventilation allowing for air circulation and protect from construction traffic, and damage in accordance with manufacturers recommendations.

1.6 SEQUENCING

A. Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.

PART 2 PRODUCTS

2.1 MANUFACTURERS

** NOTE TO SPECIFIER ** Hoover Treated Wood Products, Inc. has treatment facilities in Thomson, GA; Pine Bluff, AK; Milford, VA; Detroit, MI; Winston, OR and our licensee in Kilfoyle Krafts in Price, UT. Material specified under this specification will be provided from one of these locations.

A. Acceptable Manufacturer: Hoover Treated Wood Products, Inc., which is located at: 154 Wire Rd.; Thomson, GA 30824; Toll Free Tel: 800-TEC-WOOD; Tel: 706-595-5058; Fax: 706-595-6600; Email: ; Web: www.frtw.com

** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.

B. Substitutions: Not permitted.

C. Requests for substitutions will be considered in accordance with provisions of Section 01600.

2.2 APPLICATIONS/SCOPE

A. All lumber and plywood designated to be interior fire treated shall be pressure impregnated with Pyro-Guard. Pyro-Guard is provided in conformance with the following:

1. ASTM D 3201 - Standard Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Base Products.

2. ASTM D 5516 - Standard Test Method for Evaluating the Flexural Properties of Fire-Retardant Treated Softwood Plywood Exposed to Elevated Temperatures.

3. ASTM D 5664 - Standard Test Method for Evaluating the Effects of Fire-Retardant Treatments and Elevated Temperatures on Strength Properties of Fire-Retardant Treated Lumber.

4. ASTM D 6305 - Practice for Calculating Bending Strength Design Adjustment Factors for Fire-retardant-Treated Plywood Roof Sheathing.

5. ASTM D 6841 - Standard Practice for Calculating Design Value Treatment Adjustment Factors for Fire-Retardant-Treated Lumber.

6. ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials.

7. NFPA 255 - Standard Method of Test of Surface Burning Characteristics of Building Materials.

8. NFPA 703 - Standard for Fire Retardant Treated Wood and Fire-Retardant Coating for Building Materials.

9. Mil Spec. L-19140E Lumber and Plywood Fire-Retardant Treated.

10. ESR-1791 - ES Report for Pyro-Guard Fire Retardant Treated Wood, ICC Evaluation Service, Inc.

11. UL - UL Listed and Certified Products.

** NOTE TO SPECIFIER ** Include the following paragraphs as required for the project. Delete paragraphs not relevant to this project. Contact manufacturer for additional information.

B. Provide lumber of the appropriate grade and species after consideration of design value adjustments in ESR-1791 of the ICC Evaluation Service, Inc. as specified by the design criteria of the intended application.

C. Provide plywood of the appropriate size, grade and species after consideration of design value adjustments in ESR-1791 of the ICC Evaluation Service, Inc. as specified by the design criteria of the intended application.

2.3 FIRE RETARDANT TREATMENT

A. Lumber and Plywood: Pressure impregnated with Pyro-Guard in accordance with Follow-up Service procedures of Underwriters Laboratories Inc. Fire-retardant treatment shall contain no halogens, sulfates, chlorides, ammonium phosphate, urea formaldehyde, or formaldehyde.

1. Species and Grade as specified in:

** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.

a. Section 06100 - Rough Carpentry.

b. Section 06110 - Wood Framing.

c. Section 06114 - Wood Blocking and Curbing.

d. Section 06130 - Heavy Timber Construction.

e. Section 06150 - Wood Decking.

f. Section 06170 - Prefabricated Structural Wood.

g. Section 06200 - Finish Carpentry.

h. Section: _____ - ______.

2. Surface Burning Characteristics: Flame spread index of 25 or less and flame spread not more than 10.5 feet beyond centerline of burners with no evidence of significant progressive combustion when tested in accordance with ASTM E 84 for a total of 30 minutes.

3. Moisture Content:

a. Equilibrium moisture content of not more than 28 percent when tested in accordance with ASTM D 3201 at 92 percent relative humidity.

b. Kiln dry lumber to 19 percent or less moisture content after treatment.

c. Kiln dry plywood to 15 percent or less moisture content after treatment.

4. Labeling: Each piece of lumber and plywood shall be labeled with a permanent ink marking as follows:

a. Bear the UL Classification Mark certifying specified flame spread rating.

b. Plywood shall be marked on both sides

c. Production and kiln drying after treatment monitored by Timber Products Inspection, 1nc., with each piece labeled KDAT

d. Marked evaluated for high temperature strength for roof applications by the ICC Evaluation Service, Inc

B. Provide design value adjustments and span ratings evaluated by ICC Evaluation Service, Inc

2.4 FABRlCATlON

A. Milling: Lumber shall be ripped or run to pattern, prior to treatment.

B. Surface milling or planing is not allowed after treatment

C. Cross grain cuts are allowed.

D. Plywood may be cut in any direction.

PART 3 EXECUTION

3.1 EXAMINATION

A. Discard pieces with defects that might impair quality or work.

B. Examine for wet conditions before installation; do not install materials that are wet or have been wet, unless they can be dried to original specified kiln dried moisture content.

3.2 PREPARATION

A. Clean surfaces thoroughly prior to installation.

B. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

3.3 FIELD CUTTING

A. Lumber: Do not rip or mill lumber after fire-retardant treatment; end cuts and joining cuts are permitted. Drilling of holes and notching permitted in accordance with American Forest and Paper Association Wood Construction Data #1.

B. Plywood: Fire-retardant-treated plywood may be cut in any direction.

3.4 APPLICATION

A. Install in accordance with manufacturer's instructions.

B. Comply with additional requirements specified in Section _____.

C. Structural Applications: Use design value tables listed in ICC Evaluation Service Report ESR-1791.

** NOTE TO SPECIFIER ** Include the following two paragraphs as required for roof sheathing systems. Delete if not required.

D. Provide adequate airflow across at least one surface in wood roof systems to control moisture and reduce temperature.

E. Cover roof sheathing with felt or roofing immediately after installation. If wetted during construction, allow to dry before enclosure or covering with roofing material.

F. Termite and decay resistance Pyro Guard is not recommended for use where exposed to precipitation, direct wetting, regular condensation, or ground contact. Do not use in contact with concrete that is in direct contact with soil.

G. Use corrosion resistant fasteners for all types of treated wood. Acceptable for use with galvanized nails, truss plates, ductwork, plumbing, conduit and copper.

** NOTE TO SPECIFIER ** Include the following paragraph as required for applied finish systems. Delete if not required. Pyro-Guard treated wood can be finished or glued with good results. As with untreated wood, finish and adhesive performance is highly dependent on moisture content, species, surface preparation, application method, and finishing system. Prior test applications of applied finishes are recommended.

H. Coordinate surface preparation and applied finishes with the requirements of Section 09900.

3.5 PROTECTION

A. Protect installed products until completion of project.

B. Repair or replace damaged products before Substantial Completion.

END OF SECTION

06074-1