Fire Retardant Treated Wood Is Recognized As A Noncombustible Material

Fire retardant plywood is not considered non combustible but it can often be used in place of non combustible materials in certain situations.

Fire retardant treated wood is recognized as a noncombustible material. The model building codes require that every piece of fire retardant treated wood bear the identification mark of an approved inspection agency. Fire retardant wood is not wood that has been treated with a coating or other external fire retardant and it must be fully incorporated into the wood to be considered a fire retardant wood. Fire retardant treated frt wood is a. Based on astm e136 test fire retardant treated wood is a combustible material and hence it cannot be used in assemblies where the use of noncombustible materials is mandated in determining the fire resistance rating of an assembly through astm e119 test which of the following properties of the assembly are investigated.

Construction types i and ii are defined in ibc section 602 as having all elements of non combustible materials except where permitted in ibc section 603. Construction types iii iv and v may be framed exclusively with wood but exterior walls in types iii and iv buildings are required to be fire retardant treated wood frtw. A material whose core is noncombustible but is covered with a combustible lamination or paint is considered a noncombustible material provided that the thickness of the paint or lamination does not exceed. Most importantly fire retardant wood is a critical safety precaution that attracts buyers reduces insurance costs and saves lives.

Type iii is wood frame with noncombustible or fire retardant treated wood exterior walls type iv is heavy tim ber and type v is generally thought of as wood frame. The 2018 international building code clarifies that fire retardant treated wood frtw manufactured without using the pressure process must be impregnated with chemicals. In determining the fire resistance rating of an assembly through astm. Product overview fire retardant treated frt lumber reduces the effects of fire with innovative materials that impede flame spread and smoke development.

Recognized as an alternative to other noncombustible materials building code agencies have approved frt wood for a wide range of applications. Dricon fire retardant treated frt wood is recognized as an alternative to materials classified as noncombustible for a range of applications by building code organizations and related agencies. And does not increase the corrosivity of metal hardware in contact with the wood. It is far less combustible than traditional plywood which insurance companies the international building code ibc and other sources may take into consideration.