������������������������ SECTION 06320

 

�������������� FIRE-RETARDANT TREATMENT OF WOOD

This section is based on products manufactured by Hoover Treated Wood Products, Inc., at the following address:

���� P.O. Box 746

���� Thomson, GA� 30824.

���� Telephone:� 800-832-9663.

���� FAX:� 706-595-1326.

 

"Pyro-Guard" fire-retardant-treated lumber and plywood is a third-generation Type "A" (low-hygroscopic) formula used in interior structural and non-structural applications, and has been strength-rated for use at elevated temperatures by the National Evaluation Service, Inc.

 

PART 1 - GENERAL

 

1.1 SECTION INCLUDES

Delete items below not required for project.

��� A.� Fire-retardant treatment for the following:

������� 1.� Wood framing.

������� 2.� Decking.

������� 3.� Sheathing.

������� 4.� Blocking.

������� 5.� Miscellaneous rough carpentry.

������� 6.� Wood siding.

������� 7.� Wood trim and moldings.

������� 8.� Wood frames for doors, windows, and glazed lights.

������� 9.� _________.

 

1.2 RELATED SECTIONS

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 06125 - Wood Decking.

 

��� D.� Section 06130 - Heavy Timber Construction.

 

��� E.� Section 06135 - Timber Trusses.

 

��� F.� Section 06151 - Wood Chord Metal Joists.

 

��� G.� Section 06193 - Plate-Connected Wood Trusses.

 

��� H.� Section 06196 - Plywood Web Joints.

 

��� I.� Section 06200 - Finish Carpentry.

 

��� J.� Section 06400 - Architectural Woodwork.

 

��� K.� Section 07460 - Wood Siding.

 

1.3 REFERENCES

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

��� A.� AWPA C 20 - Structural Lumber Fire-Retardant Treatment by Pressure Processes;� American Wood Preservers Association.

 

��� B.� AWPA C 27 - Plywood, Fire-Retardant Treatment by Pressure Processes;� American Wood Preservers Association.

 

��� C.� UL 723 - Standard Test Method for Surface Burning Characteristics of Building Materials;� Underwriters Laboratories, Inc.

 

1.4 SUBMITTALS

 

��� A.� Submit under provisions of Section 01300.

 

��� B.� Product Data:

������� 1.� Provide manufacturers data sheets.

������� 2.� Provide National Evaluation Report indicating limitation of use, high temperature strength testing, and flame spread, corrosion, and hygroscopic properties.

������� 3.� Provide installation instructions.

 

��� C.� Samples:�

������� 1.� Submit 6-inch-long samples of each type of wood to be treated.

������� 2.� Provide samples for finishing where finish samples are required by other sections of the specifications.

 

��� D.� Certificates:� Submit wood treater�s certificate of compliance with referenced standards.

 

1.5 DELIVERY, STORAGE, AND HANDLING

 

��� A.� Store products indoors and protect from moisture, construction traffic, and damage.

 

 

PART 2 - PRODUCTS

 

2.1 MANUFACTURER

 

��� A.� Provide fire-retardant wood treatment by or licensed by Hoover Treated Wood Products, Inc., P.O. Box 746, Thomson, GA� 30824.� Telephone 800-832-9663.� FAX 706-595-1326.

 

��� B.� Substitutions will not be acceptable.

 

2.2 MATERIALS

 

��� A.� "Pyro-Guard" third generation fire-retardant treated wood.

 

��� B.� Fire Retardancy:

Delete either of the following 2 paragraphs if treated lumber or plywood is not required.

������� 1.� Lumber:� Type "A" (low-hygroscopic) treatment in accordance with AWPA C 20.

������� 2.� Plywood:� Type "A" (low-hygroscopic) treatment in accordance with AWPA C 27.

������� 3.� Flame spread (UL 723):� Not more than 25.

������� 4.� Smoke toxicity shall be no more than that of untreated wood.

������� 5.� Each piece of treated wood shall bear the UL Classification Mark.

������� 6.� When test is extended for 20 additional minutes (30 minutes total), the flame front while not extend more than 10.5 feet from the center line of the burner and there shall be no evidence of significant progressive combustion.

������� 7.� Treatment formulation shall contain no halogens, sulfates, chlorides, or ammonium phosphate.

 

��� C.� Rated by the National Evaluation Service, Inc. for structural use at elevated temperatures.

 

��� D.� Production and kiln drying after treatment monitored by Timber Products Inspection.

Delete either of the following 2 paragraphs if treated lumber or plywood is not required.

��� E.� Kiln dry lumber to 15 percent or less moisture content after treatment.

 

��� F.� Kiln dry plywood to 19 percent or less moisture content after treatment.

Delete the following article if treated millwork (such as door and window frames and trim, siding, or standing and running trim) is not required.

2.3 FABRICATION

 

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

 

 

PART 3 - EXECUTION

 

3.1 EXAMINATION

 

��� A.� Discard pieces with defects which might impair quality or work.

 

3.2 FIELD CUTTING

Delete the following paragraph if treated lumber is not required.

��� A.� Lumber:� Do not rip or mill lumber after fire-retardant treatment.

������� 1.� End cuts, drilling of holes, and joining cuts are permitted.

Delete the following paragraph if treated plywood is not required.

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

 

3.3 ADJUST AND CLEAN

 

��� A.� Remove scraps and debris from site, and leave in a broom-clean condition.

 

 

����������������������� END OF SECTION