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Fire Retardant Lumber

MasterFormat 06 05 73.13 Fire-Retardant Wood Treatment; 06 14 00 Treated Wood Foundations

This information reflects our best understanding of product composition in 2022.

Untreated lumber is soaked in a pressurized vacuum-sealed treatment bath of water and additives, until the fire retardant (FR) solution has permeated the structure of the wood. The bath is drained and the wood is dried to a maximum moisture...

More about Fire Retardant Lumber

Untreated lumber is soaked in a pressurized vacuum-sealed treatment bath of water and additives, until the fire retardant (FR) solution has permeated the structure of the wood. The bath is drained and the wood is dried to a maximum moisture content level of 19% (15% max for plywood), leaving only the FR additives behind in the cells of the wood. Fire retardant lumber (FRT) is rated for either interior applications (UFCA rated by the American Wood Protection Association) or exterior applications (UFCB). This CP was scoped for interior above-ground structure use where fire retardant treated wood (FRTW) acts to delay the spread of fire and degradation of the structure.

A historical version of this CP is available here: Historical: Fire Retardant Treated/PT Lumber - 2015.

Name % Weight Whole Function GREENSCREEN® Sources
Wood
91.62% Structure Component Subscribe to view
Ammonium dihydrogen phosphate
7722-76-1
5.00% Flame Retardant Subscribe to view
Urea, N-(aminoiminomethyl)-, phosphate (1:?)
17675-60-4
1.93% Flame Retardant Subscribe to view
Borax
1303-96-4
0.84% Antimicrobial pesticide Subscribe to view
Boric acid
10043-35-3
0.60% Flame Retardant Subscribe to view
Name % Weight Part % Weight Whole Function GREENSCREEN® Sources
Wood
91.62% 91.62% Structure Component Subscribe to view
Fire Retardant Pressure Treatment
8.38% 8.38% Flame Retardant Subscribe to view
Ammonium dihydrogen phosphate
7722-76-1
(Nested within Fire Retardant Pressure Treatment)
59.70% 5.00% Flame Retardant Subscribe to view
Urea, N-(aminoiminomethyl)-, phosphate (1:?)
17675-60-4
(Nested within Fire Retardant Pressure Treatment)
23.02% 1.93% Flame Retardant Subscribe to view
Borax
1303-96-4
(Nested within Fire Retardant Pressure Treatment)
10.08% 0.84% Antimicrobial pesticide Subscribe to view
Boric acid
10043-35-3
(Nested within Fire Retardant Pressure Treatment)
7.20% 0.60% Flame Retardant Subscribe to view

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Other Process Chemicals

Other Process Chemicals for Chemical
CASRN NAME GREENSCREEN® TYPE FREQUENCY % WT CHEM % WT PRODUCT SOURCES
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Sources

Sources for Common Product Data
Source Uploaded Document Linked Document
Brochure - Fire Retardant Wood Sources
Brochure - FlamePro
Brochure - ProWood FR
Fact Sheet - D-Blaze
Patent - AU2015271086B2
Patent - US5151225A
Patent - US6652633B2
SDS - D-Blaze
SDS - Dricon Fire Retardant Treated Wood
SDS - FlamePro
SDS - FlameTech
SDS - ProWood FR
SDS - Pyroguard
SDS - Saferwood + Thermex-FR
Specs - Pyroguard
TM - Borates for fire retardancy in cellulosic materials
TM - Dricon Fire Retardant Treated Wood