Pyro-Guard® Interior Fire Retardant Treated WoodOverview
Pyro-Guard is pressure-impregnated, interior fire-retardant treated lumber and plywood for enclosed structural applications.
Pyro-Guard is recommended for enclosed structural applications such as:
- Plywood roof sheathing
- Roof trusses
- Floor joists
- Load-bearing walls
- Floor sheathing
- Partition walls
- Interior beams
- Plywood subfloors
- Wall sheathing
- Telecomm/electrical panels
Pyro-Guard has been strength-tested after prolonged exposure to elevated temperatures and moisture to verify its strength characteristics when used in roof systems and other recommended applications.
Pyro-Guard plywood span ratings and lumber design value adjustments are based on strength testing after prolonged exposure to high temperatures experienced in roof applications.
Pyro-Guard is used for interior structural applications such as ceiling and floor joists.
Pyro-Guard fire-retardant treated wood is produced in 5 strategically located company-owned facilities and is distributed by an extensive nationwide network of stocking distributors.
Exterior Fire-X® retardant treated wood is recommended for exterior exposures and other applications exposed to dampness, high humidity or wetting.
E-mail Hoover's Technical Service Department or request sales information.
- Construction with Pyro-Guard treated wood requires no special tools or skills.
- Pyro-Guard trusses and roof decks often qualify a masonry wall building as "non-combustible" for insurance purposes.
- Pyro-Guard can often be substituted for non-combustible materials without affecting building classification.
- Use of Pyro-Guard wood partitions instead of untreated partitions often allows for an increase in square footage and lower insurance rates.
- The use of Pyro-Guard wood roof decking is usually accepted in lieu of parapet walls in multi-family dwellings.
- Even when sprinklers are mandatory, the use of Pyro-Guard can further reduce fire insurance rates.
- Pyro-Guard is commonly accepted by building codes for partition walls, store fronts, fixtures and roof construction in shopping centers.
Pyro-Guard is pressure impregnated deep into the wood to provide permanent protection, unlike coatings, which only provide superficial protection.
When Pyro-Guard treated wood is exposed to fire, non-combustible gas and water vapor are produced, and a layer of protective char forms, which hinders combustion and insulates the wood against further damage.
Pyro-Guard interior fire-retardant treated wood has a low rate of fuel contribution and heat release, and it maintains structural integrity longer than other building materials such as steel. Consequently, fire damages and repair costs are minimized, resulting in reduced insurance rates.
Pyro-Guard has successfully passed a stringent combustion toxicity test. Smoke produced by Pyro-Guard treated wood was no more toxic than smoke produced by untreated wood.
Pyro-Guard was the first FRTW (fire-retardant treated wood) to be issued a Code Compliance Report based on high temperature testing for roof sheathing and framing uses.
ICC Evaluation Service
ICC-ESR-1791 has been issued for Pyro-Guard by the International Code Council, confirming compliance with National, Uniform and Standard building codes.
ICC-ESR-1791 contains conditions of use and strength adjustments for roof sheathing, roof framing and other applications.
Pyro-Guard meets the flame spread requirement of all building codes which is 25 or less, as determined by Underwriters Laboratories in the extended 30 minute duration of ASTM E-84, "Standard Test Method for Surface Burning Characteristics of Building Materials." Each piece of treated wood bears the Underwriters Laboratories Classification mark identifying it as being produced under its Classification and Follow Up Services.
Pyro-Guard is often approved as a substitute for non-combustible materials in applications such as wall studs and roof systems.
Pyro-Guard should not be confused with fire-retardant surface coatings, because test requirements and code definitions are entirely different for each. Pyro-Guard is pressure impregnated and carries a flamespread rating derived by Underwriters Laboratories in the 30 minute ASTM E-84 flamespread test, while coatings are sprayed, brushed or rolled on the surface and flame tested for only 10 minutes. Fire retardant coated wood is superficially protected at best, and it does not meet code requirements for structural uses.
Hoover Treated Wood Products, Inc.
154 Wire Road
Thomson, GA 30824
Tollfree: (800) 832-9663
Fax: (706) 595-6600
Web site: http://www.frtw.com