D-Blaze® FRT wood has been tested by independent laboratories following industry standards ASTM D 5516 & ASTM D 5664 to develop strength reduction factors for various use conditions, including roof temperatures of up to 150° F for lumber and 170° F for plywood. Consult Table 1 (D-Blaze® Lumber Strength Design Adjustment Factors) and Table 2, 3 and 4 (D-Blaze® Plywood Span Rating Adjustments) for specific adjustment factors.
Testing and Approvals
D-Blaze® FRT wood meets or exceeds the guidelines for testing construction materials as set forth and/or established by the following authorities and specifications:
Accessories – D-Blaze® Fasteners:
Fasteners used with D-Blaze® fire-retardant-treated wood must be galvanized steel, stainless steel, silicon bronze or copper, in accordance with the 2009 and 2006 IBC Section 2304.9.5, 2009 IRC Section R317.3 or 2006 IRC Section R319.3.
Fastener capacity utilized with D-Blaze® treated wood must be the allowable design capacity for non-treated wood multiplied by the applicable compression parallel-to-grain reduction factor as specified in Table 1.
|Compression Parallel, FC||0.935||0.935||0.935||0.935|
|Bending: Modulus of Elasticity, E||1.000||0.977||0.986||0.997|
|Bending: Extreme Fiber Stress, Fb||0.972||0.740||0.826||0.939|
¹Climate Zone definition:
Zone 1- Minimum design roof live load or maximum ground snow load ≤ 20psf (960 Pa)
Zone 1A – South West Arizona, South East Nevada (area Bounded by Las Vegas – Yuma – Phoenix – Tucson)
Zone 1B – All other qualifying areas of the United States
Zone 2 – Maximum ground snow load ≥ 20psf (960 Pa)
²Duration of load adjustments of snow loads, 7-day (construction) loads, and wind loads as given in the National Design Specifications for Wood Construction applies.