HomeMy WebLinkAboutMiscellaneous - Exception (51)FRS° Fire Retardant Treated Wood
for Exterior Applications
Invented to reduce flame spread and smoke development, FRX° wood provides tested
fire protection for applications directly exposed to weather; it may be substituted for
materials classified as non-combustible in certain building types designated by the
model building codes and requiring ASTM D 2898 conformance. FRX° wood combines
the beauty and versatility of wood with the fire safety of non-combustible materials.
• Complies with major model • Free of halogens
building codes • Kiln dried aftertreatment
• Tested, proven fire performance . Paper wrapped, military dye available
• Effective for lumber, plywood, logs, • Issued ESR -1159
siding, LVL
FLAME SPREAD AND SMOKE DEVELOPMENT
Model building codes require a
flame spread rating of 25 or less
and a smoke developed rating of
450 or less, when the standard
surface burning test is extended
to 30 minutes to qualify as a
Class A material. FRX® fire
retardant treated wood maintains
ratings less than both those
levels for all species listed. See
accompanying table for specific
ratings by species.
Fire Performance Ratings
As determined in the ASTM E 84 tunnel test
Species Flame Smoke
Spread Development
Southern Pine
15
20
Douglas Fir
15
0
Hem -Fir
20
25
Western Red Cedar
20
45
Spruce
20
0
For exterior use, FRT wood must Southern Pine 20 0
undergo further ASTM E 84
Douglas Fir 15 0
testing, which is conducted on
material that has been through spruce 20 10
the ASTM D 2898 accelerated weathering test, also referred to as the "800 -inch rain
test." This testing protocol has been passed by FRX° wood.
COMMON APPLICATIONS
FRX® fire retardant treated wood may be used in exterior applications permitted by
the codes where public safety is critical, other materials would transfer heat or allow
fires to spread, sprinkler systems cannot easily be installed, corrosive atmospheres
necessitate excessive maintenance of other materials, and where fire protection is
inadequate or not readily available.
TYPICAL EXTERIOR USES
• Wall coverings
• Roof coverings
• Balconies
• Stairways
• Decks
• Open-air roof systems
• Canopies and awnings
• Storefronts and facades
• Eaves, soffits and fascia
• Construction staging
• Agricultural buildings and horse stalls
• Scaffolding and scaffold planks
• Various other residential and commercial uses