Fire Retardant Fire Rated Plywood Stamp

Fire retardant plywood on its own does not have an hourly resistance rating.

Fire retardant fire rated plywood stamp. Cdx 5 ply interior fire rated fir pressure treated plywood 97874 the home depot. Code compliant stamps must contain this information. Building codes require stamps on fire retardant treated wood products for both interior use and exterior use to have the same seven elements as listed above. Wwpi fire retardant members product brands and respective qc monitoring agencies.

Product coloration is not a substitute for a building code approved third party inspection agency label. The stamp has a lot of information as well. A fire retardant treated backboard will be designated with a fire rated stamp branded or stamped along the edge or center of the plywood ul fr s plywood 1780 r 7003 i always look for the stamp. Exterior fire retardants may also be used in interior applications.

Exterior use products must have one additional element referencing the specific standard for fire retardant lumber and plywood exposed to weather. The product is decay and termite resistant. A fire retardant treated backboard will be designated with a fire rated stamp branded or stamped along the edge or center of the plywood ul fr s plywood 1780 r 7003 marine grade plywood does not qualify even though it is saline treated as it will have a different ul number. The approved rated ulc or factory mutual assemblies which may contain fire retardant plywood as a component would have the hourly resistance rating.