Technical Specifications
CORROSIVITY
The corrosivity of FlamePRO brand re retardant treated wood has been evaluated in accordance
with AWPA Standard E12 for a variety of metals. The corrosion rates for carbon steel, galvanized steel,
aluminum, red brass, and copper are not signicantly increased by FlamePRO brand re retardant
chemicals when the treated wood products are used as recommended by the manufacturer and properly
sized for the materials selected.
HYGROSCOPICITY
Hygroscopicity testing conducted by a third party independent laboratory has conrmed that compared to untreated wood, FlamePro brand
re retardant treated wood does not pick up excessive moisture under ASTM D3201 test conditions.
INSTALLATION
Structural systems, which include FlamePRO brand re retardant treated lumber or plywood, should be designed and installed in accordance with
the adopted building code using the appropriate lumber design adjustment factors and plywood spans from Tables 1 and 2. Ventilation should be
provided in compliance with the applicable codes in force at time of construction.
FlamePRO brand re retardant treated wood is not permitted for applications where the material may be exposed to precipitation, direct wetting,
regular condensation, and should never be used in contact with the ground.
If the wood is to be used in an interior application and becomes wet during construction, it should be allowed to dry before being covered or enclosed.
FINISHING AND WORKABILITY
Under normal temperature and humidity conditions, latex and oil-based paints, as well as water- and solvent-based stains, can be used with
FlamePRO brand re retardant treated wood. If prolonged exposure to high humidity conditions is expected, special surface preparation
procedures including the use of an appropriate primer are recommended. Before application of any nish, the wood surface should be lightly
sanded, cleaned and dry. For best results, always follow the coating manufacturer’s label instructions.
TESTING AND STANDARDS
UL 723 - Surface Burning Characteristics
ASTM E84 - Surface Burning Characteristics
ASTM 2768 – Extended 30-minute Test
ASTM E119 - Fire Tests of Building Construction
ASTM D3201 - Hygroscopic Properties
ASTM D5516 - Flexural Properties Plywood
ASTMM D5664 – Flexural Properties Lumber
ASTM D6305 - Strength Design
ASTM D6841 - Treatment Adjustment Factors
AWPA E12 – Determining Corrosion of Metal
AWPA M4 – Care of Treated Wood
AWPA P50 – Standard for Fire Retardants
AWPA T1 – Treatment Standard
IDENTIFICATION
Lumber and plywood treated with FlamePRO re retardant formulation must be identied by the
structural grade mark of an approved agency. In addition, all treated stamps must list name of the
inspection agency Underwriters Laboratories (FR-S); Timber Products Inspection, Inc. (AC-66); Southern
Pine Inspection Bureau (AA-680); the production plant identication; labeling information in accordance
with Section 2303.2.4 of the 2018, 2015, 2012 and 2009 IBC and Section 2303.2.1 of the 2006 IBC or Section
R802.1.5.4 of the 2018 and 2015 IRC or Section R802.1.3.4 of the 2012 and 2009 IRC or Section R802.1.3.1 of
the 2006 IRC; and the evaluation report number (ESR-4244).
Typical joining cuts, end cuts, and drilled holes will not adversely affect the re performance of FlamePRO brand re retardant treated wood and
no eld treatment is required to maintain ame spread ratings. However, ripping or milling of FlamePRO FRT lumber is not permitted, as these
operations could adversely affect the surface burning characteristics. FlamePRO re retardant treated plywood can be ripped as required.
The following metal fasteners are recommended for use in contact with FlamePRO brand re retardant
treated wood: 2024-T3 aluminum, SAE 1010 steel, hot-dip zinc galvanized steel, copper, or red brass.
WARRANTY
FlamePRO Fire Retardant pressure treated wood products are backed by a 50 Year Limited Warranty Program from Koppers Performance
Chemicals Inc. (KPC). The Limited Warranty provides protection against a reduction in strength below the strength properties published in
ESR-4244 caused by the FlamePRO re retardant chemical. See Warranty for details. Available at Koppers Performance Chemicals Inc., Attn:
Consumer Affairs, P. O. Drawer O, Grifn, Georgia 30224-0249 or visit www.kopperspc.com
• Southern Pine
• Douglas Fir
• Western Hemlock
• Alpine Fir
• Lodgepole Pine
• White Spruce
• Spruce-Pine-Fir
• Red Spruce
• Balsam Fir
• Jack Pine
• Engelmann Spruce
• Black Spruce
• Red Pine
• Ponderosa Pine
• White Fir
• Hem Fir
FlamePRO re retardant treated plywood is available in Southern Pine and Douglas-Fir.
AVAILABLE SPECIES
FlamePRO brand re retardant treated lumber is available in a wide range of softwood species including: