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© Western Wood
Preserving Co. |
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FirePRO NER Report |
FirePRO Material Safety Data Sheet |
FirePRO brand fire retardant treated wood (FRTW) is lumber and plywood pressure impregnated with FirePRO Interior Type A High Temperature (HT) fire retardant chemicals. FirePRO brand fire retardant is a new generation, patent pending formulation based on proprietary
Osmose technology. Historically, fire retardants have depended upon phosphorus-based compounds to achieve fire performance properties. While the unique FirePRO chemistry contains no phosphates, independent testing performed in accordance with industry standards has shown FirePRO FRTW to exhibit exceptional fire performance properties without compromising other critical engineering properties such as strength durability, corrosivity and hygroscopicity. In fact, when compared to the untreated wood used in these tests, FirePRO FRTW is available
nationwide through a network of independently owned and operated wood treatment
facilities licensed by Osmose. A 50-Year Limited Warranty against
structural failure due to heat or humidity is available. FirePRO brand fire
retardant treated wood is typically specified for use in areas not exposed to
the weather or wetting and where the adopted building code permits the use of
wood or fire retardant treated wood.
Fire Performance All FirePRO brand fire retardant treated wood is recognized as having flame spread and smoke development ratings of 25 or less when subjected to ASTM E-84 surface burning characteristics in tests of 30 minutes duration without evidence of significant progressive combustion. Consequently, wood treated with FirePRO fire retardant carries the superior UL "FR-S" classification for surface burning characteristics. Moreover, independent combustion toxicity testing has shown that smoke generated by brand fire retardant treated wood is no more toxic that smoke produced by untreated wood. Strength & Durability The structural durability of FirePRO brand fire retardant treated lumber and plywood has been tested by the USDA Forest Products Laboratory*, according to the latest and most stringent versions of ASTM strength durability standards. When tested according to ASTM Standards D5564-95 (lumber) and D5516-96 (plywood), FirePRO brand fire retardant treated wood showed no signs of significant degrade over untreated wood following exposure to the severe test conditions. This structural performance testing demonstrates that lumber and plywood treated with FirePRO chemicals show no indications and no significant potential to experience high temperature strength reductions or exhibit thermal degradation when exposed for extended periods to elevated temperatures and humidity. The National Design Specification (NDS), Wood Handbook, and other publications have cautioned against the use of any wood product in environments exceeding 150oF. Based on the strength data generated when tested per industry protocol at the USDA Forest Products Laboratory, professional engineers have calculated design values and span adjustments to modify the untreated design values for lumber and span ratings for plywood. These design values are applicable at temperatures up to 180oF for lumber and 170oF for plywood (see Tables 1 and 2). Span ratings for FirePRO brand Douglas-Fir plywood are essentially the same as APA Ratings for untreated Douglas-Fir plywood as shown in Table 2. Corrosivity The corrosivity of FirePRO brand fire retardant treated wood has been evaluated in accordance with AWPA Standard E12-94 for a variety of metals. The corrosion rates for carbon steel, galvanized steel, stainless steel, aluminum, red brass, and copper are not significantly increased by FirePRO brand fire retardant chemicals when the treated wood products are used as recommended by the manufacturer and properly sized for the materials selected. The following metal fasteners are recommended for use in contact with FirePRO brand fire retardant treated wood: 2024-T3 aluminum, SAE 1010 steel, hot-dipped zinc galvanized steel, stainless steel, copper, or red brass. Hygroscopicity Hygroscopicity testing conducted by independent laboratories has confirmed that compared to untreated wood, FirePRO brand fire retardant treated wood does not pick up excessive moisture even under humid test conditions. Consequently, FirePRO brand fire retardant treated lumber and plywood qualifies as Interior Type A High Temperature (HT) fire retardant treated wood in accordance with Sections 2.2.2.1 of AWPA Standards C20 and C27, when tested at 92% relative humidity. Applications FirePRO brand fire retardant treated wood is typically permitted for interior, above ground applications such as: roof systems, studs, flooring, joists, sill plates, (when not in direct contact with the ground) blocking and furring, and other interior applications. The specifier and/or end user is responsible to review the test data on FirePRO brand fire retardant treated wood to determine if it is acceptable for the intended end use.*** Available Species FirePRO brand fire retardant treated lumber is available in a wide range of softwood species including:
FirePRO fire retardant treated plywood is available in Douglas-Fir. Installation Structural systems, which include FirePRO brand fire 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. FirePRO brand fire 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. Exposure to precipitation during shipping, storage or installation should be avoided. If material does become wet, it should be replaced. Finishing & Workability Under normal temperature and humidity conditions, latex and oil-based paints, as well as water- and solvent-based stains, can be used with FirePRO brand fire 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 finish, the wood surface should be lightly sanded, cleaned and dry. For best results, always follow the coating manufacturer's label instructions. typical joining cuts, end cuts, and drilled holes will not adversely affect the fire performance of FirePRO brand fire retardant treated wood and no field treatment is required to maintain flame spread ratings. However, ripping or milling of FirePRO FRT lumber is not permitted, as these operations could adversely affect the surface burning characteristics. FirePRO fire retardant treated plywood can be ripped as required. Identification All lumber and plywood treated with FirePRO brand fire retardant chemicals will be identified with the grade mark of an approved quality assurance agency. FirePRO brand fire retardant treated wood will, in addition, bear the Underwriters Laboratories Inc. (ULI) stamp, the producer's name and location, the flame spread rating or FR-S designation, the statement "TP MONITORED STD FR-00", and the National Evaluation Report number, for field identification (see Figure 1).
Copies of tests are available to design professionals
upon request. * The USDA Forest Products Laboratory tested fire retardant formulation FR226-07. FR226-07 is the formulation used to produce Osmose FirePRO brand fire retardant treated wood. It is the policy of the USDA Forest Products Laboratory not to endorse any product. ** "Other available species" were not part of the test protocol and the values were assigned the highest reduction value for each mechanical property from those species tested. *** When designing any structure it is the responsibility of the design professional to take into account environmental, duration of load and other factors as set forth in the NDS and all other applicable design standards, codes, etc. This brochure should be regarded as an adjunct to, and not a substitute for these mandatory and historical references. |
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