1. How does it work?
FRX® FRT wood works automatically when exposed to fire. No sprinklers or activation is necessary. The FRX chemicals react with combustible gases and tars normally generated by untreated wood, and convert them to carbon char and harmless carbon dioxide and water. Wood loses strength in a fire at the rate at which its cross sectional area is reduced. The surface char acts to insulate underlying wood and reduces the rate at which the cross sectional area is reduced. The carbon dioxide and water vapor dilute the combustible gases to help reduce flame spread.
2. Does it meet building codes?
Yes. FRX wood meets the performance requirements of the model building codes for qualifying applications.
3. Is it used for both residential and commercial applications?
Yes. Click here for an illustration showing where FRX wood can be used in homes. Click here for a 2-minute video to see how FRX wood is used along with firewise landscaping techniques to increase escape time and give homeowners greater security.
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4. What are the fire performance ratings for FRX® wood?
FRX wood has a Class A flamespread index of 25 or less for a variety of species. See fire performance ratings for additional information.
5. Has a code evaluation report been issued?
Yes. Please see ICC ESR-1159 (PDF).
6. Where can I buy FRX wood?
For availability and pricing of FRX wood call toll-free 1-866-USE-FRTW or fax 770-805-3283. In some locations FRX wood is conveniently available through a stocking distributor, Biewer Lumber.
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7. Can I paint or stain FRX wood? What are acceptable coatings?
FRX wood can be painted or stained, but the flammability of the coating should be considered. Click here for additional information.
8. What sizes are available?
All common sizes of most construction species of lumber and plywood can be treated with FRX fire retardant. Size is generally limited only to the treating plant's ability to treat, dry and handle large members. All thicknesses of plywood can be treated; the treatment is also effective for logs, siding, and laminated veneer lumber.
9. Can FRX wood be used in ground contact?
No. FRX wood can be used outdoors, but is intended only for above ground uses.
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10. Is there a reduction in strength compared to untreated wood?
Yes. The treating and drying processes cause a reduction in strength that varies with treatment, species of wood, applications and specific properties. Adjustment factors for FRX wood are shown on the strength properties page.
11. Can I cut FRX wood?
Yes. Cutting lengths, drilling holes, and light sanding are permissible. It is not necessary to field-treat cut ends to maintain the flame spread rating. FRX lumber should not be ripped or milled. FRX plywood can be ripped or cross-cut.
12. What are construction tips for decking?
| • Allow 1/4" to 3/8" gaps between deck boards. |
| • Deck joists should be 16" o.c. (except knotty grades of 5/4 cedar at 12"). |
| • For best results promptly apply water repellent to clean, dry surface. |
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