Fire Retardant Treated Wood (FRTW) and Preservatives
Handling Requirements for D-Blaze® FRTW and Plywood
D-Blaze® FRTW must be kept dry during transit and on the jobsite by covering the top of the bundle, storing the material under shelter, elevating the bundle from ground contact, and allowing for air circulation around the wood.
Roof sheathing should be covered as soon as practical after installation. If D-Blaze FRTW becomes wet during construction, allow to dry before enclosure or covering with roofing material to pre-installation requirements: 19 percent maximum moisture content for lumber and 15 percent for plywood.
When installing D-Blaze FRT lumber and plywood, it is important to utilize the design value adjustments in our technical guide.
D-Blaze® plywood should be spaced and fastened as recommended in “APA Engineered Wood Construction Guide" (Form E30), published by APA, The Engineered Wood Association.
Cutting to length, drilling, and diagonal cuts (cross-cutting and end cuts) as well as light sanding are permitted. Exposed areas are not required to be field coated.
Holes and joints such as tongue and groove, bevel, scarf and lap are also allowed.
Ripping dimensional lumber is not allowed. Ripping of lumber along the length, such as ripping a 2x4 into 2x2's is not permitted. Similarly, cutting of stair stringers after treatment should not be done because the effect is similar to ripping.
Milling (resurfacing) of lumber is not allowed. If special shapes or thickness are required, milling should be done prior to treatment.
Cutting of plywood in any direction is allowed without restriction.
Light sanding of lumber or plywood is permitted to remove raised grain or to prepare for finishing.
Resurfacing or shaping or should be done before treatment.
End coating is not required.
D-Blaze must not be used in ground contact applications.
Chemicals used for FRTW are not considered hazardous materials. FRT wood can be disposed of by typical means in accordance with local waste management policies.
